Author: Mike Byrne
Date: 07:23:41 02/08/04
As an aside, GM David Bronstein was a great computer chess enthusiast and
probably has more recorded games against computers than any other GM from his
era. His public record was 36-0-3 versus computers.
http://www.chessgames.com/perl/chesscollection?cid=1000627
========================================================================
[Event "Petropolis Interzonal"]
[Site "Petropolis"]
[Date "1973.??.??"]
[Round "11"]
[White "Bronstein, David I"]
[Black "Ljubojevic, Ljubomir"]
[Result "1-0"]
[ECO "B03"]
[WhiteElo "2585"]
[BlackElo "2570"]
[PlyCount "81"]
[EventDate "1973.??.??"]
[Source "ChessBase"]
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 c5 7. d5 e6 8. Nc3
exd5 9. cxd5 c4 10. Nf3 Bg4 11. Qd4 Bxf3 12. gxf3 Bb4 13. Bxc4 O-O 14. Rg1 g6
15. Bg5 Qc7 16. Bb3 Bc5 17. Qf4 Bxg1 18. d6 Qc8 19. Ke2 Bc5 20. Ne4 N8d7 21.
Rc1 Qc6 {
[d]r4rk1/pp1n1p1p/1nqP2p1/2b1P1B1/4NQ2/1B3P2/PP2K2P/2R5 w - - 0 22
Nolot #22. Interestingly, CI only took this game up to 21. Rc1 as a game
fragment with the notation that Rc1 +/-
}
22. Rxc5 Nxc5 23. Nf6+ Kh8 24. Qh4 Qb5+ 25. Ke3 h5 26. Nxh5 Qxb3+ 27.
axb3 Nd5+ 28. Kd4 Ne6+ 29. Kxd5 Nxg5 30. Nf6+ Kg7 31. Qxg5 Rfd8 32. e6 fxe6+
33. Kxe6 Rf8 34. d7 a5 35. Ng4 Ra6+ 36. Ke5 Rf5+ 37. Qxf5 gxf5 38. d8=Q fxg4
39. Qd7+ Kh6 40. Qxb7 Rg6 41. f4 1-0
========================================================================
Comment by Pierre Nolot, published in the July 1994 issue
of Gambisco
========================================================================
# Position: 2
# Move: W
r....rk. Bronstein - Ljubojevic, Petropolis itz 1973
pp.n.p.p 22.Rxc5!! Nxc5 23.Nf6+ Kh8 24.Qh4 Qb5+ (Now computers have
.nqP..p. a problem here : they think there is perpetual check, but...)
..b.P.B. 25.Ke3! wins 25... h5 26.Nxh5 Qxb3+ and Bronstein won in 41 moves.
....NQ.. If black plays 26... d5+ 27.Bxd5 Qd3 28.Kf2 Ne4+ 29.Bxe4 Qd4+
.B...P.. 30.Kg2 Qxb2+ 31.Kh3 +-
PP..K..P The best programs should be able to find 25.Rxc5!! in a few weeks.
..R.....
========================================================================
Comment by Feng-Hsiung Hsu , Deep Blue Inventor
========================================================================
White to move
8 R * - * - R K *
7 P P * N * P * P
6 - N Q p - * P *
5 * - B - p - b -
4 - * - * n q - *
3 * b * - * p * -
2 p p - * k * - p
1 * - r - * - * -
a b c d e f g h
Source: Bronstein-Ljubojevic, Petropolis 1973.
Solution is 1. Rc5! Nc5 2. Nf6 Kh8 3. Qh4... Solved under tournament
time control (3 minutes/move, plus extra time if the value for the move
is unstable). Plays it after 2 minutes. Actually spent 4.5 minutes before
the value stabilized to about a piece up.
========================================================================
Analysis bt Crafty 19.10 SE [Standard}
Dual 1.7 Ghz
Solution time:
2:41.51
========================================================================
White(1): r4rk1/pp1n1p1p/1nqP2p1/2b1P1B1/4NQ2/1B3P2/PP2K2P/2R5 w - - bm Rxc5;
"pn.02";
White(1): move
time surplus 0.00 time limit 166666:39 (166666:39)/(50)
time surplus 0.00 time limit 166666:39 (166666:39)/(50)
depth time score variation (1)
1 0.00 -3.30 1. Nxc5 Nxc5
1 0.00 -3.22 1. Nf6+ Kg7
1-> 0.00 -3.22 1. Nf6+ Kg7
2 0.00 -3.56 1. Nf6+ Nxf6 2. Bxf6 Rfe8
2 0.01 ++ 1. Nxc5!!
2 0.01 -2.79 1. Nxc5 Nxc5 2. Kf1
2-> 0.01 -2.79 1. Nxc5 Nxc5 2. Kf1
3 0.01 -- 1. Nxc5
3 0.03 -3.40 1. Nxc5 Nxc5 2. Be7 Qb5+ 3. Kf2 Nxb3
4. axb3
3 0.03 -3.13 1. Be7 Qb5+ 2. Ke1 Bb4+ 3. Kf2 Qxe5
4. Qxe5 Nxe5 5. Bxf8 Kxf8
3-> 0.05 -3.13 1. Be7 Qb5+ 2. Ke1 Bb4+ 3. Kf2 Qxe5
4. Qxe5 Nxe5 5. Bxf8 Kxf8 (s=3)
4 0.05 -3.13 1. Be7 Qb5+ 2. Ke1 Bb4+ 3. Kf2 Qxe5
4. Qxe5 Nxe5 5. Bxf8 Kxf8 (s=2)
4-> 0.06 -3.13 1. Be7 Qb5+ 2. Ke1 Bb4+ 3. Kf2 Qxe5
4. Qxe5 Nxe5 5. Bxf8 Kxf8 (s=4)
5 0.08 -3.03 1. Be7 Qb5+ 2. Ke1 Bb4+ 3. Kf2 Qxe5
4. Nf6+ Kg7 5. Qxe5 Nxe5 6. Bxf8+ Rxf8
(s=3)
5-> 0.11 -3.03 1. Be7 Qb5+ 2. Ke1 Bb4+ 3. Kf2 Qxe5
4. Nf6+ Kg7 5. Qxe5 Nxe5 6. Bxf8+ Rxf8
(s=3)
6 0.16 -3.03 1. Be7 Qb5+ 2. Ke1 Bb4+ 3. Kf2 Qxe5
4. Nf6+ Kg7 5. Qxe5 Nxe5 6. Bxf8+ Rxf8
(s=2)
6-> 0.31 -3.03 1. Be7 Qb5+ 2. Ke1 Bb4+ 3. Kf2 Qxe5
4. Nf6+ Kg7 5. Qxe5 Nxe5 6. Bxf8+ Rxf8
(s=6)
7 0.61 -3.42 1. Be7 Qb5+ 2. Kd2 Bd4 3. Bxf8 Qb4+
4. Ke2 Rxf8 5. Nf6+ Nxf6 6. Qxf6 Bxb2
(s=5)
7 0.89 -3.31 1. Nxc5 Nxc5 2. Rc2 Nd5 3. Bxd5 Qxd5
4. Rxc5 Qxc5 5. d7 (s=4)
7-> 1.45 -3.31 1. Nxc5 Nxc5 2. Rc2 Nd5 3. Bxd5 Qxd5
4. Rxc5 Qxc5 5. d7 (s=2)
8 2.22 -3.23 1. Nxc5 Nxc5 2. Bc4 Rac8 3. b4 Nxc4
4. Qxc4 Nd7 5. Qxc6 bxc6
8-> 3.98 -3.23 1. Nxc5 Nxc5 2. Bc4 Rac8 3. b4 Nxc4
4. Qxc4 Nd7 5. Qxc6 bxc6 (s=2)
9 5.28 -3.01 1. Nxc5 Nxc5 2. Rxc5 Qxc5 3. e6 Rae8
4. e7 Nc8 5. Kf1 Rxe7 6. dxe7 Nxe7
9-> 8.42 -3.01 1. Nxc5 Nxc5 2. Rxc5 Qxc5 3. e6 Rae8
4. e7 Nc8 5. Kf1 Rxe7 6. dxe7 Nxe7
(s=2)
10 10.30 -3.31 1. Nxc5 Nxc5 2. Rxc5 Qxc5 3. e6 Rae8
4. e7 Nc8 5. Kf1 Nxe7 6. Bxe7 Rxe7
7. dxe7 Qxe7
10 52.72 -3.15 1. Ke1 Rac8 2. e6 fxe6 3. Bxe6+ Kh8
4. Rxc5 Rxf4 5. Rxc6 Rxe4+ 6. fxe4
Rxc6
10-> 56.26 -3.15 1. Ke1 Rac8 2. e6 fxe6 3. Bxe6+ Kh8
4. Rxc5 Rxf4 5. Rxc6 Rxe4+ 6. fxe4
Rxc6 (s=2)
11 1:13 -3.17 1. Ke1 Qb5 2. Bf6 Nd5 3. Bxd5 Bb4+
4. Kf2 Qxd5 5. Rc7 Qd4+ 6. Kf1 Nc5
<HT>
11 1:46 ++ 1. Bf6!!
11 3:18 -1.40 1. Bf6 Qb5+ 2. Ke1 Bb4+ 3. Kf2 Nd5
4. Qh6 N7xf6 5. exf6 Qb6+ 6. Ke2 Nf4+
7. Qxf4 Qd4 8. Kf1 Rad8 9. Rd1 Qxb2
11-> 3:26 -1.40 1. Bf6 Qb5+ 2. Ke1 Bb4+ 3. Kf2 Nd5
4. Qh6 N7xf6 5. exf6 Qb6+ 6. Ke2 Nf4+
7. Qxf4 Qd4 8. Kf1 Rad8 9. Rd1 Qxb2
12 5:46 ++ 1. Bf6!!
12 10:19 0.00 1. Bf6 Qb5+ 2. Ke1 Nxf6 3. Nxf6+ Kg7
4. Nh5+ gxh5 5. Qg5+ Kh8 6. Qf6+ Kg8
7. Qg5+ Kh8
12-> 10:31 0.00 1. Bf6 Qb5+ 2. Ke1 Nxf6 3. Nxf6+ Kg7
4. Nh5+ gxh5 5. Qg5+ Kh8 6. Qf6+ Kg8
7. Qg5+ Kh8
13 18:01 0.00 1. Bf6 Qb5+ 2. Ke1 Nxf6 3. Nxf6+ Kg7
4. Nh5+ gxh5 5. Qg5+ Kh8 6. Qf6+ Kg8
7. Qg5+ Kh8
13-> 18:47 0.00 1. Bf6 Qb5+ 2. Ke1 Nxf6 3. Nxf6+ Kg7
4. Nh5+ gxh5 5. Qg5+ Kh8 6. Qf6+ Kg8
7. Qg5+ Kh8
14 37:14 0.00 1. Bf6 Qb5+ 2. Ke1 Nxf6 3. Nxf6+ Kg7
4. Nh5+ gxh5 5. Qg5+ Kh8 6. Qf6+ Kg8
7. Qg5+ Kh8
14-> 53:35 0.00 1. Bf6 Qb5+ 2. Ke1 Nxf6 3. Nxf6+ Kg7
4. Nh5+ gxh5 5. Qg5+ Kh8 6. Qf6+ Kg8
7. Qg5+ Kh8 (s=2)
15 98:34 0.00 1. Bf6 Qb5+ 2. Ke1 Nxf6 3. Nxf6+ Kg7
4. Nh5+ gxh5 5. Qg5+ Kh8 6. Qf6+ Kg8
7. Qg5+ Kh8
15 161:51 ++ 1. Rxc5!!
15 236:14 3.41 1. Rxc5 Qxc5 2. Nxc5 Nxc5 3. Be7 Nxb3
4. Bxf8 Rxf8 5. axb3 Nd7 6. Kd2 Re8
7. Qa4 Rd8 8. Qf4
15-> 236:14 3.41 1. Rxc5 Qxc5 2. Nxc5 Nxc5 3. Be7 Nxb3
4. Bxf8 Rxf8 5. axb3 Nd7 6. Kd2 Re8
7. Qa4 Rd8 8. Qf4 (s=2)
16 253:33 ++ 1. Rxc5!!
16-> 297:24 3.80 1. Rxc5 Qxc5 2. Nxc5 Nxc5 3. Be7 Nxb3
4. Bxf8 Rxf8 5. axb3 Nd7 6. Kd2 Re8
7. Qa4 Rd8 8. Qf4 (s=8)
? 17 332:15 1/47* 1. Rxc5
White(1): ?
time=332:15 cpu=198% mat=-4 n=22721319555 fh=90% nps=1.14M
ext-> chk=1610102954 cap=48792827 pp=192476595 1rep=171883091 m
=27553723
predicted=0 nodes=22721319555 evals=1756929296
endgame tablebase-> probes=0 hits=0
SMP-> split=6206 stop=1374 data=9/128 cpu=660:52 elap=332:
White(1): Rxc5
time used: 332:15
This page took 0.01 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
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