Position analysis

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

Moderators: hgm, Rebel, chrisw

maelic
Posts: 12
Joined: Wed Jul 05, 2017 12:44 pm
Location: Czech Republic

Position analysis

Post by maelic »

Hello,

quite recently I encountered a position in my ICCF game where there were many ways to win, but there was a particular one that was brutaly crashing and much better than the other options. Oddly enough, all the engines I used for search were not able to find this move on their own but valued it very highly when the move was shown to them.

Without further adue, here is the position I speak of:

q4bk1/pb4p1/1p2pp2/3n3p/2NP4/1P3BP1/PB3P1P/R1R3K1 b - - 0 27

[Event "S-Open/7-pr/90"]
[Site "ICCF"]
[Date "2017.01.31"]
[White "Fremmegaard, Jens Tore"]
[Black "Macurek, Miloslav"]
[Result "0-1"]
[BlackElo "2185"]
[ECO "D30"]
[WhiteElo "1990"]

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 e6 5.Bd3 Nbd7 6.O-O Bd6 7.Nbd2 O-O 8.Re1 c5 9.Qc2 h6 10.b3 cxd4 11.exd4 b6 12.cxd5 Nxd5 13.Qc6 N7f6 14.Qxa8 Qc7 15.Bb2 Bd7 16.Qxf8+ Bxf8 17.Ne5 Bc8 18.Rec1 Qd8 19.Nc6 Qd6 20.Ne4 Nxe4 21.Bxe4 Bb7 22.Ne5 Qd8 23.Nc6 Qe8 24.Ne5 Qa8 25.g3 h5 26.Bf3 f6 27.Nc4 *
(Game continued: Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rg1 b5 32.Ba3 bxc4 33.Bxf8 Kxf8 34.bxc4 g5 35.Rab1 Kf7 36.a4 Qxf2 37.Rh1 g4+ 38.Kh4 Qd2 39.Rb5 Qg2 40.Rb7+ Kg6 41.h3 Qxh1 42.Rg7+ Kxg7 43.Kxh5 Qxh3# 0-1)

I tried to use even the IDeA for the position (I am most probably using it incorrectly so if anybody from you have any experience with it and can give me an advice or forward me to a good source of information about the topic I would be very grateful) and I could not make it to solve it.

What do you think of it?
Thank you for any opinion or advice!
Best regards,
Miloš
Top
zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Position analysis

Post by zullil »

maelic wrote:Hello,

quite recently I encountered a position in my ICCF game where there were many ways to win, but there was a particular one that was brutaly crashing and much better than the other options. Oddly enough, all the engines I used for search were not able to find this move on their own but valued it very highly when the move was shown to them.

Without further adue, here is the position I speak of:

[d]q4bk1/pb4p1/1p2pp2/3n3p/2NP4/1P3BP1/PB3P1P/R1R3K1 b - - 0 27

[pgn]
[Event "S-Open/7-pr/90"]
[Site "ICCF"]
[Date "2017.01.31"]
[White "Fremmegaard, Jens Tore"]
[Black "Macurek, Miloslav"]
[Result "0-1"]
[BlackElo "2185"]
[ECO "D30"]
[WhiteElo "1990"]

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 e6 5.Bd3 Nbd7 6.O-O Bd6 7.Nbd2 O-O 8.Re1 c5 9.Qc2 h6 10.b3 cxd4 11.exd4 b6 12.cxd5 Nxd5 13.Qc6 N7f6 14.Qxa8 Qc7 15.Bb2 Bd7 16.Qxf8+ Bxf8 17.Ne5 Bc8 18.Rec1 Qd8 19.Nc6 Qd6 20.Ne4 Nxe4 21.Bxe4 Bb7 22.Ne5 Qd8 23.Nc6 Qe8 24.Ne5 Qa8 25.g3 h5 26.Bf3 f6 27.Nc4 * [/pgn]
(Game continued: Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rg1 b5 32.Ba3 bxc4 33.Bxf8 Kxf8 34.bxc4 g5 35.Rab1 Kf7 36.a4 Qxf2 37.Rh1 g4+ 38.Kh4 Qd2 39.Rb5 Qg2 40.Rb7+ Kg6 41.h3 Qxh1 42.Rg7+ Kxg7 43.Kxh5 Qxh3# 0-1)

I tried to use even the IDeA for the position (I am most probably using it incorrectly so if anybody from you have any experience with it and can give me an advice or forward me to a good source of information about the topic I would be very grateful) and I could not make it to solve it.

What do you think of it?
Thank you for any opinion or advice!
Top
peter
Posts: 3186
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Position analysis

Post by peter »

Hi Miloslav, thanks for the position!

24 threads of 12x2.67GHz Intel CPU:

Code: Select all

q4bk1/pb4p1/1p2pp2/3n3p/2NP4/1P3BP1/PB3P1P/R1R3K1 b - - 0 1

Analysis by Fritz 15:
...
27...Nb4 28.Be2 Qd8 29.Ne3 h4 30.Bc4 Qd7 31.a4 hxg3 32.hxg3 Be4 33.Rc3 a6 34.Bf1 Bb7 35.Rc4 Nd5 36.Ng2 a5 37.Rcc1 Bc6 38.Be2 Bb4 39.Bd3 
  =  (-0.05)   Depth: 22   00:00:20  175MN
27...Nf4 28.Bxb7[] Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 
  =  (-0.18 ++)   Depth: 22   00:00:30  268MN
...
27...Nf4 28.Bxb7[] Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 
  -/+  (-0.73 ++)   Depth: 22   00:00:38  354MN
...
27...Nf4 28.Bxb7 Nh3+[] 29.Kg2 Qxb7+[] 30.Kxh3 Qf3[] 31.Rh1 b5 32.Nd2 Qxf2 33.Bc3 b4 34.Rhf1 Qe2 35.Rae1 Qg4+ 36.Kg2 bxc3 37.Nf3 Ba3 38.Rf2 Qf5 39.Ree2 Qd3 40.h3 Kh7 41.Rxe6 c2 42.Ne1 Qxd4 
  -/+  (-1.60)   Depth: 24   00:02:45  1668MN
...
27...Nf4 28.Bxb7 Nh3+[] 29.Kg2 Qxb7+[] 30.Kxh3 Qf3[] 31.Rh1 b5[] 32.Nd2 Qxf2[] 33.Bc3 b4[] 34.Rhf1 Qe2 35.Rae1 Qg4+[] 36.Kg2 bxc3[] 37.Nf3 Ba3 38.Rf2 Qf5 39.Ree2 Qd5 40.h4 Bd6 41.Re3 g5 42.hxg5 fxg5 
  -+  (-1.78 ++)   Depth: 26   00:06:49  4275MN
27...Nf4 28.Bxb7 Nh3+[] 29.Kg2 Qxb7+[] 30.Kxh3 Qf3[] 31.Rh1 b5[] 32.Nd2 Qxf2[] 33.Bc3 b4[] 34.Rhf1 Qe2 35.Rae1 Qg4+[] 36.Kg2 bxc3[] 37.Nf3 Ba3 38.Rf2 Qf5 39.Ree2 Qd5 40.h4 Bd6 41.Re3 g5 42.hxg5 fxg5 
  -+  (-1.93 ++)   Depth: 26   00:09:56  6251MN

H5 Tactical Mode:

q4bk1/pb4p1/1p2pp2/3n3p/2NP4/1P3BP1/PB3P1P/R1R3K1 b - - 0 1

Analysis by Houdini 5.01 Pro x64-popc:
...
27...Nb4 28.Be2 h4 29.Nd2 Qe8 30.Rc7 Qb8 31.Rac1 Nxa2 32.R1c2 hxg3 33.hxg3 Nb4 34.Rc1 Bd6 35.Rd7 Bc6 36.Rxc6 Nxc6 37.Bf3 Nb4 38.Ba3 Bf8 39.Bh5 Qc8 40.Bf7+ Kh8 41.Bxe6 Qc2 42.Bxb4 Bxb4 43.Nf3 a5 
  =/+  (-0.64 --)   Depth: 23/49   00:01:26  2246MN
27...Nf4 
  -/+  (-1.02 ++)   Depth: 23/49   00:01:27  2271MN
...
27...Nf4 
  -/+  (-1.59 ++)   Depth: 23/49   00:01:31  2396MN
...
27...Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rh1 b5 32.Nd2 Qxf2 33.Bc3 b4 34.Rhf1 Qe2 35.Rae1 Qg4+ 36.Kg2 bxc3 37.Nf3 Ba3 38.Rf2 h4 39.Rc2 h3+ 40.Kf2 Bb2 41.Ree2 Qf5 42.Ke3 Qg6 43.Rf2 Bc1+ 44.Rxc1 Qh6+ 45.Ng5 Qxg5+ 46.Rf4 
  -+  (-2.04)   Depth: 24/53   00:02:08  3348MN
...
27...Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rh1 b5 32.Nd2 Qxf2 33.Bc3 b4 34.Rhf1 Qe2 35.Rae1 Qg4+ 36.Kg2 bxc3 37.Nf3 Ba3 38.Rf2 h4 39.Re3 Bb2 40.b4 hxg3 41.hxg3 Qf5 42.Ne1 Qd5+ 43.Kg1 Qc4 44.Rfe2 Qxd4 
  -+  (-2.17)   Depth: 25/60   00:03:06  4882MN
...
27...Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rh1 b5 32.Nd2 Qxf2 33.Bc3 b4 34.Rhf1 Qe2 35.Rae1 Qg4+ 36.Kg2 bxc3 37.Nf3 Ba3 38.Rf2 h4 39.Re3 Bb2 40.Rc2 Qf5 41.Ne1 h3+ 42.Kg1 Qd5 43.Nf3 g5 44.Rf2 Kf7 45.g4 Kg6 46.Rfe2 e5 47.dxe5 Qd1+ 48.Ne1 c2 49.Rxc2 Qxg4+ 50.Kf1 
  -+  (-2.31)   Depth: 26/62   00:03:42  5831MN
Last edited by peter on Tue Aug 08, 2017 10:48 pm, edited 2 times in total.
Peter.
Top
Rodolfo Leoni
Posts: 545
Joined: Tue Jun 06, 2017 4:49 pm
Location: Italy

Re: Position analysis

Post by Rodolfo Leoni »

maelic wrote:Hello,

quite recently I encountered a position in my ICCF game where there were many ways to win, but there was a particular one that was brutaly crashing and much better than the other options. Oddly enough, all the engines I used for search were not able to find this move on their own but valued it very highly when the move was shown to them.
Here, SF McBrain and SF Zander find 27. ..h4 rather quickly, while AsmFishW remains stuck on 27. ..Nb4.

No idea about IDeA. You could find Stockfish_savehash by Daniel is an excellent tool (testing it in a corr. tourn. right now). SF Zander has the same persistent hashes option, but I had no time to test it so far.
F.S.I. Chess Teacher
Top
zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Position analysis

Post by zullil »

peter wrote:Hi Miloslav, thanks for the position!

24 threads of 12x2.67GHz Intel CPU:

q4bk1/pb4p1/1p2pp2/3n3p/2NP4/1P3BP1/PB3P1P/R1R3K1 b - - 0 1

Analysis by Fritz 15:
...
27...Nb4 28.Be2 Qd8 29.Ne3 h4 30.Bc4 Qd7 31.a4 hxg3 32.hxg3 Be4 33.Rc3 a6 34.Bf1 Bb7 35.Rc4 Nd5 36.Ng2 a5 37.Rcc1 Bc6 38.Be2 Bb4 39.Bd3
= (-0.05) Depth: 22 00:00:20 175MN
27...Nf4 28.Bxb7[] Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3
= (-0.18 ++) Depth: 22 00:00:30 268MN
...
27...Nf4 28.Bxb7[] Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3
-/+ (-0.73 ++) Depth: 22 00:00:38 354MN
...
27...Nf4 28.Bxb7 Nh3+[] 29.Kg2 Qxb7+[] 30.Kxh3 Qf3[] 31.Rh1 b5 32.Nd2 Qxf2 33.Bc3 b4 34.Rhf1 Qe2 35.Rae1 Qg4+ 36.Kg2 bxc3 37.Nf3 Ba3 38.Rf2 Qf5 39.Ree2 Qd3 40.h3 Kh7 41.Rxe6 c2 42.Ne1 Qxd4
-/+ (-1.60) Depth: 24 00:02:45 1668MN
...
27...Nf4 28.Bxb7 Nh3+[] 29.Kg2 Qxb7+[] 30.Kxh3 Qf3[] 31.Rh1 b5[] 32.Nd2 Qxf2[] 33.Bc3 b4[] 34.Rhf1 Qe2 35.Rae1 Qg4+[] 36.Kg2 bxc3[] 37.Nf3 Ba3 38.Rf2 Qf5 39.Ree2 Qd5 40.h4 Bd6 41.Re3 g5 42.hxg5 fxg5
-+ (-1.78 ++) Depth: 26 00:06:49 4275MN
27...Nf4 28.Bxb7 Nh3+[] 29.Kg2 Qxb7+[] 30.Kxh3 Qf3[] 31.Rh1 b5[] 32.Nd2 Qxf2[] 33.Bc3 b4[] 34.Rhf1 Qe2 35.Rae1 Qg4+[] 36.Kg2 bxc3[] 37.Nf3 Ba3 38.Rf2 Qf5 39.Ree2 Qd5 40.h4 Bd6 41.Re3 g5 42.hxg5 fxg5
-+ (-1.93 ++) Depth: 26 00:09:56 6251MN
A lot faster than asmFish, which took 54 billion nodes:

Code: Select all

info depth 40 seldepth 84 multipv 1 time 1259895 nps 42905688 score cp 265 lowerbound nodes 54056662456 hashfull 999 tbhits 0 pv d5f4
info depth 40 currmove d5f4 currmovenumber 1
info depth 40 seldepth 84 multipv 1 time 1263894 nps 42913120 score cp 315 lowerbound nodes 54237635064 hashfull 999 tbhits 0 pv d5f4
info depth 40 currmove d5f4 currmovenumber 1
info depth 40 seldepth 84 multipv 1 time 1271838 nps 42925986 score cp 380 lowerbound nodes 54594900613 hashfull 999 tbhits 0 pv d5f4
info depth 40 currmove d5f4 currmovenumber 1
info depth 40 seldepth 84 multipv 1 time 1407027 nps 43165010 score cp 462 lowerbound nodes 60734334658 hashfull 999 tbhits 0 pv d5f4

Code: Select all

info depth 40 seldepth 84 multipv 1 time 1485832 nps 43324318 score cp 478 nodes 64372659285 hashfull 999 tbhits 0 pv d5f4 f3b7 f4h3 g1f1 a8b7 f1e2 b7g2 c1f1 g2h2 b2c1 h3g1 f1g1 h2g1 c1b2 g1h2 a1d1 h5h4 g3h4 h2h4 d1d3 h4g4 f2f3 g4g1 b2c3 g1g2 e2d1 g2a2 c3d2 a2a1 d1e2 a1h1 d2e1 g8f7 c4e3 f8d6 d3d1 h1h5 e1f2 h5b5 e3c4 d6f4 d1d3 b5a6 f2e3 a6a2 c4d2 f4e3 d3e3
Top
Rodolfo Leoni
Posts: 545
Joined: Tue Jun 06, 2017 4:49 pm
Location: Italy

Re: Position analysis

Post by Rodolfo Leoni »

zullil wrote:
peter wrote:Hi Miloslav, thanks for the position!

24 threads of 12x2.67GHz Intel CPU:

q4bk1/pb4p1/1p2pp2/3n3p/2NP4/1P3BP1/PB3P1P/R1R3K1 b - - 0 1

Analysis by Fritz 15:
...
27...Nb4 28.Be2 Qd8 29.Ne3 h4 30.Bc4 Qd7 31.a4 hxg3 32.hxg3 Be4 33.Rc3 a6 34.Bf1 Bb7 35.Rc4 Nd5 36.Ng2 a5 37.Rcc1 Bc6 38.Be2 Bb4 39.Bd3
= (-0.05) Depth: 22 00:00:20 175MN
27...Nf4 28.Bxb7[] Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3
= (-0.18 ++) Depth: 22 00:00:30 268MN
...
27...Nf4 28.Bxb7[] Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3
-/+ (-0.73 ++) Depth: 22 00:00:38 354MN
...
27...Nf4 28.Bxb7 Nh3+[] 29.Kg2 Qxb7+[] 30.Kxh3 Qf3[] 31.Rh1 b5 32.Nd2 Qxf2 33.Bc3 b4 34.Rhf1 Qe2 35.Rae1 Qg4+ 36.Kg2 bxc3 37.Nf3 Ba3 38.Rf2 Qf5 39.Ree2 Qd3 40.h3 Kh7 41.Rxe6 c2 42.Ne1 Qxd4
-/+ (-1.60) Depth: 24 00:02:45 1668MN
...
27...Nf4 28.Bxb7 Nh3+[] 29.Kg2 Qxb7+[] 30.Kxh3 Qf3[] 31.Rh1 b5[] 32.Nd2 Qxf2[] 33.Bc3 b4[] 34.Rhf1 Qe2 35.Rae1 Qg4+[] 36.Kg2 bxc3[] 37.Nf3 Ba3 38.Rf2 Qf5 39.Ree2 Qd5 40.h4 Bd6 41.Re3 g5 42.hxg5 fxg5
-+ (-1.78 ++) Depth: 26 00:06:49 4275MN
27...Nf4 28.Bxb7 Nh3+[] 29.Kg2 Qxb7+[] 30.Kxh3 Qf3[] 31.Rh1 b5[] 32.Nd2 Qxf2[] 33.Bc3 b4[] 34.Rhf1 Qe2 35.Rae1 Qg4+[] 36.Kg2 bxc3[] 37.Nf3 Ba3 38.Rf2 Qf5 39.Ree2 Qd5 40.h4 Bd6 41.Re3 g5 42.hxg5 fxg5
-+ (-1.93 ++) Depth: 26 00:09:56 6251MN
A lot faster than asmFish, which took 54 billion nodes:

Code: Select all

info depth 40 seldepth 84 multipv 1 time 1259895 nps 42905688 score cp 265 lowerbound nodes 54056662456 hashfull 999 tbhits 0 pv d5f4
info depth 40 currmove d5f4 currmovenumber 1
info depth 40 seldepth 84 multipv 1 time 1263894 nps 42913120 score cp 315 lowerbound nodes 54237635064 hashfull 999 tbhits 0 pv d5f4
info depth 40 currmove d5f4 currmovenumber 1
info depth 40 seldepth 84 multipv 1 time 1271838 nps 42925986 score cp 380 lowerbound nodes 54594900613 hashfull 999 tbhits 0 pv d5f4
info depth 40 currmove d5f4 currmovenumber 1
info depth 40 seldepth 84 multipv 1 time 1407027 nps 43165010 score cp 462 lowerbound nodes 60734334658 hashfull 999 tbhits 0 pv d5f4

Code: Select all

info depth 40 seldepth 84 multipv 1 time 1485832 nps 43324318 score cp 478 nodes 64372659285 hashfull 999 tbhits 0 pv d5f4 f3b7 f4h3 g1f1 a8b7 f1e2 b7g2 c1f1 g2h2 b2c1 h3g1 f1g1 h2g1 c1b2 g1h2 a1d1 h5h4 g3h4 h2h4 d1d3 h4g4 f2f3 g4g1 b2c3 g1g2 e2d1 g2a2 c3d2 a2a1 d1e2 a1h1 d2e1 g8f7 c4e3 f8d6 d3d1 h1h5 e1f2 h5b5 e3c4 d6f4 d1d3 b5a6 f2e3 a6a2 c4d2 f4e3 d3e3
Agreed. After few manual piece moving with the "Never clear hash" option turned on, this happens on my old and slow PC.

Code: Select all

FEN: q4bk1/pb4p1/1p2pp2/3n3p/2NP4/1P3BP1/PB3P1P/R1R3K1 b - - 0 27

Stockfish_x64_modern_170724_savehash:
 8/11	00:00	 4k	1,989k	+1.34	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.d5 Ng5 31.Rf1 Qxd5+ 32.f3 Qf5
 9/12	00:00	 5k	2,644k	+2.16	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.d5 exd5 31.Nd2 Qd7 32.Rf1 Qf5
 10/18	00:00	 7k	2,209k	+2.27	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.d5 Ng5 31.Rf1 Qxd5+ 32.f3 Qf5 33.Kh1 Nxf3
 11/17	00:00	 8k	2,786k	+2.27	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.d5 Ng5 31.Rf1 Qxd5+ 32.f3 Qf5 33.Kh1 Nxf3 34.Nd2
 12/20	00:00	 11k	3,532k	+2.35	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.d5 Ng5 31.Rf1 Qxd5+ 32.f3 Qf5 33.Kh1 Nxf3 34.Nd2 Qc2 35.Nxf3
 13/19	00:00	 13k	3,333k	+2.47	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.d5 Ng5 31.Rf1 Qxd5+ 32.f3 Qf5 33.Kh1 Nxf3 34.Nd2 Qc2 35.Nxf3 Qxb2
 14/26	00:00	 23k	3,780k	+2.85	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.d5 Ng5 31.Rf1 Qxd5+ 32.f3 Qf5 33.Kh1 Nxf3 34.Nd2 Qc2 35.Nxf3 Qxb2 36.Nh4 Bc5
 15/27	00:00	 36k	3,954k	+2.77	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.d5 Ng5 31.Rf1 Qxd5+ 32.f3 Qf5 33.Kh1 Nxf3 34.Nd2 Qc2 35.Nxf3 Qxb2 36.Nh4 Bc5 37.Rad1 Qxa2
 16/31	00:00	 57k	4,053k	+2.77	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.d5 Ng5 31.Rf1 Qxd5+ 32.f3 Qf5 33.Kh1 Nxf3 34.Nd2 Qc2 35.Nxf3 Qxb2 36.Nh4 Bc5 37.Rfd1 e5 38.Ng2 Bd4
 17/28	00:00	 63k	4,177k	+3.02	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.d5 Ng5 31.Rf1 Qxd5+ 32.f3 Qf5 33.Kh1 Nxf3 34.Nd2 Qc2 35.Nxf3 Qxb2 36.Nh4 Bc5 37.Rfd1 e5 38.Ng2 Bd4 39.Re1 g5
 18/32	00:00	 389k	4,421k	+3.02	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.d5 Ng5 31.Rf1 Qxd5+ 32.f3 Qf5 33.Kh1 Nxf3 34.Nd2 Qc2 35.Nxf3 Qxb2 36.Rfb1 Qe2 37.Rf1 Bc5 38.a4 Qd3 39.Rab1 e5 40.Nh4 Qd5+ 41.Ng2
 19/34	00:00	 580k	4,293k	+3.09	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.d5 Ng5 31.Rf1 Qxd5+ 32.f3 Qf5 33.Kh1 Nxf3 34.Nd2 Qc2 35.Nxf3 Qxb2 36.Rfb1 Qe2 37.Rf1 e5 38.Rad1 Bc5 39.a4 Qc2 40.Rd8+ Kh7 41.Rd7 Qxb3
 20/32	00:00	 619k	4,296k	+3.23	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.d5 Ng5 31.Rf1 Qxd5+ 32.f3 Qf5 33.Kh1 Nxf3 34.Nd2 Qc2 35.Nxf3 Qxb2 36.Rfb1 Qe2 37.Nh4 Bc5 38.Re1 Qb2 39.Reb1 Qc2 40.Rc1 Qe4+ 41.Ng2 e5 42.Re1 Qc2 43.Rec1
 21/43	00:00	 1,041k	4,469k	+3.09	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.d5 Ng5 31.Rf1 Qxd5+ 32.f3 Qf5 33.Kh1 Qh3 34.Nd2 Bd6 35.f4 h4 36.gxh4 Qxh4 37.Nf3 Nxf3 38.Rxf3 Bxf4 39.h3 Bg3 40.Kg2 Be1 41.Bd4 Qg5+ 42.Kf1 Qd5 43.Ke2 Bh4 44.Be3 Qb5+ 45.Kd2 Kf7 46.Rff1 Bg3 47.h4 e5
 22/48	00:00	 3,476k	4,775k	+3.37	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rh1 b5 32.Nd2 Qxf2 33.Bc3 b4 34.Rhf1 Qe2 35.Rae1 Qg4+ 36.Kg2 bxc3 37.Nf3 Qf5 38.Rf2 Qd5 39.Rc1 g5 40.Kf1 Qb5+ 41.Kg1 Qd3 42.Ne1 Qxd4 43.Nc2 Qb6 44.b4 g4
 23/39	00:00	 3,499k	4,767k	+3.37	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rh1 b5 32.Nd2 Qxf2 33.Bc3 b4 34.Rhf1 Qe2 35.Rae1 Qg4+ 36.Kg2 bxc3 37.Nf3 Qf5 38.Rf2 Qd5 39.Rc1 g5 40.Kf1 Qb5+ 41.Kg1 Qd3 42.Ne1 Qxd4 43.Nc2 Qb6 44.b4 g4 45.Rd1 Kf7 46.Rd4 f5
 24/43	00:00	 3,554k	4,757k	+3.37	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rh1 b5 32.Nd2 Qxf2 33.Bc3 b4 34.Rhf1 Qe2 35.Rae1 Qg4+ 36.Kg2 bxc3 37.Nf3 Qf5 38.Rf2 Qd5 39.Rc1 g5 40.Kf1 Qb5+ 41.Kg1 Qd3 42.Ne1 Qxd4 43.Nc2 Qb6 44.b4 g4 45.Rd1 Kf7 46.Rd4 f5 47.a3 Qc6 48.Rd3 Bg7
 25/47	00:00	 3,637k	4,754k	+3.37	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rh1 b5 32.Nd2 Qxf2 33.Bc3 b4 34.Rhf1 Qe2 35.Rae1 Qg4+ 36.Kg2 bxc3 37.Nf3 Qf5 38.Rf2 Qd5 39.Rc1 g5 40.Kf1 Qb5+ 41.Kg1 Qd3 42.Ne1 Qxd4 43.Nc2 Qb6 44.b4 g4 45.Rd1 Kf7 46.Rd4 f5 47.a3 Qc6 48.Rd3 Bg7 49.Re2 Bf6 50.a4 e5
 26/52	00:01	 8,083k	4,630k	+3.59	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.f3 g5 31.Nd2 g4 32.Rc2 Ng5 33.Rac1 gxf3+ 34.Kf2 Nh3+ 35.Kf1 Qa6+ 36.Rc4 Bh6 37.Nxf3 Bxc1 38.Bxc1 Qxa2 39.Nd2 Qa5 40.Rc8+ Kf7 41.Nf3 Qd5 42.Kg2 Ng5 43.Bxg5 fxg5 44.Rc7+ Kg6
 27/49	00:03	 15,997k	4,509k	+3.63	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rh1 b5 32.Nd2 Qxf2 33.Bc3 b4 34.Rhf1 Qe2 35.Rae1 Qg4+ 36.Kg2 bxc3 37.Nf3 Qf5 38.Re3 g5 39.Rc1 g4 40.Ng1 Qd5+ 41.Kf1 Bh6 42.Rcxc3 Bxe3 43.Rxe3 Kf7 44.Rc3 Qxd4 45.Ne2 Qe4 46.Rc7+ Kg6 47.Rxa7 e5 48.Rc7 Qf3+ 49.Ke1 Qh1+ 50.Kd2 Qxh2
 28/48-	00:03	 16,213k	4,505k	+3.56	27. ... Nf4 28.Bxb7
 28/48	00:03	 16,520k	4,498k	+3.54	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rh1 b5 32.Nd2 Qxf2 33.Bc3 b4 34.Rhf1 Qe2 35.Rae1 Qg4+ 36.Kg2 bxc3 37.Nf3 Qf5 38.Re3 g5 39.Rc1 g4 40.Ng1 Bh6 41.Rcxc3 Bxe3 42.Rxe3 Qd5+ 43.Kf2 Qxd4
 29/40	00:04	 18,540k	4,486k	+3.50	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rh1 b5 32.Nd2 Qxf2 33.Bc3 b4 34.Rhf1 Qe2 35.Rae1 Qg4+ 36.Kg2 bxc3 37.Nf3 Qf5 38.Re3 g5 39.Rc1 g4 40.Ng1 Qd5+ 41.Kf1 Bh6 42.Rexc3 Bxc1 43.Rxc1 Qxd4 44.Ne2 Qd3 45.Rc8+ Kf7 46.Rc7+ Kg6 47.Rxa7
 30/46+	00:06	 28,168k	4,444k	+3.58	27. ... Nf4
 30/52+	00:10	 46,580k	4,413k	+3.65	27. ... Nf4
 30/54	00:12	 54,549k	4,374k	+3.62	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rh1 b5 32.Nd2 Qxf2 33.Bc3 b4 34.Rhf1 Qe2 35.Rae1 Qg4+ 36.Kg2 bxc3 37.Nf3 Qf5 38.Re2 Qd5 39.Ref2 g5 40.Kg1 g4 41.Ne1 Qxd4 42.Nc2 Qb6 43.b4 f5 44.a3 Kf7 45.Rd1 Bh6 46.Rd3 Bd2 47.a4 Qa6 48.Rd7+ Ke8 49.Rfxd2 cxd2 50.Rxd2
 31/54	00:14	 63,488k	4,330k	+3.62	27. ... Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rh1 b5 32.Nd2 Qxf2 33.Bc3 b4 34.Rhf1 Qe2 35.Rae1 Qg4+ 36.Kg2 bxc3 37.Nf3 Qf5 38.Re2 Qd5 39.Ref2 g5 40.Kg1 g4 41.Ne1 Qxd4 42.Nc2 Qb6 43.b4 f5 44.a3 Kf7 45.Rd1 Bh6 46.Rd3 Bd2 47.a4 Qa6 48.Rd7+ Ke8 49.Rfxd2 cxd2 50.Rxd2
F.S.I. Chess Teacher
Top
peter
Posts: 3186
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Position analysis

Post by peter »

Edited to add H5 Tactical while you answered, Louis, and here is Sting:

Code: Select all

q4bk1/pb4p1/1p2pp2/3n3p/2NP4/1P3BP1/PB3P1P/R1R3K1 b - - 0 1

Analysis by Sting SF 8.5 64bit:
...
27...Nb4 28.Be2 h4 29.Nd2 Qd8 30.a3 Nc6 31.Bf3 Nxd4 32.Bxd4 Qxd4 33.Bxb7 Qxd2 34.b4 Kf7 35.Rc7+ Kg6 36.Be4+ f5 37.Bf3 Bd6 38.Rd1 Qxd1+ 39.Bxd1 Bxc7 40.gxh4 Bf4 41.Kg2 e5 42.Bb3 e4 43.Bd5 Kf6 44.h3 
  =/+  (-0.52)   Depth: 29   00:00:24  245MN
27...Nf4 
  =/+  (-0.60 ++)   Depth: 30   00:00:29  318MN
...
27...Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.Kxh3 Qf3 31.Rh1 b5 32.Nd2 Qxf2 33.Rad1 g5 34.d5 exd5 35.Bc1 g4+ 36.Kh4 Qf5 37.Nb1 Qxb1 38.Rxd5 Qxa2 39.Kxh5 Qxb3 40.Rhd1 Qf3 41.R1d3 Qe2 42.Be3 a5 43.Kg6 a4 44.Kxf6 Bg7+ 45.Kf5 b4 46.Rd8+ Bf8 
  -+  (-2.02)   Depth: 30   00:00:55  730MN
...
27...Nf4 28.Bxb7 Nh3+ 29.Kf1 Qxb7 30.Ke2 Qg2 31.Rf1 Qxh2 32.Ba3 Bxa3 33.Nxa3 h4 34.gxh4 Nf4+ 35.Kf3 Qxh4 36.Nc2 Nd5 37.Ke2 Qe4+ 38.Kd2 Nf4 39.Rad1 Qd3+ 40.Kc1 Ne2+ 41.Kb2 Qc3+ 42.Kb1 Nf4 43.Rfe1 Nd3 44.Rxd3 Qxd3 45.Rxe6 Kf7 
  -+  (-2.86)   Depth: 32   00:02:30  2304MN
...
27...Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.f3 g5 31.Nd2 g4 32.Rc2 Ng5 33.Rf1 Bb4 34.Bc3 Nxf3 35.Nxf3 Qe4 36.Bxb4 gxf3+ 37.Rxf3 Qxc2+ 38.Rf2 
  -+  (-3.39)   Depth: 34   00:05:29  5305MN
Peter.
Top
Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Position analysis

Post by Vinvin »

Nice one !

The good old Houdini 1.5 (from 2011) ! :-)
4 runs on 6*4GHz : 42s, 11s, 2m05s and 40s :

Code: Select all

FEN: q4bk1/pb4p1/1p2pp2/3n3p/2NP4/1P3BP1/PB3P1P/R1R3K1 b - - 0 1

Houdini_15_x64:
...
 19/45	00:04	 48 359k	10 953k	-0,41	1. ... Nb4 2.Be2 h4 3.Ne3 Bf3 4.Bf1 Qe4 5.Rc8 Qb7 6.Rc4 b5 7.Rc3 Nc6 8.Nc2 Bd5 9.gxh4 Bd6 10.Rc1 Qb8 11.Rg3 Bxg3 12.hxg3
 20/45	00:04	 52 204k	10 985k	-0,41	1. ... Nb4 2.Be2 h4 3.Ne3 Bf3 4.Bf1 Qe4 5.Rc8 Qb7 6.Rc4 b5 7.Rc3 Be4 8.gxh4 Nc6 9.Rcc1 Bd6 10.Bg2 Bxg2 11.Nxg2 Nb4 12.Ne1 Qe4
 21/45	00:05	 60 976k	11 231k	-0,41	1. ... Nb4 2.Be2 h4 3.Ne3 Bf3 4.Bf1 Qe4 5.Rc8 Qb7 6.Rc4 b5 7.Rc3 Be4 8.gxh4 Nc6 9.Rcc1 Bd6 10.Bg2 Bxg2 11.Nxg2 Nb4 12.Ne1 Qe4
 22/45+	00:06	 79 982k	11 432k	-0,35	1. ... Nb4 2.Be2
 22/53	00:11	 133 993k	11 890k	-0,37	1. ... Nb4 2.Be2 h4 3.Ne3 Bf3 4.Bc4 Nd5 5.Nxd5 Bxd5 6.Bb5 Qb7 7.Re1 h3 8.Bf1 Bb4 9.Rec1 Bg2 10.Bd3 g5 11.Bc3 Ba3 12.Re1 Qf3 13.Re3 Qc6 14.Bc4 Bd5
 23/53+	00:14	 175 953k	11 923k	-0,32	1. ... Nb4 2.Be2
 23/60-	00:42	 537 752k	12 754k	-0,43	1. ... Nf4
 23/68-	01:44	 1 389 864k	13 302k	-2,00	1. ... Nf4



Houdini_15_x64:
...
 19/44	00:03	 40 431k	12 341k	-0,37	1. ... Nb4 2.Be2 h4 3.Ne3 Bf3 4.Bf1 Qe4 5.Rc8 Qb7 6.Rc3 Qd7 7.a3 Nc6 8.Rac1 Qxd4 9.R3c2 Qd7 10.Bb5 Bc5 11.b4 Bxe3 12.fxe3
 20/44	00:03	 47 214k	12 427k	-0,36	1. ... Nb4 2.Be2 h4 3.Nd2 Qd8 4.a3 Nc6 5.Bf3 Nxd4 6.Bxd4 Qxd4 7.Bxb7 Qxd2 8.b4 h3 9.Rd1 Qc3 10.Rdc1 Qe5 11.Re1 Qc7 12.Be4 f5 13.Rac1 Qe5 14.Bg2 Qb2
 20/62-	00:11	 138 415k	12 513k	-0,42	1. ... Nf4
 20/62-	00:11	 143 595k	12 516k	-0,54	1. ... Nf4
 20/62	00:11	 146 943k	12 505k	-0,52	1. ... Nf4 2.Bxb7 Nh3+ 3.Kg2 Qxb7+ 4.Kxh3 Qf3 5.d5 g5 6.Bd4 Qf5+ 7.Kg2 Qxd5+ 8.Kg1 Qxd4 9.Rd1 Qe4 10.Re1 Qc6 11.Rad1 Bc5 12.Nd6 h4 13.Ne4 Kf7 14.Nxc5 bxc5 15.gxh4 gxh4 16.Re3 e5 17.Red3
 21/62-	00:13	 168 045k	12 593k	-0,60	1. ... Nf4
 21/62-	00:15	 191 637k	12 639k	-0,75	1. ... Nf4
 21/62-	00:19	 253 687k	12 784k	-1,10	1. ... Nf4
 21/70	00:56	 739 168k	13 002k	-2,05	1. ... Nf4 2.Bxb7 Nh3+ 3.Kg2 Qxb7+ 4.Kxh3 Qf3 5.Ne3 Qxf2 6.Rc2 Qxe3 7.Rf1 Qe4 8.Rff2 Bd6 9.Rce2 Qd5 10.Kh4 Qg5+ 11.Kh3 Qg4+ 12.Kg2 h4 13.Rf3 hxg3 14.h3 Qg5 15.Bc3 Qd5 16.Be1 Qxd4 17.Rd2 Qb4 18.Re2 Qc5 19.Rd2 e5 20.Rfd3 Qc6+ 21.Kxg3 Bc7 22.Rd5 e4+ 23.Kg2 e3
 22/70-	01:02	 809 387k	12 961k	-2,16	1. ... Nf4
 22/70	01:08	 890 250k	12 914k	-2,24	1. ... Nf4 2.Bxb7 Nh3+ 3.Kg2 Qxb7+ 4.Kxh3 Qf3 5.Ne3 Qxf2 6.Rc2 Qxe3 7.Rf1 Qe4 8.Rff2 Bd6 9.Rc8+ Kh7 10.Rc4 Qg4+ 11.Kg2 h4 12.Rf3 h3+ 13.Kf2 Qe4 14.Rc1 Bb4 15.Bc3 Bxc3 16.Rcxc3 Qxd4+ 17.Rce3 g5 18.g4 Qxg4 19.Rxh3+ Kg6 20.Rd3 Qf4+ 21.Kg2 Qe4+ 22.Kf2 g4
 23/70	01:23	 1 083 057k	12 914k	-2,27	1. ... Nf4 2.Bxb7 Nh3+ 3.Kg2 Qxb7+ 4.Kxh3 Qf3 5.Rg1 b5 6.Nd2 Qxf2 7.Raf1 Qxd2 8.Rg2 Qg5 9.Rgf2 Qd5 10.Bc1 g5 11.Rxf6 Be7 12.Bxg5 Qxg5 13.R6f4 Bd6 14.Re4 Kg7 15.Rfe1 Bb4 16.R1e2 Qf5+ 17.Kg2 Qd5 18.Kh3 Bc3 19.Re5 Qh1 20.Rg5+ Kf6
 24/70	01:35	 1 231 294k	12 949k	-2,23	1. ... Nf4 2.Bxb7 Nh3+ 3.Kg2 Qxb7+ 4.Kxh3 Qf3 5.Rg1 b5 6.Nd2 Qxf2 7.Raf1 Qxd2 8.Rg2 Qg5 9.Rgf2 Qd5 10.Bc1 g5 11.Rxf6 Be7 12.Bxg5 Qxg5 13.R6f4 Bd6 14.Re4 Kg7 15.Rf2 Qd5 16.Rfe2 a5 17.Rxe6 Qxd4 18.Kg2 Bc5 19.R2e3
 25/70-	02:07	 1 674 053k	13 079k	-2,35	1. ... Nf4
 25/70-	03:11	 2 511 455k	13 104k	-2,59	1. ... Nf4



Houdini_15_x64:
...
 24/58	01:25	 1 076 232k	12 573k	-0,42	1. ... Nb4 2.Be2 Be4 3.Nd2 Nc2 4.Rab1 Bg6 5.Rd1 Nb4 6.Rbc1 Nxa2 7.Rc7 Qb8 8.Rc6 Bf7 9.Ra1 Nb4 10.Rc3 Qd8 11.Rc4 a5 12.Rac1 Bc5 13.dxc5 Qxd2
 25/58	01:44	 1 318 253k	12 617k	-0,47	1. ... Nb4 2.Be2 Be4 3.Nd2 Nc2 4.Rab1 Bg6 5.Rd1 Nb4 6.Rbc1 Nxa2 7.Rc7 Qb8 8.Rc6 Bf7 9.Ra1 Nb4 10.Rc3 Qd8 11.Rc4 b5 12.Rcc1
 25/63-	02:05	 1 591 561k	12 714k	-0,48	1. ... Nf4
 25/73-	05:16	 4 171 771k	13 188k	-2,09	1. ... Nf4



Houdini_15_x64:
...
 22/56	00:19	 256 625k	12 954k	-0,37	1. ... Nb4 2.Be2 h4 3.Ne3 Qe8 4.Rc7 Qb8 5.Rc3 Qd6 6.Rcc1 Be4 7.Rd1 Kf7 8.Nc4 Qc6 9.Ne3 Qd7 10.gxh4 Bd6 11.a3 Nd5 12.Rac1
 23/56+	00:22	 292 613k	12 980k	-0,31	1. ... Nb4 2.Be2
 23/60-	00:40	 539 848k	13 190k	-0,42	1. ... Nf4
 23/87-	01:46	 1 461 622k	13 674k	-1,99	1. ... Nf4
Top
maelic
Posts: 12
Joined: Wed Jul 05, 2017 12:44 pm
Location: Czech Republic

Re: Position analysis

Post by maelic »

Thank you very much for answers - it seems you had no difficulty finding this move at all!!
I would assume that if I was able to compute a many nodes as you, the result evaluation should be the same. For some reason that is not the case though.
For example Houdini 5.01 Tactical:

Code: Select all

8.51 27...Nb4 (depth 26, 1/29), 2G nodes (3,8M nps)
0.00: -0.31/10 27...Nb4 28.Be2 Qd8 29.Ne3 g6 30.Bc4 Qd7 31.d5 Nxd5 32.Rc2
0.00: -0.23/11 27...Nb4 28.Be2 Qd8 29.Ne3 g6 30.a3 Nd5 31.Ng2 f5 32.Rc2 g5 33.Bxh5 Nf6
0.00: -0.08/12 27...Nb4 28.Be2 Qd8 29.Ne3 g6 30.a3 Nd5 31.Ng2 f5 32.Re1 Be7 33.Rac1
0.00: -0.21/13 27...Nb4 28.Be2 Qd8 29.Ne3 h4 30.Re1 Kf7 31.Rac1 Be4 32.f3 Bd3 33.Kf2 Bxe2
0.01: -0.16/14 27...Nb4 28.Be2 Qd8 29.Ne3 h4 30.a3 Nd5 31.Nc4 Kf7 32.Rc2 Be7 33.Re1 hxg3 34.fxg3 b5 35.Nd2 Ne3 36.Bh5+
0.03: -0.08/15 27...Nb4 28.Be2 Qd8 29.Ne3 h4 30.Bc4 Kf7 31.Re1 hxg3 32.hxg3 Qd7 33.Rec1 b5 34.Be2 Nd5
0.04: -0.17/16 27...Nb4 28.Be2 h4 29.Nd2 Nd5 30.Rc2 Qe8 31.Rac1 Qg6 32.Bf3 Qh7 33.a3 g5 34.b4 f5 35.Bxd5
0.07: 0.00/17 27...Nb4 28.Be2 h4 29.Nd2 Nd5 30.Rc2 Qe8 31.Rac1 Qg6 32.Bf3 Qh7 33.Ne4 Qf5 34.Nd2 Qh7
0.19: -0.22/18 27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rc3 Nxb2 31.Nxb2 Qd5 32.Re3 Bh1 33.Bf1 Qxd4 34.Kxh1 Qxb2 35.Rae1 Bxa3 36.Rxe6 Qxb3 37.Re8+ Kh7 38.R8e3
0.32: -0.15/19 27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rc3 Nxb2 31.Nxb2 Qd5 32.Re3 Bh1 33.Bf1 Qxd4 34.Kxh1 Qxb2 35.Rae1 Qxf2 36.Rxe6 Bxa3 37.Bg2 Qd4 38.R6e4 Qd2 39.R4e2 Qd7 40.Rc2 Bc5
0.38: -0.33/20 27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rc3 Nxb2 31.Nxb2 Qd5 32.Re3 Bh1 33.Bf1 Qxd4 34.Kxh1 Qxb2 35.Rae1 Bc5 36.Rf3 e5 37.Kg2 Qxa3 38.Bc4+ Kh7 39.Re4
0.52: -0.42/21 27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rc3 Nxb2 31.Nxb2 Qd5 32.Re3 Bh1 33.Bf1 Qxd4 34.Kxh1 Qxb2 35.Rae1 Qxf2 36.Bh3 Bc5 37.R1e2 Qxe3 38.Rxe3 Bxe3 39.Bxe6+ Kf8 40.Kg2 Bc1 41.a4 g6 42.Kf2 Bd2 43.Kf3
1.24: -0.50/22 27...Nb4 28.Be2 Qd8 29.Ne3 Qd7 30.Bc4 h4 31.a4 Be4 32.Ba3 hxg3 33.hxg3 Qxd4 34.Bxe6+ Kh7 35.Bh3 Qe5 36.Nc4 Qh5 37.Bg2 Bxg2 38.Kxg2 Qd5+ 39.Kg1 Qf3 40.Ne3 Bc5 41.Bxb4 Bxe3 42.fxe3
2.00: -0.61/23 27...Nb4 28.Be2 Qd8 29.Ne3 Qd7 30.a4 h4 31.a5 b5 32.d5 a6 33.Bf3 Nxd5 34.Rd1 Bd6 35.Nxd5 Bxd5 36.Bxd5 exd5 37.Rxd5 Qe6 38.Rd4 hxg3
4.06: -0.62/24 27...Nb4 28.Be2 Qe8 29.Ne3 Qd7 30.a3 Nd5 31.Ng2 f5 32.Nh4 Nf6 33.b4 Qd5 34.Bf3 Ne4 35.Bg2 g5 36.Ng6 Qb3 37.Rab1 Qd3 38.d5 Nd2 39.Rd1 Bxd5 40.Bxd5 exd5 41.Nxf8 Kxf8
8.48: -0.95/25 27...Nb4 28.Be2 Qe8 29.Ne3 Qg6 30.Rc7 Qe4 31.Rxb7 Qxb7 32.a3 Nd5 33.Bf3 g6 34.Nxd5 exd5 35.Rc1 Qd7 36.Kg2 Kg7 37.Rc3 a5 38.Bc1 Be7 39.Rc2 Bd6 40.h4 Bb8 41.Rc3
Or mateFishW_2017-08-07_bmi2:

Code: Select all

13.01 27...h4 (depth 33, 1/29), 3G nodes (3,9M nps), 1,6K tbhits
0.00: +0.27/3 27...g6 28.a4 Bh6
0.00: +0.47/4 27...g6 28.a4 Bb4 29.Be4
0.00: +0.07/5 27...Nb4 28.Be2 Bf3 29.Bxf3 Qxf3
0.00: +0.26/6 27...Qe8 28.Ne3 Bd6 29.Rab1 b5 30.Nxd5
0.00: -0.13/7 27...Nb4 28.Bxh5 Nd3 29.Rd1 Nxb2 30.Nxb2 Bh1
0.00: -0.02/8 27...Nb4 28.Be2 Be4 29.Rd1 Bg6 30.Rd2 Nd5 31.Bf3
0.00: -0.12/9 27...Nb4 28.Be2 Be4 29.Ne3 Nd3 30.Bxd3 Bxd3 31.Rc7 a5
0.00: -0.02/10 27...Nb4 28.Be2 g6 29.a3 Nd5 30.Bf3 Ne7 31.Bxb7 Qxb7 32.Nd6 Qd5
0.00: +0.10/11 27...Nb4 28.Be2 Qe8 29.Nd2 Qd7 30.a3 Nc6 31.Bb5 Be7 32.b4 Qd5 33.Bc4
0.00: -0.17/12 27...Nb4 28.Be2 Qe8 29.Nd2 Qd7 30.a3 Nc6 31.Bf3 Nxd4 32.Bxd4 Qxd4 33.Bxb7 Qxd2
0.00: -0.29/13 27...Nb4 28.Bxb7 Qxb7 29.Rd1 Qf3 30.Ne3 h4 31.Ba3 hxg3 32.hxg3 Nd3 33.Rxd3 Bxa3 34.Re1 Bb4 35.Rc1
0.00: -0.41/14 27...Nb4 28.Be2 Qe8 29.Nd2 Qd7 30.a3 Nc6 31.Bf3 e5 32.Re1 exd4 33.Rad1 Ne5 34.Bxb7
0.00: -0.45/15 27...Nb4 28.Be2 Qe8 29.Nd2 Qd7 30.a3 Nc6 31.Bf3 e5 32.Re1 exd4 33.Rad1 h4 34.Nc4 hxg3 35.hxg3 b5 36.Nd2
0.00: -0.30/16 27...h4 28.Bg4 Qe8 29.a4 Bb4 30.Bf3 Qf7 31.Bg2 Qh5 32.a5 h3 33.Bh1 b5 34.Ne3 Qe2 35.a6
0.01: -0.43/17 27...Nb4 28.Be2 Be4 29.Rd1 Bf3 30.Bxf3 Qxf3 31.Ne3 h4 32.Ba3 Nd5 33.Nxd5 Qxd5 34.Bxf8 h3 35.Kf1 Qg2+ 36.Ke2 Qe4+ 37.Kf1 Kxf8
0.03: -0.51/18 27...Nb4 28.Be2 Be4 29.Nd2 Bd3 30.Bxh5 Nc2 31.Be2 Bg6 32.Bh5 Bf5 33.Rxc2 Bxc2 34.Rc1 Bf5 35.Bf3 Qd8 36.Nc4 Bg6 37.Ne3 Kf7
0.03: -0.52/19 27...Nb4 28.Be2 Be4 29.Nd2 Bd3 30.Bxh5 Nc2 31.Be2 Bf5 32.Bf3 Qd8 33.Rxc2 Bxc2 34.Nc4 Bb4 35.Ne3 Bg6 36.Rc1 Kf7 37.Rd1 Qe7 38.h4 a5
0.03: -0.76/20 27...Nb4 28.Be2 Be4 29.Nd2 Bd3 30.Bxh5 Nc2 31.Rxc2 Bxc2 32.Bf3 Qd8 33.Nc4 b5 34.Ne3 Bg6 35.a3 Kf7 36.b4 Bd6 37.Be2 Qd7 38.Bf3 a6 39.Rc1
0.06: -0.74/21 27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rd1 Nxb2 31.Nxb2 Qd5 32.Bc4 Qf5 33.Bd3 Bxd3 34.Nxd3 h4 35.a4 Bd6 36.b4 Qe4 37.Rab1 Kf7 38.a5 bxa5 39.bxa5 hxg3 40.hxg3 Qd5
0.11: -0.60/22 27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rd1 Nxb2 31.Nxb2 h4 32.Re1 Qc6 33.Bf1 g5 34.Nc4 b5 35.Ne3 f5 36.Bg2 Bxg2 37.Nxg2 h3 38.Ne3 f4 39.Rac1 Qe4
0.15: -0.69/23 27...Nb4 28.Be2 Be4 29.Nd2 Nc2 30.Rab1 Bf5 31.Bf3 Qd8 32.Rd1 Nb4 33.a3 Bxb1 34.Nxb1 Nd5 35.Bxh5 Qc8 36.Rc1 Qa6 37.Rd1 f5 38.Bf3 Kf7 39.Bxd5 exd5 40.Nc3 Qb7
0.25: -0.69/24 27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rd1 Nxb2 31.Nxb2 Bc2 32.Rdc1 Qe4 33.Bc4 h4 34.b4 Bd6 35.Bxe6+ Qxe6 36.Rxc2 Qe4 37.Rc8+ Kh7 38.Rac1 hxg3 39.hxg3 Bxg3 40.fxg3 Qxd4+ 41.Kf1 Qxb2 42.R8c3 Qd2 43.R1c2 Qd1+ 44.Kf2 Kg6
0.31: -0.91/25 27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rd1 Nxb2 31.Nxb2 Bc2 32.Rdc1 Bxb3 33.Rc3 Bd5 34.Rac1 Be4 35.Nd3 g5 36.Bxh5 Qd5 37.Ne1 Qxd4 38.Rc8 Qb2 39.Rd1 Bd5 40.Bf3 Bxf3 41.Nxf3 Qe2 42.Rdd8 Qxf3 43.Rxf8+ Kg7 44.a4 Qe4 45.h3 Qxa4 46.Rfd8 Kg6 47.Rd6
0.35: -0.54/26 27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rd1 Nxb2 31.Nxb2 Bc2 32.Rdc1 Bxb3 33.Rc3 Bd5 34.Rac1 Be4 35.Nd3 g5 36.Bxh5 Qd5 37.Ne1 Qxd4 38.Rc8 Bd5 39.Bf3 Bxf3 40.Nxf3 Qd5 41.Ne1 Qe4 42.Ng2
0.44: -0.75/27 27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rd1 Nxb2 31.Nxb2 h4 32.b4 g6 33.Rac1 Bf3 34.Bxf3 Qxf3 35.Nd3 g5 36.Ra1 h3 37.Ne1 Qc3 38.Nd3 Kf7 39.Rac1 Qxa3 40.Ra1 Qb3 41.f4 Qd5 42.Rxa7+ Kg6
1.38: -0.76/28 27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rd1 Nxb2 31.Nxb2 h4 32.b4 g6 33.Nd3 Bd6 34.Bf1 Qd5 35.Ne1 Qb3 36.Bg2 Bf5 37.Nf3 Bg4 38.Rdb1 Qd3 39.Rd1 Qb5 40.d5 hxg3 41.hxg3 e5 42.Re1 Kf7 43.Nh2 Bc8 44.Re3 Qc4 45.Rae1
1.47: -0.90/29 27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rd1 Nxb2 31.Nxb2 h4 32.b4 g6 33.Nd3 g5 34.Ne1 a5 35.bxa5 bxa5 36.Bf1 Kf7 37.Bg2 Bd6 38.a4 Bb4 39.d5 exd5 40.Bxe4 dxe4 41.Nc2 Bc5 42.Ne3 Qa7 43.Re1 f5 44.gxh4
2.00: -0.75/30 27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rd1 Nxb2 31.Nxb2 h4 32.b4 g6 33.Nd3 Bd6 34.Bf1 Bf3 35.Rd2 a5 36.Ne1 Be4 37.bxa5 Qxa5 38.Rdd1 Qc3 39.Bg2 Bf5 40.gxh4 Bg4 41.Rac1 Qxa3 42.Nc2 Qa7 43.Re1 Qh7 44.Ne3 Qxh4 45.Nxg4
4.08: -0.50/31 27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rc3 Nxb2 31.Nxb2 Qd5 32.Na4 b5 33.Nc5 Bh1 34.Bf1 Qxd4 35.Rac1 Bd5 36.Bxb5 Bxc5 37.Rxc5 Qe4 38.Kf1 Qg2+ 39.Ke2 Qf3+ 40.Kf1 Qxb3 41.a4 Qf3 42.Bc6 Qh1+ 43.Ke2 Qe4+ 44.Kf1 Qg2+ 45.Ke2 h4 46.Bxd5 exd5 47.gxh4 Qe4+ 48.Kf1 d4 49.Rc8+ Kh7 50.Re1 Qxh4 51.Rc7 Qxh2 52.Rxa7
4.17: -0.63/32 27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rc3 Nxb2 31.Nxb2 Qd5 32.Na4 b5 33.Nc5 Bh1 34.Bf1 Qxd4 35.Rac1 Bd5 36.Bxb5 Bxc5 37.Rxc5 Qe4 38.Kf1 Qg2+ 39.Ke2 Qf3+ 40.Ke1 Qxb3 41.Be8 Qd3 42.R5c3 Qe4+ 43.Kf1 h4 44.f3 Qf5 45.Kg2 h3+ 46.Kf2 Kf8 47.Bc6
5.57: -0.82/33 27...Nb4
13.01: -1.30/33 27...h4
I was able to get h4 out of them but no way Nf4. I am afraid that being not as strong player, I am missing many moves like this and that might cost me some losses in the future.
I've never heard of the Stockfish_savehash by Daniel. How does the savehash work? Why would it be better for cases like this?

I only have my i5-4200H available so not as much computing power as all of you seem to have which might be bit of a problem..

Also if you have pretty much any advices concerning how to play correspondence chess, I am all ears! :D
Best regards,
Miloš
Top
peter
Posts: 3186
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Position analysis

Post by peter »

Seems to be a matter of nullmove too, here komodo with switched off appropriate option:

Code: Select all

q4bk1/pb4p1/1p2pp2/3n3p/2NP4/1P3BP1/PB3P1P/R1R3K1 b - - 0 1

Analysis by Komodo 11.2.2 64-bit:
...
27...Nb4 28.Be2 Be4 29.a3 Nd3 30.Rc3 Nxb2 31.Nxb2 Qd5 32.Rd1 Bxa3 33.Nc4 Qc6 34.Re3 Bb4 35.Bxh5 Bd5 36.Nb2 Bd6 37.Bg6 Bh1 38.Kf1 Bf3 39.Ra1 Bd5 40.Nd1 Qd7 41.Kg1 Bb4 42.Ra2 a5 43.Rc2 
  =/+  (-0.46)   Depth: 23   00:01:02  851MN
27...Nf4 28.Bxb7 Nh3+ 
  -/+  (-0.79 ++)   Depth: 23   00:01:10  959MN
...
27...Nf4 28.Bxb7 Nh3+ 
  -+  (-2.53 ++)   Depth: 23   00:01:22  1129MN
27...Nf4 28.Bxb7 Nh3+ 29.Kf1 Qxb7 30.Ke2 Qg2 31.Rf1 Qxh2 32.Rad1 h4 33.gxh4 Qf4 34.Ba3 Qe4+ 35.Kd2 Qxh4 36.Bxf8 Kxf8 37.Kc1 Nxf2 38.Rd2 Ne4 39.Rc2 Qg3 40.Nd2 Nxd2 41.Rxd2 Qc3+ 42.Kd1 Kf7 43.Rf4 b5 
  -+  (-3.00)   Depth: 23   00:02:03  1687MN
...
27...Nf4 28.Bxb7 Nh3+ 29.Kf1 Qxb7 30.Ke2 Qg2 31.Rf1 Qxh2 32.Rad1 h4 33.gxh4 Qf4 34.Ba3 b5 35.Bxf8 bxc4 36.Bc5 Qe4+ 37.Kd2 Nf4 38.Rfe1 Qd3+ 39.Kc1 Qc3+ 40.Kb1 cxb3 41.axb3 Qxb3+ 42.Ka1 Qc3+ 43.Ka2 Nd3 44.Rxd3 Qxe1 45.Ra3 Qxf2+ 46.Kb3 e5 47.Kb4 exd4 
  -+  (-3.21)   Depth: 24   00:02:22  1951MN
...
27...Nf4 28.Bxb7 Nh3+ 29.Kg2 Qxb7+ 30.d5 Ng5 31.Rf1 Qxd5+ 32.f3 Qf5 33.Kh1 Qh3 34.Rf2 Bc5 35.Rg2 Qf5 36.Nd2 Nh3 37.Ne4 Qxf3 38.Nxc5 bxc5 39.Rc1 Nf2+ 40.Kg1 Nd3 41.Rf1 Qe3+ 42.Kh1 Ne1 43.Rgf2 h4 44.Bxf6 Qe4+ 45.Kg1 gxf6 46.gxh4 
  -+  (-3.40)   Depth: 25   00:03:39  3065MN
Peter.
Top

Return to “Computer Chess Club: General Topics”