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4 old zugzwangs where modern engines still have troubles

Posted: Tue Jul 12, 2016 6:31 pm
by Vinvin
Selection from http://www.stmintz.com/ccc/index.php?id=392369

[d]6k1/3p4/P2P4/8/5Kp1/1p4Q1/p5p1/b7 w - - bm Qxg2
; c0 "Kasparyan 1959, 1 ... Be5+ 2 Kf5! a1/Q 3 a7! Qxa7 4 Kg6! Qa1! 5 Qd5! Kh8 6 Qe4!!, white wins"; id "ZPTS.14";


[d]8/6B1/p5p1/Pp4kp/1P5r/5P1Q/4q1PK/8 w - - bm Qxh4+
; c0 "CCC post 10.9.2004 by Alvaro Begue"; id "ZPTS.18";


[d]8/8/8/1B6/6p1/8/4KPpp/3N2kr w - - bm Kd3
; c0 "CCC post by Tim Foden, id MES.831, white wins, 1. Kd3 g3 2. f4 Kf1 3. Kd2+ Kg1 4. Bd7 Kf1 5. Bh3 Rg1 6. Bg4 Rh1 7. Be2+ Kg1 8. Nc3 Kf2 9. Ne4+ Kg1 10. Ng5 Kf2 11. Nh3#"; id "ZPTS.21";


[d]8/p5pq/8/p2N3p/k2P3P/8/KP3PB1/8 w - - bm Be4
; c0 "Kubbel 1925, 1.Be4!! Qh6 2.Bd3!! Qd2 [2...Qd6 3.b3#] 3.Be2 g6 [3...Qc2 4.Bd1 Qxd1 5.Nc3 -; 3...a6 4.f3 g6 5.f4 -] 4.f3 a6 5.f4 Qc2 6.Bd1, Zugzwang after f4, white wins"; id "ZPTS.28";

Re: 4 old zugzwangs where modern engines still have troubles

Posted: Tue Jul 12, 2016 9:39 pm
by F. Bluemers
Well,maybe not.
Dirty beta,single core on fx8350 (3.7 Ghz)
[d]6k1/3p4/P2P4/8/5Kp1/1p4Q1/p5p1/b7 w - - bm Qxg2

Code: Select all

19	+7.37 	17.0M  	0:10.35	Qxg2 Be5+ Kf5 a1=Q a7 Bxd6 a8=Q+ Qxa8 Qxa8+ Kf7 Kxg4 Ke7 Qe4+ Kd8 Qb1 Kc7 Qxb3 Bc5 Qd5 d6 Qe4 Kb6 Kf4
 18	+7.40 	14.2M  	0:08.73	Qxg2 Be5+ Kf5 a1=Q a7 Bxd6 a8=Q+ Qxa8 Qxa8+ Kf7 Kxg4 Ke7 Qe4+ Kd8 Qb1 Kc7 Qxb3 Bc5 Qd5 d6 Qe4 Kd7 Qb7+ Ke6 Qe4+ Kd7
 18	+7.40 	12.9M  	0:08.01	Qxg2 Be5+ Kf5 a1=Q a7 Bxd6 a8=Q+ Qxa8 Qxa8+ Kf7 Kxg4 Ke7 Qe4+ Kd8 Qb1 Kc7 Qxb3 Bc5 Qd5 d6 Qe4 Kd7 Qb7+ Ke6 Qe4+ Kd7
 17	+7.18 	11.0M  	0:06.84	Qxg2 Be5+ Kf5 a1=Q a7 Bxd6 a8=Q+ Qxa8 Qxa8+ Kf7 Kxg4 b2 Qa2+ Kf6 Qxb2+ Be5 Qb1 d6 Qf5+ Ke7 Kf3 Bf6 Qe4+ Be5
 17	+7.18 	10.0M  	0:05.89	Qxg2 Be5+ Kf5 a1=Q a7 Bxd6 a8=Q+ Qxa8 Qxa8+ Kf7 Kxg4 b2 Qa2+ Kf6 Qxb2+ Be5 Qb1 d6 Qf5+ Ke7 Kf3 Bf6 Qe4+ Be5
 17	+3.75!	7.84M  	0:04.84	Qxg2 Be5+ Kf5 a1=Q a7 Qxa7 Kg6 Qa1 Qd5+ Kh8 Qe4 Qb1 Qxb1 g3 Qxb3 Bxd6 Qb2+ Kg8!
 17	+2.50 	7.84M  	0:04.29	a7 Be5+ Kf5 Bxg3 a8=Q+ Kg7 Qa7 g1=Q Qxg1 Bxd6 Qxg4+ Kf8 Qd4 Ba3 Qh8+ Kf7 Qc3 Ke7 Qg7+ Ke8 Qe5+ Kf7 Qe7+ Kxe7 Kg6
 16	+2.26 	7.21M  	0:03.95	a7 Be5+ Kf5 Bxg3 a8=Q+ Kg7 Qa7 g1=Q Qxg1 Bxd6 Qxg4+ Kf8 Qd4 Ba3 Qh8+ Ke7 Qa1 Kd6 Qc3 Bc5
 16	+2.26 	6.96M  	0:03.81	a7 Be5+ Kf5 Bxg3 a8=Q+ Kg7 Qa7 g1=Q Qxg1 Bxd6 Qxg4+ Kf8 Qd4 Ba3 Qh8+ Ke7 Qa1 Kd6 Qc3 Bc5

[d]8/6B1/p5p1/Pp4kp/1P5r/5P1Q/4q1PK/8 w - - bm Qxh4+

Code: Select all

16	+4.98 	1.20M  	0:00.87	Qxh4+ Kxh4 Bf6+ g5 Bc3 Qf2 Be5 Qg1+ Kxg1 g4 f4 g3 f5 Kg5 f6 Kg6 Kf1 h4 Ke2
 16	+4.98 	1.00M  	0:00.75	Qxh4+ Kxh4 Bf6+ g5 Bc3 Qf2 Be5 Qg1+ Kxg1 g4 f4 g3 f5 Kg5 f6 Kg6 Kf1 h4 Ke2
 15	+4.82 	966829	0:00.73	Qxh4+ Kxh4 Bf6+ g5 Bc3 Qf2 Be5 Qg1+ Kxg1 g4 f4 g3 f5 Kg5 f6 Kg6 Kf1 h4
 15	+4.82 	828428	0:00.64	Qxh4+ Kxh4 Bf6+ g5 Bc3 Qf2 Be5 Qg1+ Kxg1 g4 f4 g3 f5 Kg5 f6 Kg6 Kf1 h4
 14	+4.81 	804182	0:00.62	Qxh4+ Kxh4 Bf6+ g5 Bc3 Qf2 Be5 Qg1+ Kxg1 g4 f4 g3 f5 Kg5 f6 Kg6 Kf1
 14	+4.81 	720306	0:00.54	Qxh4+ Kxh4 Bf6+ g5 Bc3 Qf2 Be5 Qg1+ Kxg1 g4 f4 g3 f5 Kg5 f6 Kg6 Kf1
 13	+4.79 	707697	0:00.54	Qxh4+ Kxh4 Bf6+ g5 Bc3 Qf2 Be5 Qg1+ Kxg1 g4 f4 g3 f5 Kg5 f6 Kg6
 13	+4.79 	707697	0:00.54	Qxh4+ Kxh4 Bf6+ g5 Bc3 Qf2 Be5 Qg1+ Kxg1 g4 f4 g3 f5 Kg5 f6 Kg6
 13	+0.97!	683420	0:00.51	Qxh4+ Kxh4 Bf6+ g5 Bc3 Qf2 Be5 Qxg2+ Kxg2 g4 fxg4 hxg4 Kf2 g3+ Bxg3+ Kg4!
 13	 -0.28 	618742	0:00.46	Bh6+ Kxh6 Qxh4 Qe5+ Kg1 g5 Qf2 Qa1+ Kh2 Qf6 Qe3 Qd6+ g3 Qf6 Qc5 h4 gxh4
 12	 -0.33 	330976	0:00.26	Bh6+ Kxh6 Qxh4 Qe5+ Qg3 Qf6 Qe1 g5 Kg1 h4 Qe3 Kg7 Kf1 Qa1+ Ke2 Qa2+ Qd2
[d]8/8/8/1B6/6p1/8/4KPpp/3N2kr w - - bm Kd3

Code: Select all

25	  #11 	29.0M  	0:14.28	Kd3 g3 f4 Kf1 Kd2+ Kg1 Bd7 Kf1 Bh3 Rg1 Bg4 Rh1 Be2+ Kg1 Nc3
 25	  #11 	20.4M  	0:10.32	Kd3 g3 f4 Kf1 Kd2+ Kg1 Bd7 Kf1 Bh3 Rg1 Bg4 Rh1
 24	  #11 	18.0M  	0:09.23	Kd3 g3 f4 Kf1 Kd2+ Kg1 Bd7 Kf1 Bh3 Rg1 Bg4 Rh1 Be2+ Kg1 Nc3 Kf2 Ne4+ Kg1 Ng5 Kf2 Nh3#
 24	  #11 	16.1M  	0:08.31	Kd3 g3 f4 Kf1 Kd2+ Kg1 Bd7 Kf1 Bh3 Rg1 Bg4 Rh1
 23	  #11 	10.6M  	0:05.70	Kd3 g3 f4 Kf1 Kd2+ Kg1 Bd7 Kf1 Bh3 Rg1 Bg4 Rh1 Be2+ Kg1 Nc3 Kf2 Ne4+ Kg1 Ng5 Kf2 Nh3#
 23	  #11 	6.75M  	0:03.84	Kd3 g3 f4 Kf1 Kd2+ Kg1 Bd7 Kf1 Bh3 Rg1 Bg4 Rh1 Be2+ Kg1 Nc3
 22	  #11 	6.12M  	0:03.51	Kd3 g3 f4 Kf1 Kd2+ Kg1 Bd7 Kf1 Bh3 Rg1 Bg4 Rh1
 22	  #11 	6.11M  	0:03.51	Kd3 g3 f4 Kf1 Kd2+ Kg1 Bd7 Kf1 Bh3 Rg1 Bg4 Rh1
 22	  #11!	3.31M  	0:02.23	Kd3!
 22	  0.00 	3.31M  	0:01.78	Ne3 g3 fxg3
 21	  0.00 	3.18M  	0:01.73	Ne3 g3 fxg3
[d]8/p5pq/8/p2N3p/k2P3P/8/KP3PB1/8 w - - bm Be4

Code: Select all

29	+2.56 	210.2M	2:23.89	Be4 Qh6 Bd3 Qd2 Be2 g6 f3 Qc2 Bd1 Qxd1 Nc3+ Kb4 Nxd1 Kc4 Ne3+ Kxd4 Ng2 Ke5 Kb3 Kf5 Kc4 g5 hxg5 Kxg5 Kd3 h4 f4+ Kg4 Ke4 h3 Ne3+ Kg3 Nf1+ Kg2 Nd2
 28	+2.86 	160.2M	1:40.12	Be4 Qh6 Bd3 Qd2 Be2 g6 f3 Qc2 Bd1 Qxd1 Nc3+ Kb4 Nxd1 Kc4 Ne3+ Kxd4 Ng2 Ke5 Ka3 Kf5 Ka4 g5 Kxa5 gxh4 Nxh4+ Kg5 Ng2
 28	+2.86 	138.8M	1:22.81	Be4 Qh6 Bd3 Qd2 Be2 g6 f3 Qc2 Bd1 Qxd1 Nc3+ Kb4 Nxd1 Kc4 Ne3+ Kxd4 Ng2 Ke5 Ka3 Kf5 Ka4 g5 Kxa5 gxh4 Nxh4+ Kg5 Ng2
 27	+2.86 	121.0M	1:11.14	Be4 Qh6 Bd3 Qd2 Be2 g6 f3 Qc2 Bd1 Qxd1 Nc3+ Kb4 Nxd1 Kc4 Ne3+ Kxd4 Ng2 Ke5 Ka3 Kf5 Ka4 g5 Kxa5 gxh4 Nxh4+ Kg5 Ng2
 27	+2.86 	98.1M  	0:57.03	Be4 Qh6 Bd3 Qd2 Be2 g6 f3 Qc2 Bd1 Qxd1 Nc3+ Kb4 Nxd1 Kc4 Ne3+ Kxd4 Ng2 Ke5 Ka3 Kf5 Ka4 g5 Kxa5 gxh4 Nxh4+ Kg5 Ng2
 26	+2.91 	81.8M  	0:45.93	Be4 Qh6 Bd3 Qd2 Be2 g6 f3 Qc2 Bd1 Qxd1 Nc3+ Kb4 Nxd1 Kc4 Nc3 Kxd4 Ka3 Ke5 Ne2 Kf6 Ka4 g5 hxg5+ Kxg5 Kxa5 h4 Ng1 Kf5
 26	+2.91 	79.8M  	0:44.78	Be4 Qh6 Bd3 Qd2 Be2 g6 f3 Qc2 Bd1 Qxd1 Nc3+ Kb4 Nxd1 Kc4 Nc3 Kxd4 Ka3 Ke5 Ne2 Kf6 Ka4 g5 hxg5+ Kxg5 Kxa5 h4 Ng1 Kf5
 26	+1.25!	52.7M  	0:32.26	Be4 Qh6 Bd3 Qd2 Be2 a6 f3 g5 hxg5 h4 g6 h3 g7 Qxd4 g8=Q Qd2 Bxa6 Qh6 Nc3+ Kb4 Qg4+ Kc5 Ne4+ Kb4 b3 a4 bxa4 Kxa4!
 26	  0.00 	48.0M  	0:23.96	b3+ Kb5 Nc7+ Kb6 Nd5+ Kb5

Re: 4 old zugzwangs where modern engines still have troubles

Posted: Tue Jul 12, 2016 9:45 pm
by Eelco de Groot
Rainbow Serpent thinks the first one is about Mate in 22:

[D]6k1/3p4/P2P4/8/5Kp1/1p4Q1/p5p1/b7 w - -

Engine: Rainbow Serpent 20160626 023 MP (32 bit, 4 threads, i7 6700, 512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott

20/37 0:01 0.00 1.Qe1 Bc3 2.Qxc3 g1Q 3.Qxb3+ Kf8
4.Qxa2 Qd4+ 5.Kf5 Qd3+ 6.Kxg4 Qd4+
7.Kh3 Qe3+ 8.Kh2 Qe5+ 9.Kg2 Qe4+
10.Kh3 Qe3+ (11.177.888) 8123
.
.
.
26/37 0:21 0.00 1.Qe1 Bc3 2.Qxc3 g1Q 3.Qxb3+ Kf8
4.Qxa2 Qd4+ 5.Kf5 Qd3+ 6.Kxg4 Qd4+
7.Kh3 Qe3+ 8.Kg4 Qe4+ 9.Kh3 Qe3+ (176.358.983) 8326


27/37 0:35 +0.07++ 1.Qxg2 (300.402.298) 8443

27/37 0:37 +0.15++ 1.Qxg2 (312.581.488) 8425
.
.
.
27/59 1:18 +39.62 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7
4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7
7.Qxa2 Bd4 8.Qb3 Bf6 9.Kxg4 Kh6
10.Kf5 Bd4 11.Qh3+ Kg7 12.Qg2+ Kf8
13.Qa8+ Kg7 14.Qe4 (645.598.103) 8207
.
.
.
36/59 5:04 +123.44++1.Qxg2 (2.559.205.394) 8399

36/59 5:21 +M55++ 1.Qxg2 (2.701.505.892) 8412

36/59 5:44 +M47 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7
4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7
7.Qxa2 Bd4 8.Qb3 Kh6 9.Kxg4 Kg6
10.Qd3+ Kf6 11.Qxd4+ Ke6 12.Qxb2 Kxd6
13.Qb5 Ke6 14.Kf4 (2.910.728.569) 8441

37/59 6:40 +M54 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7
4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7
7.Qxa2 Bd4 8.Qb3 Kh6 9.Kxg4 Kg6
10.Qd3+ Kf6 11.Qxd4+ Ke6 12.Qxb2 Kxd6
13.Qb5 Ke6 14.Kf4 (3.399.995.099) 8498

38/59 6:47 +M44++ 1.Qxg2 (3.466.109.665) 8499

38/59 7:55 +M34++ 1.Qxg2 (4.062.067.208) 8534

38/59 9:34 +M23 1.Qxg2 Be5+ 2.Kf5 Kh7 3.a7 b2 4.Qh1+ Kg7
5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bd4
8.Qb3 Kh6 9.Kxg4 Kg6 10.Qd3+ Kf6
11.Qxd4+ Ke6 12.Qxb2 Kd5 13.Qb5+ Kxd6
14.Kf5 (4.958.995.895) 8636

39/59 10:39 +M23 1.Qxg2 Be5+ 2.Kf5 Kh7 3.a7 b2 4.Qh1+ Kg7
5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bc3
8.Qb3 Bd4 9.Qd3 Kh6 10.Kxg4 Bc3
11.Kf5 Bd4 12.Qe4 Bc3 13.Qe3+ Kh7
14.Qd3 (5.561.629.444) 8693

40/59 12:33 +M22 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7
4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7
7.Qxa2 Bc3 8.Qb3 Kh6 9.Kxg4 Kg6
10.Qc2+ Kf6 11.Qxc3+ Ke6 12.Qxb2 Kxd6
13.Qb5 Kc7 14.Kf5 (6.602.634.265) 8766

41/59 15:10 +M22 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7
4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7
7.Qxa2 Bc3 8.Qb3 Bd4 9.Qd3 Kh6
10.Kxg4 Bc3 11.Kf5 Bd4 12.Qe4 Bc3
13.Qe3+ Kh7 14.Qd3 (8.046.156.215) 8840


best move: Qg3xg2 time: 15:17.359 min n/s: 8.840.890 nodes: 8.110.313.227

Re: 4 old zugzwangs where modern engines still have troubles

Posted: Tue Jul 12, 2016 9:50 pm
by kgburcham
[D] 6k1/3p4/P2P4/8/5Kp1/1p4Q1/p5p1/b7 w - -


Engine: Komodo 10 64-bit (8192 MB)
by Don Dailey, Larry Kaufman, Mark Lefler
Threads now set to 8
20.00 0:01 +0.65++ 1.Qxg2 Be5+ 2.Kf5 (36.836.900) 24665
20.00 0:01 +0.80++ 1.Qxg2 Be5+ 2.Kf5 (38.470.578) 24700
20.00 0:01 +1.02++ 1.Qxg2 Be5+ 2.Kf5 (39.887.831) 24705
20.00 0:01 +1.35++ 1.Qxg2 Be5+ 2.Kf5 (41.312.792) 24699
20.00 0:01 +1.84++ 1.Qxg2 Be5+ 2.Kf5 (43.469.724) 24703
20.00 0:01 +2.57++ 1.Qxg2 Be5+ 2.Kf5 (46.056.441) 24659
20.00 0:02 +3.66++ 1.Qxg2 Be5+ 2.Kf5 (51.499.104) 24281
20.00 0:02 +4.26 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7 4.a7 b2 5.a8Q b1Q+ 6.Kxe5 Qb2+ 7.Ke4 Qb4+ 8.Kf5 Qc5+ 9.Kxg4 Qc4+ 10.Kg3 Qc3+ 11.Kf4 Qf6+ 12.Ke4 Qe6+ 13.Kd4 Qxd6+ 14.Kc4 (58.161.497) 23943
21.00 0:02 +4.19-- 1.Qxg2 Be5+ (65.180.955) 24120
21.00 0:03 +4.12-- 1.Qxg2 Be5+ (73.261.225) 24343
21.01 0:03 +4.02-- 1.Qxg2 Be5+ (74.083.125) 24372
21.01 0:03 +3.87-- 1.Qxg2 Be5+ (75.133.922) 24413
21.01 0:03 +3.65-- 1.Qxg2 Be5+ (75.715.588) 24435
21.01 0:03 +3.81++ 1.Qxg2 Be5+ 2.Kf5 (79.034.155) 24509
21.01 0:03 +4.30++ 1.Qxg2 Be5+ 2.Kf5 (81.152.964) 24511
21.01 0:03 +5.03++ 1.Qxg2 Be5+ 2.Kf5 (84.195.687) 24562
21.01 0:03 +6.12++ 1.Qxg2 Be5+ 2.Kf5 (90.608.115) 24635
21.01 0:03 +6.40 1.Qxg2 Be5+ 2.Kf5 Kh7 3.a7 b2 4.Qh1+ Kg7 5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bc3 8.Qb1 g3 9.Qe4 Bd2 10.Qe7+ Kh8 11.Qd8+ Kg7 12.Qxd7+ Kf8 13.Qe7+ Kg8 14.Qe6+ (93.528.929) 24664
22.01 0:04 +6.47++ 1.Qxg2 Be5+ 2.Kf5 (99.928.702) 24782
22.01 0:04 +6.54++ 1.Qxg2 Be5+ 2.Kf5 (102.120.663) 24826
22.01 0:04 +6.64++ 1.Qxg2 Be5+ 2.Kf5 (103.574.007) 24847
22.01 0:04 +6.68 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7 4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bc3 8.Qb3 Bd4 9.Qb7 Kh6 10.Kxg4 Bf6 11.Qh1+ Kg7 12.Kf5 Bd4 13.Qg2+ Kf8 14.Qb7 (106.646.537) 24879
23.01 0:04 +6.75++ 1.Qxg2 Be5+ 2.Kf5 (118.398.691) 25032
23.01 0:04 +6.76 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7 4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bc3 8.Qb3 Bd4 9.Qb7 Kh6 10.Kxg4 Bf6 11.Qh1+ Kg7 12.Kf5 Bd4 13.Qe4 Kh7 14.Qh4+ (121.656.563) 25043
24.01 0:05 +6.83++ 1.Qxg2 Be5+ 2.Kf5 (137.249.811) 25182
24.01 0:05 +6.90++ 1.Qxg2 Be5+ 2.Kf5 (141.727.314) 25243
24.01 0:05 +7.00++ 1.Qxg2 Be5+ 2.Kf5 (146.432.255) 25318
24.01 0:06 +7.05 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7 4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bc3 8.Qb3 Bd4 9.Qb7 Kh6 10.Kxg4 Bf6 11.Qh1+ Kg7 12.Kf5 Bd4 13.Qg2+ Kf8 14.Qb7 (155.659.227) 25356
25.01 0:07 +7.12++ 1.Qxg2 Be5+ 2.Kf5 (178.849.120) 25461
25.01 0:07 +7.12 1.Qxg2 Be5+ 2.Kf5 Kh7 3.a7 b2 4.Qh1+ Kg7 5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bc3 8.Qb3 Bd4 9.Qb7 Kh6 10.Kxg4 Bf6 11.Qh1+ Kg7 12.Kf5 Bd4 13.Qg2+ Kf8 14.Qb7 (188.169.271) 25463
26.01 0:08 +7.19++ 1.Qxg2 Be5+ 2.Kf5 (228.595.676) 25582
26.01 0:09 +7.35 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7 4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bc3 8.Qb3 Bd4 9.Qb7 Kh6 10.Kxg4 Bf6 11.Qh1+ Kg7 12.Kf5 Bd4 13.Qe4 Kf7 14.Qe7+ (250.372.338) 25583
27.01 0:11 +7.42++ 1.Qxg2 Be5+ 2.Kf5 (300.338.027) 25677
27.01 0:14 +9.61 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7 4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bc3 8.Qb3 Bd4 9.Qb5 Kh6 10.Kxg4 Kg6 11.Qd3+ Kf6 12.Qf5+ Kg7 13.Qxd7+ Kg6 14.Qf5+ (386.457.176) 25805
28.01 0:17 +9.61 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7 4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bc3 8.Qb3 Bd4 9.Qb7 Kh6 10.Kxg4 Kg6 11.Qe4+ Kf6 12.Qf5+ Kg7 13.Qxd7+ Kg6 14.Qf5+ (454.938.820) 25822
29.01 0:21 +9.68++ 1.Qxg2 Be5+ 2.Kf5 (548.391.488) 25944
29.01 0:30 +M27 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7 4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kh7 7.Qxa2 Bc3 8.Qb1 Kg7 9.Kxg4 Kf6 10.Qf5+ Kg7 11.Qxd7+ Kf6 12.Qe7+ Kg6 13.Qe6+ Kg7 14.Qb3 (796.279.300) 26326
30.01 0:33 +M25 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7 4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bd4 8.Qb3 Kh6 9.Kxg4 Kg6 10.Qd3+ Kf6 11.Qf5+ Kg7 12.Qxd7+ Kg6 13.Qe6+ Kg7 14.Qe4 (881.584.613) 26452
31.01 0:36 +M25 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7 4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bd4 8.Qb3 Kh6 9.Kxg4 Kg6 10.Qd3+ Kf6 11.Qf5+ Kg7 12.Qxd7+ Kg6 13.Qe6+ Kg7 14.Qe4 (968.814.920) 26449
32.01 0:42 +M25 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7 4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bd4 8.Qb3 Kh6 9.Kxg4 Kg6 10.Qd3+ Kf6 11.Qf5+ Kg7 12.Qxd7+ Kg6 13.Qe6+ Kg7 14.Qe4 (1.122.618.692) 26513
33.01 0:52 +M25 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7 4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bd4 8.Qb3 Kh6 9.Kxg4 Kg6 10.Qd3+ Kf6 11.Qf5+ Kg7 12.Qxd7+ Kg6 13.Qe6+ Kg7 14.Qe4 (1.400.962.870) 26603
34.01 1:10 +M25 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7 4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bd4 8.Qb3 Kh6 9.Kxg4 Kg6 10.Qd3+ Kf6 11.Qf5+ Kg7 12.Qxd7+ Kg6 13.Qe6+ Kg7 14.Qe4 (1.889.058.656) 26629
35.01 1:40 +M24 1.Qxg2 Be5+ 2.Kf5 Kh7 3.Qh1+ Kg7 4.a7 b2 5.Qh8+ Kxh8 6.a8Q+ Kg7 7.Qxa2 Bd4 8.Qb3 Kh6 9.Kxg4 Kg6 10.Qd3+ Kf6 11.Qf5+ Kg7 12.Qxd7+ Kg6 13.Qe6+ Kg7 14.Qe4 (2.664.745.311) 26619
best move: Qg3xg2 time: 1:44.625 min n/s: 26.613.280 nodes: 2.784.567.958


[D] 8/6B1/p5p1/Pp4kp/1P5r/5P1Q/4q1PK/8 w - -

27.00 0:01 +15.43 1.Qxh4+ Kxh4 2.Bf6+ g5 3.Bc3 Qf2 4.Be5 Qg1+ 5.Kxg1 g4 6.g3+ Kg5 7.f4+ Kf5 8.Kf2 Ke4 9.Ke2 Kd5 10.Ke3 Ke6 11.Ke4 Ke7 12.f5 Ke8 13.Kf4 Kd7 14.Kg5 (47.579.352) 24024
28.00 0:02 +15.51++ 1.Qxh4+ Kf5 2.Qh3+ (57.228.223) 24088
28.00 0:02 +17.18 1.Qxh4+ Kxh4 2.Bf6+ g5 3.Bc3 Qf2 4.Be5 Qg1+ 5.Kxg1 g4 6.g3+ Kg5 7.f4+ Kf5 8.Kf2 Ke4 9.Ke2 Kd5 10.Ke3 Ke6 11.Ke4 Ke7 12.f5 Ke8 13.f6 Kd8 14.Kf5 (60.339.381) 24146
29.00 0:02 +17.18 1.Qxh4+ Kxh4 2.Bf6+ g5 3.Bc3 Qf2 4.Be5 Qg1+ 5.Kxg1 g4 6.g3+ Kg5 7.f4+ Kf5 8.Kf2 Ke4 9.Ke2 Kd5 10.Ke3 Ke6 11.Ke4 Ke7 12.f5 Ke8 13.f6 Kd8 14.Kf5 (69.479.486) 24182
30.01 0:03 +17.25++ 1.Qxh4+ Kxh4 2.Bf6+ (95.810.705) 24122
30.01 0:04 +17.45 1.Qxh4+ Kxh4 2.Bf6+ g5 3.Bc3 Qf2 4.Be5 Qg1+ 5.Kxg1 g4 6.g3+ Kg5 7.f4+ Kf5 8.Kf2 Ke4 9.Ke2 Kd5 10.Ke3 Ke6 11.Ke4 Ke7 12.f5 Ke8 13.f6 Kd8 14.Kf4 (98.764.227) 24177
31.01 0:06 +17.52++ 1.Qxh4+ Kxh4 2.Bf6+ (153.611.918) 24101
31.01 0:06 +17.78 1.Qxh4+ Kxh4 2.Bf6+ g5 3.Bc3 Qf2 4.Be5 Qg1+ 5.Kxg1 g4 6.g3+ Kg5 7.f4+ Kf5 8.Kf2 Ke4 9.Ke2 Kd5 10.Ke3 Ke6 11.Ke4 Ke7 12.f5 Ke8 13.f6 Kd8 14.Kf4 (158.875.484) 24149
32.01 0:07 +17.94++ 1.Qxh4+ Kf5 2.Qh3+ (189.997.157) 24155
32.01 0:09 +M31 1.Qxh4+ Kxh4 2.Bf6+ g5 3.Bc3 Qf2 4.Be5 Qg1+ 5.Kxg1 g4 6.g3+ Kg5 7.f4+ Kf5 8.Kf1 Kg6 9.Ke2 Kh6 10.Ke3 h4 11.gxh4 g3 12.Kf3 g2 13.Kxg2 Kg6 14.Kg3 (230.232.246) 24477
33.01 0:14 +M31 1.Qxh4+ Kxh4 2.Bf6+ g5 3.Bc3 Qf2 4.Be5 Qg1+ 5.Kxg1 g4 6.g3+ Kg5 7.f4+ Kf5 8.Kf1 Kg6 9.Ke2 Kh6 10.Ke3 h4 11.gxh4 g3 12.Kf3 g2 13.Kxg2 Kg6 14.Kg3 (348.122.560) 24413
34.01 0:21 +M31 1.Qxh4+ Kxh4 2.Bf6+ g5 3.Bc3 Qf2 4.Be5 Qg1+ 5.Kxg1 g4 6.g3+ Kg5 7.f4+ Kf5 8.Kf1 Kg6 9.Ke2 Kh6 10.Ke3 h4 11.gxh4 g3 12.Kf3 g2 13.Kxg2 Kg6 14.Kg3 (553.420.358) 25365
35.01 0:31 +M31 1.Qxh4+ Kxh4 2.Bf6+ g5 3.Bc3 Qf2 4.Be5 Qg1+ 5.Kxg1 g4 6.g3+ Kg5 7.f4+ Kf5 8.Kf1 Kg6 9.Ke2 Kh6 10.Ke3 h4 11.gxh4 g3 12.Kf3 g2 13.Kxg2 Kg6 14.Kg3 (790.871.174) 25201
36.01 0:48 +M31 1.Qxh4+ Kxh4 2.Bf6+ g5 3.Bc3 Qf2 4.Be5 Qg1+ 5.Kxg1 g4 6.g3+ Kg5 7.f4+ Kf5 8.Kf1 Kg6 9.Ke2 Kh6 10.Ke3 h4 11.gxh4 g3 12.Kf3 g2 13.Kxg2 Kg6 14.Kg3 (1.218.823.731) 25185
best move: Qh3xh4 time: 0:50.875 min n/s: 25.195.733 nodes: 1.281.611.951


[D] 8/8/8/1B6/6p1/8/4KPpp/3N2kr w - -

33.00 0:01 0.00 1.Ne3 g3 2.fxg3 (38.401.700) 24756
34.00 0:01 0.00 1.Ne3 g3 2.fxg3 (47.731.009) 24725
35.01 0:03 0.00 1.Ne3 g3 2.fxg3 (95.394.174) 28660
36.01 0:04 0.00 1.Ne3 g3 2.fxg3 (113.307.000) 27929
37.01 0:05 0.00 1.Ne3 g3 2.fxg3 (149.742.637) 27577
38.01 0:06 0.00 1.Ne3 g3 2.fxg3 (173.366.305) 27243
39.01 0:07 0.00 1.Ne3 g3 2.fxg3 (211.517.434) 26758
40.01 0:10 0.00 1.Ne3 g3 2.fxg3 (267.120.049) 26189
41.01 0:16 0.00 1.Ne3 g3 2.fxg3 (454.177.602) 27867
42.01 0:18 0.00 1.Ne3 g3 2.fxg3 (520.207.521) 27571
42.11 0:24 +M11++ 1.Kd3 g3 2.f4 (688.923.130) 28274
42.01 0:25 +M11 1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3+ (713.046.276) 28239
43.01 0:25 +M11 1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3+ (722.636.299) 28228
44.01 0:26 +M11 1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3+ (743.347.588) 28238
45.01 0:27 +M11 1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3+ (765.284.314) 28235
46.01 0:28 +M11 1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3+ (797.249.608) 28256
47.01 0:29 +M11 1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3+ (836.279.000) 28278
48.01 0:30 +M11 1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3+ (870.411.911) 28312
49.01 0:32 +M11 1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3+ (934.727.557) 28348
50.01 0:34 +M11 1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3+ (987.721.543) 28400
51.01 0:37 +M11 1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3+ (1.068.011.359) 28471
52.01 0:40 +M11 1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3+ (1.151.501.123) 28541
53.01 0:43 +M11 1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3+ (1.245.896.208) 28643
54.01 0:46 +M11 1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3+ (1.335.956.442) 28728
55.01 0:50 +M11 1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3+ (1.463.009.382) 28828
56.01 0:54 +M11 1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3+ (1.578.425.225) 28916
best move: Ke2-d3 time: 0:54.781 min n/s: 28.920.933 nodes: 1.584.173.288


[D] 8/p5pq/8/p2N3p/k2P3P/8/KP3PB1/8 w - -

28.00 0:01 0.00 1.b3+ Kb5 2.Nc7+ Kb6 3.Nd5+ Ka6 4.Nc7+ Kb6 (35.259.333) 22052
29.00 0:01 0.00 1.b3+ Kb5 2.Nc7+ Kb6 3.Nd5+ Ka6 4.Nc7+ Kb6 (41.629.492) 22189
29.00 0:02 +0.07++ 1.Be4 Qh6 2.Bd3 (56.983.784) 21919
29.00 0:02 +0.14++ 1.Be4 Qh6 2.Bd3 (60.834.946) 22019
29.00 0:02 +0.24++ 1.Be4 Qh6 2.Bd3 (65.008.815) 22120
29.00 0:03 +0.39++ 1.Be4 Qh6 2.Bd3 (72.326.557) 22137
29.01 0:03 +0.61++ 1.Be4 Qh6 2.Bd3 (80.688.506) 22330
29.01 0:03 +0.94++ 1.Be4 Qh6 2.Bd3 (89.068.130) 22403
29.01 0:04 +1.43++ 1.Be4 Qh6 2.Bd3 (95.809.565) 22459
29.01 0:04 +2.16++ 1.Be4 Qh6 2.Bd3 (101.450.143) 22434
29.01 0:04 +3.25++ 1.Be4 Qh6 2.Bd3 (110.809.050) 22470
29.01 0:05 +4.88++ 1.Be4 Qh6 2.Bd3 (128.167.706) 22317
29.01 0:06 +4.88 1.Be4 Qh6 2.Bd3 Qd2 3.Be2 g6 4.f3 Qc2 5.Bd1 Qxd1 6.Nc3+ Kb4 7.Nxd1 Kc4 8.Ne3+ Kxd4 9.Ng2 Kd3 10.Nf4+ Ke3 11.Nxg6 Kxf3 12.Kb3 Ke2 13.Ka4 Ke3 14.Kxa5 (145.901.930) 22300
30.01 0:06 +4.95++ 1.Be4 Qh6 2.Bd3 (155.034.463) 22327
30.01 0:07 +5.02++ 1.Be4 Qh6 2.Bd3 (157.728.834) 22326
30.01 0:07 +5.12++ 1.Be4 Qh6 2.Bd3 (160.118.515) 22344
30.01 0:07 +5.27++ 1.Be4 Qh6 2.Bd3 (163.363.503) 22378
30.01 0:07 +5.49++ 1.Be4 Qh6 2.Bd3 (168.525.156) 22394
30.01 0:08 +5.82++ 1.Be4 Qh6 2.Bd3 (179.991.845) 22385
30.01 0:08 +6.31++ 1.Be4 Qh6 2.Bd3 (193.135.414) 22359
30.01 0:09 +6.82 1.Be4 Qh6 2.Bd3 Qd2 3.Be2 g6 4.f3 Qc2 5.Bd1 Qxd1 6.Nc3+ Kb4 7.Nxd1 Kc4 8.Ne3+ Kxd4 9.Ng2 Ke5 10.Ka3 Kf5 11.Ka4 g5 12.hxg5 Kxg5 13.Kxa5 Kf6 14.Ka6 (216.770.478) 22373
31.01 0:12 +6.82 1.Be4 Qh6 2.Bd3 Qd2 3.Be2 g6 4.f3 Qc2 5.Bd1 Qxd1 6.Nc3+ Kb4 7.Nxd1 Kc4 8.Ne3+ Kxd4 9.Ng2 Ke5 10.Ka3 Kf5 11.Ka4 g5 12.hxg5 Kxg5 13.Kxa5 Kf6 14.Ka6 (269.725.410) 22467
32.01 0:13 +6.89++ 1.Be4 Qh6 2.Bd3 (306.926.683) 22511
32.01 0:14 +6.96++ 1.Be4 Qh6 2.Bd3 (315.298.479) 22513
32.01 0:17 +7.21 1.Be4 Qh6 2.Bd3 Qd2 3.Be2 g6 4.f3 Qc2 5.Bd1 Qxd1 6.Nc3+ Kb4 7.Nxd1 Kc4 8.Ne3+ Kxd4 9.Ng2 Ke5 10.Ka3 Kd4 11.Ka4 Kd3 12.Kxa5 Ke2 13.Nf4+ Ke3 14.Nxg6 (402.555.916) 22696
33.01 0:25 +7.21 1.Be4 Qh6 2.Bd3 Qd2 3.Be2 g6 4.f3 Qc2 5.Bd1 Qxd1 6.Nc3+ Kb4 7.Nxd1 Kc4 8.Ne3+ Kxd4 9.Ng2 Ke5 10.Kb3 Kd4 11.Ka4 Kd3 12.Nf4+ Kd2 13.Nxg6 Ke3 14.Kb5 (576.987.079) 22860
34.01 0:34 +7.28++ 1.Be4 Qh6 2.Bd3 (792.590.037) 23061
34.01 0:53 +9.59 1.Be4 Qh6 2.Bd3 Qd2 3.Be2 g6 4.f3 Qc2 5.Bd1 Qxd1 6.Nc3+ Kb4 7.Nxd1 Kc4 8.Ne3+ Kxd4 9.Ng2 Ke5 10.Kb3 Kd4 11.Ka4 Kd3 12.Nf4+ Kd2 13.Nxg6 Ke3 14.Kxa5 (1.253.348.773) 23285
35.01 1:04 +9.59 1.Be4 Qh6 2.Bd3 Qd2 3.Be2 g6 4.f3 Qc2 5.Bd1 Qxd1 6.Nc3+ Kb4 7.Nxd1 Kc4 8.Ne3+ Kxd4 9.Ng2 Ke5 10.Kb3 Kd4 11.Ka4 Kd3 12.Nf4+ Kd2 13.Nxg6 Ke3 14.Kxa5 (1.513.322.327) 23441
36.01 1:21 +9.59 1.Be4 Qh6 2.Bd3 Qd2 3.Be2 g6 4.f3 Qc2 5.Bd1 Qxd1 6.Nc3+ Kb4 7.Nxd1 Kc4 8.Ne3+ Kxd4 9.Ng2 Kc4 10.Ka3 Kd3 11.Nf4+ Ke3 12.Nxg6 Kxf3 13.Ka4 Ke3 14.Kxa5 (1.912.722.640) 23606
37.01 1:51 +9.66++ 1.Be4 Qh6 2.Bd3 (2.651.822.008) 23833
best move: Bg2-e4 time: 1:53.828 min n/s: 23.835.718 nodes: 2.713.069.216

Re: 4 old zugzwangs where modern engines still have troubles

Posted: Tue Jul 12, 2016 10:37 pm
by Dann Corbit
Stockfish had a very hard time and Komodo 10 crashed.

Matefinder solves 3/4 quickly, but has a hard time on the one.

Asmfish, which may be the strongest engine (at least with quick time control) in the world according to this test:
http://spcc.beepworld.de/
had a terrible time.

Re: 4 old zugzwangs where modern engines still have troubles

Posted: Tue Jul 12, 2016 11:01 pm
by jhellis3
Which one did MF struggle with? These relatively simple positions where it still fails are always good to help me improve it.

Re: 4 old zugzwangs where modern engines still have troubles

Posted: Tue Jul 12, 2016 11:44 pm
by yanquis1972
Dann Corbit wrote:Stockfish had a very hard time and Komodo 10 crashed.

Matefinder solves 3/4 quickly, but has a hard time on the one.

Asmfish, which may be the strongest engine (at least with quick time control) in the world according to this test:
http://spcc.beepworld.de/
had a terrible time.
might want to retry-- K10 spit through all of them but the last quite quickly, & still found the final position in a couple minutes for me (using 6 man syzygys on an HDD).

edit -- missed the Be4 position, so i havent ran that.

kgburchams results are with null move disabled, although he fails to mention it....

Re: 4 old zugzwangs where modern engines still have troubles

Posted: Tue Jul 12, 2016 11:48 pm
by Dann Corbit
I have the same configuration.
On a second pass, K10 solved 2 out of 4 quickly.

Re: 4 old zugzwangs where modern engines still have troubles

Posted: Tue Jul 12, 2016 11:52 pm
by Dann Corbit
[d]6k1/3p4/P2P4/8/5Kp1/1p4Q1/p5p1/b7 w - -

@3minutes:

Code: Select all

infinite: 0 ponder: 0 time: 0 increment: 0 moves to go: 0

 1   +4.62   00:00      34  Qxg2 
 2   +5.09   00:00     156  Qxb3+ Kg7 Qb6 
 3   -0.32   00:00     580  Qxb3+ Kg7 Qd1 Bf6 
 4   -0.44   00:00     787  Qxb3+ Kg7 Qd1 Bf6 Qxg4+ Kf8 
 5   -0.33   00:00    1323  Qxg2 Be5+ Kxe5 a1=Q+ Ke4 Qa4+ Kf5 Qxa6 
 6   -0.69   00:00    2323  Qxg2 Be5+ Kxe5 a1=Q+ Ke4 Qa4+ Ke3 Kf7 Qd5+ Kf6 
 7   -0.69   00:00    3434  Qxg2 Be5+ Kxe5 a1=Q+ Ke4 Qa4+ Ke3 Kf7 Qd5+ Kf6 Qd4+ Qxd4+ Kxd4 
 8   +0.00   00:00    5106  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 
 9   +0.00   00:00    5682  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
10   +0.00   00:00    8926  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
11   +0.00   00:00   11748  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
12   +0.00   00:00   14720  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
13   +0.00   00:00   20010  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
14   +0.00   00:01   39756  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
15   +0.00   00:01   45412  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
16   +0.00   00:02   66684  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
17   +0.00   00:03  114535  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
18   +0.00   00:09  321785  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
19   +0.00   00:13  398447  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
20   +0.00   00:21  676004  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
21   +0.00   00:37   1030K  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
22   +0.00   00:43   1177K  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
23   +0.00   01:01   1845K  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
24   +0.00   01:29   2843K  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
25   +0.00   02:06   4595K  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kg6 Qf5+ Kh6 Qg5+ Kh7 Qf5+ Kg8 Qe6+ Kf8 Qc8+ Kf7 Qd7+ Kf6 Qf5+ Kg7 Qd7+ 
On a second pass, it did much better:

Code: Select all

Searching: 6k1/3p4/P2P4/8/5Kp1/1p4Q1/p5p1/b7 w - - 0 1
infinite: 0 ponder: 0 time: 0 increment: 0 moves to go: 0

 1   +4.62   00:00      32  Qxg2 
 2   +0.67   00:00     720  Ke4 Bc3 Qxg4+ Kf7 
 3   -0.04   00:00     846  Ke4 Bc3 Qxg4+ Kf8 
 4   -0.37   00:00    1539  Qxg2 Be5+ Kxe5 a1=Q+ Ke4 b2 Qxg4+ Kf8 
 5   -1.00   00:00    2444  Qxg2 Be5+ Kxe5 a1=Q+ Kd5 Qa5+ Ke4 Qa4+ Ke5 Qb5+ Qd5+ Qxd5+ Kxd5 
 6   -0.60   00:00    3985  Kxg4 Be5 Qxg2 a1=Q a7 Qxa7 
 7   -0.92   00:00    5763  Qxg2 Be5+ Kxg4 a1=Q a7 Qxa7 Qd5+ Kh7 Qe4+ Kh6 
 8   -0.99   00:00    6863  Qxg2 Be5+ Kxg4 a1=Q a7 Qxa7 Qd5+ Kh7 Qe4+ Kh6 Qxe5 
 9   +0.00   00:00   16685  Qxb3+ Kf8 Qb8+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
10   +0.00   00:00   26850  Qxb3+ Kf8 Qb8+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
11   +0.00   00:00   31536  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
12   +0.00   00:00   32458  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
13   +0.00   00:00   33692  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
14   +0.00   00:00   37076  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
15   +0.00   00:00   47738  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
16   +0.00   00:00   90533  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
17   +0.00   00:00  143398  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
18   +0.00   00:00  227955  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
19   +0.00   00:01  544334  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
20   +0.00   00:02  894091  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
21   +0.00   00:02   1187K  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
22   +0.00   00:05   1724K  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
23   +0.00   00:07   2287K  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
24   +0.00   00:13   3557K  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
25   +0.00   00:17   4819K  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
26   +0.00   00:34  11065K  Qxb3+ Kg7 Qb5 g1=Q Qxd7+ Kh8 Qc8+ Kh7 Qf5+ Kh8 Qc8+ 
27  +49.92   02:10  33382K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 Bc3 a8=Q Qxa8 Qxa8 b2 Qe4 Kh6 Kxg4 Bd4 Kf5 Bc3 Qf4+ Kg7 Qg5+ Kh7 Qh4+ Kg7 Qe7+ Kh6 Qe4 Kg7 Kg4 Kh8 Qe8+ Kh7 Qxd7+ Kh6 
28 +122.87   02:20  37448K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 Bc3 a8=Q Qxa8 Qxa8 b2 Qe4 g3 Qh4+ Kg8 Qxg3+ Kf8 Qd3 Bb4 Kg6 b1=B Qxb1 Bxd6 Qe4 Ba3 Qa8+ Ke7 Qxa3+ Ke6 Qh3+ Kd6 Kf5 Kc6 
29 +122.87   02:20  37545K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 Bc3 a8=Q Qxa8 Qxa8 b2 Qe4 g3 Qh4+ Kg8 Qxg3+ Kf8 Qd3 Bb4 Kg6 b1=B Qxb1 Bxd6 Qe4 Ba3 Qa8+ Ke7 Qxa3+ d6 Kf5 Kd7 Qc3 Kd8 Qf6+ Kd7 Qg7+ Kc8 
30     #41   02:31  39886K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 Bd4 a8=Q Qxa8 Qxa8 b2 Qe4 Kh6 Kxg4 Bc3 Qe3+ Kh7 Qd3+ Kg8 Kf5 Kh7 Qh3+ Kg8 Qg2+ Kf7 Qd5+ Kg7 Qe4 Kh6 Qf4+ Kh7 Qh4+ Kg7 Qg5+ Kh7 Qg6+ Kh8 Qe8+ Kh7 Qxd7+ Bg7 
31     #32   02:36  40526K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 Bd4 a8=Q Qxa8 Qxa8 b2 Qe4 Kh6 Kxg4 Bc3 Kf5 Kg7 Qe7+ Kh6 Qg5+ Kh7 Qg6+ Kh8 Qe8+ Kh7 Qxd7+ Kg8 Qc8+ Kh7 Qb7+ Kh6 d7 Ba5 Qxb2 Kh7 Qh2+ Kg7 Qe5+ Kh7 Qxa5 
32     #28   03:06  44097K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd5+ Ke7 a8=Q Qh7+ Kxg4 Qg7+ Qg5+ Qxg5+ Kxg5 Kd7 Qa4+ Kd6 Kf5 Kd5 Qb4 Kc6 Ke6 Kc7 
33     #28   03:07  44172K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd5+ Ke7 a8=Q Qh7+ Kxg4 Qg7+ Qg5+ Qxg5+ Kxg5 Kd7 Qa4+ Kd6 Kf5 Kd5 Qb4 Kc6 Ke6 Kc7 Qb5 
34     #28   03:07  44183K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd5+ Ke7 a8=Q Qh7+ Kxg4 Qg7+ Qg5+ Qxg5+ Kxg5 Kd7 Qa4+ Kd6 Kf5 Kd5 Qb4 Kc6 Ke6 Kc7 Qb5 Kc8 
35     #28   03:07  44281K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd5+ Ke7 a8=Q Qh7+ Kxg4 Qg7+ Qg5+ Qxg5+ Kxg5 Kd7 Qa4+ Kd6 Kf5 Kd5 Qb4 Kc6 Ke6 Kc7 Qb5 Kc8 Kd6 
36     #28   03:09  45005K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd5+ Ke7 a8=Q Qh7+ Kxg4 Qg7+ Qg5+ Qxg5+ Kxg5 Kd7 Qa4+ Kd6 Kf5 Kd5 Qb4 Kc6 Ke6 Kc7 Qb5 Kc8 Kd6 Kd8 
37     #28   03:15  46826K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd5+ Ke7 a8=Q Qh7+ Kxg4 Qg7+ Qg5+ Qxg5+ Kxg5 Kd7 Qa4+ Kd6 Kf6 Kc5 Ke5 Kb6 Kd6 Kb7 Qb4+ Ka7 Kc6 Ka8 Qb7+ 
38     #28   03:20  48139K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd5+ Ke7 a8=Q Qh7+ Kxg4 Qg7+ Qg5+ Qxg5+ Kxg5 Kd7 Qd5+ Kc8 Kf4 Kb8 Ke5 Kc7 Qb5 Kd8 Qb7 Ke8 Ke6 Kf8 Qf7+ 
39     #28   04:25  64013K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd5+ Ke7 a8=Q Qh7+ Kxg4 Qg7+ Qg5+ Qxg5+ Kxg5 Kd7 Qd5+ Kc8 Kf4 Kb8 Ke5 Kc7 Qb5 Kd8 Qb7 Ke8 Ke6 Kf8 Qf7+ 
40     #26   04:25  64210K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd7+ Kf6 Qd6+ Kf7 a8=Q Qh7+ Kxg4 Qg7+ Kf4 Qf6+ Qxf6+ Kxf6 Qe8 Kg7 Kf5 Kh7 Kf6 Kh6 Qg6+ 
41     #26   04:37  72274K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd7+ Kf6 Qd6+ Kf7 a8=Q Qh7+ Kxg4 Qg7+ Kf4 Qf6+ Qxf6+ Kxf6 Qe8 Kg7 Kf5 Kh7 Kf6 Kh6 Qg6+ 
42     #26   04:44  75202K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd7+ Kf6 Qd6+ Kf7 a8=Q Qh7+ Kxg4 Qg7+ Kf4 Qf6+ Qxf6+ Kxf6 Qe8 Kg7 Kf5 Kh7 Kf6 Kh6 Qg6+ 
43     #26   07:10 115598K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd7+ Kf6 Qd6+ Kf7 a8=Q Qh7+ Kxg4 Qg7+ Kf4 Qf6+ Qxf6+ Kxf6 Qe8 Kg7 Kf5 Kh7 Kf6 Kh6 Qg6+ 
44     #26   08:10 144924K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd7+ Kf6 Qd6+ Kf7 a8=Q Qh7+ Kxg4 Qg7+ Kf4 Qf6+ Qxf6+ Kxf6 Qe8 Kg7 Kf5 Kh7 Kf6 Kh6 Qg6+ 
45     #26   08:13 145875K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd7+ Kf6 Qd6+ Kf7 a8=Q Qh7+ Kxg4 Qg7+ Kf4 Qf6+ Qxf6+ Kxf6 Qe8 Kg7 Kf5 Kh7 Kf6 Kh6 Qg6+ 
46     #26   09:58 205260K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd7+ Kf6 Qd6+ Kf7 a8=Q Qh7+ Kxg4 Qg7+ Kf4 Qf6+ Qxf6+ Kxf6 Qe8 Kg7 Kf5 Kh7 Kf6 Kh6 Qg6+ 
47     #26   11:44 270134K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd7+ Kf6 Qd6+ Kf7 a8=Q Qh7+ Kxg4 Qg7+ Kf4 Qf6+ Qxf6+ Kxf6 Qe8 Kg7 Kf5 Kh7 Kf6 Kh6 Qg6+ 
48     #26   15:00 398806K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd7+ Kf6 Qd6+ Kf7 a8=Q Qh7+ Kxg4 Qg7+ Kf4 Qf6+ Qxf6+ Kxf6 Qe8 Kg7 Kf5 Kh7 Kf6 Kh6 Qg6+ 
49     #26   15:06 403102K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd7+ Kf6 Qd6+ Kf7 a8=Q Qh7+ Kxg4 Qg7+ Kf4 Qf6+ Qxf6+ Kxf6 Qe8 Kg7 Kf5 Kh7 Kf6 Kh6 Qg6+ 
50     #26   18:43 536463K  Qxg2 Be5+ Kf5 Kh7 Qe4 a1=Q a7 b2 Kg5+ Kg7 Qxe5+ Kh7 Qe7+ Kg8 Qe8+ Kg7 Qxd7+ Kg8 Qe8+ Kg7 Qe7+ Kg8 d7 Qc1+ Kh5 Qh1+ Qh4 Qxh4+ Kxh4 b1=Q d8=Q+ Kf7 Qd7+ Kf6 Qd6+ Kf7 a8=Q Qh7+ Kxg4 Qg7+ Kf4 Qf6+ Qxf6+ Kxf6 Qe8 Kg7 Kf5 Kh7 Kf6 Kh6 Qg6+ 

Re: 4 old zugzwangs where modern engines still have troubles

Posted: Wed Jul 13, 2016 9:40 am
by peter
Dann Corbit wrote:I have the same configuration.
On a second pass, K10 solved 2 out of 4 quickly.
And the two others on 24 threads with 32G hash, no Syzygys:

[d]8/8/8/1B6/6p1/8/4KPpp/3N2kr w - - 0 1

Analysis by Komodo 10 64-bit:

1.Ne3 g3 2.fxg3
= (0.00) Depth: 7 00:00:00 34kN
...
1.Ne3 g3 2.fxg3
= (0.00) Depth: 75 00:03:04 7525MN
1.Kd3 g3 2.f4
= (0.07 ++) Depth: 75 00:11:12 19719MN
...
1.Kd3 g3 2.f4
+/= (0.39 ++) Depth: 75 00:12:05 21066MN
1.Kd3 g3 2.f4
+- (#11 ++) Depth: 75 00:27:00 48557MN
1.Kd3 g3 2.f4 Kf1 3.Kd2+ Kg1 4.Bd7 Kf1 5.Bh3 Rg1 6.Bg4 Rh1 7.Be2+ Kg1 8.Nc3 Kf2 9.Ne4+ Kg1 10.Ng5 Kf2 11.Nh3#
+- (#11) Depth: 75 00:27:00 48558MN


[d]8/p5pq/8/p2N3p/k2P3P/8/KP3PB1/8 w - - 0 1

Analysis by Komodo 10 64-bit:

1.Bf1 Qc2 2.Nc3+ Kb4 3.Nd5+ Ka4
= (0.00) Depth: 7 00:00:02 1333kN
...
1.Bf1 Qc2 2.Nc3+ Kb4 3.Nd5+ Ka4
= (0.00) Depth: 51 00:00:12 276MN
1.Be4 Qh6 2.Bd3
= (0.07 ++) Depth: 51 00:01:25 4033MN
...
1.Be4 Qh6 2.Bd3
+- (3.25 ++) Depth: 51 00:09:41 29639MN
1.Be4 Qh6 2.Bd3
+- (4.88 ++) Depth: 51 00:10:02 30253MN

No longer PV after about an hour