test position from playchess

jdart · Post by **jdart** » Wed Feb 05, 2014 5:09 am

[D] 2r3k1/1q3p2/1rp1pQ2/p2bN2p/P2P2p1/8/5P2/2R1R1K1 w - -

Jernjoffen (Komodo 6 64-bit)-JSchindler (Houdini 3 Pro x64), playchess.com 2013.

bm Nd3. Most engines like Qg5+ leading to a draw but will eventually see Nd3.

--Jon

zullil · Post by **zullil** » Wed Feb 05, 2014 11:30 am

jdart wrote:[D] 2r3k1/1q3p2/1rp1pQ2/p2bN2p/P2P2p1/8/5P2/2R1R1K1 w - -

Jernjoffen (Komodo 6 64-bit)-JSchindler (Houdini 3 Pro x64), playchess.com 2013.

bm Nd3. Most engines like Qg5+ leading to a draw but will eventually see Nd3.

--Jon

Latest Stockfish found it at depth 23:

info depth 23 seldepth 43 score cp 8 lowerbound nodes 33792839 nps 3355460 time 10071 multipv 1 pv e5d3 g4g3 e1e5 g3f2 g1f2 b6b2 f2e3 b2h2 c1f1 h2h3 e3e2 h3h2 f1f2 h2f2 e2f2 b7b3 e5h5 b3c2 f2e3

Now doubt that it wins:

Code: Select all

info depth 47 seldepth 92 score cp 1079 nodes 204403109282 nps 23719977 time 8617340 multipv 1 pv e5d3 b7c7 e1e5 c7d8 f6h6 f7f5 h6g6 g8h8 g6h5 h8g7 d3f4 d8g8 e5d5 e6d5 g1g2 g8h7 h5g5 g7f7 c1h1 h7h1 g2h1 c8b8 g5f5 f7e8 f4e6 b8b7 e6c5 b7e7 h1g2 b6b2

ernst · Post by **ernst** » Wed Feb 05, 2014 1:10 pm

StockfisfRW 041214:

Engine: StockfishRW 040214 64 SSE4.2 (8192 MB)
by Tord Romstad, Marco Costalba and Joona

20/39 0:01 +0.13 1.Qg5+ Kf8 2.Qxh5 g3 3.f3 f6 4.Qh8+ Ke7
5.Ng6+ Kf7 6.Qh7+ Ke8 7.Qg8+ Kd7
8.Nf8+ Ke7 9.Rxe6+ Bxe6 10.Re1 Rb1
11.Qxe6+ Kxf8 12.Qxf6+ Kg8 13.Qg6+ Qg7
14.Qe6+ (10.392.242) 8012 TB:6

21/39 0:03 0.00 1.Qg5+ Kf8 2.Qxh5 g3 3.f3 f6 4.Qh8+ Ke7
5.Ng6+ Kf7 6.Qh7+ Ke8 7.Qg8+ Kd7
8.Nf8+ Kd6 9.Re2 Rb1 10.Qxg3+ Ke7
11.Rxb1 Qxb1+ 12.Re1 Qb4 13.Qg7+ Ke8
14.Qd7+ (26.821.913) 8235 TB:39

22/42 0:04 0.00 1.Qg5+ Kf8 2.Qxh5 g3 3.f3 f6 4.Qh8+ Ke7
5.Ng6+ Kf7 6.Qh7+ Ke8 7.Qg8+ Kd7
8.Nf8+ Kd6 9.Re2 Rb1 10.Qxg3+ Ke7
11.Rxb1 Qxb1+ 12.Re1 Qb4 13.Qg7+ Ke8
14.Qd7+ (33.385.180) 8269 TB:70

23/42 0:05 +0.03++ 1.Nd3 g3 2.Re5 gxf2+ 3.Kxf2 Rb2+
4.Ke3 Rh2 5.Rg5+ Kf8 6.Rf1 Rh3+
7.Ke2 Rh2+ 8.Rf2 Rxf2+ 9.Kxf2 h4
10.Rh5 (47.388.378) 8429 TB:368

23/42 0:05 +0.06++ 1.Nd3 g3 2.Re5 gxf2+ 3.Kxf2 Rb2+
4.Ke3 Rh2 5.Rg5+ Kf8 6.Rf1 Rh3+
7.Ke2 Rh2+ 8.Rf2 Rxf2+ 9.Kxf2 h4
10.Rh5 (48.051.089) 8430 TB:368

23/42 0:05 +0.11++ 1.Nd3 g3 2.Re5 gxf2+ 3.Kxf2 Rb2+
4.Ke3 Rh2 5.Rg5+ Kf8 6.Rf1 Rh3+
7.Ke2 Rh2+ 8.Rf2 Rxf2+ 9.Kxf2 h4
10.Rh5 (48.453.082) 8433 TB:368

23/42 0:05 +0.19++ 1.Nd3 g3 2.Re5 gxf2+ 3.Kxf2 Rb2+
4.Ke3 Rh2 5.Rg5+ Kf8 6.Rf1 Rh3+
7.Ke2 Rh2+ 8.Rf2 Rxf2+ 9.Kxf2 h4
10.Rh5 (49.668.483) 8448 TB:368

23/42 0:06 +0.32++ 1.Nd3 g3 2.Re5 gxf2+ 3.Kxf2 Rb2+
4.Ke3 Rg2 5.Rxh5 Rg3+ 6.Kd2 Rg2+
7.Ke1 Kf8 8.Rh8+ Rg8 9.Rxg8+ Kxg8
10.Kd2 Qb8 11.Rg1+ Kf8 12.Qh8+ Ke7
13.Qh4+ Kf8 14.Rf1 (50.782.705) 8463 TB:368

23/48 0:07 +0.52++ 1.Nd3 Rb3 2.Re5 Rxd3 3.Rxh5 (60.800.183) 8452 TB:406

23/48 0:08 +0.64 1.Nd3 g3 2.f3 Qc7 3.Re5 Qd8 4.Rg5+ Kf8
5.Qg7+ Ke7 6.Ne5 Qe8 7.Qh7 Rb3
8.Rxg3 Re3 9.Qxh5 Rxe5 10.dxe5 Qh8
11.Qxh8 Rxh8 12.Rc5 Rh5 13.Rxa5 Rxe5
14.Ra7+ (67.688.840) 8422 TB:407

24/48 0:08 +0.68++ 1.Nd3 g3 2.f3 Qc7 3.Re5 Qd8 4.Rg5+ Kf8
5.Qh6+ Ke7 6.Rg7 Qh8 7.Qg6 Rf8 8.Ne5 (71.155.250) 8424 TB:407

24/48 0:08 +0.73++ 1.Nd3 g3 2.f3 Qc7 3.Re5 Qd8 4.Rg5+ Kf8
5.Qh6+ Ke7 6.Rg7 Qh8 7.Qg6 Rf8 8.Ne5 (73.162.125) 8412 TB:407

24/48 0:08 +0.80++ 1.Nd3 g3 2.f3 Qc7 3.Re5 Qd8 4.Rg5+ Kf8
5.Qh6+ Ke7 6.Rg7 Qh8 7.Qg6 Rf8 8.Ne5 (74.272.489) 8408 TB:407

24/48 0:09 +0.90++ 1.Nd3 g3 2.f3 Qc7 3.Re5 Qd8 4.Rg5+ Kf8
5.Qh6+ Ke7 6.Rg7 Qh8 7.Qg6 Rf8 8.Ne5 h4
9.Rxf7+ Kd8 10.Rd7+ Kc8 11.Rxd5 exd5
12.Rxc6+ Rxc6 13.Qxc6+ Kb8 14.Nd7+ (78.189.042) 8415 TB:407

24/48 0:09 +1.06++ 1.Nd3 g3 2.f3 Qc7 3.Re5 Qd8 4.Rg5+ Kf8
5.Qh6+ Ke7 6.Rg7 Qh8 7.Qg6 Rf8 8.Ne5 h4
9.Rxf7+ Kd8 10.Rd7+ Kc8 11.Rxd5 exd5
12.Rxc6+ Rxc6 13.Qxc6+ Kb8 14.Nd7+ (81.857.753) 8440 TB:407

24/48 0:10 +1.30++ 1.Nd3 Qc7 2.Re5 Qd8 3.Qh6 f5 4.Qg6+ Kh8
5.Qxh5+ Kg7 6.Nf4 Qg8 7.Qg6+ Kh8
8.Qf6+ Qg7 9.Nxd5 exd5 10.Qxf5 Rg8
11.Kg2 Rb3 12.Qh5+ Qh7 13.Rxc6 Rf8
14.Rh6 (86.885.984) 8433 TB:407

24/48 0:11 +1.62 1.Nd3 g3 2.f3 Bxf3 3.Qxf3 c5 4.Qxg3+ Kh7
5.Rxc5 Rxc5 6.dxc5 Rb1 7.Qe5 Rxe1+
8.Qxe1 Qd5 9.Qc3 Qf3 10.c6 Qg3+
11.Kf1 Qc7 12.Ke2 h4 13.Kf3 Kg8
14.Qc5 (95.253.504) 8456 TB:429

25/48 0:11 +1.57-- 1.Nd3 g3 2.f3 Bxf3 3.Qxf3 c5 4.Qxg3+ Kh7
5.Rxc5 Rxc5 6.dxc5 Rb1 7.Qe5 Kg8
8.Qg5+ Kf8 9.Qd8+ Kg7 10.Rxb1 Qxb1+
11.Kg2 Qc2+ (101.587.169) 8488 TB:470

25/48 0:12 +1.67++ 1.Nd3 g3 2.f3 Bxf3 3.Qxf3 c5 4.Qxg3+ Kh7
5.Rxc5 Rxc5 6.dxc5 Rb1 7.Qe5 Kg8
8.Qg5+ Kf8 9.Qd8+ Kg7 10.Qxa5 Qb3
11.Rxb1 Qxb1+ 12.Ne1 Qb3 13.Kf2 Qb2+
14.Ke3 (105.107.589) 8477 TB:473

25/48 0:14 +1.60 1.Nd3 Qc7 2.Re5 Qd8 3.Qh6 f5 4.Qg6+ Kh8
5.Qxh5+ Kg7 6.Nf4 Qg8 7.Qg6+ Kh8
8.Qf6+ Qg7 9.Nxd5 exd5 10.Qxf5 Rg8
11.Kg2 Rb3 12.Qh5+ Qh7 13.Rxc6 Rh3
14.Qxh7+ (120.450.131) 8508 TB:536

26/48 0:14 +1.55-- 1.Nd3 Qc7 2.Re5 Qd8 3.Qh6 f5 4.Qg6+ Kh8
5.Qxh5+ Kg7 6.Nf4 Qg8 7.Qg6+ Kh8
8.Qf6+ Qg7 9.Nxd5 exd5 10.Qxf5 Rg8
11.Kg2 Rb3 12.Qh5+ Qh7 13.Rxc6 Rh3
14.Qxh7+ (125.125.025) 8520 TB:544

26/48 0:15 +1.54 1.Nd3 Qc7 2.Re5 Qd8 3.Qh6 f5 4.Qg6+ Kh8
5.Qxh5+ Kg7 6.Nf4 Qg8 7.Qg6+ Kh8
8.Qf6+ Qg7 9.Nxd5 exd5 10.Qxf5 Rg8
11.Kg2 Rb3 12.Qh5+ Qh7 13.Rxc6 Rh3
14.Qxh7+ (134.000.806) 8551 TB:606

27/48 0:16 +1.59++ 1.Nd3 Qc7 2.Re5 Qd8 3.Qh6 f5 4.Qg6+ Kh8
5.Qxh5+ Kg7 6.Nf4 Qg8 7.Rxd5 exd5
8.Kg2 Qf7 9.Qg5+ Kf8 10.Ng6+ Kg8
11.Ne7+ (143.101.844) 8579 TB:622

27/48 0:17 +1.65++ 1.Nd3 Qc7 2.Re5 Qd8 3.Qh6 f5 4.Qg6+ Kh8
5.Qxh5+ Kg7 6.Nf4 Qg8 7.Rxd5 exd5
8.Kg2 Qf7 9.Qg5+ Kf8 10.Ng6+ Kg8
11.Ne7+ (150.654.687) 8578 TB:780

27/48 0:18 +1.73++ 1.Nd3 Qc7 2.Re5 Qd8 3.Qh6 f5 4.Qg6+ Kh8
5.Qxh5+ Kg7 6.Nf4 Qg8 7.Rxd5 exd5
8.Kg2 Qf7 9.Qg5+ Kf8 10.Ng6+ Kg8
11.Ne7+ (156.550.390) 8580 TB:813

27/48 0:19 +1.85++ 1.Nd3 Qc7 2.Re5 Qd8 3.Qh6 f5 4.Qg6+ Kh8
5.Qxh5+ Kg7 6.Nf4 Qg8 7.Rxd5 exd5
8.Kg2 Qf7 9.Qg5+ Kf8 10.Ng6+ Kg8
11.Ne7+ (167.415.870) 8563 TB:822

27/48 0:20 +2.03++ 1.Nd3 Qc7 2.Re5 Qd8 3.Qh6 f5 4.Qg6+ Kh8
5.Qxh5+ Kg7 6.Nf4 Qg8 7.Rxd5 exd5
8.Kg2 Qf7 9.Qg5+ Kf8 10.Ng6+ Kg8
11.Ne7+ (175.616.700) 8564 TB:841

27/48 0:22 +2.31++ 1.Nd3 Qc7 2.Re5 Qd8 3.Qh6 f6 4.Qg6+ Kf8
5.Rxh5 Ke7 6.Rh7+ Kd6 7.Qh6 (192.007.505) 8582
TB:1.105

27/51 0:25 +2.42 1.Nd3 g3 2.f3 Bxf3 3.Qxf3 c5 4.Qxh5 cxd4
5.Nc5 Qd5 6.Qg4+ Kh7 7.Qh4+ Kg6
8.Qxg3+ Kh7 9.Qh4+ Kg7 10.Qg4+ Kh6
11.Rc2 Rxc5 12.Rh2+ Qh5 13.Rxh5+ Rxh5
14.Qxd4 (221.779.675) 8637 TB:1.529

28/51 0:28 +2.48++ 1.Nd3 g3 2.f3 Bxf3 3.Qxf3 c5 4.Qxh5 cxd4
5.Nc5 Qd5 6.Qg4+ Kh7 7.Qh4+ Kg6
8.Qxg3+ Kh7 9.Qh4+ Kg7 10.Qg4+ Kh6
11.Rc2 Rxc5 12.Rh2+ Qh5 13.Rxh5+ Rxh5
14.Qxd4 (243.612.503) 8676 TB:2.700

28/51 0:30 +2.48 1.Nd3 g3 2.f3 Bxf3 3.Qxf3 c5 4.Qxh5 cxd4
5.Nc5 Qd5 6.Qg4+ Kh7 7.Qh4+ Kg6
8.Qxg3+ Kh7 9.Qh4+ Kg7 10.Qg4+ Kh6
11.Rc2 Rxc5 12.Rh2+ Qh5 13.Rxh5+ Rxh5
14.Qxd4 (263.405.776) 8683 TB:3.233

29/51 0:32 +2.48 1.Nd3 g3 2.f3 Bxf3 3.Qxf3 c5 4.Qxh5 cxd4
5.Nc5 Qd5 6.Qg4+ Kh7 7.Qh4+ Kg6
8.Qxg3+ Kh7 9.Qh4+ Kg7 10.Qg4+ Kh6
11.Rc2 Rxc5 12.Rh2+ Qh5 13.Rxh5+ Rxh5
14.Qxd4 (284.274.111) 8687 TB:4.000

best move: Ne5-d3 time: 0:33.562 min n/s: 8.687.818 nodes: 284.274.111 TB: 4.000

zullil · Post by **zullil** » Wed Feb 05, 2014 2:40 pm

ernst wrote:StockfishRW 040214:

What fish is this?

ernst · Post by **ernst** » Wed Feb 05, 2014 2:51 pm

zullil wrote:
ernst wrote:StockfishRW 040214:

What fish is this?

http://rybkaforum.net/cgi-bin/rybkaforu ... ?tid=27956

phenri · Post by **phenri** » Fri Feb 07, 2014 3:58 am

Hi Jon, thank you

Do you have PGN please?

jdart · Post by **jdart** » Fri Feb 07, 2014 4:13 am

phenri wrote:Hi Jon, thank you

Do you have PGN please?

Here you go:

[Event "60m+15s, rated"]
[Site "Engine Room"]
[Date "2013.11.20"]
[Round "?"]
[White "Jernjoffen, Komodo 6 64-bit"]
[Black "JSchindler, Houdini 3 Pro x64"]
[Result "1-0"]
[ECO "D15"]
[WhiteElo "2560"]
[BlackElo "2476"]
[Annotator " "]
[PlyCount "77"]
[EventDate "2013.12.29"]
[EventType "rapid"]
[TimeControl "3600+15"]

1. Nf3 {0.00/0 0} c6 {0.00/0 0} 2. c4 {0.00/0 0} d5 {0.00/0 0} 3. d4 {0.00/0 0}
Nf6 {0.00/0 0} 4. Nc3 {0.00/0 0} a6 {0.00/0 0} 5. c5 {0.00/0 0} Nbd7 {0.00/0 0}
6. Bf4 {0.00/0 0} Nh5 {0.00/0 0} 7. Bd2 {0.00/0 0} g6 {0.00/0 0} 8. e4 {0.00/0
0} dxe4 {0.00/0 0} 9. Nxe4 {0.00/0 0} Bg7 {0.00/0 0} 10. Bc4 {0.00/0 0} O-O {
0.00/0 0} 11. O-O {0.00/0 0} Ndf6 {0.00/0 0} 12. Nxf6+ {0.00/0 0} Nxf6 {0.00/0
0} 13. Qb3 {0.00/0 0} a5 {0.00/0 0} 14. a4 {0.00/0 0} Bf5 {0.36/26 152} 15.
Rad1 {0.43/24 210 (Qb3xb7)} Be4 {0.25/26 115 (Qc7)} 16. Ne5 {0.35/25 123
(Bd2-g5)} e6 {0.36/28 109} 17. Bg5 {0.36/25 65} Qc7 {0.33/28 60} 18. h3 {0.39/
25 146} Bd5 {0.34/27 0 (Nh5)} 19. Rfe1 {0.27/26 357 (Bg5-f4)} Rfb8 {0.23/26 87
(h6)} 20. Qe3 {0.24/23 247} b6 {0.15/25 0} 21. cxb6 {0.27/23 160 (Bg5-f4)} Rxb6
{0.16/25 109} 22. b3 {0.27/24 104} Rc8 {0.17/25 11 (Qb7)} 23. Rc1 {-300.02/23
505 (Bg5-h6)} Qb7 {0.16/26 203} 24. Bh6 {0.35/22 305 (h3-h4)} Bxc4 {0.27/26
136 (Qe7)} 25. Bxg7 {0.40/24 87 (b3xc4)} Nd5 {0.21/26 108 (Kxg7)} 26. Qg5 {
-300.02/22 28} Bxb3 {0.35/26 70} 27. Bf6 {-300.02/24 3} Nxf6 {0.36/26 68 (h6)}
28. Qxf6 {0.44/22 61} Bd5 {0.32/26 28} 29. h4 {0.87/25 106 (Ne5-g4)} h5 {0.25/
26 101 (Rb3)} 30. g4 {1.83/22 50} hxg4 {4.49/25 403} 31. h5 {2.60/27 3} gxh5 {
4.49/23 27} 32. Nd3 {2.68/26 67} g3 {4.01/25 13} 33. f3 {2.69/25 96} Bxf3 {4.
31/25 37} 34. Nc5 {-300.02/25 17} Rb2 {4.60/25 65} 35. Qxf3 {-300.02/25 37} Qe7
{4.64/26 53} 36. Qf4 {2.87/26 10 (Qf3xg3+)} Rd8 {6.86/23 182} 37. Re3 {3.26/28
91} Rd5 {7.13/25 0} 38. Rxg3+ {3.37/26 165} Kh7 {7.79/26 31} 39. Ne4 {3.29/25
10 JSchindler, Houdini 3 Pro x64 gibt auf (Lag: Av=0.38s, max=2.4s)} 1-0

zullil · Post by **zullil** » Fri Feb 07, 2014 6:36 am

jdart wrote:
phenri wrote:Hi Jon, thank you

Do you have PGN please?
Here you go:
[pgn]
[Event "60m+15s, rated"]
[Site "Engine Room"]
[Date "2013.11.20"]
[Round "?"]
[White "Jernjoffen, Komodo 6 64-bit"]
[Black "JSchindler, Houdini 3 Pro x64"]
[Result "1-0"]
[ECO "D15"]
[WhiteElo "2560"]
[BlackElo "2476"]
[Annotator " "]
[PlyCount "77"]
[EventDate "2013.12.29"]
[EventType "rapid"]
[TimeControl "3600+15"]

1. Nf3 {0.00/0 0} c6 {0.00/0 0} 2. c4 {0.00/0 0} d5 {0.00/0 0} 3. d4 {0.00/0 0}
Nf6 {0.00/0 0} 4. Nc3 {0.00/0 0} a6 {0.00/0 0} 5. c5 {0.00/0 0} Nbd7 {0.00/0 0}
6. Bf4 {0.00/0 0} Nh5 {0.00/0 0} 7. Bd2 {0.00/0 0} g6 {0.00/0 0} 8. e4 {0.00/0
0} dxe4 {0.00/0 0} 9. Nxe4 {0.00/0 0} Bg7 {0.00/0 0} 10. Bc4 {0.00/0 0} O-O {
0.00/0 0} 11. O-O {0.00/0 0} Ndf6 {0.00/0 0} 12. Nxf6+ {0.00/0 0} Nxf6 {0.00/0
0} 13. Qb3 {0.00/0 0} a5 {0.00/0 0} 14. a4 {0.00/0 0} Bf5 {0.36/26 152} 15.
Rad1 {0.43/24 210 (Qb3xb7)} Be4 {0.25/26 115 (Qc7)} 16. Ne5 {0.35/25 123
(Bd2-g5)} e6 {0.36/28 109} 17. Bg5 {0.36/25 65} Qc7 {0.33/28 60} 18. h3 {0.39/
25 146} Bd5 {0.34/27 0 (Nh5)} 19. Rfe1 {0.27/26 357 (Bg5-f4)} Rfb8 {0.23/26 87
(h6)} 20. Qe3 {0.24/23 247} b6 {0.15/25 0} 21. cxb6 {0.27/23 160 (Bg5-f4)} Rxb6
{0.16/25 109} 22. b3 {0.27/24 104} Rc8 {0.17/25 11 (Qb7)} 23. Rc1 {-300.02/23
505 (Bg5-h6)} Qb7 {0.16/26 203} 24. Bh6 {0.35/22 305 (h3-h4)} Bxc4 {0.27/26
136 (Qe7)} 25. Bxg7 {0.40/24 87 (b3xc4)} Nd5 {0.21/26 108 (Kxg7)} 26. Qg5 {
-300.02/22 28} Bxb3 {0.35/26 70} 27. Bf6 {-300.02/24 3} Nxf6 {0.36/26 68 (h6)}
28. Qxf6 {0.44/22 61} Bd5 {0.32/26 28} 29. h4 {0.87/25 106 (Ne5-g4)} h5 {0.25/
26 101 (Rb3)} 30. g4 {1.83/22 50} hxg4 {4.49/25 403} 31. h5 {2.60/27 3} gxh5 {
4.49/23 27} 32. Nd3 {2.68/26 67} g3 {4.01/25 13} 33. f3 {2.69/25 96} Bxf3 {4.
31/25 37} 34. Nc5 {-300.02/25 17} Rb2 {4.60/25 65} 35. Qxf3 {-300.02/25 37} Qe7
{4.64/26 53} 36. Qf4 {2.87/26 10 (Qf3xg3+)} Rd8 {6.86/23 182} 37. Re3 {3.26/28
91} Rd5 {7.13/25 0} 38. Rxg3+ {3.37/26 165} Kh7 {7.79/26 31} 39. Ne4 {3.29/25
10 JSchindler, Houdini 3 Pro x64 gibt auf (Lag: Av=0.38s, max=2.4s)} 1-0
[/pgn]

phenri · Post by **phenri** » Fri Feb 07, 2014 8:43 am

Thank you Jon, Nice game, interesting positions!
this is strange ... the most difficult for SF is to find 29.h4!! I guess because SF does not see at that time 32.Nd3!! and unfortunately SF prefers Ng4?!

[d]2r3k1/1q3p1p/1rp1pQp1/p2bN3/P2P4/7P/5PP1/2R1R1K1 w - - 0 1

Code: Select all

Analysis by Stockfish 050214 64 SSE4.2&#58;
(...)
29.Ng4 h5 30.Nh6+ Kf8 31.h4 Rb4 32.Rc5 Ke8 33.Rxa5 Rb1 34.Rxb1 Qxb1+ 35.Kh2 Qb8+ 36.g3 Qc7 37.Ng8 Rd8 38.Ra6 Rb8 39.Nh6 Bc4 40.Rxc6 Qxc6 41.Qh8+ Ke7 42.Qxb8 Qxa4 43.Qb7+ 
  +/=  &#40;0.46&#41;   Depth&#58; 19/33   00&#58;00&#58;00  2203kN
(...)
29.h4 h5 30.g4 hxg4 31.h5 gxh5 32.Qg5+ Kf8 33.Qxh5 Rb3 34.Re3 Rb1 35.Rec3 Be4 36.Nxg4 Bg6 37.Qh6+ Ke8 38.Nf6+ Ke7 39.Qh4 Kf8 40.Rxb1 Qxb1+ 41.Kg2 Qb7 42.Rc5 Kg7 43.Qg5 Rh8 44.Rxa5 Qb2 
  +/=  &#40;0.53 --)   Depth&#58; 24/47   00&#58;00&#58;08  41160kN
29.h4 h5 30.Rc3 Rb1 31.Rxb1 Qxb1+ 32.Kh2 Qf5 
  +/=  &#40;0.41 --)   Depth&#58; 24/47   00&#58;00&#58;09  47815kN
(...)
29.Ng4 h5 30.Nh6+ Kf8 31.Rc5 Rb1 32.Rxb1 Qxb1+ 33.Kh2 Qb7 34.Rxa5 Qc7+ 35.f4 Ke8 36.Ng8 Qd8 37.Ra7 Rc7 38.Rxc7 Qxc7 39.Qe5 Qxe5 40.fxe5 Kf8 41.Nf6 
  +/=  &#40;0.48 ++)   Depth&#58; 25/47   00&#58;00&#58;28  139MN
(...)
29.Ng4 h5 30.Nh6+ Kf8 31.Kh2 Ke8 32.Rc5 Qe7 33.Qh8+ Kd7 34.Qg7 Qf8 35.Qh7 Ke8 36.Rxa5 Rb7 37.f3 Rcb8 38.Rc5 Rb2 39.Rc3 R8b7 40.a5 Ra7 
  =  &#40;0.27 --)   Depth&#58; 35/54   00&#58;04&#58;08  1268MN

but after 29.h4 he sees and reply with 29...Rb3 but it's a little late (If I remember correctly, this position is a retro analysis. ie I did rewind since 32.Nd3 (hash 512))
[d]2r3k1/1q3p1p/1rp1pQp1/p2bN3/P2P3P/8/5PP1/2R1R1K1 b - - 0 1

Code: Select all

Analysis by Stockfish 050214 64 SSE4.2&#58;
29...Rf8 30.h5 gxh5 31.Re3 Rb3 32.Rf1 Qa6 
  +/-  &#40;0.81&#41;   Depth&#58; 7/9   00&#58;00&#58;00  12kN
29...Rf8 30.h5 gxh5 31.Re3 Rb3 32.Rf1 Rb8 33.Kh2 Rxe3 34.fxe3 
  +/=  &#40;0.33&#41;   Depth&#58; 8/9   00&#58;00&#58;00  17kN
29...Rf8 30.h5 gxh5 31.Re3 Rb3 32.Rf1 Rb8 33.Nd3 Be4 34.Ne5 Rxe3 35.fxe3 
  +/=  &#40;0.31&#41;   Depth&#58; 9/13   00&#58;00&#58;00  27kN
29...Rf8 30.h5 gxh5 31.Re3 Rb3 32.Rxb3 Qxb3 33.Nd7 Ra8 34.Qg5+ Kh8 35.Qe5+ Kg8 36.Nf6+ Kf8 37.Nxh5 Qxa4 
  +/-  &#40;1.05&#41;   Depth&#58; 10/15   00&#58;00&#58;00  71kN
29...Rb3 30.Ng4 h5 31.Nh6+ Kf8 32.f3 Rb4 33.Qh8+ Ke7 34.Qg7 Rf8 35.Ng8+ Rxg8 36.Qxg8 Rxd4 
  +/-  &#40;1.27&#41;   Depth&#58; 11/20   00&#58;00&#58;00  123kN
(...)
29...Rb3 30.h5 gxh5 31.Rc5 Re8 32.Qg5+ Kf8 33.Qh6+ Kg8 34.Qxh5 Qe7 35.Nxc6 Bxc6 36.Qh6 Bd5 37.Rxd5 exd5 38.Rxe7 Rxe7 39.Qg5+ Kf8 40.Qxd5 Rb1+ 41.Kh2 Re6 42.g4 Rb4 43.Qc5+ Kg7 44.d5 Ree4 45.d6 Rbd4 46.f3 Re2+ 47.Kg3 Red2 48.Qg5+ Kf8 
  +/-  &#40;1.10&#41;   Depth&#58; 32/60   00&#58;00&#58;52  280MN
29...h5 30.g4 hxg4 31.Nxg4 Rb3 32.Nh6+ Kf8 33.Qh8+ Ke7 34.Ng8+ Rxg8 35.Qxg8 Qc7 
  +/-  &#40;1.02 ++)   Depth&#58; 33/60   00&#58;01&#58;04  341MN
29...h5 30.g4 hxg4 31.Nxg4 Rb3 32.Nh6+ Kf8 33.Qh8+ Ke7 34.Ng8+ Rxg8 35.Qxg8 Qc7 
  +/-  &#40;0.93 ++)   Depth&#58; 33/60   00&#58;01&#58;06  352MN
29...h5 30.g4 hxg4 31.Nxg4 Rb3 32.Nh6+ Kf8 33.Qh8+ Ke7 
  +/-  &#40;0.81 ++)   Depth&#58; 33/60   00&#58;01&#58;08  366MN
29...h5 30.g4 hxg4 31.h5 gxh5 32.Nd3 g3 33.f3 Rb2 34.Re5 Kf8 35.Rxh5 Rh2 36.Rxh2 gxh2+ 37.Kxh2 Bb3 38.Rg1 
  +/-  &#40;1.18 --)   Depth&#58; 33/60   00&#58;01&#58;34  503MN
(...)
29...Rb3 30.h5 gxh5 31.Rc5 Re8 32.Qg5+ Kf8 33.Qh6+ Kg8 34.Nxc6 Rb1 35.Rxb1 Qxb1+ 36.Kh2 Bxc6 37.Rg5+ Qg6 38.Qxh5 Bxa4 39.d5 Bd7 40.dxe6 Bxe6 41.Rxg6+ hxg6 42.Qxa5 f6 43.f3 g5 44.Qc7 Bd5 45.Kg3 Bf7 46.Kf2 Kg7 47.g4 Re5 48.Qc3 Rb5 49.Kg3 Re5 50.Qc6 Bb3 51.Qc7+ Kg6 52.Qc3 Bd5 53.Qd3+ Kg7 54.Kf2 Bf7 
  +/-  &#40;1.34&#41;   Depth&#58; 36/70   00&#58;04&#58;57  1630MN
29...Rb3 30.h5 gxh5 31.Rc5 Re8 32.Qg5+ Kf8 33.Qh6+ Kg8 34.Nxc6 Rb1 35.Rxb1 Qxb1+ 36.Kh2 Bxc6 37.Rg5+ Qg6 38.Qxh5 Bxa4 39.d5 Bd7 40.dxe6 Bxe6 41.Rxg6+ hxg6 42.Qxa5 f6 43.f3 g5 44.Qc7 Bd5 45.Kg3 Bf7 46.Kf2 Kg7 47.g4 Re5 48.Qc3 Rb5 49.Kg3 Re5 50.Qc6 Bb3 51.Qc7+ Kg6 52.Qc3 Bd5 53.Qd3+ Kg7 54.Kf2 Bf7 
  +/-  &#40;1.34&#41;   Depth&#58; 37/70   00&#58;06&#58;22  2082MN

29...Rb3 seems to be the answer that could lead to such a position that seems to be draw
[d]4r1k1/8/4bpp1/Q7/8/8/5PPK/8 w - - 0 43

zullil · Post by **zullil** » Fri Feb 07, 2014 1:47 pm

phenri wrote: ... the most difficult for SF is to find 29.h4!! I guess because SF does not see at that time 32.Nd3!! and unfortunately SF prefers Ng4?!

[d]2r3k1/1q3p1p/1rp1pQp1/p2bN3/P2P4/7P/5PP1/2R1R1K1 w - - 0 1

Here Stockfish switches to h4 at depth 32:

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info depth 32 seldepth 56 score cp 62 lowerbound nodes 662346998 nps 12875106 time 51444 multipv 1 pv h3h4 h7h5 g2g4 b6b3 g4h5 b3h3 f2f3

It quickly sees that Rb3 is the best reply, but still favors h4 at depth 48:

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info depth 48 seldepth 94 score cp 182 nodes 83492864841 nps 20345960 time 4103658 multipv 1 pv h3h4 b6b3 h4h5 g6h5 c1c5 c8e8 f6g5 g8f8 g5h6 f8g8 e5c6 b3b1 e1b1 b7b1 c5c1 b1b7 c6e5 d5e4 h6h5 e4g6 h5g5 e8a8 e5c6 b7d7 c6e7 g8g7 d4d5 a8e8 e7g6 h7g6 g5e5 f7f6 d5e6 e8e6 e5a5 e6e5 a5b4 e5f5 c1e1 d7d8 e1e7 g7h6 b4h4 f5h5 h4f4 h5g5 e7e1 h6g7 e1b1 d8d5 f4c7 g7h6 c7h2 h6g7 b1c1 g5h5 c1c7 g7f8 c7c8 f8g7 h2c7 g7h6 c8h8 h6g5 c7c1 g5f5 h8e8

I haven't looked at the PV.

test position from playchess

test position from playchess

Re: test position from playchess

Re: test position from playchess

Re: test position from playchess

Re: test position from playchess

Re: test position from playchess

Re: test position from playchess

Re: test position from playchess

Re: test position from playchess

Re: test position from playchess