In 2003 match Kasparov-Junior (FIDE Man - Machine WC (2003) ), game 5/6, Junior 8 (Black), in an equal position, made a sack, attacking White King (Kasparov), and after a brawl, game ended in a draw (Kasparov chickening out and accepting a 3-fold). I remember I bought Junior 8 due to this speculative sack, which was unclear at that time.
Game:
[pgn][Event "FIDE Man - Machine WC"]
[Site "New York, NY USA"]
[Date "2003.05.02"]
[EventDate "2003.01.26"]
[Round "5"]
[Result "1/2-1/2"]
[White "Garry Kasparov"]
[Black "Deep Junior (Computer)"]
[ECO "E48"]
[WhiteElo "2847"]
[BlackElo "?"]
[PlyCount "38"]
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. cxd5 exd5
7. Nge2 Re8 8. O-O Bd6 9. a3 c6 10. Qc2 Bxh2+ 11. Kxh2 Ng4+
12. Kg3 Qg5 13. f4 Qh5 14. Bd2 Qh2+ 15. Kf3 Qh4 16. Bxh7+ Kh8
17. Ng3 Nh2+ 18. Kf2 Ng4+ 19. Kf3 Nh2+ 1/2-1/2[/pgn]
But Stockfish dev shows that Junior 8 sack in an equal position was unsound:
[d]rnbqr1k1/pp3ppp/2p2n2/3p4/3P4/P1NBP3/1PQ1NPPb/R1B2RK1 w - -
Engine: Stockfish 090317 64 BMI2 (4096 MB)
by T. Romstad, M. Costalba, J. Kiiski, G.
53/97 318:23 +1.07 11.Kxh2 Ng4+ 12.Kg3 Qg5 13.f4 Qh5
14.Bd2 Qh2+ 15.Kf3 Qh4 16.g3 Nh2+
17.Kf2 Ng4+ 18.Ke1 Qh3 19.Nd1 Nh2
20.Rg1 g6 21.f5 Nf3+ 22.Kf2 Nxg1
23.Kxg1 Bxf5 24.Bxf5 (110.630.222.438) 5790
best move: Kg1xh2 time: 318:23.938 min n/s: 5.790.964 nodes: 110.630.222.438
Sack busted
Moderators: hgm, Rebel, chrisw
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Dann Corbit
- Posts: 12540
- Joined: Wed Mar 08, 2006 8:57 pm
- Location: Redmond, WA USA
Re: Sack busted
The same sort of horror I feel when I use modern hardware to analyze a Morphy or Anderson game.
Though once in a while it takes a long deep search to bear them out.
With many old timer games, the accepting of the sac is the mistake.
Though once in a while it takes a long deep search to bear them out.
With many old timer games, the accepting of the sac is the mistake.
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
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Laskos
- Posts: 10948
- Joined: Wed Jul 26, 2006 10:21 pm
- Full name: Kai Laskos
Re: Sack busted
OTB the things are looking different, and Kasparov was in complicated, sharp tactical position until the end, with his King dangerously hanging around Black pieces. Many of Tal's OTB games have unsound speculative sacks, but he himself admitted that. It's an unthankful task to debunk his combinations with engines. Here is typical one:Dann Corbit wrote:The same sort of horror I feel when I use modern hardware to analyze a Morphy or Anderson game.
Though once in a while it takes a long deep search to bear them out.
With many old timer games, the accepting of the sac is the mistake.
[pgn][Event "October Revolution 50"]
[Site "Moscow"]
[Date "1967.??.??"]
[Round "2"]
[White "Tal, Mihail"]
[Black "Filip, Miroslav"]
[Result "1-0"]
[ECO "B17"]
[Annotator "Dolmatov"]
[PlyCount "55"]
[EventDate "1967.05.21"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "URS"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Ng3 e6 7. Bd3 Be7 (
7... c5 $5 8. O-O cxd4 9. Nxd4 Bc5 10. Nf3 O-O $10) 8. Qe2 c5 9. O-O O-O 10.
Rd1 cxd4 (10... Qc7 11. c4 Re8 12. dxc5 Nxc5 13. Bc2 Ncd7 14. Ne4 b6 15. Ba4
Rd8 $10 {Tal,M-Ciric,D/Budva/1967/ Inf 4/197/}) 11. Nxd4 Re8 12. b3 Qb6 13. Bb2
Nf8 (13... Nc5 $5 14. Bc4 Bd7 (14... Na4 15. bxa4 $5 (15. Bb5 $2 Nxb2 16. Bxe8
Nxd1) 15... Qxb2 16. Nb5 {/\ Ra-b1} Qb4 17. Nc7 $14) 15. Nf3 Bc6 16. Ne5 Bd5)
14. Nf3 Bd7 15. Ne5 Rad8 16. Ne4 Nxe4 17. Bxe4 (17. Nxd7 $2 Qxf2+ 18. Qxf2 Nxf2
19. Nxf8 Nxd1) 17... Bc8 18. Qh5 Ng6 (18... g6 19. Qf3 $5 (19. Qh6 f6 $13)
19... f6 20. Ng4 e5 21. Ne3 $14) 19. Nxf7 Kxf7 20. Qxh7 e5 21. Rxd8 Rxd8 22.
Qh5 Qe6 $6 (22... Qf6 $5 23. f4 Bc5+ 24. Kh1 $44) 23. h3 Bc5 24. Kh1 {/\ f4}
Bd4 25. Rd1 {/\ Rd3} Rd6 (25... Bb6 26. Rxd8 Bxd8 27. f4 $16) 26. Ba3 Ra6 $6 (
26... Rd8 27. Rd3 $16) 27. Rxd4 exd4 28. Bd5 (28. Bd5 Rxa3 29. Qf5+ Ke7 30.
Bxe6 Bxe6 31. Qxg6 $18) 1-0[/pgn]
Crucial here is the sack of the Knight occurring at move 19, after this fairly equal position:
[d]2brr1k1/pp2bppp/1q2p1n1/4N2Q/4B3/1P6/PBP2PPP/R2R2K1 w - -
Engine: Stockfish 090317 64 BMI2 (1024 MB)
38/59 10:12 +0.22 19.g3 (3.371.397.159) 5502
After the sack Nxf7:
[d]2brr1k1/pp2bNpp/1q2p1n1/7Q/4B3/1P6/PBP2PPP/R2R2K1 b - -
Engine: Stockfish 090317 64 BMI2 (1024 MB)
39/70 4:47 -0.65++ 19...Kxf7 (1.694.821.931) 5895
OTB Miroslav Filip (a strong GM at that time) made mistakes in a sharp position, and lost.
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Dann Corbit
- Posts: 12540
- Joined: Wed Mar 08, 2006 8:57 pm
- Location: Redmond, WA USA
Re: Sack busted
Yes, that's the worst part.
Often, we look carefully at the analysis and think we understand why the sac was so brilliant.
Or even come up with the analysis on our own.
Then, the evil, soul-less machine grinds out a dull, uninspiring win for the opposition.
Simultaneously beautiful and tragic.
Too many things are like that.
Often, we look carefully at the analysis and think we understand why the sac was so brilliant.
Or even come up with the analysis on our own.
Then, the evil, soul-less machine grinds out a dull, uninspiring win for the opposition.
Simultaneously beautiful and tragic.
Too many things are like that.
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
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Sean Evans
- Posts: 1777
- Joined: Thu Jun 05, 2008 10:58 pm
- Location: Canada
Re: Sack busted
When Kasparov was playing this game he believed that the Bishop sac was unsound, but he took the draw "just in case" 
Computers have a way of scaring humans!
Computers have a way of scaring humans!