Hard to understand for engines study

[kiroje]

After an 10+ years hiatus from OTB chess I finally got back and started to look in my stowed away chess books.

I fell over this one from Schachstudien der Weltmeister - Karpow/Gik

This is W. Smyslow 1976
[pgn][Event ""]
[Site ""]
[Date ""]
[Round ""]
[White ""]
[Black ""]
[Result ""]
[FEN "2k5/1p6/p7/P1PP1K2/3b4/2p5/8/4B3 w - - 0 1"]
[Setup "1"]

1. c6 c2 2. Bd2 Bb2 3. d6 bxc6 4. Ke6 c1=B 5. d7+ Kc7 6. d8=Q+ Kxd8 7. Kd6 c5 8.
Kxc5 Kc7 9. Be1 $10 [/pgn]

This one seems to be really hard for engines to understand - probably because of the same colored bishops for black. Is there and engine that understands its draw ?
BTW Syzygy says 9.Be1 is = so it seems to be correct.

[zullil]

After an 10+ years hiatus from OTB chess I finally got back and started to look in my stowed away chess books.

I fell over this one from Schachstudien der Weltmeister - Karpow/Gik

This is W. Smyslow 1976
[pgn][Event ""]
[Site ""]
[Date ""]
[Round ""]
[White ""]
[Black ""]
[Result ""]
[FEN "2k5/1p6/p7/P1PP1K2/3b4/2p5/8/4B3 w - - 0 1"]
[Setup "1"]

1. c6 c2 2. Bd2 Bb2 3. d6 bxc6 4. Ke6 c1=B 5. d7+ Kc7 6. d8=Q+ Kxd8 7. Kd6 c5 8.
Kxc5 Kc7 9. Be1 $10 [/pgn]

This one seems to be really hard for engines to understand - probably because of the same colored bishops for black. Is there and engine that understands its draw ?
BTW Syzygy says 9.Be1 is = so it seems to be correct.

Black wins:

info depth 47 seldepth 61 multipv 1 score cp -14891 nodes 573836320 nps 2266443 hashfull 853 tbhits 38613590 time 253188 pv c5c6 b7c6 f5e6 c6d5 e6d5 c3c2 e1d2 d4b2 d5c6 c8d8 d2g5 d8e8 c6c7 b2f6 g5c1 e8e7 c7c6 e7e6 c6c5 e6e5 c5c4 e5e4 c1h6 f6d4 h6c1 d4e3 c1a3 e3g5 a3b2 g5d2 c4b3 e4d3 b3a4 c2c1q b2c1

[Alayan]

Yet another cooked study.

[Vinvin]

...

Black wins:

info depth 47 seldepth 61 multipv 1 score cp -14891 nodes 573836320 nps 2266443 hashfull 853 tbhits 38613590 time 253188 pv c5c6 b7c6 f5e6 c6d5 e6d5 c3c2 e1d2 d4b2 d5c6 c8d8 d2g5 d8e8 c6c7 b2f6 g5c1 e8e7 c7c6 e7e6 c6c5 e6e5 c5c4 e5e4 c1h6 f6d4 h6c1 d4e3 c1a3 e3g5 a3b2 g5d2 c4b3 e4d3 b3a4 c2c1q b2c1

Yes, 1.c6?? is a mistake that lose after 1...bxc6!

Code: Select all

-149,00	2.d6 Kd7 3.Bg3 c2 4.Bf4 Bb2 5.Be3 c1Q 6.Bxc1 Bxc1 7.Ke5
-149,00	2.Bg3 c2 3.Bf4 Bb2 4.d6 Kd7 5.Be3 c1Q 6.Bxc1 Bxc1 7.Ke5
-149,00	2.Bh4 c2 3.Bg5 Bb2 4.d6 Kd7 5.Ke4 c1Q 6.Bxc1 Bxc1 7.Ke5
-24,62	2.Ke6 c2 3.Bd2 Bc3 4.Bc1 Kc7 5.d6+ Kb7 6.Kf5 Bxa5 7.Be3

[kiroje]

You are completely right, im using ChessX for analysing and for some reason it didnt show the syzygy score :/

Well you are right - nothing is sacred anymorer ...

BTW on another note - the book and studies is still quite entertaining

[peter]

info depth 47 seldepth 61 multipv 1 score cp -14891 nodes 573836320 nps 2266443 hashfull 853 tbhits 38613590 time 253188 pv c5c6 b7c6 f5e6 c6d5 e6d5 c3c2 e1d2 d4b2 d5c6 c8d8 d2g5 d8e8 c6c7 b2f6 g5c1 e8e7 c7c6 e7e6 c6c5 e6e5 c5c4 e5e4 c1h6 f6d4 h6c1 d4e3 c1a3 e3g5 a3b2 g5d2 c4b3 e4d3 b3a4 c2c1q b2c1

After 3...Kxd5 in your line, it's -#37 according to Losomosovs.

[mwyoung]

After an 10+ years hiatus from OTB chess I finally got back and started to look in my stowed away chess books.

I fell over this one from Schachstudien der Weltmeister - Karpow/Gik

This is W. Smyslow 1976
[pgn][Event ""]
[Site ""]
[Date ""]
[Round ""]
[White ""]
[Black ""]
[Result ""]
[FEN "2k5/1p6/p7/P1PP1K2/3b4/2p5/8/4B3 w - - 0 1"]
[Setup "1"]

1. c6 c2 2. Bd2 Bb2 3. d6 bxc6 4. Ke6 c1=B 5. d7+ Kc7 6. d8=Q+ Kxd8 7. Kd6 c5 8.
Kxc5 Kc7 9. Be1 $10 [/pgn]

This one seems to be really hard for engines to understand - probably because of the same colored bishops for black. Is there and engine that understands its draw ?
BTW Syzygy says 9.Be1 is = so it seems to be correct.

Showing once again humans suck at chess
c6 is not an error, black is winning in all lines. The study is cooked because of 1.c6 c2?. This leads to a draw. 1.c6 bxc6! wins and is easy for the computer to see, not so much for humans.

[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "2k5/1p6/p7/P1PP1K2/3b4/2p5/8/4B3 w - - 0 1"]
[PlyCount "41"]

{[#]} 1. c6 bxc6 (1... c2 2. Bd2 Bb2 3. d6 bxc6 4. Ke6 c1=B 5. d7+ Kc7 6. d8=Q+
Kxd8 7. Kd6 c5 8. Kxc5 Kc7 9. Be1 Be3+ 10. Kd5 Kb7 11. Bb4 Bf6 12. Ba3 Bfd4 13.
Bd6 Ba1 14. Be7 Bad4 15. Bd8 Bb2 16. Be7 Bbd4 17. Bd6 Bg7 18. Bg3 Bd2 19. Bf2
Bf6 20. Bb6 Bfc3 21. Bg1 $19 {-3.03/73}) 2. Ke6 c2 3. Bd2 Bc3 4. Bc1 Kc7 5. d6+
Kb7 6. d7 Bxa5 7. Bb2 Bc7 8. Kf5 a5 9. Kg4 Bd8 10. Kf5 Ka6 11. Ke4 Kb6 12. Kf5
a4 13. Bc1 Kc5 14. Ke6 Kb4 15. Bb2 a3 16. Bf6 Bxf6 17. Kxf6 a2 18. d8=Q a1=Q+
19. Kf7 Qa7+ 20. Kg6 c1=Q 21. Qh4+ {-#10/71} *

[mwyoung]

After an 10+ years hiatus from OTB chess I finally got back and started to look in my stowed away chess books.

I fell over this one from Schachstudien der Weltmeister - Karpow/Gik

This is W. Smyslow 1976
[pgn][Event ""]
[Site ""]
[Date ""]
[Round ""]
[White ""]
[Black ""]
[Result ""]
[FEN "2k5/1p6/p7/P1PP1K2/3b4/2p5/8/4B3 w - - 0 1"]
[Setup "1"]

1. c6 c2 2. Bd2 Bb2 3. d6 bxc6 4. Ke6 c1=B 5. d7+ Kc7 6. d8=Q+ Kxd8 7. Kd6 c5 8.
Kxc5 Kc7 9. Be1 $10 [/pgn]

This one seems to be really hard for engines to understand - probably because of the same colored bishops for black. Is there and engine that understands its draw ?
BTW Syzygy says 9.Be1 is = so it seems to be correct.

Showing once again humans suck at chess
c6 is not an error, black is winning in all lines. The study is cooked because of 1.c6 c2?. This leads to a draw. 1.c6 bxc6! wins and is easy for the computer to see, not so much for humans.



[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "2k5/1p6/p7/P1PP1K2/3b4/2p5/8/4B3 w - - 0 1"]
[PlyCount "41"]

{[#]} 1. c6 bxc6 (1... c2 2. Bd2 Bb2 3. d6 bxc6 4. Ke6 c1=B 5. d7+ Kc7 6. d8=Q+
Kxd8 7. Kd6 c5 8. Kxc5 Kc7 9. Be1 Be3+ 10. Kd5 Kb7 11. Bb4 Bf6 12. Ba3 Bfd4 13.
Bd6 Ba1 14. Be7 Bad4 15. Bd8 Bb2 16. Be7 Bbd4 17. Bd6 Bg7 18. Bg3 Bd2 19. Bf2
Bf6 20. Bb6 Bfc3 21. Bg1 $19 {-3.03/73}) 2. Ke6 c2 3. Bd2 Bc3 4. Bc1 Kc7 5. d6+
Kb7 6. d7 Bxa5 7. Bb2 Bc7 8. Kf5 a5 9. Kg4 Bd8 10. Kf5 Ka6 11. Ke4 Kb6 12. Kf5
a4 13. Bc1 Kc5 14. Ke6 Kb4 15. Bb2 a3 16. Bf6 Bxf6 17. Kxf6 a2 18. d8=Q a1=Q+
19. Kf7 Qa7+ 20. Kg6 c1=Q 21. Qh4+ {-#10/71} *