Author: Dann Corbit
Date: 17:11:29 10/31/02
Go up one level in this thread
On October 31, 2002 at 17:44:34, Dadi Jonsson wrote:
>On October 31, 2002 at 17:34:33, Dann Corbit wrote:
>
>>On October 31, 2002 at 17:32:12, Dadi Jonsson wrote:
>>
>>>The following sac was "truly unexpected". The player of the black pieces wrote a
>>>book(?) including this game and said he nearly fell off his chair when he saw
>>>White's next move. It is understandable that the move was unexpected. White
>>>sacrifice's his rook for the pawn on e6, which is thoroughly protected by two
>>>other pawns. Few human beings would have the imagination required to even start
>>>thinking about this possibility. This move is on Tim Krabbe's list of the
>>>greatest moves ever played.
>>>
>>>In spite of the above, this may not be such a spectacular move to a chess
>>>program! Many of them will find this move, given enough time. I believe that the
>>>original poster was asking for "truly unexpected sac" for us human beings and
>>>that is a different story!
>>>
>>> [D] rn1r2k1/pq1p1ppp/3Rp3/2p5/2P1b3/4QNP1/P3PPBP/3R2K1 w - -
>>
>>They tend to find Morphy's brilliant moves quickly. His tactical greatness
>>seems to be easily matched by modern hardware.
>
>This game was played in 1990, so it wasn't Morphy who found this move. I also
>think that few (if any) programs would find this move under tournament
>time-controls (unless you piled a number of CPUs on it).
No program I have tried finds it by search, but many of them have it in their
opening book. For example:
book off
[ black, 1 ]
rn1r2k1/pq1p1ppp/3Rp3/2p5/2P1b3/4QNP1/P3PPBP/3R2K1 w - -
rn1r2k1/pq1p1ppp/3Rp3/2p5/2P1b3/4QNP1/P3PPBP/3R2K1 w - -
-> increment adds 1440 s to soft time limit
-> soft time limit 3154.28 s
-> hard time limit 41599.9 s
5 -> 0:00.63 39622 0 turns
6 20 112 72441 Qe3xc5 Nb8-c6 Qc5-h5 Ra8-b8 Nf3-h4 Be4xg2
6 -> 0:01.45 111195 0 turns
7 38 2155 245373 Qe3xc5 Nb8-c6 Qc5-h5 Be4-c2 Nf3-g5 Bc2xd1
Qh5xf7 Kg8-h8 Bg2xc6
7 -> 0:33.63 430188 0 turns
8 26 4049 1035990 Qe3xc5 Nb8-c6 Qc5-h5 Qb7-c7 Nf3-g5 Be4-g6
Qh5-g4 Bg6-f5
8 -> 0:43.23 1571208 0 turns
9 32 5664 4154179 Qe3xc5 Nb8-c6 Qc5-e3 Be4-c2 Rd1-c1 Qb7-b4
Qe3-d2 Bc2-f5 Qd2xb4 Nc6xb4 Nf3-d4
9 -> 1:14.15 7939978 0 turns
10 21 10025 13030104 Qe3xc5 Nb8-c6 Qc5-h5 Be4-g6
10 -> 2:27.33 22695099 0 turns
11 69 31216 52526167 Qe3xc5 Nb8-c6 Qc5-h5 Ph7-h6 Nf3-g5 Be4-g6
Qh5-g4 Bg6-f5 Qg4-h4 Ph6xg5 Bg2xc6 Pg5xh4
Bc6xb7
11 -> 6:19.08 67376551 0 turns
12 50 63216 113026745 Qe3xc5 Nb8-c6 Qc5-h5 Qb7-c7 Qh5-h4 Be4-g6
Nf3-e1 Pf7-f6 Bg2xc6 Pd7xc6 Qh4-d4 Rd8xd6
Qd4xd6 Qc7-c8 Qd6-e7
12 -> 15:32.99 170993295 0 turns
interrupted
search aborted
Depth=13, Value=50, Time=955.95, Last turn=0.07, Nodes=175476245, N/s=183562
PV = Qe3xc5 Nb8-c6 Qc5-h5 Qb7-c7 Qh5-h4 Be4-g6 Nf3-e1 Pf7-f6
Bg2xc6 Pd7xc6 Qh4-d4 Rd8xd6 Qd4xd6 Qc7-c8 Qd6-e7
[ Solution incorrect 0.00%, 0/4 ]
book
book on
[ black, 1 ]
rn1r2k1/pq1p1ppp/3Rp3/2p5/2P1b3/4QNP1/P3PPBP/3R2K1 w - -
rn1r2k1/pq1p1ppp/3Rp3/2p5/2P1b3/4QNP1/P3PPBP/3R2K1 w - -
0 0 0 0 book2 Rd6xe6
[ Solution incorrect 0.00%, 0/5 ]
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