Author: Eelco de Groot
Date: 00:26:00 03/07/00
Go up one level in this thread
Thanks for link, Tina
I am a bit apprehensive about installing the software needed to play those
video-fragments you mention but there is so much interesting-looking material in
the "Kasparov Chess University" available that I think it is worth taking a
risk. But it is rather a big file, 5.69 MB, I downloaded it in 18 minutes.. I
hope that weighs not too heavily on the down-load budget.. Seeing Grandmasters
analyzing their games I think can be very instructive, well at least you can get
something of a feel for what they are thinking. Last week I watched Jan Timman
on TV here, a rerun of his "Schaken met Jan Timman" chess course. He asked
Karpov and Kasparov about their 16th matchgame in 1985, where Karpov should have
played 12. Be3 to effectively neutralize Black's set-up. I'm not sure if I
remember correctly that the 8. .. d5 was Adorjan's idea and if he was still
Kasparov's second then in that match, but I'm certain with modern day computers
Kasparov would never have played it. Anatoli Karpov recounted how one of his own
seconds had actually found 12. Bc1-e3 before the game,-Kasparov had played the
same variation already in the twelfth game-, but he forgot to tell his employer
about it... Chess history might have been different if he had remembered, at
least Kasparov would not have dealt such a crushing blow to Karpov as he did in
this 16th game. Maybe we would never have learnt about "The Octopus" then, the
all-controlling knight on d3. Kasparov said that he had analyzed such placements
of a knight on d3 in general before and that he figured it was worth an
exchange, rook for a light piece.
Modern programs I think have little difficulty finding 12. Be3, Century 1.2
(Fast Eval and Search "Off" 3'48" ; Fast Search 3'25"; Fast Eval 3'21"; Fast
Eval & Fast Search 2'55") finds it after a little more than 3 minutes on my
Celeron. (times for variation on plydepth 10.24) I didn't see any differences in
the given variations here only in the somewhat mysterious numbers after the
variations. I wonder if the speed-ups are different on an Athlon, I thought a
smaller eval might fit better in its 128 kB L1 but it has relatively slower L2.
Logfile for Century 1.2:Thinking....
+---+---+---+---+---+---+---+---+ Karpov,A - Kasparov,G
8 | *R| | *B| *Q| *K| | | *R|
+---+---+---+---+---+---+---+---+ 00:00:00 00:00:00
7 | | *p| | | | *p| *p| *p|
+---+---+---+---+---+---+---+---+
6 | *p| | | | | *N| | | Time infinite
+---+---+---+---+---+---+---+---+ Hash 28 Mb
5 | | | *B| p | | | | | Engine Rebel Century
+---+---+---+---+---+---+---+---+ Personality Rebel Century
4 | | *N| | | | | | | anti-GM Off
+---+---+---+---+---+---+---+---+ Fast Eval. Off
3 | N | | N | | | | | | Fast Search Off
+---+---+---+---+---+---+---+---+ Style Normal
2 | p | p | | | B | p | p | p | Strength Strongest
+---+---+---+---+---+---+---+---+ Search Normal Search
1 | R | | B | Q | K | | | R |
+---+---+---+---+---+---+---+---+ 10.. e4xd5 Nc6-b4
a b c d e f g h 11.. Bf1-e2 Bf8-c5
r1bqk2r/1p3ppp/p4n2/2bP4/1n6/N1N5/PP2BPPP/R1BQK2R w KQkq -
[Event "?"]
[Site "Moscow wch-m"]
[Date "1985.??.??"]
[Round "16"]
[White "Karpov,A"]
[Black "Kasparov,G"]
[Result "0-1"]
[WhiteElo "2705"]
[BlackElo "2715"]
[ECO "B44"]
1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3
d5 9.cxd5 exd5 10.exd5 Nb4 11.Be2 Bc5 0-1
00:00:00 1.00 0.04 12.O-O Nfxd5
00:00:00 1.11 0.94 12.Bf3
00:00:00 2.00 0.20 12.Bf3 Qe7+ 13.Ne2
00:00:00 2.20 0.25 12.O-O Nfxd5 13.Re1
00:00:00 3.00 0.25 12.O-O Nfxd5 13.Re1
00:00:00 3.23 0.25 12.Bg5
00:00:00 3.23 0.48 12.Bg5 Nbxd5 13.Nxd5 Qxd5 14.Bxf6
Qxd1+ 15.Rxd1 gxf6 (0)
00:00:00 4.00 0.48 12.Bg5 Nbxd5 13.Nxd5 Qxd5 14.Bxf6
Qxd1+ 15.Rxd1 gxf6 (0)
00:00:00 5.00 0.48 12.Bg5 Nbxd5 13.Nxd5 Qxd5 14.Bxf6
Qxd1+ 15.Rxd1 gxf6 (0)
00:00:02 6.00 0.66 12.Bg5 Bf5 13.Rc1 Rc8 14.g4 Bd7
15.Nc4 (1)
00:00:08 7.00 0.66 12.Bg5 Bf5 13.Rc1 Rc8 14.g4 Bd7
15.Nc4 (4)
00:00:22 8.00 0.62 12.Bg5 Nbxd5 13.Nxd5 Qxd5 14.Bxf6
Qxd1+ 15.Rxd1 gxf6 16.O-O Be6 (11)
00:01:09 9.00 0.63 12.Bg5 O-O 13.O-O Be7 14.Bxf6 Bxf6
15.Bf3 Qc7 (30)
00:02:25 10.00 0.55 12.Bg5 O-O 13.Ne4 Nbxd5 14.Nxc5
Qa5 15.Qd2 Qxc5 16.Rc1 Qa7 (89)
00:03:48 10.24 0.74 12.Be3 Bxe3 13.Qa4+ Nc6 14.fxe3
Nxd5 15.Rd1 Be6 16.Nxd5 (187)
00:04:28 11.00 0.65 12.Be3 Bxe3 13.Qa4+ Bd7 14.Qxb4
Qb6 15.Qxb6 Bxb6 16.O-O Bc5 17.Nc4
b5+ (249)
00:16:28 12.00 0.77 12.Be3 Bd6 13.Nc4 Nbxd5 14.Qa4+
Kf8 15.Nxd6 Qxd6 16.Nxd5+ Nxd5 (468)
Positions : 184.677.734
Nodes per second : 151.375
Extensions (checks) : 11.768.891 (6%)
Extensions (captures) : 2.078.272 (1%)
Extensions (king safety) : 197.036 (0%)
Extensions (on depth) : 2.789.278 (1%)
Extensions (remaining) : 108.121 (0%)
Extensions (total) : 16.941.598 (9%)
Hash Table : 1.256.908 1.255.445 (99%)
Average depth : 14
Deepest depth : 40
This takes longer on the Rebel 10 engine for ECTool, only after 55 minutes it
switches to 12. Bc1-e3:
Rebel Engine for ECTool. (c) Ed Schröder
Engine version : REBEL 9/10
Hash table size : 13 Mb
Analysis mode : Analyzing next move
Refresh interval : 1000 ms
Game begin
00:01 06.00 0.48 Bc1-g5 Ke8-g8 Ra1-c1 Rf8-e8 Bg5xf6 Qd8xf6 Ke1-g1
00:02 07.00 0.55 Bc1-g5 Ke8-g8 Bg5xf6 Qd8xf6 Ke1-g1 b7-b5 Na3-c2
00:10 08.00 0.46 Bc1-g5 Ke8-g8 Qd1-b3 Bc8-f5 Ke1-c1 b7-b5 Rh1-e1
00:19 09.00 0.46 Bc1-g5 Ke8-g8 Qd1-b3 Bc8-f5 Ke1-c1 b7-b5 Rh1-e1
00:45 10.00 0.57 Bc1-g5 Ke8-g8 Ke1-g1 Rf8-e8 Bg5xf6 Qd8xf6
02:19 11.00 0.66 Bc1-g5 Ke8-g8 Nc3-e4 Bc5-e7 d5-d6 Nf6xe4 Bg5xe7
05:04 12.00 0.61 Bc1-g5 Nb4xd5 Nc3xd5 Qd8xd5 Bg5xf6 Qd5xd1+ Ra1xd1
10:03 13.00 0.61 Bc1-g5 Nb4xd5 Nc3xd5 Qd8xd5 Bg5xf6 Qd5xd1+ Ra1xd1
36:24 14.00 0.63 Bc1-g5 Bc8-f5 Ke1-g1 b7-b5 Be2-h5 Ke8-g8 Qd1-f3
55:25 14.14 0.67 Bc1-e3 Bc5xe3 Qd1-a4+ Bc8-d7 Qa4xb4 Qd8-b6 Qb4xb6
50:02 15.00 0.71 Bc1-e3 Bc5-d6 Be3-g5 b7-b5 Na3-c2 Bc8-b7 Nc2-e3
08:39 16.00 0.66 Bc1-e3 Bc5xe3 Qd1-a4+ Bc8-d7 Qa4xb4 Qd8-b6 Qb4xb6
Crafty 17.5 has no trouble finding 12. Be3:
White(12): analyze
clearing hash tables
time surplus 0.00 time limit 30.00 (3:00)
nss depth time score variation (1)
6-> 1.31 1.02 12. Be3 Bxe3 13. Qa4+ Nd7 14. fxe3
Qe7 15. O-O <HT>
7 1.32 1.02 12. Be3 Bxe3 13. Qa4+ Nd7 14. fxe3
Qe7 15. O-O <HT>
7-> 2.81 1.02 12. Be3 Bxe3 13. Qa4+ Nd7 14. fxe3
Qe7 15. O-O <HT>
8 2.82 1.02 12. Be3 Bxe3 13. Qa4+ Nd7 14. fxe3
Qe7 15. O-O <HT>
8-> 8.66 1.02 12. Be3 Bxe3 13. Qa4+ Nd7 14. fxe3
Qe7 15. O-O <HT>
9 20.28 0.94 12. Be3 Bd6 13. Bf3 O-O 14. O-O Qc7
<HT>
9-> 40.84 0.94 12. Be3 Bd6 13. Bf3 O-O 14. O-O Qc7
<HT>
10 1:09 0.93 12. Be3 Bd6 13. Nc4 Nbxd5 14. Nxd6+
Qxd6 15. Bf3 Be6 16. Bd4 Rd8 17. Bxd5
Nxd5 18. O-O Nxc3 19. bxc3
10-> 2:25 0.93 12. Be3 Bd6 13. Nc4 Nbxd5 14. Nxd6+
Qxd6 15. Bf3 Be6 16. Bd4 Rd8 17. Bxd5
Nxd5 18. O-O Nxc3 19. bxc3
11 3:36 0.86 12. Be3 Bd6 13. Nc4 Nbxd5 14. Qa4+
Kf8 15. Nxd6 Nxc3 16. bxc3 Qxd6 17.
O-O <HT>
11-> 9:14 0.86 12. Be3 Bd6 13. Nc4 Nbxd5 14. Qa4+
Kf8 15. Nxd6 Nxc3 16. bxc3 Qxd6 17.
O-O <HT>
12 14:10 1.06 12. Be3 Bxe3 13. Qa4+ Bd7 14. Qxb4
Qb6 15. Qxb6 Bxb6 16. Nc4 Bc5 17. Ne5
Bb4 18. Nxd7 Bxc3+ 19. bxc3 Kxd7
12-> 25:17 1.06 12. Be3 Bxe3 13. Qa4+ Bd7 14. Qxb4
Qb6 15. Qxb6 Bxb6 16. Nc4 Bc5 17. Ne5
Bb4 18. Nxd7 Bxc3+ 19. bxc3 Kxd7
13 47:13 0.98 12. Be3 Be7 13. Bf3 O-O 14. O-O Bf5
15. g4 Bg6 16. d6 Bxd6 17. Nc4 Bc7
18. Bxb7
13-> 94:44 0.98 12. Be3 Be7 13. Bf3 O-O 14. O-O Bf5
15. g4 Bg6 16. d6 Bxd6 17. Nc4 Bc7
18. Bxb7
14 120:45 1.01 12. Be3 Be7 13. Bf3 O-O 14. O-O Bf5
15. Nc4 Rc8 16. Bb6 Qe8 17. Ne3 Bd3
18. Be2 Bg6
14-> 280:17 1.01 12. Be3 Be7 13. Bf3 O-O 14. O-O Bf5
15. Nc4 Rc8 16. Bb6 Qe8 17. Ne3 Bd3
18. Be2 Bg6
15 349:31 0.96 12. Be3 Be7 13. Bf3 O-O 14. O-O Bf5
15. g4 Bd3 16. Re1 Rc8 17. Bd4 Bd6
18. Re3 Bg6 19. Rc1
White(12): quit
execution complete.
Now I tried VERY HARD to keep this a sober, on topic post!
Thanks folks,
Eelco
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