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Subject: Re: DIEP at GCP positions

Author: Vincent Diepeveen

Date: 10:58:21 10/29/01

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On October 28, 2001 at 18:06:34, Gian-Carlo Pascutto wrote:

[D]r1b1r1k1/5pbp/p1pQ1np1/q3n3/2pBP3/2N2P2/PP4PP/1KNR1B1R w - - 0 15

>Sjeng played b4, which loses. How long to avoid it, and how long
>to see it loses?

DIEP doesn't consider b4:

00:00 0 0 52 (0) 1 1.132 Bd4xe5 Re8xe5 Bf1xc4
00:00 0 0 266 (0) 2 1.132 Bd4xe5 Re8xe5 Bf1xc4
00:00 0 0 1053 (0) 3 1.462 Bd4xe5 Qa5xe5 Qd6xe5 Re8xe5 Bf1xc4
00:00 0 0 3971 (0) 4 1.462 Bd4xe5 Qa5xe5 Qd6xe5 Re8xe5 Bf1xc4
00:00 0 0 10874 (0) 5 1.713 Bd4xe5 Qa5xe5 Qd6xe5 Re8xe5 Rd1-d8 Re5-e8
00:00 0 0 43234 (3838) 6 1.323 Bd4xe5 Qa5xe5 Bf1xc4 Bc8-d7 Qd6xe5 Re8xe5
++ f3-f4
00:00 0 0 77894 (7702) 6 1.552 f3-f4 Re8-e6 Qd6-c5 Qa5xc5 Bd4xc5 Nf6-d7
00:02 0 0 204383 (10821) 7 1.012 f3-f4 Re8-e6 Qd6-c5 Qa5xc5 Bd4xc5 Ne5-d7 Bc5-d4
 c6-c5 Bd4xf6 Re6xf6
++ d4-e5
00:02 0 0 244569 (15932) 7 1.566 Bd4xe5 Qa5xe5 Bf1xc4 Bc8-d7 Qd6xe5 Re8xe5
00:03 0 0 413684 (31571) 8 1.421 Bd4xe5 Qa5xe5 Qd6xe5 Re8xe5 Bf1xc4 Bc8-e6 Bc4xe
6 Re5xe6 Nc1-b3
00:11 0 0 1267898 (198100) 9 1.540 Bd4xe5 Qa5xe5 Bf1xc4 Bc8-d7 Qd6xe5 Re8xe5 b2-
b4 Bd7-e6 Nc1-d3
00:24 0 0 2853761 (346389) 10 1.588 Bd4xe5 Qa5xe5 Qd6xe5 Re8xe5 Bf1xc4 Bc8-e6 Nc
1-d3 Re5-g5 Bc4xe6 f7xe6 Nd3-f4
00:55 0 0 6629164 (509322) 11 1.588 Bd4xe5 Qa5xe5 Qd6xe5 Re8xe5 Bf1xc4 Bc8-e6 Nc
1-d3 Re5-g5 Bc4xe6 f7xe6 Nd3-f4

after i play b4 then i restart with cleared hashtables:

00:00 0 0 5 (0) 1 0.485 c4xb3 Nc1xb3
00:00 0 0 556 (0) 2 -1.714 c4xb3 Nc1xb3 Nf6xe4 Nc3xe4
++ a5-a3
00:00 0 0 1263 (0) 2 -0.898 Qa5-a3 Bd4xe5 Nf6xe4 Qd6xc6 Re8xe5 Nc3xe4 Qa3xb4 Kb1
-a1
00:00 0 0 2532 (0) 3 -0.898 Qa5-a3 Bd4xe5 Nf6xe4 Qd6xc6 Re8xe5 Nc3xe4 Qa3xb4 Kb1
-a1
00:00 0 0 9249 (142) 4 -0.556 Qa5-a3 Bd4xe5 Nf6xe4 f3xe4 Bg7xe5 Qd6xc6 Qa3xc3 Qc
6xe8 Kg8-g7
00:00 0 0 23806 (142) 5 -0.165 Qa5-a3 Bd4xe5 Nf6xe4 Nc3xe4 Bg7xe5 Ne4-f6 Kg8-h8
00:00 0 0 72360 (142) 6 -0.137 Qa5-a3 Bd4xe5 Nf6xe4 Nc3xe4 Bg7xe5 Qd6-d2 Ra8-b8
00:01 0 0 168997 (142) 7 -0.137 Qa5-a3 Bd4xe5 Nf6xe4 Nc3xe4 Bg7xe5 Qd6-d2 Ra8-b8
00:04 0 0 461171 (3493) 8 0.001 Qa5-a3 Bd4xe5 Nf6xe4 Nc3xe4 Bg7xe5 Qd6-d2 Ra8-b8
 Bf1xc4 Rb8xb4 Bc4-b3
00:11 0 0 1302832 (13163) 9 0.001 Qa5-a3 Bd4xe5 Nf6xe4 Nc3xe4 Bg7xe5 Qd6-d2 Ra8-
b8 Bf1xc4 Rb8xb4 Bc4-b3

So diep needs 3 ply to see that b4 is around 0.6 pawns difference to Bxe5

[D]4r1k1/1pr4p/p2p1qp1/P1nP3n/1RN1P3/2N2p2/2Q2PPP/1R4K1 w - - 0 26

00:00 0 0 5 (0) 1 0.987 g2xf3
00:00 0 0 114 (0) 2 0.192 g2xf3 Nh5-f4
++ b4-b6
00:00 0 0 261 (0) 2 0.307 Rb4-b6 f3xg2 Nc4xd6
00:00 0 0 1492 (0) 3 0.307 Rb4-b6 f3xg2 Nc4xd6
++ g2-f3
00:00 0 0 2071 (175) 3 0.759 g2xf3 Nh5-f4 Kg1-h1
00:00 0 0 6716 (522) 4 0.247 g2xf3 Nh5-f4 Nc3-e2 Qf6-g5 Kg1-f1
++ g2-g3
00:00 0 0 9285 (607) 4 0.379 g2-g3 Rc7-e7 h2-h3 Kg8-f7
00:00 0 0 21677 (945) 5 0.462 g2-g3 Rc7-e7 e4-e5 d6xe5 Nc3-e4 Nc5xe4 Qc2xe4
++ e4-e5
00:00 0 0 45275 (3108) 5 0.610 e4-e5 Qf6-g5 g2-g3 d6xe5 Nc3-e4 Nc5xe4 Qc2xe4
00:00 0 0 67822 (4790) 6 0.037 e4-e5 d6xe5 d5-d6 Qf6-g5 g2-g3 Rc7-d7
++ g2-g3
00:01 0 0 93429 (6838) 6 0.496 g2-g3 Rc7-e7 h2-h3 Re7-d7 Nc3-a4 Nc5xe4 Rb4xb7
++ b4-b6
00:02 0 0 330143 (40640) 7 0.462 g2-g3 Rc7-e7 e4-e5 d6xe5 Nc3-e4 Nc5xe4 Qc2xe4
++ e4-e5
00:03 0 0 372047 (44802) 7 0.581 e4-e5 d6xe5 d5-d6 Qf6-g5 Nc4-e3 Rc7-d7 Nc3-d5 N
c5-e6
00:04 0 0 627377 (53481) 8 0.446 e4-e5 d6xe5 d5-d6 Qf6-g5 Nc4-e3 Rc7-c6 Qc2-a2 K
g8-g7
++ g2-g3
00:23 0 0 3096472 (560124) 9 0.284 e4-e5 Re8xe5 Nc4xe5 Qf6xe5 g2-g3 Nh5-f6 Qc2-d
2 Nc5-d7 Rb1-c1 b7-b5
++ g2-g3
00:45 0 0 6251197 (1554624) 9 0.505 g2-g3 Qf6-f8 Rb1-e1 Nh5-f6 e4-e5 d6xe5 Re1xe
5 Rc7-e7 Re5-e3 Re7xe3 Nc4xe3
01:13 0 0 10398106 (3071404) 10 0.480 g2-g3 Rc7-d7 Rb4-b6 Qf6-f8 Nc4-d2 Nh5-f6 Q
c2-d1 Rd7-f7 Nd2-c4 Nc5xe4 Nc3xe4

Now after Rb6 with cleared hashtables restart:

00:00 0 0 6 (0) 1 -0.307 f3xg2 Nc4xd6
00:00 0 0 103 (0) 2 -0.307 f3xg2 Nc4xd6
00:00 0 0 1082 (0) 3 -0.224 f3xg2 Nc4xd6 Re8-f8 Nd6xb7
00:00 0 0 3228 (74) 4 -0.224 f3xg2 Nc4xd6 Re8-f8 Nd6xb7
00:00 0 0 23607 (1423) 5 -2.455 f3xg2 Nc4xd6 Re8-e7 Nd6-f5 Qf6-g5 Nf5xe7 Rc7xe7

++ c5-e4
00:00 0 0 40073 (1612) 5 -2.295 Nc5xe4 Nc3xe4 Qf6-f5 g2xf3 Re8-c8 Rb6xd6 Rc7xc4
Rb1xb7 Rc4xc2 Rd6xa6
++ h5-f4
00:01 0 0 79020 (20355) 5 -2.275 Nh5-f4 Nc4xd6 Re8-e7 Nd6-b5 Qf6-g5
++ f6-e7
00:01 0 0 113870 (23731) 5 -1.488 Qf6-e7 Nc4xd6 Re8-d8 Nd6-c4 f3xg2 Kg1xg2
++ e8-d8
00:01 0 0 149864 (40480) 5 -0.426 Re8-d8 Rb1-e1 Qf6-g5 g2-g3 Qg5-f6
00:02 0 0 217558 (66175) 6 -0.617 Re8-d8 e4-e5 Qf6-g5 g2-g3 d6xe5 d5-d6
++ h5-f4
00:02 0 0 299405 (106183) 6 -0.409 Nh5-f4 Nc4xd6 Re8-e7 e4-e5 Qf6-g5 g2-g3 Nf4-h
3 Kg1-h1 Qg5xe5
00:06 0 0 704671 (255281) 7 -0.001 Nh5-f4 Nc4xd6 Re8-f8 Nc3-d1 f3xg2 Nd6-f5 Qf6-
e5
00:13 0 0 1607113 (326653) 8 0.001 Nh5-f4 Nc4xd6 Re8-f8 Nd6-f5 Qf6-g5 Nf5-g3 f3x
g2 Nc3-d1
00:41 0 0 4996795 (1141485) 9 0.018 Nh5-f4 Nc4xd6 Re8-f8 Nd6-f5 Qf6-g5 Nf5-g3 f3
xg2 Nc3-e2 Nf4-h3 Kg1xg2 Nh3xf2
02:34 0 0 19165262 (3281211) 10 0.255 Nh5-f4 Nc4xd6 Re8-e7 Nd6-b5 Qf6-g5 g2-g3 N
f4-h3 Kg1-f1 Nc5xe4 Qc2xe4 Re7xe4 Nb5xc7




>Sjeng played Rb6 and lost. How long to see it loses/avoid it?
>Me and Tony were thinking that g3 would lose for white, but it
>does seem to be the best move, and perhaps doesn't lose at all.
>
>The two quotes:
>
>Mathias Feist (he was watching as I analyzed the first position
>with Fritz 7 and Crafty 18.12)
>
>'Crafty can count the material very well'
>
>Johan De Koning:
>
>'Ik wil gewoon mijn konijn op h7 krijgen'
>
>(I just want to get my rabbit on h7)
>
>--
>GCP



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