I posted this position a little over a year and a half ago, and while it did look like Louis was able to solve it with the latest (at the time) development version of Stockfish (at a depth of 55/82), he said it did take a while and was difficult. I was wondering if any programs/hardware now can improve on that.
here is the position before Rxd5!!
[d]r2r1q1k/5p1p/4pP2/pppbB2Q/1b6/1P4P1/5PBP/R2R2K1 w - - 0 24
If you were wondering where this position came from here is the game:
[Event "EU-chT9 sf01 email"]
[Site "ICCF email"]
[Date "2011.07.15"]
[Round "?"]
[White "Loinjak, Sinisa"]
[Black "Norrelykke, Svend GJ"]
[Result "1-0"]
[ECO "E04"]
[WhiteElo "2483"]
[BlackElo "2346"]
[PlyCount "67"]
[EventDate "2011.??.??"]
[EventType "corr"]
[EventRounds "12"]
[Source "ChessBase"]
[SourceDate "2012.11.12"]
[WhiteTeam "Croatia"]
[BlackTeam "Denmark"]
[WhiteTeamCountry "CRO"]
[BlackTeamCountry "DEN"]
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 a6 6. O-O Nc6 7. e3 Bd7 8. Qe2
b5 9. b3 cxb3 10. axb3 Bd6 11. Bb2 O-O 12. Rc1 Nd5 13. Nc3 Qe7 14. Ne4 Rfd8 15.
Ne5 Nxe5 16. dxe5 Bb4 17. Nf6+ gxf6 18. exf6 Qf8 19. Qh5 c5 20. Be5 Bc6 21. e4
Kh8 22. exd5 Bxd5 23. Rd1 a5 24. Rxd5 exd5 25. Rd1 d4 26. Be4 Qg8 27. g4 Re8
28. Rd3 Rxe5 29. Qxe5 Re8 30. Qf4 Rxe4 31. Qxe4 a4 32. bxa4 bxa4 33. Qd5 a3 34.
g5 1-0
Test Position: Rxd5!! still to tough for my engines/hardware
Moderators: hgm, Rebel, chrisw
-
acase
- Posts: 983
- Joined: Wed Mar 15, 2006 1:14 am
- Location: Columbus, Ohio USA
- Full name: Andrew R Case
-
styx
- Posts: 338
- Joined: Tue Mar 13, 2012 9:59 pm
- Location: Germany
Re: Test Position: Rxd5!! still to tough for my engines/hard
[pgn][Event "EU-chT9 sf01 email"]
[Site "ICCF email"]
[Date "2011.07.15"]
[Round "?"]
[White "Loinjak, Sinisa"]
[Black "Norrelykke, Svend GJ"]
[Result "1-0"]
[ECO "E04"]
[WhiteElo "2483"]
[BlackElo "2346"]
[PlyCount "67"]
[EventDate "2011.??.??"]
[EventType "corr"]
[EventRounds "12"]
[Source "ChessBase"]
[SourceDate "2012.11.12"]
[WhiteTeam "Croatia"]
[BlackTeam "Denmark"]
[WhiteTeamCountry "CRO"]
[BlackTeamCountry "DEN"]
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 a6 6. O-O Nc6 7. e3 Bd7 8. Qe2
b5 9. b3 cxb3 10. axb3 Bd6 11. Bb2 O-O 12. Rc1 Nd5 13. Nc3 Qe7 14. Ne4 Rfd8 15.
Ne5 Nxe5 16. dxe5 Bb4 17. Nf6+ gxf6 18. exf6 Qf8 19. Qh5 c5 20. Be5 Bc6 21. e4
Kh8 22. exd5 Bxd5 23. Rd1 a5 24. Rxd5 exd5 25. Rd1 d4 26. Be4 Qg8 27. g4 Re8
28. Rd3 Rxe5 29. Qxe5 Re8 30. Qf4 Rxe4 31. Qxe4 a4 32. bxa4 bxa4 33. Qd5 a3 34.
g5 1-0[/pgn]
[Site "ICCF email"]
[Date "2011.07.15"]
[Round "?"]
[White "Loinjak, Sinisa"]
[Black "Norrelykke, Svend GJ"]
[Result "1-0"]
[ECO "E04"]
[WhiteElo "2483"]
[BlackElo "2346"]
[PlyCount "67"]
[EventDate "2011.??.??"]
[EventType "corr"]
[EventRounds "12"]
[Source "ChessBase"]
[SourceDate "2012.11.12"]
[WhiteTeam "Croatia"]
[BlackTeam "Denmark"]
[WhiteTeamCountry "CRO"]
[BlackTeamCountry "DEN"]
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 a6 6. O-O Nc6 7. e3 Bd7 8. Qe2
b5 9. b3 cxb3 10. axb3 Bd6 11. Bb2 O-O 12. Rc1 Nd5 13. Nc3 Qe7 14. Ne4 Rfd8 15.
Ne5 Nxe5 16. dxe5 Bb4 17. Nf6+ gxf6 18. exf6 Qf8 19. Qh5 c5 20. Be5 Bc6 21. e4
Kh8 22. exd5 Bxd5 23. Rd1 a5 24. Rxd5 exd5 25. Rd1 d4 26. Be4 Qg8 27. g4 Re8
28. Rd3 Rxe5 29. Qxe5 Re8 30. Qf4 Rxe4 31. Qxe4 a4 32. bxa4 bxa4 33. Qd5 a3 34.
g5 1-0[/pgn]
-
Jouni
- Posts: 3293
- Joined: Wed Mar 08, 2006 8:15 pm
Re: Test Position: Rxd5!! still to tough for my engines/hard
Analysis by Houdini 3 x64 Tac:
24.Rxd5 exd5 25.Rd1 Qe8 26.Bxd5 a4 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.Be5 Bg7 32.Bxg7+ Qxg7 33.Qc6 Qf8 34.bxa4 bxa4 35.Rd7 Kg7 36.Rd4 Qc8 37.Qd5 a3 38.Rc4 Qd8 39.Qe5+ f6 40.Rc7+ Kh8 41.Qe4 Qxc7 42.Qxa8+ Kg7 43.Qxa3 Qb7 44.Qd3 Qc6 45.Qe3 h6 46.h3 Qb7 47.Qd3 Qc6
+/- (0.74) Depth: 22/65 00:02:22 1322mN
24.Rxd5 exd5 25.Rd1 Qe8 26.Bxd5 a4 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.Be5 Bg7 32.Bxg7+ Qxg7 33.Qc6 Qf8 34.bxa4 bxa4 35.Rd7 Kg7 36.Rd4 Qc8 37.Qd5 a3 38.Rc4 Qd8 39.Qe5+ f6 40.Rc7+ Kh8 41.Qe4 Qxc7 42.Qxa8+ Kg7 43.Qxa3 Qb7 44.Qd3 Qc6 45.Qe3 h6 46.h3 Qb7 47.Qd3 Qc6
+/- (0.74) Depth: 22/65 00:02:22 1322mN
Jouni
-
Robert Flesher
- Posts: 1280
- Joined: Tue Aug 18, 2009 3:06 am
Re: Test Position: Rxd5!! still to tough for my engines/hard
acase wrote:I posted this position a little over a year and a half ago, and while it did look like Louis was able to solve it with the latest (at the time) development version of Stockfish (at a depth of 55/82), he said it did take a while and was difficult. I was wondering if any programs/hardware now can improve on that.
here is the position before Rxd5!!
[d]r2r1q1k/5p1p/4pP2/pppbB2Q/1b6/1P4P1/5PBP/R2R2K1 w - - 0 24
If you were wondering
where this position came from here is the game:
[Event "EU-chT9 sf01 email"]
[Site "ICCF email"]
[Date "2011.07.15"]
[Round "?"]
[White "Loinjak, Sinisa"]
[Black "Norrelykke, Svend GJ"]
[Result "1-0"]
[ECO "E04"]
[WhiteElo "2483"]
[BlackElo "2346"]
[PlyCount "67"]
[EventDate "2011.??.??"]
[EventType "corr"]
[EventRounds "12"]
[Source "ChessBase"]
[SourceDate "2012.11.12"]
[WhiteTeam "Croatia"]
[BlackTeam "Denmark"]
[WhiteTeamCountry "CRO"]
[BlackTeamCountry "DEN"]
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 a6 6. O-O Nc6 7. e3 Bd7 8. Qe2
b5 9. b3 cxb3 10. axb3 Bd6 11. Bb2 O-O 12. Rc1 Nd5 13. Nc3 Qe7 14. Ne4 Rfd8 15.
Ne5 Nxe5 16. dxe5 Bb4 17. Nf6+ gxf6 18. exf6 Qf8 19. Qh5 c5 20. Be5 Bc6 21. e4
Kh8 22. exd5 Bxd5 23. Rd1 a5 24. Rxd5 exd5 25. Rd1 d4 26. Be4 Qg8 27. g4 Re8
28. Rd3 Rxe5 29. Qxe5 Re8 30. Qf4 Rxe4 31. Qxe4 a4 32. bxa4 bxa4 33. Qd5 a3 34.
g5 1-0
Lovely position! I am curious as to whether the position after Rxd5!! is winning? Are there other ideas that may allow black to draw?
I looked at d4 and it seems that move may be losing although it seems to be the most logical move. How about :
[pgn] [Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r2r1q1k/5p1p/4pP2/pppbB2Q/1b6/1P4P1/5PBP/R2R2K1 w - - 0 24"]
[PlyCount "4"]
24. Rxd5 exd5 25. Rd1 a4 !?[/pgn]
....then [pgn] [Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r2r1q1k/5p1p/4pP2/pppbB2Q/1b6/1P4P1/5PBP/R2R2K1 w - - 0 24"]
[PlyCount "10"]
24. Rxd5 exd5 25. Rd1 a4 26. bxa4 bxa4 27. Bxd5 Qe8 28. Bxa8 Rxa8 !? [/pgn]
Is white winning here? White should be winning, but blacks pawns look dangerous.
-
acase
- Posts: 983
- Joined: Wed Mar 15, 2006 1:14 am
- Location: Columbus, Ohio USA
- Full name: Andrew R Case
Re: Test Position: Rxd5!! still to tough for my engines/hard
Jouni wrote:Analysis by Houdini 3 x64 Tac:
24.Rxd5 exd5 25.Rd1 Qe8 26.Bxd5 a4 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.Be5 Bg7 32.Bxg7+ Qxg7 33.Qc6 Qf8 34.bxa4 bxa4 35.Rd7 Kg7 36.Rd4 Qc8 37.Qd5 a3 38.Rc4 Qd8 39.Qe5+ f6 40.Rc7+ Kh8 41.Qe4 Qxc7 42.Qxa8+ Kg7 43.Qxa3 Qb7 44.Qd3 Qc6 45.Qe3 h6 46.h3 Qb7 47.Qd3 Qc6
+/- (0.74) Depth: 22/65 00:02:22 1322mN
Thanks Jouni, I knew there had to be at least 1 engine out there that would get this position in a reasonable amount of time, it was just a matter of choosing the right one. I never thought to try H3 tactical, I tried mostly newer engines.
-
acase
- Posts: 983
- Joined: Wed Mar 15, 2006 1:14 am
- Location: Columbus, Ohio USA
- Full name: Andrew R Case
Re: Test Position: Rxd5!! still to tough for my engines/hard
Robert Flesher wrote:acase wrote:I posted this position a little over a year and a half ago, and while it did look like Louis was able to solve it with the latest (at the time) development version of Stockfish (at a depth of 55/82), he said it did take a while and was difficult. I was wondering if any programs/hardware now can improve on that.
here is the position before Rxd5!!
[d]r2r1q1k/5p1p/4pP2/pppbB2Q/1b6/1P4P1/5PBP/R2R2K1 w - - 0 24
If you were wondering
where this position came from here is the game:
[Event "EU-chT9 sf01 email"]
[Site "ICCF email"]
[Date "2011.07.15"]
[Round "?"]
[White "Loinjak, Sinisa"]
[Black "Norrelykke, Svend GJ"]
[Result "1-0"]
[ECO "E04"]
[WhiteElo "2483"]
[BlackElo "2346"]
[PlyCount "67"]
[EventDate "2011.??.??"]
[EventType "corr"]
[EventRounds "12"]
[Source "ChessBase"]
[SourceDate "2012.11.12"]
[WhiteTeam "Croatia"]
[BlackTeam "Denmark"]
[WhiteTeamCountry "CRO"]
[BlackTeamCountry "DEN"]
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 a6 6. O-O Nc6 7. e3 Bd7 8. Qe2
b5 9. b3 cxb3 10. axb3 Bd6 11. Bb2 O-O 12. Rc1 Nd5 13. Nc3 Qe7 14. Ne4 Rfd8 15.
Ne5 Nxe5 16. dxe5 Bb4 17. Nf6+ gxf6 18. exf6 Qf8 19. Qh5 c5 20. Be5 Bc6 21. e4
Kh8 22. exd5 Bxd5 23. Rd1 a5 24. Rxd5 exd5 25. Rd1 d4 26. Be4 Qg8 27. g4 Re8
28. Rd3 Rxe5 29. Qxe5 Re8 30. Qf4 Rxe4 31. Qxe4 a4 32. bxa4 bxa4 33. Qd5 a3 34.
g5 1-0
Lovely position! I am curious as to whether the position after Rxd5!! is winning? Are there other ideas that may allow black to draw?
I looked at d4 and it seems that move may be losing although it seems to be the most logical move. How about :
[pgn] [Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r2r1q1k/5p1p/4pP2/pppbB2Q/1b6/1P4P1/5PBP/R2R2K1 w - - 0 24"]
[PlyCount "4"]
24. Rxd5 exd5 25. Rd1 a4 !?[/pgn]
....then [pgn] [Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r2r1q1k/5p1p/4pP2/pppbB2Q/1b6/1P4P1/5PBP/R2R2K1 w - - 0 24"]
[PlyCount "10"]
24. Rxd5 exd5 25. Rd1 a4 26. bxa4 bxa4 27. Bxd5 Qe8 28. Bxa8 Rxa8 !? [/pgn]
Is white winning here? White should be winning, but blacks pawns look dangerous.
Hello Robert, what if white instead of playing 26.bxa4 played 26.Bxd5 in your line?
-
kgburcham
- Posts: 2016
- Joined: Sun Feb 17, 2008 4:19 pm
Re: Test Position: Rxd5!! still to tough for my engines/hard
[D] r2r1q1k/5p1p/4pP2/pppbB2Q/1b6/1P4P1/5PBP/R2R2K1 w - -
Engine: Stockfish 7Beta1 64 BMI2 (8192 MB)
by T. Romstad, M. Costalba, J. Kiiski, G.
45/67 40:47 +0.57++ 24.Rxd5 (46.570.105.283) 19030
45/67 42:57 +0.64++ 24.Rxd5 (49.055.133.803) 19029
45/67 47:27 +0.74++ 24.Rxd5 (54.212.865.603) 19037
45/67 51:59 +0.89++ 24.Rxd5 (59.396.423.338) 19037
45/82 60:54 +0.85 24.Rxd5 exd5 25.Rd1 Qe8 26.Rxd5 Qg8 27.Bc7 Rxd5 28.Bxd5 Ra7 29.Bb6 Rd7 30.Qf5 Rd6 31.Bc7 Rxd5 32.Qxd5 Qe8 33.Bd6 h6 34.h4 c4 35.bxc4 Bxd6 36.Qxd6 bxc4 37.Qf4 (69.764.293.803) 19090
46/82 67:52 +0.92++ 24.Rxd5 (78.559.891.823) 19289
[Event "EU-chT9 sf01 email"]
[Site "ICCF email"]
[Date "2011.07.15"]
[Round "?"]
[White "Loinjak, Sinisa"]
[Black "Norrelykke, Svend GJ"]
[WhiteElo "2483"]
[BlackElo "2346"]
[ECO "E04"]
[Result "1-0"]
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 a6 6. O-O
Nc6 7. e3 Bd7 8. Qe2 b5 9. b3 cxb3 10. axb3 Bd6 11. Bb2 O-O
12. Rc1 Nd5 13. Nc3 Qe7 14. Ne4 Rfd8 15. Ne5 Nxe5 16. dxe5
Bb4 17. Nf6+ gxf6 18. exf6 Qf8 19. Qh5 c5 20. Be5 Bc6
21. e4 Kh8 22. exd5 Bxd5 23. Rd1 a5 24. Rxd5 exd5 25. Rd1
d4 26. Be4 Qg8 27. g4 Re8 28. Rd3 Rxe5 29. Qxe5 Re8 30. Qf4
Rxe4 31. Qxe4 a4 32. bxa4 bxa4 33. Qd5 a3 34. g5 1-0
Engine: Stockfish 7Beta1 64 BMI2 (8192 MB)
by T. Romstad, M. Costalba, J. Kiiski, G.
45/67 40:47 +0.57++ 24.Rxd5 (46.570.105.283) 19030
45/67 42:57 +0.64++ 24.Rxd5 (49.055.133.803) 19029
45/67 47:27 +0.74++ 24.Rxd5 (54.212.865.603) 19037
45/67 51:59 +0.89++ 24.Rxd5 (59.396.423.338) 19037
45/82 60:54 +0.85 24.Rxd5 exd5 25.Rd1 Qe8 26.Rxd5 Qg8 27.Bc7 Rxd5 28.Bxd5 Ra7 29.Bb6 Rd7 30.Qf5 Rd6 31.Bc7 Rxd5 32.Qxd5 Qe8 33.Bd6 h6 34.h4 c4 35.bxc4 Bxd6 36.Qxd6 bxc4 37.Qf4 (69.764.293.803) 19090
46/82 67:52 +0.92++ 24.Rxd5 (78.559.891.823) 19289
[Event "EU-chT9 sf01 email"]
[Site "ICCF email"]
[Date "2011.07.15"]
[Round "?"]
[White "Loinjak, Sinisa"]
[Black "Norrelykke, Svend GJ"]
[WhiteElo "2483"]
[BlackElo "2346"]
[ECO "E04"]
[Result "1-0"]
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 a6 6. O-O
Nc6 7. e3 Bd7 8. Qe2 b5 9. b3 cxb3 10. axb3 Bd6 11. Bb2 O-O
12. Rc1 Nd5 13. Nc3 Qe7 14. Ne4 Rfd8 15. Ne5 Nxe5 16. dxe5
Bb4 17. Nf6+ gxf6 18. exf6 Qf8 19. Qh5 c5 20. Be5 Bc6
21. e4 Kh8 22. exd5 Bxd5 23. Rd1 a5 24. Rxd5 exd5 25. Rd1
d4 26. Be4 Qg8 27. g4 Re8 28. Rd3 Rxe5 29. Qxe5 Re8 30. Qf4
Rxe4 31. Qxe4 a4 32. bxa4 bxa4 33. Qd5 a3 34. g5 1-0
no chess program was born totally from one mind. all chess programs have many ideas from many minds.
-
kgburcham
- Posts: 2016
- Joined: Sun Feb 17, 2008 4:19 pm
Re: Test Position: Rxd5!! still to tough for my engines/hard
[D] r2r1q1k/5p1p/4pP2/pppbB2Q/1b6/1P4P1/5PBP/R2R2K1 w - -
8 processor(s) found, POPCNT available
NUMA configuration with 1 node(s), offset 0
Nalimov 6 men EGTB available - 999 MB cache
Engine: Houdini 4 Pro x64 (8192 MB)
by Robert Houdart
23/78 1:10 +0.54++ 24.Rxd5 (1.623.881.956) 23110 TB:125
23/78 1:14 +0.72++ 24.Rxd5 (1.708.245.210) 23036 TB:345
other best move - reduce depth to 20
20/78 1:15 +0.76 24.Rxd5 exd5 25.Rd1 a4 26.bxa4 bxa4 27.Bxd5 Qe8 28.Bxa8 Rxa8 29.Bf4 Bc3 30.Qg5 Qg8 31.Qxc5 Bxf6 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (1.736.639.279) 22980 TB:463
21/78 1:16 +0.76 24.Rxd5 exd5 25.Rd1 a4 26.bxa4 bxa4 27.Bxd5 Qe8 28.Bxa8 Rxa8 29.Bf4 Bc3 30.Qg5 Qg8 31.Qxc5 Bxf6 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (1.747.645.416) 22973 TB:469
22/78 1:18 +0.66-- 24.Rxd5 exd5 (1.792.938.824) 22954 TB:490
22/78 1:23 +0.80 24.Rxd5 exd5 25.Rd1 Qe8 26.Bxd5 a4 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.bxa4 bxa4 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (1.916.363.817) 22933 TB:499
23/78 1:26 +0.80 24.Rxd5 exd5 25.Rd1 Qe8 26.Bxd5 a4 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.bxa4 bxa4 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (1.984.617.292) 22957 TB:499
24/78 1:31 +0.80 24.Rxd5 exd5 25.Rd1 Qe8 26.Bxd5 a4 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.bxa4 bxa4 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (2.113.661.821) 22994 TB:499
25/78 1:53 +0.80 24.Rxd5 exd5 25.Rd1 Qe8 26.Bxd5 a4 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.bxa4 bxa4 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (2.634.433.780) 23161 TB:630
26/78 2:45 +0.84 24.Rxd5 exd5 25.Rd1 Qe8 26.Bxd5 a4 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.bxa4 bxa4 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (3.890.735.695) 23448 TB:1.921
27/78 3:59 +0.84 24.Rxd5 exd5 25.Rd1 Qe8 26.Bxd5 a4 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.bxa4 bxa4 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (5.663.936.737) 23629 TB:2.508
28/87 8:19 +0.81 24.Rxd5 exd5 25.Rd1 a4 26.Bxd5 Qe8 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.bxa4 bxa4 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (11.993.356.513) 23990 TB:25.633
8 processor(s) found, POPCNT available
NUMA configuration with 1 node(s), offset 0
Nalimov 6 men EGTB available - 999 MB cache
Engine: Houdini 4 Pro x64 (8192 MB)
by Robert Houdart
23/78 1:10 +0.54++ 24.Rxd5 (1.623.881.956) 23110 TB:125
23/78 1:14 +0.72++ 24.Rxd5 (1.708.245.210) 23036 TB:345
other best move - reduce depth to 20
20/78 1:15 +0.76 24.Rxd5 exd5 25.Rd1 a4 26.bxa4 bxa4 27.Bxd5 Qe8 28.Bxa8 Rxa8 29.Bf4 Bc3 30.Qg5 Qg8 31.Qxc5 Bxf6 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (1.736.639.279) 22980 TB:463
21/78 1:16 +0.76 24.Rxd5 exd5 25.Rd1 a4 26.bxa4 bxa4 27.Bxd5 Qe8 28.Bxa8 Rxa8 29.Bf4 Bc3 30.Qg5 Qg8 31.Qxc5 Bxf6 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (1.747.645.416) 22973 TB:469
22/78 1:18 +0.66-- 24.Rxd5 exd5 (1.792.938.824) 22954 TB:490
22/78 1:23 +0.80 24.Rxd5 exd5 25.Rd1 Qe8 26.Bxd5 a4 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.bxa4 bxa4 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (1.916.363.817) 22933 TB:499
23/78 1:26 +0.80 24.Rxd5 exd5 25.Rd1 Qe8 26.Bxd5 a4 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.bxa4 bxa4 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (1.984.617.292) 22957 TB:499
24/78 1:31 +0.80 24.Rxd5 exd5 25.Rd1 Qe8 26.Bxd5 a4 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.bxa4 bxa4 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (2.113.661.821) 22994 TB:499
25/78 1:53 +0.80 24.Rxd5 exd5 25.Rd1 Qe8 26.Bxd5 a4 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.bxa4 bxa4 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (2.634.433.780) 23161 TB:630
26/78 2:45 +0.84 24.Rxd5 exd5 25.Rd1 Qe8 26.Bxd5 a4 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.bxa4 bxa4 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (3.890.735.695) 23448 TB:1.921
27/78 3:59 +0.84 24.Rxd5 exd5 25.Rd1 Qe8 26.Bxd5 a4 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.bxa4 bxa4 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (5.663.936.737) 23629 TB:2.508
28/87 8:19 +0.81 24.Rxd5 exd5 25.Rd1 a4 26.Bxd5 Qe8 27.Bxa8 Rxa8 28.Bf4 Bc3 29.Qg5 Qg8 30.Qxc5 Bxf6 31.bxa4 bxa4 32.Be5 Bg7 33.Bxg7+ Qxg7 34.Rd7 Kg8 35.Qd5 Rc8 36.Ra7 Qf6 37.Rxa4 (11.993.356.513) 23990 TB:25.633
no chess program was born totally from one mind. all chess programs have many ideas from many minds.
-
Jouni
- Posts: 3293
- Joined: Wed Mar 08, 2006 8:15 pm
Re: Test Position: Rxd5!! still to tough for my engines/hard
But scores are not very clear. After Houdini 4 main line we have
[D]2r3k1/5p1p/5q2/3Q4/R7/6P1/5P1P/6K1 b - - 0 37
Draw? We always need at least +2-+3 score to be quite sure.
[D]2r3k1/5p1p/5q2/3Q4/R7/6P1/5P1P/6K1 b - - 0 37
Draw? We always need at least +2-+3 score to be quite sure.
Jouni
-
Robert Flesher
- Posts: 1280
- Joined: Tue Aug 18, 2009 3:06 am
Re: Test Position: Rxd5!! still to tough for my engines/hard
Hi Andrew, I assumed that would transpose into the main line I offered after 26.Bxd5 Qe8.acase wrote:Robert Flesher wrote:acase wrote:I posted this position a little over a year and a half ago, and while it did look like Louis was able to solve it with the latest (at the time) development version of Stockfish (at a depth of 55/82), he said it did take a while and was difficult. I was wondering if any programs/hardware now can improve on that.
here is the position before Rxd5!!
[d]r2r1q1k/5p1p/4pP2/pppbB2Q/1b6/1P4P1/5PBP/R2R2K1 w - - 0 24
If you were wondering
where this position came from here is the game:
[Event "EU-chT9 sf01 email"]
[Site "ICCF email"]
[Date "2011.07.15"]
[Round "?"]
[White "Loinjak, Sinisa"]
[Black "Norrelykke, Svend GJ"]
[Result "1-0"]
[ECO "E04"]
[WhiteElo "2483"]
[BlackElo "2346"]
[PlyCount "67"]
[EventDate "2011.??.??"]
[EventType "corr"]
[EventRounds "12"]
[Source "ChessBase"]
[SourceDate "2012.11.12"]
[WhiteTeam "Croatia"]
[BlackTeam "Denmark"]
[WhiteTeamCountry "CRO"]
[BlackTeamCountry "DEN"]
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 a6 6. O-O Nc6 7. e3 Bd7 8. Qe2
b5 9. b3 cxb3 10. axb3 Bd6 11. Bb2 O-O 12. Rc1 Nd5 13. Nc3 Qe7 14. Ne4 Rfd8 15.
Ne5 Nxe5 16. dxe5 Bb4 17. Nf6+ gxf6 18. exf6 Qf8 19. Qh5 c5 20. Be5 Bc6 21. e4
Kh8 22. exd5 Bxd5 23. Rd1 a5 24. Rxd5 exd5 25. Rd1 d4 26. Be4 Qg8 27. g4 Re8
28. Rd3 Rxe5 29. Qxe5 Re8 30. Qf4 Rxe4 31. Qxe4 a4 32. bxa4 bxa4 33. Qd5 a3 34.
g5 1-0
Lovely position! I am curious as to whether the position after Rxd5!! is winning? Are there other ideas that may allow black to draw?
I looked at d4 and it seems that move may be losing although it seems to be the most logical move. How about :
[pgn] [Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r2r1q1k/5p1p/4pP2/pppbB2Q/1b6/1P4P1/5PBP/R2R2K1 w - - 0 24"]
[PlyCount "4"]
24. Rxd5 exd5 25. Rd1 a4 !?[/pgn]
....then [pgn] [Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r2r1q1k/5p1p/4pP2/pppbB2Q/1b6/1P4P1/5PBP/R2R2K1 w - - 0 24"]
[PlyCount "10"]
24. Rxd5 exd5 25. Rd1 a4 26. bxa4 bxa4 27. Bxd5 Qe8 28. Bxa8 Rxa8 !? [/pgn]
Is white winning here? White should be winning, but blacks pawns look dangerous.
Hello Robert, what if white instead of playing 26.bxa4 played 26.Bxd5 in your line?
