Hard positions posted for 6 last moonths

Discussion of anything and everything relating to chess playing software and machines.

Moderators: hgm, Dann Corbit, Harvey Williamson

peter
Posts: 3167
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Hard positions posted for 6 last moonths

Post by peter »

Vinvin wrote: ↑Wed Dec 16, 2020 3:55 am A very deep pawn endgame with many sacrifices to win : http://talkchess.com/forum3/viewtopic.p ... 73#p869973
2k5/1p3pp1/p1p1p1p1/2P1P1P1/PP1P1P1P/K7/8/8 w - - bm f5;
Best so far in this one very fine study from J. Heinz, on my old Xeon X5670 (24 threads of 12x3GHz) is still Eman, here with Full Analysis Depth 27 and nullmove pruning disabled, Pure NNUE, net nn-62ef826d1a6d.nnue

[d]2k5/1p3pp1/p1p1p1p1/2P1P1P1/PP1P1P1P/K7/8/8 w - -

Engine: Eman 6.61 64-bit SSE41 POPCNT0 (32768 MB)
by Khalid Omar

Code: Select all

1/01   0:17   +0.25    1.Kb3 (461) 0 

...
8/08   0:17   +0.52    1.Kb3 Kd8 2.Kc3 Ke8 3.Kd3 Kd8 4.Ke2 Kc8 
                       5.Ke1 (214.008) 12 

8/09   0:17   +0.56    1.b5 Kd7 2.Kb4 axb5 3.axb5 Kc8 4.Ka5 (229.716) 13 

...
9/12   0:17   +0.52    1.Kb2 Kd7 2.Kc3 Kc8 3.Kc4 Kd8 4.Kb3 Ke8 
                       5.Kc2 (344.115) 19 
...
44/57  1:09   +0.21    1.Kb2 Kd7 2.Kc2 Kd8 3.Kb3 Ke7 4.Kc4 Ke8 
                       5.Kc3 Kd7 6.Kd2 Kd8 7.Ke3 Ke8 8.Kf2 Kd8 
                       9.Kf1 Kd7 10.Ke2 Ke8 11.Ke3 Kd8 
                       12.f5 gxf5 13.h5 Ke7 14.h6 (1.016.575.659) 14621 

45/46  1:22   +0.27++  1.f5 (1.233.190.958) 14968 

45/46  1:26   +0.33++  1.f5 (1.290.664.362) 14920 

45/46  1:32   +0.44++  1.f5 (1.375.367.504) 14946 

45/46  1:33   +0.62++  1.f5 (1.410.711.401) 15017 

45/46  1:36   +0.87++  1.f5 (1.464.685.323) 15139 

45/46  1:47   +1.19++  1.f5 (1.664.545.378) 15423 

45/46  1:56   +1.62++  1.f5 (1.846.168.551) 15799 

45/57  2:09   +2.19++  1.f5 (2.076.456.477) 16037 

45/76  2:32   +2.20    1.f5 exf5 2.Kb3 Kd7 3.d5 cxd5 4.Kc3 Ke6 
                       5.b5 Kxe5 6.b6 d4+ 7.Kc4 d3 8.c6 d2 
                       9.cxb7 d1Q 10.b8Q+ Qd6 11.Qe8+ Kf4 
                       12.a5 f6 13.Qe2 Qc6+ 14.Kb3 (2.463.117.334) 16101 

46/41  3:21   +2.28++  1.f5 (3.354.972.928) 16653 

46/41  3:54   +2.37++  1.f5 (4.024.041.639) 17178 

46/41  4:23   +2.49++  1.f5 (4.694.226.170) 17818 

46/41  5:20   +2.67++  1.f5 (6.035.510.565) 18844 

46/41  6:05   +2.91++  1.f5 (7.051.756.663) 19304 

46/50  6:46   +3.09    1.f5 exf5 2.Kb3 Kd7 3.d5 Kc8 4.Kc4 Kd8 
                       5.d6 Kd7 6.Kd3 Ke8 7.Kd4 Kd7 8.Ke3 Ke6 
                       9.Kf4 a5 10.bxa5 f6 11.exf6 gxf6 
                       12.gxf6 Kxf6 13.a6 bxa6 14.a5 (8.083.644.895) 19897
Peter.
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Dann Corbit
Posts: 12478
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Hard positions posted for 6 last moonths

Post by Dann Corbit »

Also for me Shashchess is much faster than any other engine I tried.

Code: Select all

 1                      
    Avoid move: 
    Best move (ShashChess15.1-x86-64-avx2): f4-f5
    Not found in: 31:21
   Found 746 tablebases
   NNUE evaluation using nn-04cf2b4ed1da.nnue enabled
     2/2	00:00	         11k	2,833k	+0.32	Kb3  Kd8  Kc4  Kc8
     3/3	00:00	         16k	3,902k	+0.39	Kb3  Kd8  Kc3
     4/4	00:00	         54k	10,760k	+0.38	Kb2  Kd8  Kb3  Kc7
     5/6	00:00	         69k	13,876k	+0.68	Kb3  Kd8  Kc3  Kc7
     6/6	00:00	         98k	19,556k	+0.61	Kb3  Kd7  Kc4  Kd8  Kc3
     7/7	00:00	        113k	22,504k	+0.61	Kb3  Kd8  Kc4  Kd7  Kd3  Kd8  Kd2
     8/8	00:00	        133k	26,629k	+0.69	Kb3  Kd7  Kb2  Kc8  Kc3  Kd8  Kc4  Ke8
     9/9	00:00	        157k	26,187k	+0.54	Kb3  Kd7  Kb2  Kc8  Kc2  Kd7  Kd3  Ke8  Ke3  Kd8
    10/10	00:00	        179k	29,915k	+0.69	Kb3  Kd7  Kc2  Ke7  Kd2  Kd7  Ke3  Ke8  Ke4  Kd8
    11/13	00:00	        326k	46,589k	+0.53	Kb3  Kd8  Ka2  Ke7  Kb1  Kd8  Kc1  Ke8  Kd2  Kd7  Ke3  Ke8  Ke4
    12/12	00:00	        429k	53,638k	+0.53	Kb3  Kd8  Kc3  Kc7  Kc4  Kd8  Kd3  Ke7  Kc2  Ke8  Kb1
    13/13	00:00	        459k	57,357k	+0.54	Kb3  Kd8  Kc4  Kc7  Kc3  Kd7  Kd2  Kd8  Ke3  Ke7  Ke2  Ke8  Kf3
    14/14	00:00	        506k	56,179k	+0.54	Kb3  Kd8  Kc4  Kd7  Kc3  Ke8  Kc2  Kd8  Kd3  Ke7  Ke3  Kd7  Ke2  Ke8  Kf3
    15/15	00:00	        587k	65,230k	+0.56	Kb3  Kd8  Kc4  Kc7  Kd3  Kd8  Kd2  Ke8  Ke3  Ke7  Kf2  Kd8  Kg3  Kd7  Kf3  Kd8  a5
    16/16	00:00	        619k	68,771k	+0.54	Kb3  Kd8  Kc4  Kc7  Kd3  Kd8  Kd2  Ke8  Ke2  Kd8  Kf2  Ke8  Kg3  Kd7  Kh3  Kd8
    17/17	00:00	        671k	67,137k	+0.54	Kb3  Kd8  Kc4  Kc7  Kd3  Kd8  Kd2  Kd7  Kd1  Ke7  Kc2  Ke8  Kb1  Ke7  Kb2  Kd8  Kc1
    18/18	00:00	        743k	67,545k	+0.54	Kb3  Kd8  Kc3  Kd7  Kd2  Kd8  Ke3  Ke8  Kf2  Kd7  Kg3  Ke8  Kh2  Kd8  Kg2  Ke8  Kg3  Kd7
    19/19	00:00	        817k	74,288k	+0.54	Kb3  Kd8  Kc3  Kd7  Kd2  Kd8  Ke3  Ke8  Kf2  Kd7  Ke1  Ke8  Kd1  Ke7  Ke2  Ke8  Ke3  Ke7  Kf3  Kd8  Kg2
    20/26	00:00	      1,598k	84,093k	+0.54	Kb3  Kd7  Kb2  Ke7  Kc2  Kd8  Kc1  Ke8  Kd1  Ke7  Ke2  Ke8  Ke1  Kd8  Kf2  Kd7  Kg2  Kc8  Kf3
    21/21	00:00	      1,695k	84,757k	+0.54	Kb3  Kd7  Kb2  Ke7  Kc2  Kd8  Kc1  Ke8  Kd1  Ke7  Ke2  Ke8  Kf3  Kd8  Kg3  Ke8  Kg2  Kd7  Kf1  Kc8  Ke1
    22/23	00:00	      1,882k	85,539k	+0.54	Kb3  Kd7  Kb2  Ke7  Kc2  Kd8  Kc1  Ke8  Kd1  Ke7  Ke2  Ke8  Kf3  Kd8  Kg3  Ke8  Kg2  Kd7  Kf1  Kd8  Ke1  Ke8  Ke2
    23/23	00:00	      2,094k	91,064k	+0.54	Kb3  Kd7  Kb2  Ke8  Kc3  Kd8  Kd2  Kd7  Kd1  Ke7  Ke2  Ke8  Kf3  Kd8  Kg2  Ke8  Kg3  Kd7  Kf2  Ke8  Ke2  Kd8  Ke1  Ke8  Kf2
    24/26	00:00	      2,895k	96,494k	+0.54	Kb3  Kd7  Kb2  Ke8  Kc3  Kd8  Kd2  Kd7  Kd1  Ke7  Ke2  Ke8  Kf3  Kd8  Kf2  Kd7  Kg3  Ke8  Kg2  Kd8  Kf3  Ke7  Ke3  Ke8
    25/25	00:00	      4,998k	99,968k	+0.46	Kb3  Kd8  Kc4  Kd7  Kc3  Kd8  Kb3  Ke8  Kb2  Kd8  Kb1  Ke8  Kc1  Ke7  Kc2  Kd8  Kd1  Ke7  Ke1  Ke8  Ke2  Kd8  Kf2  Kc8  Kf1
    26/31	00:00	      9,764k	97,639k	+0.54	Kb3  Kd7  b5  a5  Kc4  Ke8  f5  gxf5  h5  Kf8  Kd3  Kg8  Ke3  Kh7  b6  g6  h6  Kh8  Kf3  Kg8  Ke2  Kf8  Ke3  Kg8  Kf3  Kh7
    27/27	00:00	     11,098k	98,208k	+0.46	Kb3  Kd7  Kc4  Ke8  Kd3  Kd8  Ke4  Ke7  Kf3  Kd8  Kf2  Kc8  Ke3  Kd7  Kd2  Ke7  Ke1  Kd7  Kf1  Ke7  Kf2  Ke8  Kg2  Ke7  Kf1  Kd8  Kg1
    28/29	00:00	     11,340k	98,611k	+0.46	Kb3  Kd7  Kc4  Ke8  Kd3  Kd8  Ke4  Ke7  Kf3  Kd8  Kf2  Kc8  Ke3  Kd7  Kd2  Ke7  Ke1  Kd7  Kf1  Ke7  Kf2  Kd7  Kg3  Ke7  Kg4  Ke8  Kh3  Kd8
    29/29	00:00	     11,962k	99,687k	+0.46	Kb3  Kd7  Kc4  Ke8  Kc3  Ke7  Kd3  Kd8  Ke4  Ke7  Kf3  Kd8  Kg4  Ke8  Kg3  Kd7  Kg2  Ke8  Kf1  Kd8  Kg1  Kc8  Kf2  Kd8  Kf3  Ke7  Ke2  Ke8  Ke1
    30/30	00:00	     12,147k	99,563k	+0.46	Kb3  Kd7  Kc4  Ke8  Kd3  Kd8  Ke4  Ke7  Ke3  Ke8  Kf2  Kd8  Kf1  Ke8  Ke1  Kd8  Kd1  Kd7  Kc1  Ke8  Kb2  Ke7  Kc2  Ke8  Kc1  Ke7  Kd2  Kd8  Kd3  Kd7
    31/31	00:00	     14,730k	100,202k	+0.46	Kb3  Kd7  Kc4  Ke8  Kc3  Ke7  Kd3  Kd8  Ke4  Ke7  Kf3  Kd8  Kf2  Ke8  Ke1  Kd8  Kd1  Kd7  Kd2  Kd8  Ke1  Kc8  Kf2  Kd8  Kf3  Ke7  Kg3  Kd7  Kg2  Ke8  Kh3
    32/32	00:00	     16,358k	100,355k	+0.46	Kb3  Kd7  Kc4  Ke8  Kc3  Ke7  Kd3  Kd8  Ke4  Kc8  Kf3  Kd8  Kg3  Kd7  Kh3  Kd8  Kh2  Ke7  Kg2  Ke8  Kg1  Kd7  Kf1  Ke8  Ke2  Kd7  Ke3  Kd8  Kf3  Ke7  Kg4  Ke8  Kg3
    33/33	00:00	     18,541k	100,768k	+0.46	Kb3  Kd7  Kc4  Ke8  Kd3  Kd8  Ke4  Kc8  Ke3  Kd8  Kf3  Ke8  Kg4  Ke7  Kh3  Kd8  Kh2  Ke7  Kg1  Kd7  Kf1  Ke7  Ke1  Kd8  Kd1  Ke8  Kd2  Kd8  Ke1  Kc8  Kd1  Kd7  Ke2
    34/38	00:00	     37,899k	106,758k	+0.40	Kb3  Kd7  Kc4  Kd8  Kd3  Ke7  Ke2  Ke8  Ke3  Ke7  Kd3  Kd8  Kd2  Kd7  Kd1  Ke7  Ke1  Ke8  Ke2  Kd7  Kf3  Ke7  Kg4  Ke8  h5  gxh5+  Kxh5  Ke7  Kg4  g6  Kf3  Kd7  Ke3  Kd8  Ke2
    35/40	00:00	     38,543k	106,767k	+0.40	Kb3  Kd7  Kc3  Ke8  Kb2  Ke7  Kc1  Ke8  Kd1  Ke7  Kd2  Kd7  Ke1  Ke8  Kf1  Kd7  Kg2  Ke8  Kh3  Kd8  Kg3  Kd7  Kg4  Ke8  h5  gxh5+  Kxh5  Ke7  Kg4  g6  Kf3  Kd8  Ke2  Kd7  Kf2  Kd8  Ke1  Kd7  Ke2  Kd8
    36/45	00:00	     41,228k	107,086k	+0.40	Kb3  Kd7  Kc3  Ke8  Kc4  Ke7  Kd3  Ke8  Ke2  Kd7  Kd1  Ke7  Kd2  Kd7  Ke2  Ke8  Kf3  Kd8  Kg4  Kd7  h5  gxh5+  Kxh5  Ke7  Kg4  g6  Kg3  Kd8  Kf2  Kc8  Kf3  Kd8  Ke4  Ke7  Kd3  Kd8  Kc4  Kd7  b5
    37/40	00:00	     46,853k	107,461k	+0.40	Kb3  Kd7  Kc4  Kd8  Kd3  Kd7  Ke4  Ke7  Ke3  Ke8  Kf3  Kd8  Kg4  Kd7  h5  gxh5+  Kxh5  Ke7  Kg4  g6  Kg3  Ke8  Kf3  Kd7  Ke2  Kd8  Kd2  Kd7  Ke1  Kc8  Kf1  Kd8  Ke2  Ke8  Kd1  Ke7  Kc2  Kd8  Kc3  Ke8
    38/38	00:00	     54,880k	107,188k	+0.40	Kb3  Kd7  Kc4  Kd8  Kd3  Kd7  Ke4  Ke7  Kf3  Kd8  Ke2  Ke8  Ke1  Ke7  Kf2  Kd8  Kf1  Ke7  Ke1  Ke8  Ke2  Kd8  Kd1  Kd7  Kc1  Ke7  Kb2  Kf8  Kb3  Ke8  Kc3  Kd7  Kd3  Ke8  b5  a5  Ke4  Kd8
    39/42	00:00	     67,318k	109,105k	+0.40	Kb3  Kd7  Kc4  Kd8  Kd3  Kd7  Ke2  Ke8  Kd2  Kd8  Ke3  Kc8  Kf3  Kd8  Kg3  Ke8  Kh3  Kd8  Kh2  Kd7  Kg1  Ke7  Kf2  Kd8  Kf1  Ke8  Ke2  Kd8  Kd2  Ke7  Kd1  Kd7  Kc1  Ke7  Kb2  Kf8  Kc2  Ke8  Kb1
    40/43	00:00	     87,597k	110,323k	+0.40	Kb3  Kd7  Kc4  Kd8  Kd3  Kd7  Ke2  Ke8  Kf3  Kd8  Ke4  Ke7  Ke3  Ke8  Ke2  Kd8  Kd1  Ke7  Kd2  Kd8  Kc2  Ke8  Kc1  Ke7  Kd1  Kd7  Ke1  Ke7  Kf2  Kd8  Kg1  Ke7  Kg2  Ke8  Kh3  Kd8  Kh2  Ke7  Kg3  Kd8  Kh3
    41/42	00:00	    104,626k	110,716k	+0.35	Kb3  Kd7  Kc4  Kd8  Kd3  Ke8  Ke3  Kd8  Kf2  Kc8  Kg2  Kd8  Kg3  Ke8  Kg4  Kd7  h5  gxh5+  Kxh5  Ke7  Kg4  g6  Kf3  Kd8  Kf2  Kd7  Kf1  Kd8  Ke1  Kc8  Ke2  Kd7  Kd2  Kd8  Kd3  Ke7  Ke4  Kd8  Kf3  Ke8  Ke3  Kd8
    42/43	00:01	    129,582k	111,805k	+0.35	Kb3  Kd7  Kc4  Kd8  Kd3  Ke8  Ke3  Kd8  Kf2  Kc8  Ke1  Kd8  Kf1  Ke7  Kg2  Ke8  Kg1  Ke7  Kh2  Kd8  Kh3  Ke8  Kg4  Kd7  h5  gxh5+  Kxh5  Ke7  Kg4  g6  Kg3  Ke8  Kg2  Ke7  Kf2  Kd7  Kf3  Kd8  Ke2  Ke8  Ke3  Kd8  Kf3  Ke8
    43/47	00:02	    237,345k	116,345k	+0.27	Kb3  Kd7  Kb2  Kd8  Ka3  Kd7  Kb3  Ke8  Kc2  Kd8  Kd3  Kd7  Ke3  Kd8  Kf2  Ke8  Kf3  Ke7  Kg4  Kf8  Kh3  Ke7  Kh2  Kd8  Kh1  Ke7  Kg1  Kd7  Kf1  Ke7  Ke1  Ke8  Kd2  Ke7  Kd1  Kf8  Kc2  Ke8  Kb1  Kd7  Ka1  Ke7  Ka2
    44/45	00:02	    264,885k	115,519k	+0.26	Kb3  Kd7  Kb2  Kd8  Ka3  Kd7  Kb3  Ke8  Ka2  Kd7  Ka1  Ke7  Kb1  Ke8  Kc1  Kd8  Kd2  Ke7  Ke2  Ke8  Kf2  Kd8  Kf1  Ke7  Kg1  Kd7  Kg2  Ke8  Kh3  Ke7  Kg4  Kf8  h5  gxh5+  Kxh5  g6+  Kh4  Ke8  Kg3  Kd7  Kg2  Ke7  Kf3  Kd8  Kg4
    45/47	00:03	    387,479k	117,453k	+0.19	Kb3  Kd7  Kc3  Ke8  Kd3  Kd7  Ke4  Ke7  Ke3  Ke8  Kf2  Kd8  Kg2  Kd7  Kh3  Ke7  Kg3  Ke8  Kh2  Kd7  Kg2  Kd8  Kf2  Ke8  Ke1  Ke7  b5  a5  b6  Kd7  Ke2  Kd8  Kf2  Ke8  Kf3  Ke7  Kg4  Kf8  Kh3  Ke7  Kh2  Kd7  Kg3  Kd8  Kg4
    46/48	00:03	    449,974k	116,664k	+0.19	Kb3  Kd7  Kc3  Ke8  Kd3  Kd7  Ke4  Ke8  Kf3  Ke7  Kf2  Ke8  Kg2  Kd8  Kh1  Kd7  Kg1  Kd8  Kg2  Kd7  Kf1  Ke8  Kf2  Kd8  Ke1  Ke7  b5  a5  b6  Kd7  Ke2  Ke8  Kf3  Ke7  Kg4  Kf8  Kg3  Ke8  f5  gxf5  h5  Kf8  Kh4  Kg8  Kh3  Kf8
    47/49	00:03	    450,627k	116,652k	+0.19	Kb3  Kd8  Kc2  Kd7  Kb1  Kd8  Kc1  Ke8  Kd2  Kd7  Ke3  Kd8  Ke4  Ke8  Kf3  Ke7  Kf2  Ke8  Kg2  Kd8  Kh3  Ke7  Kh2  Ke8  Kh1  Kd7  Kg1  Kd8  Kg2  Kd7  Kg3  Ke7  Kf3  Ke8  Kg4  Kf8  b5  cxb5  axb5  axb5  Kf3  Ke7  Ke2  Ke8  Kd2  Kd8  Kc3  Kd7  Kb4
    48/51	00:04	    559,478k	114,647k	+0.19	Kb3  Kd8  Kc2  Kd7  Kb1  Kd8  Kc1  Ke8  Kd2  Kd7  Ke3  Kd8  Ke4  Ke8  Kf3  Ke7  Kf2  Ke8  Kg2  Kd8  Kh3  Ke7  Kh2  Ke8  Kh1  Kd7  Kg1  Kd8  Kg2  Kd7  Kg3  Ke7  Kf3  Ke8  Kg4  Kf8  b5  Ke8  b6  a5  h5  Kf8  f5  gxf5+  Kf3  Ke8  Kg2  Ke7  Kf2
    49/50	00:05	    616,653k	113,648k	+0.19	Kb3  Kd8  Kc2  Kd7  Kb1  Kd8  b5  Ke8  Kb2  a5  Kc3  Kd7  Kc4  Ke8  b6  Ke7  Kd3  Kd8  Ke4  Ke8  Kf3  Kd7  f5  gxf5  h5  Ke8  Ke3  Kf8  Ke2  Kg8  Kf3  Kf8  Ke3  Kg8  Kf4  g6  h6  Kh8  Kf3  Kg8  Kg3  Kh7  Kg2  Kh8  Kf2  Kh7  Ke3  Kh8  Ke2  Kg8  Ke3
    50/50	00:06	    699,507k	112,280k	+0.19	Kb3  Kd7  Kb2  Kd8  b5  Ke8  b6  a5  Kc3  Kd8  Kd3  Ke8  Ke3  Kd7  f5  gxf5  h5  Ke7  Kf4  g6  h6  Kf8  Kf3  Kg8  Ke2  Kh7  Ke3  Kh8  Kf4  Kh7  Kg3  Kg8  Kf3  Kh7  Ke2  Kg8  Kd3  Kh8  Kc3  Kh7  Kc2  Kg8  Kb2  Kh7  Kc3  Kh8  Kb3  Kg8  Kc4  Kh8
    51/52	00:06	    734,375k	111,811k	+0.19	Kb3  Kd7  Kb2  Kd8  b5  Ke8  b6  a5  Kc3  Kd8  Kd3  Ke8  Ke3  Kd7  f5  gxf5  h5  Ke7  Ke2  Kf8  Kf2  Ke8  Kf3  Kf8  Ke2  Kg8  Kd3  g6  h6  Kh8  Ke2  Kg8  Kf3  Kh8  Kg3  Kg8  Kh2  Kh8  Kg1  Kg8  Kh1  Kh8  Kh2  Kh7  Kh3  Kg8  Kg3  Kh7  Kf4  Kh8  d5  exd5
    52/54	00:07	    797,930k	111,349k	+0.19	Kb3  Kd7  Kb2  Kd8  b5  Ke8  b6  a5  Kc3  Kd8  Kd3  Ke8  Ke3  Kd7  f5  gxf5  h5  Ke7  Ke2  Kf8  Kf2  Ke8  Kf3  Kf8  Ke2  Kg8  Kd2  Kf8  Kc2  Kg8  Kb3  g6  h6  Kh8  Kc4  Kg8  Kd3  Kh8  Ke3  Kg8  Ke2  Kh8  Kf3  Kg8  Kg3  Kh8  Kg2  Kg8  Kg1  Kh7  Kf2  Kh8  d5  exd5
    53/55	00:08	    924,133k	109,976k	+0.19	Kb3  Kd7  Kb2  Kd8  b5  Ke8  b6  a5  Kc3  Kd8  Kd3  Ke8  Ke3  Kd7  f5  gxf5  h5  Ke7  Kd2  Kf8  Ke2  Kg8  Ke3  Kf8  Kf4  Kg8  d5  exd5  Kxf5  Kf8  Kg4  Kg8  Kf3  Kf8  Kf2  Ke7  Ke3  Kf8  Kf3  Kg8  Ke2  Kf8  Ke1  Ke7  Kd2  Kf8  Kc2  g6  h6  Kg8  Kb2  Kh8  Kc3  Kh7  Kd3
    54/58	00:18	  2,105,946k	115,401k	+0.14	Kb3  Kd7  Kc4  Ke8  Kd3  Kd7  Ke4  Kd8  Kf3  Ke8  Kg4  Kf8  Kg3  Ke7  Kh3  Ke8  Kh2  Ke7  Kg1  Kd7  Kf1  Kd8  Kf2  Ke8  Kf3  Ke7  Ke3  Kd7  Kd3  Ke8  Kc4  Kd8  Kc3  Ke7  Kb2  Kd8  Kc1  Ke8  Kb1  Kd8  Kb2  Kd7  Kb3  Ke7  Kc3  Kd8  Kd2  Ke8  Kc1  Kd8  Kd1  Kd7  Ke1  Ke8
    55/60+	00:27	  3,199,999k	116,563k	+0.22	f5
    55/60+	00:29	  3,338,870k	115,133k	+0.30	f5
    55/60+	00:42	  4,639,021k	109,883k	+1.18	f5
    55/60	00:52	  5,649,164k	107,270k	+1.61	f5  exf5  Kb3  Kd7  d5  Kd8  d6  Kc8  Kc4  Kd8  Kd3  Kc8  Ke3  Kd8  Kf2  Ke8  Kf3  Kd7  Ke2  Ke6  Kf2  a5  bxa5  Kd7  Kf3  Kd8  Ke3  Kd7  a6  bxa6  a5  Ke8  Kf4  Kd8  Kf3  Kd7  Kg3  Ke8  Kg2  Kd8  Kf2  Kd7  Kf3  Kd8  Kf4  Kc8  h5  gxh5  Kxf5  Kd7  g6  fxg6+  Kxg6  h4  Kf7
    56/33+	01:08	  7,330,823k	106,553k	+1.69	f5
    56/33+	01:14	  7,982,540k	107,583k	+1.77	f5
    56/89+	08:14	 54,836,363k	110,929k	+5.29	f5
    56/89	11:48	 77,727,501k	109,666k	+6.11	f5  exf5  Kb3  Kc7  Kc3  Kc8  d5  cxd5  Kd3  Kd8  b5  axb5  axb5  Ke7  Kd2  b6  cxb6  Kd7  Kd3  f4  Ke2  Kc8  Kf3  Kb8  Kxf4  Kb7  Kf3  Kc8  b7+  Kb8  Ke2  Ka7  b8R  Kxb8  Kf3  Ka7  Kg2  Kb7  h5  Kc8  Kf1  gxh5  g6  Kd8  gxf7  Ke7  f8Q+  Kxf8  e6  h4  b6  Ke7  Kf2  Ke8  b7
    57/29-	12:00	 78,896,281k	109,570k	+5.91	f5  exf5
    57/31+	12:55	 84,692,006k	109,213k	+6.11	f5
    57/35+	17:41	114,984,019k	108,364k	+6.66	f5
   12/16/2020 2:01:52 PM, Time for this analysis: 00:19:34, Rated time: 31:21

0 of 1 matching moves
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Zenmastur
Posts: 919
Joined: Sat May 31, 2014 8:28 am

Re: Hard positions posted for 6 last moonths

Post by Zenmastur »

Dann Corbit wrote: ↑Wed Dec 16, 2020 11:14 pm Also for me Shashchess is much faster than any other engine I tried.

Code: Select all

 1                      
    Avoid move: 
    Best move (ShashChess15.1-x86-64-avx2): f4-f5
    Not found in: 31:21
   Found 746 tablebases
   NNUE evaluation using nn-04cf2b4ed1da.nnue enabled
     2/2	00:00	         11k	2,833k	+0.32	Kb3  Kd8  Kc4  Kc8
     3/3	00:00	         16k	3,902k	+0.39	Kb3  Kd8  Kc3
     4/4	00:00	         54k	10,760k	+0.38	Kb2  Kd8  Kb3  Kc7
     5/6	00:00	         69k	13,876k	+0.68	Kb3  Kd8  Kc3  Kc7
     6/6	00:00	         98k	19,556k	+0.61	Kb3  Kd7  Kc4  Kd8  Kc3
     7/7	00:00	        113k	22,504k	+0.61	Kb3  Kd8  Kc4  Kd7  Kd3  Kd8  Kd2
     8/8	00:00	        133k	26,629k	+0.69	Kb3  Kd7  Kb2  Kc8  Kc3  Kd8  Kc4  Ke8
     9/9	00:00	        157k	26,187k	+0.54	Kb3  Kd7  Kb2  Kc8  Kc2  Kd7  Kd3  Ke8  Ke3  Kd8
    10/10	00:00	        179k	29,915k	+0.69	Kb3  Kd7  Kc2  Ke7  Kd2  Kd7  Ke3  Ke8  Ke4  Kd8
    11/13	00:00	        326k	46,589k	+0.53	Kb3  Kd8  Ka2  Ke7  Kb1  Kd8  Kc1  Ke8  Kd2  Kd7  Ke3  Ke8  Ke4
    12/12	00:00	        429k	53,638k	+0.53	Kb3  Kd8  Kc3  Kc7  Kc4  Kd8  Kd3  Ke7  Kc2  Ke8  Kb1
    13/13	00:00	        459k	57,357k	+0.54	Kb3  Kd8  Kc4  Kc7  Kc3  Kd7  Kd2  Kd8  Ke3  Ke7  Ke2  Ke8  Kf3
    14/14	00:00	        506k	56,179k	+0.54	Kb3  Kd8  Kc4  Kd7  Kc3  Ke8  Kc2  Kd8  Kd3  Ke7  Ke3  Kd7  Ke2  Ke8  Kf3
    15/15	00:00	        587k	65,230k	+0.56	Kb3  Kd8  Kc4  Kc7  Kd3  Kd8  Kd2  Ke8  Ke3  Ke7  Kf2  Kd8  Kg3  Kd7  Kf3  Kd8  a5
    16/16	00:00	        619k	68,771k	+0.54	Kb3  Kd8  Kc4  Kc7  Kd3  Kd8  Kd2  Ke8  Ke2  Kd8  Kf2  Ke8  Kg3  Kd7  Kh3  Kd8
    17/17	00:00	        671k	67,137k	+0.54	Kb3  Kd8  Kc4  Kc7  Kd3  Kd8  Kd2  Kd7  Kd1  Ke7  Kc2  Ke8  Kb1  Ke7  Kb2  Kd8  Kc1
    18/18	00:00	        743k	67,545k	+0.54	Kb3  Kd8  Kc3  Kd7  Kd2  Kd8  Ke3  Ke8  Kf2  Kd7  Kg3  Ke8  Kh2  Kd8  Kg2  Ke8  Kg3  Kd7
    19/19	00:00	        817k	74,288k	+0.54	Kb3  Kd8  Kc3  Kd7  Kd2  Kd8  Ke3  Ke8  Kf2  Kd7  Ke1  Ke8  Kd1  Ke7  Ke2  Ke8  Ke3  Ke7  Kf3  Kd8  Kg2
    20/26	00:00	      1,598k	84,093k	+0.54	Kb3  Kd7  Kb2  Ke7  Kc2  Kd8  Kc1  Ke8  Kd1  Ke7  Ke2  Ke8  Ke1  Kd8  Kf2  Kd7  Kg2  Kc8  Kf3
    21/21	00:00	      1,695k	84,757k	+0.54	Kb3  Kd7  Kb2  Ke7  Kc2  Kd8  Kc1  Ke8  Kd1  Ke7  Ke2  Ke8  Kf3  Kd8  Kg3  Ke8  Kg2  Kd7  Kf1  Kc8  Ke1
    22/23	00:00	      1,882k	85,539k	+0.54	Kb3  Kd7  Kb2  Ke7  Kc2  Kd8  Kc1  Ke8  Kd1  Ke7  Ke2  Ke8  Kf3  Kd8  Kg3  Ke8  Kg2  Kd7  Kf1  Kd8  Ke1  Ke8  Ke2
    23/23	00:00	      2,094k	91,064k	+0.54	Kb3  Kd7  Kb2  Ke8  Kc3  Kd8  Kd2  Kd7  Kd1  Ke7  Ke2  Ke8  Kf3  Kd8  Kg2  Ke8  Kg3  Kd7  Kf2  Ke8  Ke2  Kd8  Ke1  Ke8  Kf2
    24/26	00:00	      2,895k	96,494k	+0.54	Kb3  Kd7  Kb2  Ke8  Kc3  Kd8  Kd2  Kd7  Kd1  Ke7  Ke2  Ke8  Kf3  Kd8  Kf2  Kd7  Kg3  Ke8  Kg2  Kd8  Kf3  Ke7  Ke3  Ke8
    25/25	00:00	      4,998k	99,968k	+0.46	Kb3  Kd8  Kc4  Kd7  Kc3  Kd8  Kb3  Ke8  Kb2  Kd8  Kb1  Ke8  Kc1  Ke7  Kc2  Kd8  Kd1  Ke7  Ke1  Ke8  Ke2  Kd8  Kf2  Kc8  Kf1
    26/31	00:00	      9,764k	97,639k	+0.54	Kb3  Kd7  b5  a5  Kc4  Ke8  f5  gxf5  h5  Kf8  Kd3  Kg8  Ke3  Kh7  b6  g6  h6  Kh8  Kf3  Kg8  Ke2  Kf8  Ke3  Kg8  Kf3  Kh7
    27/27	00:00	     11,098k	98,208k	+0.46	Kb3  Kd7  Kc4  Ke8  Kd3  Kd8  Ke4  Ke7  Kf3  Kd8  Kf2  Kc8  Ke3  Kd7  Kd2  Ke7  Ke1  Kd7  Kf1  Ke7  Kf2  Ke8  Kg2  Ke7  Kf1  Kd8  Kg1
    28/29	00:00	     11,340k	98,611k	+0.46	Kb3  Kd7  Kc4  Ke8  Kd3  Kd8  Ke4  Ke7  Kf3  Kd8  Kf2  Kc8  Ke3  Kd7  Kd2  Ke7  Ke1  Kd7  Kf1  Ke7  Kf2  Kd7  Kg3  Ke7  Kg4  Ke8  Kh3  Kd8
    29/29	00:00	     11,962k	99,687k	+0.46	Kb3  Kd7  Kc4  Ke8  Kc3  Ke7  Kd3  Kd8  Ke4  Ke7  Kf3  Kd8  Kg4  Ke8  Kg3  Kd7  Kg2  Ke8  Kf1  Kd8  Kg1  Kc8  Kf2  Kd8  Kf3  Ke7  Ke2  Ke8  Ke1
    30/30	00:00	     12,147k	99,563k	+0.46	Kb3  Kd7  Kc4  Ke8  Kd3  Kd8  Ke4  Ke7  Ke3  Ke8  Kf2  Kd8  Kf1  Ke8  Ke1  Kd8  Kd1  Kd7  Kc1  Ke8  Kb2  Ke7  Kc2  Ke8  Kc1  Ke7  Kd2  Kd8  Kd3  Kd7
    31/31	00:00	     14,730k	100,202k	+0.46	Kb3  Kd7  Kc4  Ke8  Kc3  Ke7  Kd3  Kd8  Ke4  Ke7  Kf3  Kd8  Kf2  Ke8  Ke1  Kd8  Kd1  Kd7  Kd2  Kd8  Ke1  Kc8  Kf2  Kd8  Kf3  Ke7  Kg3  Kd7  Kg2  Ke8  Kh3
    32/32	00:00	     16,358k	100,355k	+0.46	Kb3  Kd7  Kc4  Ke8  Kc3  Ke7  Kd3  Kd8  Ke4  Kc8  Kf3  Kd8  Kg3  Kd7  Kh3  Kd8  Kh2  Ke7  Kg2  Ke8  Kg1  Kd7  Kf1  Ke8  Ke2  Kd7  Ke3  Kd8  Kf3  Ke7  Kg4  Ke8  Kg3
    33/33	00:00	     18,541k	100,768k	+0.46	Kb3  Kd7  Kc4  Ke8  Kd3  Kd8  Ke4  Kc8  Ke3  Kd8  Kf3  Ke8  Kg4  Ke7  Kh3  Kd8  Kh2  Ke7  Kg1  Kd7  Kf1  Ke7  Ke1  Kd8  Kd1  Ke8  Kd2  Kd8  Ke1  Kc8  Kd1  Kd7  Ke2
    34/38	00:00	     37,899k	106,758k	+0.40	Kb3  Kd7  Kc4  Kd8  Kd3  Ke7  Ke2  Ke8  Ke3  Ke7  Kd3  Kd8  Kd2  Kd7  Kd1  Ke7  Ke1  Ke8  Ke2  Kd7  Kf3  Ke7  Kg4  Ke8  h5  gxh5+  Kxh5  Ke7  Kg4  g6  Kf3  Kd7  Ke3  Kd8  Ke2
    35/40	00:00	     38,543k	106,767k	+0.40	Kb3  Kd7  Kc3  Ke8  Kb2  Ke7  Kc1  Ke8  Kd1  Ke7  Kd2  Kd7  Ke1  Ke8  Kf1  Kd7  Kg2  Ke8  Kh3  Kd8  Kg3  Kd7  Kg4  Ke8  h5  gxh5+  Kxh5  Ke7  Kg4  g6  Kf3  Kd8  Ke2  Kd7  Kf2  Kd8  Ke1  Kd7  Ke2  Kd8
    36/45	00:00	     41,228k	107,086k	+0.40	Kb3  Kd7  Kc3  Ke8  Kc4  Ke7  Kd3  Ke8  Ke2  Kd7  Kd1  Ke7  Kd2  Kd7  Ke2  Ke8  Kf3  Kd8  Kg4  Kd7  h5  gxh5+  Kxh5  Ke7  Kg4  g6  Kg3  Kd8  Kf2  Kc8  Kf3  Kd8  Ke4  Ke7  Kd3  Kd8  Kc4  Kd7  b5
    37/40	00:00	     46,853k	107,461k	+0.40	Kb3  Kd7  Kc4  Kd8  Kd3  Kd7  Ke4  Ke7  Ke3  Ke8  Kf3  Kd8  Kg4  Kd7  h5  gxh5+  Kxh5  Ke7  Kg4  g6  Kg3  Ke8  Kf3  Kd7  Ke2  Kd8  Kd2  Kd7  Ke1  Kc8  Kf1  Kd8  Ke2  Ke8  Kd1  Ke7  Kc2  Kd8  Kc3  Ke8
    38/38	00:00	     54,880k	107,188k	+0.40	Kb3  Kd7  Kc4  Kd8  Kd3  Kd7  Ke4  Ke7  Kf3  Kd8  Ke2  Ke8  Ke1  Ke7  Kf2  Kd8  Kf1  Ke7  Ke1  Ke8  Ke2  Kd8  Kd1  Kd7  Kc1  Ke7  Kb2  Kf8  Kb3  Ke8  Kc3  Kd7  Kd3  Ke8  b5  a5  Ke4  Kd8
    39/42	00:00	     67,318k	109,105k	+0.40	Kb3  Kd7  Kc4  Kd8  Kd3  Kd7  Ke2  Ke8  Kd2  Kd8  Ke3  Kc8  Kf3  Kd8  Kg3  Ke8  Kh3  Kd8  Kh2  Kd7  Kg1  Ke7  Kf2  Kd8  Kf1  Ke8  Ke2  Kd8  Kd2  Ke7  Kd1  Kd7  Kc1  Ke7  Kb2  Kf8  Kc2  Ke8  Kb1
    40/43	00:00	     87,597k	110,323k	+0.40	Kb3  Kd7  Kc4  Kd8  Kd3  Kd7  Ke2  Ke8  Kf3  Kd8  Ke4  Ke7  Ke3  Ke8  Ke2  Kd8  Kd1  Ke7  Kd2  Kd8  Kc2  Ke8  Kc1  Ke7  Kd1  Kd7  Ke1  Ke7  Kf2  Kd8  Kg1  Ke7  Kg2  Ke8  Kh3  Kd8  Kh2  Ke7  Kg3  Kd8  Kh3
    41/42	00:00	    104,626k	110,716k	+0.35	Kb3  Kd7  Kc4  Kd8  Kd3  Ke8  Ke3  Kd8  Kf2  Kc8  Kg2  Kd8  Kg3  Ke8  Kg4  Kd7  h5  gxh5+  Kxh5  Ke7  Kg4  g6  Kf3  Kd8  Kf2  Kd7  Kf1  Kd8  Ke1  Kc8  Ke2  Kd7  Kd2  Kd8  Kd3  Ke7  Ke4  Kd8  Kf3  Ke8  Ke3  Kd8
    42/43	00:01	    129,582k	111,805k	+0.35	Kb3  Kd7  Kc4  Kd8  Kd3  Ke8  Ke3  Kd8  Kf2  Kc8  Ke1  Kd8  Kf1  Ke7  Kg2  Ke8  Kg1  Ke7  Kh2  Kd8  Kh3  Ke8  Kg4  Kd7  h5  gxh5+  Kxh5  Ke7  Kg4  g6  Kg3  Ke8  Kg2  Ke7  Kf2  Kd7  Kf3  Kd8  Ke2  Ke8  Ke3  Kd8  Kf3  Ke8
    43/47	00:02	    237,345k	116,345k	+0.27	Kb3  Kd7  Kb2  Kd8  Ka3  Kd7  Kb3  Ke8  Kc2  Kd8  Kd3  Kd7  Ke3  Kd8  Kf2  Ke8  Kf3  Ke7  Kg4  Kf8  Kh3  Ke7  Kh2  Kd8  Kh1  Ke7  Kg1  Kd7  Kf1  Ke7  Ke1  Ke8  Kd2  Ke7  Kd1  Kf8  Kc2  Ke8  Kb1  Kd7  Ka1  Ke7  Ka2
    44/45	00:02	    264,885k	115,519k	+0.26	Kb3  Kd7  Kb2  Kd8  Ka3  Kd7  Kb3  Ke8  Ka2  Kd7  Ka1  Ke7  Kb1  Ke8  Kc1  Kd8  Kd2  Ke7  Ke2  Ke8  Kf2  Kd8  Kf1  Ke7  Kg1  Kd7  Kg2  Ke8  Kh3  Ke7  Kg4  Kf8  h5  gxh5+  Kxh5  g6+  Kh4  Ke8  Kg3  Kd7  Kg2  Ke7  Kf3  Kd8  Kg4
    45/47	00:03	    387,479k	117,453k	+0.19	Kb3  Kd7  Kc3  Ke8  Kd3  Kd7  Ke4  Ke7  Ke3  Ke8  Kf2  Kd8  Kg2  Kd7  Kh3  Ke7  Kg3  Ke8  Kh2  Kd7  Kg2  Kd8  Kf2  Ke8  Ke1  Ke7  b5  a5  b6  Kd7  Ke2  Kd8  Kf2  Ke8  Kf3  Ke7  Kg4  Kf8  Kh3  Ke7  Kh2  Kd7  Kg3  Kd8  Kg4
    46/48	00:03	    449,974k	116,664k	+0.19	Kb3  Kd7  Kc3  Ke8  Kd3  Kd7  Ke4  Ke8  Kf3  Ke7  Kf2  Ke8  Kg2  Kd8  Kh1  Kd7  Kg1  Kd8  Kg2  Kd7  Kf1  Ke8  Kf2  Kd8  Ke1  Ke7  b5  a5  b6  Kd7  Ke2  Ke8  Kf3  Ke7  Kg4  Kf8  Kg3  Ke8  f5  gxf5  h5  Kf8  Kh4  Kg8  Kh3  Kf8
    47/49	00:03	    450,627k	116,652k	+0.19	Kb3  Kd8  Kc2  Kd7  Kb1  Kd8  Kc1  Ke8  Kd2  Kd7  Ke3  Kd8  Ke4  Ke8  Kf3  Ke7  Kf2  Ke8  Kg2  Kd8  Kh3  Ke7  Kh2  Ke8  Kh1  Kd7  Kg1  Kd8  Kg2  Kd7  Kg3  Ke7  Kf3  Ke8  Kg4  Kf8  b5  cxb5  axb5  axb5  Kf3  Ke7  Ke2  Ke8  Kd2  Kd8  Kc3  Kd7  Kb4
    48/51	00:04	    559,478k	114,647k	+0.19	Kb3  Kd8  Kc2  Kd7  Kb1  Kd8  Kc1  Ke8  Kd2  Kd7  Ke3  Kd8  Ke4  Ke8  Kf3  Ke7  Kf2  Ke8  Kg2  Kd8  Kh3  Ke7  Kh2  Ke8  Kh1  Kd7  Kg1  Kd8  Kg2  Kd7  Kg3  Ke7  Kf3  Ke8  Kg4  Kf8  b5  Ke8  b6  a5  h5  Kf8  f5  gxf5+  Kf3  Ke8  Kg2  Ke7  Kf2
    49/50	00:05	    616,653k	113,648k	+0.19	Kb3  Kd8  Kc2  Kd7  Kb1  Kd8  b5  Ke8  Kb2  a5  Kc3  Kd7  Kc4  Ke8  b6  Ke7  Kd3  Kd8  Ke4  Ke8  Kf3  Kd7  f5  gxf5  h5  Ke8  Ke3  Kf8  Ke2  Kg8  Kf3  Kf8  Ke3  Kg8  Kf4  g6  h6  Kh8  Kf3  Kg8  Kg3  Kh7  Kg2  Kh8  Kf2  Kh7  Ke3  Kh8  Ke2  Kg8  Ke3
    50/50	00:06	    699,507k	112,280k	+0.19	Kb3  Kd7  Kb2  Kd8  b5  Ke8  b6  a5  Kc3  Kd8  Kd3  Ke8  Ke3  Kd7  f5  gxf5  h5  Ke7  Kf4  g6  h6  Kf8  Kf3  Kg8  Ke2  Kh7  Ke3  Kh8  Kf4  Kh7  Kg3  Kg8  Kf3  Kh7  Ke2  Kg8  Kd3  Kh8  Kc3  Kh7  Kc2  Kg8  Kb2  Kh7  Kc3  Kh8  Kb3  Kg8  Kc4  Kh8
    51/52	00:06	    734,375k	111,811k	+0.19	Kb3  Kd7  Kb2  Kd8  b5  Ke8  b6  a5  Kc3  Kd8  Kd3  Ke8  Ke3  Kd7  f5  gxf5  h5  Ke7  Ke2  Kf8  Kf2  Ke8  Kf3  Kf8  Ke2  Kg8  Kd3  g6  h6  Kh8  Ke2  Kg8  Kf3  Kh8  Kg3  Kg8  Kh2  Kh8  Kg1  Kg8  Kh1  Kh8  Kh2  Kh7  Kh3  Kg8  Kg3  Kh7  Kf4  Kh8  d5  exd5
    52/54	00:07	    797,930k	111,349k	+0.19	Kb3  Kd7  Kb2  Kd8  b5  Ke8  b6  a5  Kc3  Kd8  Kd3  Ke8  Ke3  Kd7  f5  gxf5  h5  Ke7  Ke2  Kf8  Kf2  Ke8  Kf3  Kf8  Ke2  Kg8  Kd2  Kf8  Kc2  Kg8  Kb3  g6  h6  Kh8  Kc4  Kg8  Kd3  Kh8  Ke3  Kg8  Ke2  Kh8  Kf3  Kg8  Kg3  Kh8  Kg2  Kg8  Kg1  Kh7  Kf2  Kh8  d5  exd5
    53/55	00:08	    924,133k	109,976k	+0.19	Kb3  Kd7  Kb2  Kd8  b5  Ke8  b6  a5  Kc3  Kd8  Kd3  Ke8  Ke3  Kd7  f5  gxf5  h5  Ke7  Kd2  Kf8  Ke2  Kg8  Ke3  Kf8  Kf4  Kg8  d5  exd5  Kxf5  Kf8  Kg4  Kg8  Kf3  Kf8  Kf2  Ke7  Ke3  Kf8  Kf3  Kg8  Ke2  Kf8  Ke1  Ke7  Kd2  Kf8  Kc2  g6  h6  Kg8  Kb2  Kh8  Kc3  Kh7  Kd3
    54/58	00:18	  2,105,946k	115,401k	+0.14	Kb3  Kd7  Kc4  Ke8  Kd3  Kd7  Ke4  Kd8  Kf3  Ke8  Kg4  Kf8  Kg3  Ke7  Kh3  Ke8  Kh2  Ke7  Kg1  Kd7  Kf1  Kd8  Kf2  Ke8  Kf3  Ke7  Ke3  Kd7  Kd3  Ke8  Kc4  Kd8  Kc3  Ke7  Kb2  Kd8  Kc1  Ke8  Kb1  Kd8  Kb2  Kd7  Kb3  Ke7  Kc3  Kd8  Kd2  Ke8  Kc1  Kd8  Kd1  Kd7  Ke1  Ke8
    55/60+	00:27	  3,199,999k	116,563k	+0.22	f5
    55/60+	00:29	  3,338,870k	115,133k	+0.30	f5
    55/60+	00:42	  4,639,021k	109,883k	+1.18	f5
    55/60	00:52	  5,649,164k	107,270k	+1.61	f5  exf5  Kb3  Kd7  d5  Kd8  d6  Kc8  Kc4  Kd8  Kd3  Kc8  Ke3  Kd8  Kf2  Ke8  Kf3  Kd7  Ke2  Ke6  Kf2  a5  bxa5  Kd7  Kf3  Kd8  Ke3  Kd7  a6  bxa6  a5  Ke8  Kf4  Kd8  Kf3  Kd7  Kg3  Ke8  Kg2  Kd8  Kf2  Kd7  Kf3  Kd8  Kf4  Kc8  h5  gxh5  Kxf5  Kd7  g6  fxg6+  Kxg6  h4  Kf7
    56/33+	01:08	  7,330,823k	106,553k	+1.69	f5
    56/33+	01:14	  7,982,540k	107,583k	+1.77	f5
    56/89+	08:14	 54,836,363k	110,929k	+5.29	f5
    56/89	11:48	 77,727,501k	109,666k	+6.11	f5  exf5  Kb3  Kc7  Kc3  Kc8  d5  cxd5  Kd3  Kd8  b5  axb5  axb5  Ke7  Kd2  b6  cxb6  Kd7  Kd3  f4  Ke2  Kc8  Kf3  Kb8  Kxf4  Kb7  Kf3  Kc8  b7+  Kb8  Ke2  Ka7  b8R  Kxb8  Kf3  Ka7  Kg2  Kb7  h5  Kc8  Kf1  gxh5  g6  Kd8  gxf7  Ke7  f8Q+  Kxf8  e6  h4  b6  Ke7  Kf2  Ke8  b7
    57/29-	12:00	 78,896,281k	109,570k	+5.91	f5  exf5
    57/31+	12:55	 84,692,006k	109,213k	+6.11	f5
    57/35+	17:41	114,984,019k	108,364k	+6.66	f5
   12/16/2020 2:01:52 PM, Time for this analysis: 00:19:34, Rated time: 31:21

0 of 1 matching moves
Hmm...

[pgnn
[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "1-0"]
[FEN "2k5/1p3pp1/p1p1p1p1/2P1P1P1/PP1P1P1P/K7/8/8 w - - 0 1"]

1. f5 exf5 2. Kb3 Kd7 3. d5 f4 4. Kc3 cxd5 5. b5 axb5 6.
axb5 f3 7. Kd3 d4 8. b6 f2 9. Ke2 d3+ 10. Kxf2 Kc6 11. h5 gxh5 12. g6
fxg6 13. e6 d2 14. Ke2 h4 15. e7 d1=Q+ 16. Kxd1 Kd7 17. c6+ bxc6 18.
b7 Kxe7 19. Kd2 Kd6 20. b8=Q+ Ke6 21. Qe8+ Kd6 22. Qxg6+ Kd5 23. Qxg7
Ke4 24. Qg4+ Kd5 25. Kd3 Kd6 26. Ke4 Kc5 27. Qxh4 Kb6 28. Kd4 c5+ 29.
Kd5 c4 30. Qf6+ Kc7 31. Qc6+ Kb8 32. Qb6+ Kc8 33. Kc6 c3 34. Qc7# "1-0"

regards,

Zenmastur
Only 2 defining forces have ever offered to die for you.....Jesus Christ and the American Soldier. One died for your soul, the other for your freedom.
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Vinvin
Posts: 5222
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Hard positions posted for 6 last moonths

Post by Vinvin »

2 old positions that seems not so easy for some current engines :

Code: Select all

5r2/1p4r1/3kp1b1/1Pp1p2p/2PpP3/q2B1PP1/3Q2K1/1R5R b - - bm Rxf3;
r4rk1/1pp2ppp/2n5/p1b1p3/2N1P3/1BP1Bq2/PPQ2P1K/R4R2 b - - bm Ra6; id "MGV76-K: Psakhis
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mwyoung
Posts: 2727
Joined: Wed May 12, 2010 10:00 pm

Re: Hard positions posted for 6 last moonths

Post by mwyoung »

Vinvin wrote: ↑Tue Dec 29, 2020 12:53 am 2 old positions that seems not so easy for some current engines :

Code: Select all

5r2/1p4r1/3kp1b1/1Pp1p2p/2PpP3/q2B1PP1/3Q2K1/1R5R b - - bm Rxf3;
r4rk1/1pp2ppp/2n5/p1b1p3/2N1P3/1BP1Bq2/PPQ2P1K/R4R2 b - - bm Ra6; id "MGV76-K: Psakhis
The latest SF found both with ease.
"The worst thing that can happen to a forum is a running wild attacking moderator(HGM) who is not corrected by the community." - Ed Schröder
But my words like silent raindrops fell. And echoed in the wells of silence.
Top
Vinvin
Posts: 5222
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Hard positions posted for 6 last moonths

Post by Vinvin »

A new set found here : https://forum.computerschach.de/cgi-bin ... ?tid=11645

I downloaded the PGN file (75 games inside) and I removed the positions that are already in my set and the poor test positions.
There still some checking to see eveything is OK.
It stills 14 games :

[pgn] [Event "Teststellung Festung bauen"] [Site ""] [Date "????.??.??"] [Round ""] [White "TTT1.023"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [PlyCount "1"] [FEN "3rr1bk/6np/2p1n3/1pPpNpPp/pP1QpP1P/P2PP3/2K5/B7 w - - 0 1"] {In dieser schwierigen Situation findet Weiß eine erstaunliche Rettung mit} 1.Ng6+ {!!} 1...hxg6 2.Qxg7+ ( 2.Qf6 exd3+ 3.Kd2 ( 3.Kd1 Kh7 ) 3...d4 4. Qxg6 dxe3+ 5.Kxe3 Nf8+ {- +} ) 2...Nxg7 3.Bxg7+ Kxg7 4.d4 {und Weiß hat eine uneinnehmbare Festung errichtet und die Partie ist Remis.} 1/2-1/2 [Event "Teststellung"] [Site "'Nightmare 2' Testsuite"] [Date "????.??.??"] [Round ""] [White "Eigenmann"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "5B2/1p1nNp2/8/1P2R3/3p3q/8/p1K1P1Q1/k3b3 w - - 0 1"] 1.Ng6 {!! Das brilliante Springeropfer bereitet den Mattangriff vor. Der Läufer kommt nun mit tödlicher Wirkung auf die lange Diagonale. Der schwarze Bauer kommt nun auf die g-Linie und kann sich dann nicht mehr auf f6 stellen, um den weißen Läufer zu blockieren.} 1...fxg6 ( 1...d3+ 2.exd3 Qa4+ 3.Kc1 Qb3 4.Rxe1 Qc3+ 5.Kd1 Qxd3+ 6.Qd2 Qxd2+ 7.Kxd2+ Kb2 8. Bg7+ f6 9.Ra1 {!!} 9...Kxa1 10.Kc2 b6 11.Kc1 {! + - wäre eine phantastische Nebenlösung.} ) ( 1...Nxe5 2.Nxh4 ) 2.Re3 {!! Das brilliante Turmopfer soll den Bauern von der Diagonale weglocken .} 2... dxe3 ( 2...d3+ 3.exd3 Qa4+ 4.Kc1 ) 3.Bg7+ Nf6 4.Qg4 {!! Der herrliche K. O. - Schlag.} 4...b6 5.Bh8 {!! Zugzwang} 5...Bf2 6.Qb4 Qxb4 ( 6...Qe4+ 7. Qxe4 ) 7.Bxf6+ 1-0 [Event "Endspielstudie"] [Site "Einkerkerung"] [Date "????.??.??"] [Round ""] [White "V. Novikov 'Schach 64' 1913"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "7k/6R1/8/8/2P2P2/P7/pP6/3K3B w - - 0 1"] 1.Rh7+ {!! Brilliant gespielt. Der Turm opfert sich, um mit dem Läufer mit Tempogewinn nach e4 zu kommen, und dann...} 1...Kxh7 ( 1...Kg8 2.Bd5+ {!} 2...Kf8 ( 2...Kxh7 3.Be4+ {führt wieder zur Hauptvariante.} ) 3.Kc2 a1=Q 4.Rh1 Qa2 5.Rd1 Ke7 6.c5 {+ -} ) 2.Be4+ Kg7 3.Kc1 {!} 3...a1=Q+ 4.Bb1 {et voila`, die schwarze Dame ist eingesperrt und Weiß gewinnt leicht mit seinen beiden Freibauern.} 1-0 [Event "Broni 1970"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "ERET 019"] [Black "Endspiel L&L&S&S vs L&S&B"] [Result "*"] [SetUp "1"] [Annotator "Walter Eigenmann"] [PlyCount "13"] [Source "W. Eigenmann"] [SourceDate "2017.03.01"] [FEN "3kB3/5K2/7p/3p4/3pn3/4NN2/8/1b4B1 w - - 0 1"] 1.Nf5 ( 1.Nxd4 $2 Nd6+ 2.Kf8 Nxe8 3.Nxd5 Nd6 4.Nc3 Bf5 $11 ) 1...Ng5+ ( 1...d3 2.Bb6+ Kc8 3.Be3 $18 ) 2.Nxg5 Bxf5 3.Nf3 Bg4 ( 3...d3 4.Bb6+ Kc8 5. Bc6 $18 ) 4.Nxd4 Bh5+ ( 4...h5 5.Bh2 $18 ) 5.Kf8 Bxe8 ( 5...Bg4 6.Bh2 $18 ) 6.Ne6+ Kd7 7.Nf4 $18 * [Event "Teststellung Festung verhindern"] [Site ""] [Date "????.??.??"] [Round ""] [White "TTT1.079"] [Black ""] [Result "0-1"] [SetUp "1"] [PlyCount "1"] [FEN "6k1/1b2rr1p/4R1pP/3p1pP1/p1pPpK2/PpP5/1P6/2B3N1 b - - 0 1"] 1...e3 {!! Dieser stille Zug sichert Schwarz den Sieg, denn ein Turm kann nun über e4 ins weiße Lager einbrechen.} ( 1...Rxe6 2.Be3 {wäre Remis, Weiß hat eine uneinnehmbare Festung errichtet. Bluefish zeigt hier sofort die Bewertung 0.00.} ) 2.Rxe7 Rxe7 3.Bxe3 Re4+ 4.Kf3 f4 {! Das positionelle Bauernopfer macht eine Diagonale für den Läufer auf!} 5.Bxf4 Re1 ( 5...Bc8 ) 6.Ne2 Rb1 7.Bc1 Bc8 8.Kf4 Bf5 9.Ke3 Bd3 {- +} 0-1 [Event "Teststellung Rettung ins Patt"] [Site ""] [Date "????.??.??"] [Round ""] [White "TTT1.088"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [PlyCount "1"] [FEN "1k6/6Bq/b6p/2p2p2/1pPp3r/pP1Pb3/P1K3Q1/6Rr w - - 0 1"] 1.Be5+ {! Der Auftakt zu einer phantastischen Rettung.} 1...Ka7 2.Bb8+ {!! } 2...Kb6 ( 2...Kxb8 3.Qa8+ {!!} 3...Kxa8 4.Rg8+ Ka7 5.Rg7+ Kb6 6.Rg6+ Ka5 7.Rxa6+ Kxa6 ) 3.Ba7+ {!!} 3...Ka5 4.Bb6+ {!!} 4...Kxb6 5.Qg6+ Qxg6 6. Rxg6+ Ka7 7.Rxa6+ {! = ; der Turm verfolgt den König jetzt mit Schach. Sobald er geschlagen wird, ist es Patt.} 1/2-1/2 [Event "Testposition"] [Site "Festung aufbrechen"] [Date "????.??.??"] [Round "?"] [White "W"] [Black "B"] [Result "1-0"] [SetUp "1"] [FEN "3k4/3p1p1p/p1pPpPpP/PpP1P1P1/1P6/5R1K/3rBB2/4nR2 w - - 0 1"] 1.Bxb5 {!! Nur so kann Weiß die schwarze Stellung aufbrechen und das Remis vermeiden.} ( 1.Bxe1 Rxe2 {=} ) ( 1.Rxe1 Rxe2 {! und Remis, Weiß hat keine Möglichkeit mehr, die schwarze Festung zu knacken.} 2.Rxe2 Ke8 {=} ) 1...axb5 ( 1...Nxf3 2.Bxa6 Rb2 ( 2...Nxg5+ 3.Kg4 Ne4 4.Be1 Rd4 5.Kf3 ) 3.Bg3 Rb3 4.Ra1 Rxb4 5.Be1 Rb3 6.Kg4 Nxe5+ 7.Kf4 Nd3+ 8.Bxd3 Rxd3 9.a6 ) 2.Bxe1 Ra2 3.Bc3 Kc8 4.Ra1 Rxa1 5.Bxa1 Kb7 6.Ra3 Ka6 7.Bb2 Kb7 8. a6+ Ka7 9.Bc3 Kb8 10.a7+ Ka8 11.Kg3 1-0 [Event "TCEC SEASON 18 SUPERFINAL"] [Site ""] [Date "2020.07.??"] [Round "65"] [White "Leela"] [Black "Stockfish"] [Result "*"] [SetUp "1"] [FEN "2rqr1k1/pp1bbp1p/4p1pB/4P3/1nQpN3/P4N2/5PP1/3RR1K1 w - - 0 21"] 21.Qxb4 {!! LEELA spielt hier eines der bemerkenswertesten Damenopfer der Schachgeschichte.} 21...Bxb4 22.axb4 f5 ( 22...Rc4 23.Nf6+ Kh8 {und hier sichert sich Weiß die Initiative mit} 24.Ng5 {!!} ( {Weniger klar wäre} 24.Re4 {!?} 24...Qc7 {! und Schwarz verteidigt sich, es könnte weitergehen mit} ( {Schlecht wäre dagegen} 24...Rxb4 {?} 25.Rexd4 {!} ( 25.Rdxd4 a5 ) 25...Rxd4 26.Rxd4 {und Weiß, obwohl er für die Dame nur zwei Leichtfiguren hat steht er hier klar besser.} 26...Re7 ( 26...Bc6 27.Rxd8 Rxd8 28.Ng5 {+/-} ) 27.Rh4 Be8 28.Bg5 Qd1+ 29.Kh2 h5 30.Nxh5 gxh5 31.Rxh5+ Kg7 32.Bf6+ Kg6 33.Rg5+ Kh7 34.Rg7+ Kh6 35.Rg8 {!! + -} ) 25.Rh4 ( 25.Ng5 Ba4 26.Rh4 Rd8 ( 26...Bxd1 {??} 27.Nxe8 {+ -} ) 27.Bg7+ Kxg7 28. Nxe6+ {!} ( 28.Rxh7+ {??} 28...Kf8 29.Nxe6+ Ke7 30.Nxc7 Rxc7 {- +} ) 28... fxe6 29.Rxh7+ Kf8 30.Rh8+ Ke7 31.Rh7+ Kf8 32.Rh8+ Kg7 {=} ) 25...d3 26.Ng5 Re7 27.f4 d2 28.Rxd2 Rc2 29.Bg7+ Kxg7 30.Rxh7+ Kf8 31.Rh8+ Kg7 32.Rh7+ {=} ) 24...Re7 25.Rd3 {!} 25...Qc7 ( 25...Qc8 26.Ngxh7 Rc3 27.Rxd4 Rc4 28.Rd3 {!} ( 28.Rd6 Ba4 ) 28...Rc3 29.Rd6 {!} 29...Ba4 30.Re4 Rc4 31.Rxc4 Qxc4 32.Rd8+ Be8 33.Ng5 {+ -} ) ( 25...Qb6 26.Rh3 Qxb4 27.Rf1 {+ -} ) 26.Ngxh7 {+ -} ) 23.Nf6+ Kh8 24.Rxd4 Rc7 25.Red1 Re7 26.b5 b6 27.Kh2 {! Ein sehr guter Zug, der den König prophylaktisch vor Schachgeboten auf der Grundreihe schützt.} 27...Rb7 ( 27...g5 28.Nxg5 ) 28.Ng5 {! +/- mit der überlegenen Stellung für Weiß.} * [Event "Junior Tournament"] [Site "Schilde 1970"] [Date "????.??.??"] [Round ""] [White "A. Petrosian"] [Black "Hasaj"] [Result "1/2-1/2"] [SetUp "1"] [FEN "2k5/q1p5/3p4/pPpPp1pp/N1P1Pp2/P4PbP/KQ4P1/8 b - - 6 45"] 45...Qb6 {!! Damit will Schwarz eine uneinnehmbare Festung errichten.} 46. Nxb6+ ( {Die einzige Alternative wäre der Versuch, den Bauern a5 zu erobern, indem Weiß seine Dame zurück opfert, zum Beispiel} 46.Qd2 Kd7 47.Kb3 Kc8 ( 47...Qa7 48.Nb2 Kc8 49.Ka4 Kb7 50.Nd3 Kb6 ( 50...Qb6 51. Qxa5 Qxa5+ 52.Kxa5 Bh2 53.h4 gxh4 54.Nf2 Bg1 55.Nh3 Bh2 56.Ng5 {+/-} ) 51. Nxe5 {!!} 51...dxe5 52.Qb2 Qa8 53.Qxe5 Qd8 54.Qe6+ ) 48.Nxb6+ ( 48.Nb2 Kb7 49.Ka4 Qa7 50.Qxa5 Qxa5+ 51.Kxa5 Bf2 52.Nd3 Bd4 53.Ka4 Kb6 54.Kb3 Ka5 55. Nc1 Bf2 ) 48...cxb6 49.Ka4 {!} 49...h4 {? Ein entscheidender Tempoverlust. Es sieht so aus, als ob Schwarz seine Festung errichtet hat, aber hier kann Weiß doch einbrechen mittels} ( 49...Kb7 {! wäre der richtige Abwartezug, nun ginge das Damenopfer auf a5 nicht, denn nach} 50.Qxa5 {??} ( 50.h4 gxh4 51.Qc1 h3 {!} ( 51...Ka7 {??} 52.Qh1 {+ -} ) 52.gxh3 ( 52.Qh1 h2 ) 52...h4 53.Qd2 Ka7 {!, und wieder scheitert} 54.Qxa5+ bxa5 55.Kxa5 Be1+ {- +} ) 50...bxa5 51.Kxa5 {hätte Schwarz die Verteidigung} 51... Be1+ ) 50.Qxa5 {!!} 50...bxa5 51.Kxa5 Kb7 ( 51...Bf2 52.b6 Kb7 53.Kb5 Be1 54.a4 Bb4 55.a5 {+ -} ) ( 51...Be1+ {Kommt jetzt zu spät, weil der weiße König vormarschieren kann.} 52.Ka6 Kb8 53.Kb6 Bc3 54.a4 ) 52. b6 Be1+ 53.Kb5 {+ -} ) ( 46.Qe2 Kd8 47.Kb3 ( 47.Qf1 Kc8 48.Nb2 a4 49.Qd1 Qa5 50.Nxa4 Bf2 ) ( 47.Nxb6 cxb6 48.Kb3 h4 49.Ka4 Kc7 50.Qd2 Kb7 51.Qxa5 { ? scheitert nun an} 51...bxa5 52.Kxa5 Be1+ 53.Ka4 Kb6 {- + und hier würde Schwarz gewinnen.} ) 47...Kd7 48.Nb2 a4+ 49.Nxa4 Qa5 50.Nc3 Kc8 { oo/=} ) 46...cxb6 47.h4 gxh4 1/2-1/2 [Event "Rilton Cup Stockholm 2013/14"] [Site ""] [Date "????.??.??"] [Round ""] [White "Volkov"] [Black "Socko"] [Result "1-0"] [SetUp "1"] [FEN "rnb1r1k1/p2n1ppp/1p5q/2pp4/3P1NPP/P1PBPP2/3K4/R1B1Q2R w - - 1 16"] 16.Bg6 {!! Ein brilliantes Läuferopfer, das Schwarz in große Bedrängnis bringt.} 16...hxg6 17.g5 Qh7 18.h5 {!} 18...Kf8 19.hxg6 Qg8 20.Qg3 {! Schafft eine neue Drohung : Die Dame kommt nach d6.} 20...Bb7 {, und nun hätte} 21.Rh7 {! rasch gewonnen, etwa} 21...fxg6 22.Nxg6+ Kf7 23.Rh8 Qxh8 24.Nxh8+ Rxh8 25.Qc7 {+ -} 1-0 [Event "WM 1985 (14.)"] [Site "Moskau"] [Date "????.??.??"] [Round ""] [White "Karpow"] [Black "Kasparow"] [Result "1/2-1/2"] [SetUp "1"] [FEN "2r1k3/1p2qpp1/p2pb3/4p1P1/4P1n1/2P5/PP1B1P2/R2QK2B b Q - 2 18"] 18...Qf8 {!!} 19.Qf3 Qh8 20.Bg2 Qh4 21.b3 d5 {! =} 1/2-1/2 [Event "Tilburg"] [Site "Tilburg"] [Date "1991.??.??"] [Round "4"] [White "Short, N"] [Black "Timman, J"] [Result "1-0"] [SetUp "1"] [EventType "game"] [TimeMode "normal"] [FEN "4rrk1/1bpR1p2/1pq1pQp1/p3P2p/P1PR3P/5N2/2P2PP1/6K1 w - - 0 31"] 31.Kh2 $3 {<xml><:de>Eine schier unglaubliche Idee: Der K?nig will nach h6 marschieren, um dann auf g7 mattzusetzen!</:de></xml>} ( { <xml><:de>Fritz 9 analysiert</:de></xml>} 31.Rd3 $16 ) 31...Rc8 ( 31...Bc8 {<xml><:de>verliert ebenfalls sehenswert nach</:de></xml>} 32.Ng5 $3 ( { <xml><:de>Komplizierter w?re</:de></xml>} 32.g4 $5 hxg4 ( 32...Bxd7 33. gxh5 Kh7 34.Ng5+ Kg8 35.h6 $18 ) 33.Ng5 $1 g3+ $1 34.Kxg3 Bxd7 35.Kh2 $18 Qxa4 36.h5 $1 gxh5 37.Rh4 Qxc2 38.Ne4 $18 ) 32...Bxd7 {<xml><:de>und jetzt erst</:de></xml>} 33.g4 $18 hxg4 34.h5 $1 gxh5 35.Qh6 $18 ) ( 31...Qc5 32. Kg3 $1 Bxf3 ( 32...Bc6 33.Ng5 $1 Bxd7 34.Rxd7 Qxc4 35.Nxf7 $18 ) 33.gxf3 $1 ( 33.Kf4 $5 Bc6 $1 ( 33...Bd5 $2 34.Kg5 Qxd4 35.Kh6 Qd2+ 36.f4 $18 ) 34.Kg5 Qxe5+ $3 35.Qxe5 f6+ 36.Qxf6 Rxf6 37.Kxf6 Rf8+ 38.Kxe6 Bxd7+ 39. Kxd7 $16 ) 33...Re7 34.Qxe7 Qxe5+ 35.f4 Qe2 36.f5 $18 ) 32.Kg3 $1 Rce8 33. Kf4 Bc8 34.Kg5 {<xml><:de>Eine der sch?nsten Partien der 90er Jahre, die allerdings nicht ganz einzigartig war: Es gab eine Partie von Richard Teichmann gegen Amateure in Glasgow 1902, in der Teichmann mit einem ?hnlichen K?nigsmarsch bis nach h5 die Partie entschied!</:de></xml>} 1-0 [Event "Skopje"] [Site "?"] [Date "1967.??.??"] [Round "2"] [White "Fischer, R"] [Black "Geller, E"] [Result "0-1"] [SetUp "1"] [TimeMode "normal"] [FEN "3r1r1k/p3bPpp/2bp1n2/5R2/1q1BP3/1Bp5/PPP1Q1PP/1K1R4 w - - 0 19"] 19.Qf1 $3 {"Ein schwer zu findender Zug - er kostete mich 45 Minuten." Fischer Komodo 10.4 findet ihn auf dem Huawei Mate 9 in 6:15 min; Stockfish 10 in 4:37 min.} ( 19.bxc3 Qb7 {Mit der Idee 20... Tf7, 20... Le4 Geller} 20.Rdf1 Rxf7 21.g4 Rff8 22.g5 Nxe4 23.Rf7 {!} 23...Rxf7 24. Rxf7 Rg8 25.g6 {! +/-} ) ( 19.Bxc3 Qxe4 {Geller} 20.Qf1 Qxg2 21.Qxg2 Bxg2 22.Re1 Ne4 {wäre die Alternative, und nun ginge zum Beispiel} 23.Ba5 ( 23.Re2 {??} 23...Nxc3+ 24.bxc3 Bh3 {- +} ) 23...Rc8 24.Be6 Rb8 25.Bd5 Bf6 26.Bxe4 ( 26.Rxf6 Nxf6 27.Bxg2 Rxf7 ) 26...Rxb2+ 27.Kc1 Bxe4 28.Rxe4 ( 28. Bc3 {??} 28...Rxc2+ 29.Kd1 Bxf5 {- +} ) 28...Rb7 ( 28...Rxa2 {??} 29.Re8 { + -} ) 29.Bc3 Rbxf7 30.Bxf6 gxf6 31.Re6 Kg7 32.Rxd6 Rc8 {mit gleichem Spiel.} ) ( 19.Rxf6 Bxf6 20.Bxf6 gxf6 21.Qf2 Rxf7 {Geller} ) ( 19.g4 $5 { <xml><:de>Fritz 9 in 13:30, RT 15</:de></xml>} 19...Nxe4 ( 19...cxb2 20.g5 Nxe4 ) 20.Qe3 Nd2+ 21.Ka1 $1 d5 $1 ( 21...cxb2+ 22.Bxb2 $1 Nxb3+ 23.axb3 $16 Qe4 24.Qh6 $1 Qxg4 25.Rd3 $18 ) 22.bxc3 ( 22.Bxc3 $2 d4 $1 ) 22... Nxb3+ 23.cxb3 $18 ) 19...Nxe4 $8 {"Eine kämpferische Verteidigung." Fischer} ( 19...Nd7 20.Rh5 $1 Ne5 21.Qf5 $1 h6 22.Qe6 $1 ( 22.Qg6 $5 Bxe4 ( 22...Nxg6 $4 23.Rxh6# ) ( 22...Rxf7 23.Bxe5 $18 ) 23.Qxe4 Rxf7 ) 22... Kh7 23.Qxe7 Nxf7 24.Rf5 $18 ) ( 19...Rxf7 20.Bxc3 $18 ) ( 19...Bxe4 20. Rxf6 $18 ( 20.Rb5 $18 ) ) ( 19...Ng4 $2 {<xml><:de>war laut Fischer objektiv am besten, aber nach</:de></xml>} 20.Bxc3 ( 20.Rh5 Bd7 $1 ) 20... Qb7 ( 20...Qxe4 21.Rd4 $1 ) 21.Rh5 $1 {<xml><:de>h?tte Wei? siegreichen Angriff, etwa</:de></xml>} ( 21.Qf4 $40 ) 21...Bxe4 ( 21...Ne5 22.Qf5 h6 23.Qg6 $18 ) 22.Bd5 Bxd5 ( 22...Bxc2+ 23.Kxc2 Ne3+ 24.Kd3 Qxd5+ 25.Rxd5 Nxf1 26.Rxf1 Bf6 $2 27.Rxf6 $18 ) 23.Qf5 $1 h6 24.Rxd5 Nf6 25.Bxf6 ( 25.Rxh6+ $3 gxh6 26.Bxf6+ Bxf6 27.Qxf6+ Kh7 28.Rh5 $18 ) 25...Bxf6 26. Rxh6+ gxh6 27.Qxf6+ Kh7 28.Rh5 $18 {Murey} ) 20.a3 $2 {Dieser schreckliche - wenn auch naheliegende - Zwischenzug wirft die Partie weg.} ( {"Ein paar Stunden nach der Partie fiel mir ein, dass Weiß problemartig gewinnt nach } 20.Qf4 $18 {!! (mit der Drohung Tf5-h5). Schwarz hat keine vollwertige Verteidigung", meinte Fischer. Wir prüfen :} 20...cxb2 ( 20...Nd2+ 21. Rxd2 cxd2 22.c3 $3 Qxb3 $2 ( 22...Qb7 23.Bxg7+ $1 Kxg7 24.Qg4+ Kh8 25.Qd4+ $18 ) ( 22...Qc5 23.Kc2 $1 Bd7 ( 23...Qe5 $5 24.Rxe5 dxe5 25.Qxe5 Bf6 26. Qc5 $1 ( 26.Qxf6 $4 d1=Q+ $1 ) 26...Bxd4 27.cxd4 Rc8 28.Kxd2 Ba4 29.Qe7 Bxb3 30.axb3 Rcd8 31.Ke3 $18 ) 24.Bxc5 Bxf5+ 25.Qxf5 dxc5 26.Kd1 Rd6 27. Qe5 Rd7 28.Qe6 Rb7 29.Bc2 {<xml><:><nag>140</nag> 30.?f5 +- Geller</:></xml>} ) 23.Bxg7+ $1 Kxg7 24.Qg4+ Kh8 25.Qd4+ $18 ) ( 20...d5 $2 21.Qe5 $1 Nf6 22.Rxf6 Bxf6 23.Qxf6 $18 ) 21.Rh5 $1 Nf6 $1 ( 21...Bf6 $2 22.Qf5 $1 h6 23.Rxh6+ $1 gxh6 24.Qg6 $18 ) ( {Die kritische Variante wäre } 21...Nc3+ 22.Kxb2 Nxd1+ ( 22...Rxf7 {scheitert jetzt direkt an bei} 23. Qxf7 Nxd1+ 24.Kb1 $3 Qxd4 25.Rxh7+ $3 Kxh7 26.Qh5# ) 23.Kc1 Qxd4 $1 ( 23...Rxf7 $4 24.Bxf7 $18 ) 24.Qxd4 $16 d5 25.Qd3 h6 26.Rf5 Nc3 27.Qxc3 $18 ) 22.Rh6 $3 {<xml><:><nag>140</nag> 23.?f6</:></xml>} 22...Rxf7 $1 { <xml><:de>Noch die z?heste Verteidigung!</:de></xml>} ( 22...d5 $2 { <xml><:de>scheitert an</:de></xml>} 23.Rxf6 $1 Qxd4 ( 23...Rd6 24.Rxd6 Qxd6 25.Qxd6 Bxd6 26.Rf1 $18 {<xml><:><nag>140</nag> 27.?f6! +-</:></xml>} 26...Bxh2 $2 27.Bc5 $18 ) 24.Qxd4 Bxf6 25.Qxa7 d4 26.Rd2 Be4 27.Rf2 $1 Bg6 28.Qb6 $18 ) ( 22...Be4 23.Rxf6 $1 d5 24.Re6 $18 ) ( 22... Ne4 23.Rd3 $1 ( 23.Rxh7+ Kxh7 24.Qf5+ Kh6 ) 23...Qxd4 24.Rxd4 Bg5 25.Rxh7+ Kxh7 26.Qg4 Bh6 $6 ( 26...g6 27.Rxe4 Bxe4 28.Qxg5 d5 29.Kxb2 $16 ) 27.Rxe4 Bxe4 28.Qxe4+ g6 29.c3 d5 30.Bxd5 Rd6 31.Bb3 $1 Rd2 32.Bc2 $18 { <xml><:de>Stockfish DD, 2.1.2014</:de></xml>} ) 23.Bxf7 Be4 $1 24.Bb3 d5 { <xml><:de>und nun</:de></xml>} 25.Bxf6 Bxc2+ $1 ( 25...gxf6 26.Rxf6 $1 Qc3 $1 27.Rf7 $16 {<xml><:de>mit gewonnenem Endspiel, z.B.</:de></xml>} 27... Rc8 28.Qd2 Qxd2 ( 28...Qe5 29.Qd4 Qxd4 30.Rxd4 Bd6 31.Rxa7 Be5 32.Rd1 Bg7 33.a4 $18 ) 29.Rxd2 Bb4 30.Rd1 Bc3 31.Rd7 ( 31.Rxa7 $18 {wäre wohl am einfachsten.} ) 31...d4 ( 31...a5 32.Bxd5 $18 ) 32.Rxa7 Bxg2 33.Rg1 ( 33. Be6 $1 Rb8 34.Bc4 Be4 35.Rf1 h6 36.Bd3 Bxd3 37.cxd3 Re8 38.Rg1 $1 Re3 39. a4 Rxd3 40.Ra8+ Kh7 41.Rag8 $18 {<xml><:de>Houdini 1.5a</:de></xml>} ) 33...Be4 {und hier bestünde für Schwarz noch die Chance, eine Festung zu errichten. Weiß kann nun nur mühsam gewinnen, da die beiden Läufer doch stark sind, und zudem einmal d4-d3 droht} 34.Rc7 ( 34.h4 $2 d3 $17 ) 34... Rd8 35.Rd7 Rf8 36.Bc4 Bg6 37.Rf1 Re8 38.h4 Be4 39.h5 Bf5 40.Rf7 Be4 41.h6 $18 ) ( 25...Bxf6 26.Rxf6 $18 ) 26.Bxc2 Qxf4 27.Rxh7+ Kg8 28.Rxg7+ Kh8 29. Rh7+ Kg8 30.Rh8+ Kf7 31.Rxd8 Kxf6 ( 31...Ba3 {!} 32.Bxb2 Bxb2 {hätte Fischer vor die meisten Probleme gestellt.} ) 32.R8xd5 $16 { <xml><:en>w?re eine sch?ne Variante von Houdini 1.5a, 26.11.2013</:en></xml>} ) 20...Qb7 21.Qf4 Ba4 $19 {! "Das sah ich nicht. Zudem kam mir die Stärke dieser Ressource erst nach zwei weiteren Zügen voll zum Bewusstsein." Fischer} 22.Qg4 ( 22.Qh6 Bf6 23.Rxf6 Bxb3 $19 ( 23...Bxb3 24.Rxd6 ( 24.cxb3 Qxb3 25.Rf2 Qxd1+ {<xml><:><nag>140</nag> 26... ?d4 -+</:></xml>} ) 24...Ba2+ $19 {und der Vorhang fällt (Fischer).} ) ) 22...Bf6 $1 23.Rxf6 Bxb3 $1 {"Zu guter letzt sah ich die Pointe von Gellers Verteidigung." Fischer gab daher auf.} ( 23...Bxb3 $1 24.Rf4 ( 24.cxb3 Nxf6 $19 ) 24...Ba2+ $19 ) 0-1 [Event "Teststellung Mattangriff"] [Site ""] [Date "????.??.??"] [Round ""] [White "TTT1.011"] [Black ""] [Result "0-1"] [SetUp "1"] [PlyCount "1"] [FEN "1qrr1b2/6p1/ppkn1P2/3pP3/1PP5/2BP1pP1/BQ3P2/1RRN1n1K b - - 0 1"] 1...Be7 {!! Ein phänomenaler Zug. Die h-Linie wird zum Mattangriff freigemacht. Das Problem von Weiß ist, dass seine Figuren alle am anderen Ende des Bettes stehen, und dem König nicht zu Hilfe kommen können.} 2.fxe7 ( 2.fxg7 Rh8+ 3.Kg1 {sieht wie die Widerlegung aus, doch die Kombination mit dem doppelten Turmopfer funktioniert nun über einen kleinen Umweg :} 3...Rh1+ 4.Kxh1 Rh8+ 5.Kg1 Rh1+ 6.Kxh1 Qg8 {!!} 7. b5+ ( 7.Kg1 Qh7 8.b5+ Kd7 9.e6+ Kc7 ) 7...Kd7 8.e6+ {Aber nicht} 8...Qxe6 ( 8...Kc7 {??} 9.Bf6 {+ -} ) 9.g4 Qh6+ ) ( 2.b5+ Kb7 3.bxa6+ Ka8 4.Kg1 Rh8 5.fxg7 Rh1+ 6.Kxh1 Rh8+ 7.Kg1 Qg8 {!!} ( {Aber nicht} 7...Rh1+ {??} 8.Kxh1 Qg8 9.Kg1 ) 8.exd6 Rh1+ 9.Kxh1 Qh7+ 10.Kg1 Qh2+ 11.Kxf1 Qh1# ) 2...Rh8+ 3. Kg1 Rh1+ {!!} 4.Kxh1 Rh8+ 5.Kg1 Rh1+ 6.Kxh1 Qh8+ 7.Kg1 Qh2+ 8.Kxf1 Qh1# 0-1 [/pgn]
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Vinvin
Posts: 5222
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Hard positions posted for 6 last moonths

Post by Vinvin »

Vinvin wrote: ↑Tue Dec 29, 2020 4:15 am ... I removed the positions that are already in my set and the poor test positions.
There still some checking to see eveything is OK.
Same process for the set Chichitza from here : http://chichitza.ro/index.html?lang=en&intro=4

It stills 7 games.

Game #5 has been modified : the first move has been removed because it's forced. Now the game starst with 1.Nc7!

[pgn] [Event "White to move and draw"] [Site "Glarean"] [Date "03.2011"] [Round "Stubbornness"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [Variant "From Position"] [FEN "8/b4kp1/2p1p3/5pB1/p1PP4/1p6/3K1P2/3N4 w - - 0 1"] [SetUp "1"] 1. Kc3! (1. c5 a3 2. Kc3 a2 3. Kb2 e5 4. dxe5 Bxc5 5. Bd2 Bd4+ 6. Bc3 c5 { winning for Black }) (1. Kd3 e5 { winning for Black }) (1. Be3 f4 { winning for Black }) 1... Bxd4+ { decoy for the king } 2. Kxd4 (2. Kb4 b2 3. Nxb2 Bxb2 { winning for Black }) 2... b2 { sacrificing one pawn in order to promote the other } 3. Nxb2 { the king is still in the square of the a-pawn, but the knight is now blocking the path... } 3... a3 4. Nd3 { White can do nothing about the promotion, but can arrange for a stubborn defense } 4... a2 5. Ne5+ Ke8 6. f4 { All pieces are protected and the black king is confined to squares around h8... well, the queen cannot mate all by herself. } 1/2-1/2 [Event "White to move and draw"] [Site "Pat-a-Mat"] [Date "04.2019"] [Round "Blind Alley"] [White "Mihai Neghina"] [Black "Mário Kamody"] [Result "1/2-1/2"] [FEN "8/b7/3p2b1/5p1n/5Pk1/4P1p1/B5P1/R4K2 w - - 0 1"] 1. Ke2 (1. Bf7 Bxf7 2. Rxa7 Bc4+ {-+}) (1. Rd1 Bxe3 2. Rxd6 Nxf4 {-+}) 1... Bxe3 (1... Nxf4+ 2. exf4 Kxf4 3. Rh1 {==}) 2. Kxe3 Nxf4 3. Rg1 Nxg2+ 4. Rxg2 f4+ 5. Ke2 f3+ 6. Kf1 fxg2+ 7. Kg1 {(==) reaching the key position; the next ~10 moves are not forced, but are necessary for setting up the only try for Black: d5 } Be4 8. Bd5 Kf5 9. Bc6 Kf4 10. Bd5 Ke5 11. Bc6 Bd5 12. Bb7 Ke4 13. Bc8 Bc6 14. Be6 Ke5 15. Bb3 Bd7 16. Ba2 {!} (16. Kxg2 Kf4 {-+}) (16. Bc4 {or Bg8 or Bf7} Be6 17. Ba6 d5 {-+}) 16... Be6 17. Bb1 d5 {d5 is enforced, but...} (17... Kd4 18. Kxg2 {== since the bK went too far}) 18. Kxg2 {g2 can be taken now} Kf4 {the king covers g3} 19. Ba2 {! the bishop pins d5} Bg8 20. Bb3 {... and maintains the pin} Bf7 21. Ba2 {==} 1/2-1/2 [Event "White to move and draw"] [Site "chichitza.ro"] [Date "09.2012"] [Round "Standstill"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [Variant "From Position"] [FEN "1N4K1/1pp1p3/7k/2r3pP/p2pp1P1/P6N/8/2B5 w - - 0 1"] [SetUp "1"] 1. Nc6 { Sacrificing the knight only to displace the b-pawn on the c-column } (1. Na6 { is not aggressive enough, Black has time for Rxc1, winning }) (1. Nd7 Rxc1 { winning for Black }) (1. Bd2 Rd5 { the only way to win for Black } 2. Nc6 { now it is too late to get back to the mainline drawing idea } 2... bxc6 3. Nxg5 Rd8+ 4. Kf7 e3 { winning for Black }) 1... bxc6 { forced, otherwise mate at move 9: } (1... Rxc1 2. Nxe7 Rf1 3. Kh8 Rf8+ 4. Ng8+ Rxg8+ 5. Kxg8 e3 6. Ng1 d3 7. Nf3 d2 8. Ne5 d1=Q 9. Nf7#) (1... Rxc6 2. Bxg5# { is the threat that keeps the rook from taking the knight }) 2. Nxg5 Rxg5+ (2... Rxc1 3. Nf7#) 3. Kh8 { Black now has the awkward privilege of choosing whether he prefers to stalemate White by capturing the bishop or to be stalemated by White after having pushed all pawns in the diagonal of death c1-h6... draw } 1/2-1/2 [Event "White to move and draw"] [Site "Schach"] [Date "09.2012"] [Round "Shelter"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [Variant "From Position"] [FEN "4B3/k1K1pp2/p3bq2/2p1p3/1p2P1P1/4P2Q/nR6/8 w - - 0 1"] [SetUp "1"] 1. g5 (1. Rd2 Nc3 { winning for Black }) 1... Qxg5 2. Qxe6 (2. Qh8 Qf6 3. Rh2 (3. Qxf6 exf6 4. Rd2 b3 5. Rd8 Nc3 6. Bc6 Nb5+ 7. Bxb5 axb5 { winning for Black }) 3... Qxh8 4. Rxh8 Nc3 5. Bc6 Nb5+ 6. Bxb5 axb5 7. Rb8 b3 8. Rxb5 Ka6 9. Rxc5 Bg4 { winning for Black }) 2... fxe6 3. Rxa2 Qg8 (3... Qxe3 4. Bb5 Qa3 5. Rxa3 bxa3 6. Bc4 { winning for White }) 4. Ra4 { or Ra5, but keeping the a1 square cleared } (4. Ra1 Qf8 5. Ra5 Qf1 6. Bb5 Qxb5 7. Rxb5 axb5 { winning for Black }) 4... Qf8 5. Ra1 (5. Ra2 { or Ra5 } 5... Qf1 { winning for Black }) 5... b3 (5... c4 6. Ra4 c3 7. Rxb4 Qxe8 8. Rb7+ Ka8 9. Ra7+ Kxa7 { stalemate }) 6. Ra3 b2 7. Rb3 b1=Q 8. Rxb1 Qxe8 9. Rb7+ Ka8 10. Ra7+ Kxa7 { stalemate } 1/2-1/2 [Event "White to move and win"] [Site "chichitza.ro"] [Date "11.2012"] [Round "Chase"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [FEN "4N2k/4PB1p/7P/2p5/2P5/2rq2Pp/1P3P1K/8 w - - 0 1"] 1.Nc7 $1 ( 1.Nd6 $2 {or 2. Nf6? or 2.Ng7?} 1...Qxg3+ 2.fxg3 Rc2+ 3.Kxh3 ( 3.Kg1 h2+ 4.Kh1 Rc1+ 5.Kxh2 Rh1+ ) 3...Rh2+ 4.Kg4 Rh4+ {draw by perpetual check} ) ( 1.bxc3 $2 Qf1 {winning for Black} ) 1...Qxg3+ ( 1...Qd7 {or Qe2 or Qe4} 2.e8=Q+ Qxe8 3.Bxe8 {winning for White} ) 2.fxg3 Rc2+ 3.Kxh3 Rh2+ 4.Kg4 Rh4+ 5.Kf5 Rf4+ ( 5...Rh5+ 6.Bxh5 Kg8 7.e8=R# ) 6.Ke5 Re4+ 7.Kd5 ( 7.Kd6 $2 Re6+ 8.Kd5 Rd6+ 9.Ke4 ( 9.Kxc5 Rc6+ {draw} ) 9...Re6+ 10.Kf3 Rxe7 {draw} ) 7...Re5+ 8.Kc6 Re6+ 9.Kb7 ( 9.Kxc5 $2 Rc6+ {draw} ) 9...Rb6+ 10.Kc8 Rb8+ 11.Kd7 {capturing the rook with checkmate or releasing the stalemate threat with a decisive advantage} 1-0 [Event "White to move and draw"] [Site "Componist"] [Date "12.2012"] [Round "Desperation"] [White "Mihai Neghina"] [Black "---"] [Result "1/2-1/2"] [Variant "From Position"] [FEN "2b5/1pr4p/3bp1pk/1p6/1PpN2PP/K1P1n3/P3N1R1/3R4 w - - 0 1"] [SetUp "1"] 1. Nxb5 { Other moves lead to normal positions with Black being a pawn ahead. -+ } (1. Rgg1 Nxd1 2. Rxd1 Rf7 3. Nxb5 Bh2 { -+ }) (1. Rd2 Nxg2 2. Nxb5 e5 3. g5+ Kh5 { -+ }) (1. Rdg1 Nxg2 2. Rxg2 Bd7 { -+ }) (1. g5+ Kh5 2. Rdg1 Nxg2 { -+ }) 1... Nxd1 (1... Nxg2? 2. Rxd6 Re7 (2... Rg7 3. Na7 Bd7 4. Rb6 Be8 5. Nd4 { +- }) 3. Na7 Bd7 4. Rb6 Be8 5. Nd4 Nxh4 6. Nc8 Rc7 7. Nd6 Bc6 8. Nxe6 Re7 9. Nd4 Rd7 10. Nxc6 Rxd6 11. Rxb7 Rxc6 12. b5 { +- }) 2. Nxd6 (2. g5+? Kh5 3. Nxd6 Rc6 4. Nxb7 Bxb7 { -+ }) 2... b5 (2... e5 3. Rg1 Nf2 4. Rg2 Nd3 5. Ka4 { = }) (2... Rc6 3. Nf7+ Kg7 4. b5 Rb6 5. Kb4 Ne3 (5... Kxf7 6. Kc5 { +- }) 6. Rf2 { or Rg3 = }) (2... b6 3. Nxc8 Rxc8 4. Ka4 { = }) 3. g5+ { This move order does not work: } (3. Nxc8? Rxc8 4. g5+ Kg7 5. Nd4 Ra8#) 3... Kh5 (3... Kg7? 4. Ne8+ Kf7 5. Nxc7 { +- }) 4. Nxc8 { This move order does not work: } (4. Nf4+ Kxh4 5. Nxc8 e5 { -+ }) 4... Rxc8 5. Nf4+ Kxh4 6. Nxg6+ Kh3 7. Nf4+ Kh4 8. Ng6+ { Draw request 1: Knight checks } 8... hxg6 9. Rg4+ Kh3 10. Rg3+ Kh2 11. Rg2+ Kh1 12. Rg1+ Kh2 13. Rg2+ Kh3 14. Rg3+ Kh4 15. Rg4+ Kh5 16. Rh4+ Kxg5 17. Rg4+ { Draw request 2: Rook checks } (17. Rh5+? Kf4 18. Rf5+ Ke3 19. Re5+ Kf2 20. Rf5+ Ke2 21. Re5+ Ne3 { -+ }) 17... Kf6 18. Rf4+ (18. Rxg6+? Kf5 19. Rf6+ Kg4 20. Rg6+ Kf3 21. Rf6+ Ke2 22. Rxe6+ Ne3 { -+ }) 18... Kg7 (18... Ke7 19. Rf8 (19. Rf7+? Kd6 20. Rd7+ Ke5 21. Rd8 Nxc3 22. Rxc8 Kd4 { -+ }) 19... Rxf8 { stalemate } (19... Rc6 20. Re8+ Kf7 21. Rxe6 Rc8 22. Re8 Rc6 23. Re6 { = }) (19... g5 20. Rxc8 Nxc3 21. Kb2 Nd5 22. Rb8 g4 23. a3 c3+ 24. Kb3 Kf7 25. Rxb5 g3 26. Rb7+ Kf6 27. Rb8 Kf7 28. Rb7+ Kf6 { = }) (19... Nxc3 20. Rxc8 g5 { transposing to the previous variation = }) (19... Rc5 20. Rc8 Rd5 21. Re8+ Kf6 (21... Kd6 22. Rd8+ Ke5 23. Rxd5+ { = }) 22. Rxe6+ Kg5 23. Re5+ Kf4 24. Rxd5 Nxc3 25. Rd8 g5 26. Kb2 Na4+ 27. Kc2 g4 28. Rf8+ Ke4 29. Rb8 g3 30. Rxb5 g2 31. Rg5 Kf3 32. Rg8 Kf2 33. Rf8+ Kg3 34. Rg8+ Kh2 35. Rh8+ Kg1 36. Rg8 { = })) 19. Rf8 (19. Rf7+ { ? } 19... Kh6 20. Rf8 Rc6 21. Rh8+ Kg5 22. Rh5+ Kg4 23. Rg5+ Kf3 24. Rg3+ Ke2 25. Rg2+ Nf2 { -+ }) 19... Rc6 (19... Rc5 20. Rc8 { similar to a previous variation }) 20. Rg8+ (20. Rf7+? Kh6 21. Rh7+ Kg5 22. Rh5+ Kf4 23. Rf5+ Kg3 24. Rg5+ Kf3 25. Rf5+ Ke2 26. Re5+ Ne3 { -+ }) (20. Ra8? Nxc3 { -+ }) 20... Kf6 (20... Kh6 21. Rxg6+ { = }) 21. Rxg6+ Kf5 22. Rxe6 (22. Rf6+ { the same drawing idea } 22... Kg4 23. Rg6+ (23. Rf4+? Kg3 24. Rf3+ Kg2 25. Rg3+ Kf2 26. Rg2+ Kf3 27. Rg3+ Ke2 { -+ }) 23... Kf3 24. Rf6+ (24. Rg3+? Ke2 { -+ }) 24... Kg2 25. Rg6+ Kf1 26. Rxe6 (26. Rg1+ Ke2 27. Re1+ Kd3 28. Rxd1+ Kxc3 29. Rd6 { the same drawing idea }) 26... Rc7 27. Re7 Rc8 28. Re8 { repetition } 28... Rxe8 { or stalemate... }) 22... Rc7 23. Re7 Rc8 24. Re8 { Draw request 3: Rook versus Rook } 24... Rxe8 { stalemate... } 1/2-1/2 [Event "White to move and win"] [Site "Glarean"] [Date "10.2015"] [Round "Harassment"] [White "Mihai Neghina"] [Black "---"] [Result "1-0"] [Variant "From Position"] [FEN "8/q1p1N1p1/3p1p1p/pk5P/1p2BB2/8/PK3P2/8 w - - 0 1"] [SetUp "1"] 1. Be3 (1. Bd3+ { ? } 1... Ka4 2. Be3 Qb7 3. Bg6 (3. Nf5 { ? } 3... b3 4. a3 Qd5 5. Nd4 c6 6. Be2 Qc5 7. Bd1 Qxa3+ { -+ }) 3... Kb5 4. Bd3+ Ka4 { = }) (1. Bc6+ { ? } 1... Kc4 2. Be3 Qb8 3. Bf3 { threatening Be2# } 3... Kd3 4. Ng6 { threatening Nf4+ Be2# } (4. Nd5 { similar to 4.Ng6 }) 4... Kc4 5. Ne7 { = } (5. Nf4 { ? } 5... Kb5 6. Be2+ Kc6 { -+ })) 1... c5 (1... Qb8 2. Bd3+ Ka4 3. Nc6 Qb7 4. Nd4 Qd5 5. Bc2+ b3 6. Bxb3+ { +- }) 2. Bd3+ (2. Bc6+ { ? } 2... Kc4 { -+ }) 2... Ka4 (2... Kb6 3. Nc8+ { +- }) (2... c4 3. Bxc4+ Kxc4 4. Bxa7) 3. Nd5 (3. Bc2+ { ? } 3... Kb5 (3... b3 { ? } 4. axb3+ Kb5 5. Bd3+ Kb6 6. Nc8+ { +- }) 4. Bd3+ Ka4 { = }) 3... Qb7 (3... f5 4. f4 Qb7 5. Bc4 Qb8 6. Bf2 Qd8 7. Bh4 Qb8 (7... Qxh4 8. Nb6#) 8. Be7 Qb7 9. Bd8 Qa7 10. Nc7 { +- }) (3... Qb8 { similar to 3...Qb7 }) 4. Bc4 Qb8 { Black's best defense is passive, trying not to create any weaknesses while the queen keeps b6 guarded. } 5. Bc1 { The bishop cannot break Black with sheer force (sacrifice), nor can he sneak around the defense. It's therefore the king's turn to attempt a siege. But in the meantime, a3 must be protected to keep the black king cornered and to prevent b3 breakthroughs. } (5. Bf4 Qd8 6. Bg3 Qb8 { keeping both b6 and d6 defended }) 5... Qd8 6. Kc2 (6. Kb1 Qb8 7. f3 Qd8 8. Nf4 Qc8 9. Nd3 Qf5 10. Ka1 Qxf3 11. Nb2+ Ka3 12. Be6 Qc3 13. Kb1 { +- }) 6... Qb8 7. Bb2 Qa7 8. f3 { defending g4 } (8. f4 { ? } 8... Qb8 9. Kd3 Qa7 10. Ke4 Qb8 11. Kf5 (11. Kf3 Qd8 12. Kg4 Qc8+ 13. Kg3 { = }) 11... Qc8+ 12. Kg6 Qb7 13. Kh7 { ? } 13... g5+ 14. Kxh6 g4 15. Kg6 g3 16. Bc1 (16. h6 g2 17. h7 g1=Q+ { -+ }) 16... g2 17. Be3 Qb8 18. Kg7 (18. Kf7 b3 19. axb3+ Ka3 20. h6 Qh8 21. f5 Qh7+ 22. Kxf6 g1=Q 23. Bxg1 Qxh6+ 24. Ke7 Qg7+ 25. Kxd6 Qxg1 26. f6 Qg3+ 27. Kxc5 a4 28. bxa4 Kxa4) 18... b3 19. axb3+ Ka3 20. h6 Qe8 21. h7 Qxe3 22. Nxe3 g1=Q+ 23. Kf7 Qh1 24. Kg7 Qg1+ 25. Kf7) (8. Kd3 { The king move is not terrible by itself, but without f3 it is a draw. } 8... Qb7 9. Ke4 Qb8 10. Kf4 Qd8 11. Kf5 Qc8+ 12. Kg6 Qg4+ 13. Kh7 Qxc4 14. Nb6+ Kb5 15. Nxc4 Kxc4 16. Kxg7 b3 17. axb3+ Kxb3 18. Bxf6 (18. Bc1 c4 19. Kxh6 c3 20. Kg6 a4 21. h6 a3 22. Bxa3 Kxa3 23. h7 c2 24. h8=Q c1=Q { = }) 18... d5 19. Kxh6 d4 20. Kg6 d3 21. Bg5 c4 22. h6 c3 23. h7 d2 24. h8=Q d1=Q { = }) 8... Qb7 9. Kd3 Qa7 10. Ke4 Qb7 11. Kf5 Qd7+ 12. Kg6 Qb7 13. Kh7 { the g5+ trick does not work, as the f-pawn can intercept } 13... Qa7 14. Kg8 Qb7 15. Kf8 Qa7 16. Ke8 Qb7 17. Kd8 Qa7 18. Kc8 Qa8+ 19. Kd7 Qb8 (19... Qb7+ 20. Nc7 b3 21. a3 Qb6 22. Nd5 { threatening Nc3# } 22... Qb5+ 23. Bxb5+ Kxb5 24. Kxd6 { +- }) 20. Nc7 b3 21. a3 Qb7 22. Bd5 Qxd5 23. Nxd5 Kb5 24. Kxd6 { 1-0 Black resigns. } 1-0 [/pgn]
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Paloma
Posts: 1163
Joined: Thu Dec 25, 2008 9:07 pm

Re: Hard positions posted for 6 last moonths

Post by Paloma »

Dann Corbit wrote: ↑Wed Dec 16, 2020 1:14 pm There is a new batch coming and some of them are beauties
Thank you,
when coming this batch?
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Dann Corbit
Posts: 12478
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Hard positions posted for 6 last moonths

Post by Dann Corbit »

Fairly soon, but we will sell no wine before its time
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
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Vinvin
Posts: 5222
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Hard positions posted for 6 last moonths

Post by Vinvin »

A pawn endgame from here : http://talkchess.com/forum3/viewtopic.p ... 44#p879044

a4!
[d]8/1p6/4k1pp/p1p1p3/4P3/1PP4K/P2P3P/8 b - - bm a4;
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