Author: Dann Corbit
Date: 20:33:49 10/29/01
Go up one level in this thread
On October 29, 2001 at 23:27:37, Dann Corbit wrote:
>On October 29, 2001 at 22:17:12, K. Burcham wrote:
>
>>
>>in this position, Deep Blue plays 22...g4.
>>shredder5 in this position would play 22...Bg6, at depth 17/34
>>what does your program play, with deep search?
>>
>>
>>(1) Kasparov,G - Deep Blue [A07]
>>IBM Man vs Machine New York (1), 03.05.1997
>>[John Nunn]
>>
>>
>> [D] 3rr1k1/1p1n1p2/1qp2n1p/p1b1p1pb/4P3/PP2N1PP/1BP2PB1/R1Q1RNK1 b - -
>>
>>
>>"The computer desperately seeks to disturb White's plan.
>
>The computer has no concept of desperation.
>
>>Although this move
>>creates further kingisde weaknesses, it enable Black to develop some piece
>>activity. This is the critical phase. Everybody who has played a computer knows
>>the scenario: you get a strategically winning position, the computer makes some
>>desperate tactical lunge, you make a couple of inaccuracies and suddenly the
>>machine is all over you". (comment by Frederic Friedel)
>
>No argument there!
>
>ChessMaster 8000 output:
>
>Time Depth Score Positions Moves
>0:00 1/3 -0.04 2059 1...Bd4 2. Nd2 Bg6
>0:00 2/6 0.02 42104 1...Bd4 2. Nd2 Bg6 3. c3 Bc5 4.
> Qc2 Nf8
>0:01 3/7 0.16 124547 1...Bd4 2. Nd2 Bg6 3. c3 Bc5 4.
> Qc2 Nf8 5. Ndc4
>0:03 3/7 0.09 268740 1...g4 2. h4 Bg6 3. Qd2 Nf8 4.
> Qe2 a4 5. Nd2 Bxe3 6. fxe3 axb3
> 7. cxb3
>0:06 3/8 0.10 598533 1...g4 2. Nd2 gxh3 3. Bxh3 Qc7
> 4. c4 Bd4 5. Nf5 Nc5 6. Nxh6+ Kg7
>0:10 3/8 0.02 981004 1...Bg6 2. Nd2 Qc7 3. Bc3 b5 4.
> b4 Bd4 5. Qb2
>0:18 4/9 0.15 1798706 1...Bg6 2. Nd2 Qc7 3. Bc3 Bd4 4.
> Qb2 Nb6 5. Rad1 Bxc3 6. Qxc3
>1:10 4/10 0.14 6627204 1...Bg6 2. Nd2 Qc7 3. Bc3 Bd4 4.
> Qb2 Nb6 5. Rad1 Qe7 6. Nf5 Bxf5
> 7. exf5 Bxc3 8. Qxc3
>4:05 5/11 0.11 24328715 1...Bg6 2. Nd2 Qc7 3. Qd1 Bd4 4.
> c3 Ba7 5. b4 Nb6 6. Qe2 Qd6 7.
> Nec4 Nxc4 8. Nxc4
>14:02 6/12 0.03 88355386 1...Bg6 2. Nd2 Qc7 3. Bc3 Bd4 4.
> Qb2 Nc5 5. Nf5 Bxf5 6. exf5 Qd7
> 7. b4 Bxc3 8. Qxc3 Qxd2 9. Qxc5
>
>I suspect that more interesting would be the analysis of these:
>
>[D]3rr1k1/1p1n1p2/1qp2n1p/p1b1p2b/4P1p1/PP2N1PP/1BP2PB1/R1Q1RNK1 w - -
>[D]3rr1k1/1p1n1p2/1qp2nbp/p1b1p1p1/4P3/PP2N1PP/1BP2PB1/R1Q1RNK1 w - -
>Which are the aftermaths of the two choices. Often, when a computer will pound
>away for days on some position looking for an appropriate bm, it won't find it.
>But if you instead have it analyze the best choice, it will find it in 1/100th
>of the time. Not sure why it works that way.
Here is a quick look from Yace:
white ( 1): epdtest \which.epd
3rr1k1/1p1n1p2/1qp2n1p/p1b1p2b/4P1p1/PP2N1PP/1BP2PB1/R1Q1RNK1 w - -
solution
no solutions
usetime = 119.00, mintime = 119.00 maxtime = 119.00 tl 119.00 ml 0
136 0.022 -2.51 1t 1.Bxe5 Nxe5 2.hxg4 {-190}
171 0.023 -1.96 1t 1.Nxg4 Nxg4 2.hxg4 Bxf2+ 3.Kh2 Bxe1 4.gxh5
{-150}
233 0.023 -0.33 1t 1.hxg4 Bxg4 {0}
377 0.024 -0.19 1t 1.Nd2 {0}
400 0.024 -0.19 1. 1.Nd2 {0}
595 0.026 -0.27 2t 1.Nd2 Qc7 {0}
1934 0.031 -0.27 2. 1.Nd2 Qc7 {0}
4009 0.039 -0.20 3t 1.Nd2 Qc7 2.Nf5 {0}
5939 0.057 -0.20 3. 1.Nd2 Qc7 2.Nf5 {0}
10858 0.074 -0.21 4t 1.Nd2 Qc7 2.Nf5 gxh3 3.Bxh3 {0}
21626 0.108 -0.21 4. 1.Nd2 Qc7 2.Nf5 gxh3 3.Bxh3 {0}
43783 0.180 -0.21 5t 1.Nd2 Qc7 2.Nf5 gxh3 3.Bxh3 {0}
87487 0.306 -0.21 5. 1.Nd2 Qc7 2.Nf5 gxh3 3.Bxh3 {0}
219714 0.700 -0.21 6t 1.Nd2 gxh3 2.Bxh3 Bxe3 3.Rxe3 Bg4 4.Nc4 Qc5 {10}
395772 1.178 -0.21 6. 1.Nd2 gxh3 2.Bxh3 Bxe3 3.Rxe3 Bg4 4.Nc4 Qc5 {10}
1326752 4.087 -0.17 7t 1.Nd2 Re6 2.Ndc4 Qa7 3.b4 gxh3 4.Bxh3 {0}
1716638 5.156 -0.17 7. 1.Nd2 Re6 2.Ndc4 Qa7 3.b4 gxh3 4.Bxh3 {0}
3042231 9.207 -0.20 8t 1.Nd2 gxh3 2.Bxh3 Bxe3 3.Rxe3 Bg4 4.Bf1 Nc5
5.Qe1 Rd6 {10}
4862574 14.438 -0.20 8. 1.Nd2 gxh3 2.Bxh3 Bxe3 3.Rxe3 Bg4 4.Bf1 Nc5
5.Qe1 Rd6 {10}
12010773 37.313 -0.11 9t 1.Nd2 gxh3 2.Bxh3 Bxe3 3.Rxe3 Bg4 4.Bf1 Nc5
5.Qe1 Rd6 6.Bc4 {10}
15320678 46.985 -0.11 9. 1.Nd2 gxh3 2.Bxh3 Bxe3 3.Rxe3 Bg4 4.Bf1 Nc5
5.Qe1 Rd6 6.Bc4 {10}
35597988 1:49.6 -0.11 10t 1.Nd2 gxh3 2.Bxh3 Bxe3 3.Rxe3 Bg4 4.Bg2 Qc5
5.Rc3 Qb5 6.Rd3 c5 {10}
38968912 1:59.0 -0.11 10u. 1.Nd2 gxh3 2.Bxh3 Bxe3 3.Rxe3 Bg4 4.Bg2 Qc5
5.Rc3 Qb5 6.Rd3 c5 {10}
38968912 Nodes, 70.24% Leavenodes, 327495 Nodes/sec
36977270 eval, 52.13% score, 138707191 genmoves, 43.33% captures le 232/304
ext: pawn 22423, rcp 100452, chk 238036, repchk 52541, null 129, prune 1069866
htable: 0 store, 37791165 rejected, 37791313 probe, 0.0% f/p, 0.0% f/s
egtb probes 0, found 0 max_depth 31
3rr1k1/1p1n1p2/1qp2nbp/p1b1p1p1/4P3/PP2N1PP/1BP2PB1/R1Q1RNK1 w - -
solution
no solutions
usetime = 119.00, mintime = 119.00 maxtime = 119.00 tl 119.00 ml 0
8 0.000 -3.33 1t 1.Bxe5 Nxe5 {-270}
125 0.001 -0.64 1t 1.Rd1 Nxe4 2.Bxe4 Bxe4 3.Bxe5 Rxe5 4.Rxd7 {-20}
204 0.001 -0.24 1t 1.Nd2 {0}
228 0.001 -0.24 1. 1.Nd2 {0}
360 0.002 -0.31 2t 1.Nd2 Qc7 {0}
965 0.007 -0.31 2. 1.Nd2 Qc7 {0}
2697 0.015 -0.21 3t 1.Nd2 Qc7 2.Kh2 {0}
3257 0.020 -0.21 3. 1.Nd2 Qc7 2.Kh2 {0}
7488 0.037 -0.24 4t 1.Nd2 Qc7 2.Kh2 b5 {0}
10564 0.050 -0.24 4. 1.Nd2 Qc7 2.Kh2 b5 {0}
41478 0.152 -0.25 5t 1.Nd2 Qc7 2.c4 b5 3.Qc3 {0}
60079 0.209 -0.25 5. 1.Nd2 Qc7 2.c4 b5 3.Qc3 {0}
129423 0.435 -0.27 6t 1.Nd2 Qc7 2.Qd1 Bh5 3.Qc1 b5 {0}
228073 0.708 -0.27 6. 1.Nd2 Qc7 2.Qd1 Bh5 3.Qc1 b5 {0}
774192 2.369 -0.23 7t 1.Nd2 Re6 2.Bc3 Qc7 3.b4 Bxe3 4.Rxe3 {10}
1032514 3.146 -0.23 7. 1.Nd2 Re6 2.Bc3 Qc7 3.b4 Bxe3 4.Rxe3 {10}
3526131 11.119 -0.23 8t 1.Nd2 Qc7 2.c3 Re6 3.b4 Bxe3 4.Rxe3 Rd6 5.Qc2
{10}
4498053 13.966 -0.23 8. 1.Nd2 Qc7 2.c3 Re6 3.b4 Bxe3 4.Rxe3 Rd6 5.Qc2
{10}
11916975 36.831 -0.20 9t 1.Nd2 Qc7 2.c3 Bxe3 3.Rxe3 Nc5 4.Qc2 a4 5.b4
Qd6 {10}
14267498 43.668 -0.20 9. 1.Nd2 Qc7 2.c3 Bxe3 3.Rxe3 Nc5 4.Qc2 a4 5.b4
Qd6 {10}
38890946 1:59.0 -0.20 9f. 1.Nd2 Qc7 2.c3 Bxe3 3.Rxe3 Nc5 4.Qc2 a4 5.b4
Qd6 {10}
38890946 Nodes, 75.48% Leavenodes, 326842 Nodes/sec
37618256 eval, 52.21% score, 123340209 genmoves, 53.66% captures le 218/275
ext: pawn 4273, rcp 79318, chk 114012, repchk 20864, null 58, prune 974191
htable: 0 store, 38070403 rejected, 38070424 probe, 0.0% f/p, 0.0% f/s
egtb probes 0, found 0 max_depth 30
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