Author: Robert Hyatt
Date: 10:13:56 10/15/03
Go up one level in this thread
On October 15, 2003 at 12:37:43, Michel Langeveld wrote:
>[D]8/k7/3p4/p2P1p2/P2P1P2/8/8/K7 w - -
>
>This position really bothers me ... and bothers nullmover...
>nullmover takes a really long time to see that the pawn can be really won.
>
>At ply 23 we see the keymove Kb1, but it needs 26 ply after 6 minutes we see
>that Kb1 wins a true pawn.
>
>The hashhit percentage is only 3%.
That is a problem right there. Run this on Crafty and check the hit
percentage.
26 plies is what you need to see this wins a pawn, but the hash table
generally makes you see it quicker...
>The FH is only 30%
>
>Do I have to be worried ... or is this still all normal?
>
>search 26
>search on ply: 1 [-9999,9999]
> 1 132 0 2 1.Kb2
>*1 132 0 4 1.Kb2
>search on ply: 2 [107,157]
> 2 119 0 10 1.Kb2 Kb6
>*2 119 0 14 1.Kb2 Kb6
>search on ply: 3 [94,144]
> 3 129 0 32 1.Kb2 Kb6 2.Kc3
>*3 129 0 46 1.Kb2 Kb6 2.Kc3
>search on ply: 4 [104,154]
> 4 129 0 93 1.Kb2 Kb6 2.Kc3 Kc7
>*4 129 0 108 1.Kb2 Kb6 2.Kc3 Kc7
>search on ply: 5 [104,154]
> 5 132 0 203 1.Kb2 Kb6 2.Kc3 Kc7 3.Kc4
>*5 132 2 226 1.Kb2 Kb6 2.Kc3 Kc7 3.Kc4 {15067}
>search on ply: 6 [107,157]
> 6 130 2 371 1.Kb2 Kb6 2.Kc3 Kc7 3.Kc4 Kd7 {24733}
>*6 130 2 394 1.Kb2 Kb6 2.Kc3 Kc7 3.Kc4 Kd7 {26267}
>search on ply: 7 [105,155]
> 7 130 2 620 1.Kb2 Kb6 2.Kc3 Kc7 3.Kc4 Kd7 4.Kd3 {41333}
>*7 130 2 643 1.Kb2 Kb6 2.Kc3 Kc7 3.Kc4 Kd7 4.Kd3 {42867}
>search on ply: 8 [105,155]
> 8 132 2 962 1.Kb2 Kb6 2.Kc3 Kc7 3.Kc4 Kb6 4.Kd3 Kc7 {64133}
>*8 132 2 985 1.Kb2 Kb6 2.Kc3 Kc7 3.Kc4 Kb6 4.Kd3 Kc7 {65667}
>search on ply: 9 [107,157]
> 9 132 2 1385 1.Kb2 Kb6 2.Kc3 Kc7 3.Kc4 Kb6 4.Kd3 Kc7 5.Ke3 {92333}
>*9 132 2 1408 1.Kb2 Kb6 2.Kc3 Kc7 3.Kc4 Kb6 4.Kd3 Kc7 5.Ke3 {93867}
>search on ply: 10 [107,157]
> 10 130 3 3076 1.Kb2 Kb8 2.Kc3 Kb7 {99226}
>*10 130 3 3209 1.Kb2 Kb8 2.Kc3 Kb7 {103516}
>search on ply: 11 [105,155]
> 11 130 3 3914 1.Kb2 Kb8 2.Kc3 Kb7 3.Kc4 Kb6 4.Kd3 Kc7 5.Ke3 Kd7 6.Kd3 {1
>26258}
>*11 130 3 3944 1.Kb2 Kb8 2.Kc3 Kb7 3.Kc4 Kb6 4.Kd3 Kc7 5.Ke3 Kd7 6.Kd3 {1
>27226}
>search on ply: 12 [105,155]
> 12 130 5 6461 1.Kb2 Kb8 2.Kc3 Kb7 3.Kc4 Kb6 4.Kd3 Kc7 5.Kd2 Kd7 6.Ke3 Ke
>7 {137468}
>*12 130 5 6491 1.Kb2 Kb8 2.Kc3 Kb7 3.Kc4 Kb6 4.Kd3 Kc7 5.Kd2 Kd7 6.Ke3 Ke
>7 {138106}
>search on ply: 13 [105,155]
> 13 130 5 8448 1.Kb2 Kb8 2.Kc3 Kb7 3.Kc4 Kb6 4.Kd3 Kc7 5.Ke3 Kd7 6.Kd2 Ke
>7 7.Kd3 {179745}
>*13 130 5 8478 1.Kb2 Kb8 2.Kc3 Kb7 3.Kc4 Kb6 4.Kd3 Kc7 5.Ke3 Kd7 6.Kd2 Ke
>7 7.Kd3 {180383}
>search on ply: 14 [105,155]
> 14 130 5 10083 1.Kb2 Kb8 2.Kc3 Kb7 3.Kc4 Kb6 4.Kd3 Kc7 5.Kd2 Kc8 6.Ke2 K
>d7 7.Ke3 Ke7 {214532}
>*14 130 6 10113 1.Kb2 Kb8 2.Kc3 Kb7 3.Kc4 Kb6 4.Kd3 Kc7 5.Kd2 Kc8 6.Ke2 K
>d7 7.Ke3 Ke7 {163113}
>search on ply: 15 [105,155]
> 15 130 6 12081 1.Kb2 Kb8 2.Kc3 Kb7 3.Kc4 Kb6 4.Kd3 Kc7 5.Ke3 Kd8 6.Kd2 K
>c8 7.Ke2 Kd7 8.Ke3 {194855}
>*15 130 6 12111 1.Kb2 Kb8 2.Kc3 Kb7 3.Kc4 Kb6 4.Kd3 Kc7 5.Ke3 Kd8 6.Kd2 K
>c8 7.Ke2 Kd7 8.Ke3 {195339}
>search on ply: 16 [105,155]
> 16 130 6 14610 1.Kb2 Kb8 2.Kc3 Kb7 3.Kc4 Kb6 4.Kd3 Kc7 5.Ke3 Kd7 6.Kf3 K
>e7 7.Ke2 Kd7 8.Ke3 Kd8 {235645}
>*16 130 6 14640 1.Kb2 Kb8 2.Kc3 Kb7 3.Kc4 Kb6 4.Kd3 Kc7 5.Ke3 Kd7 6.Kf3 K
>e7 7.Ke2 Kd7 8.Ke3 Kd8 {236129}
>search on ply: 17 [105,155]
> 17 131 8 20601 1.Kb2 Kb8 2.Kc3 Kb7 3.Kc4 Kb6 4.Kd3 Kc7 5.Ke3 Kd7 6.Ke2 K
>c8 7.Kd2 Kd7 {264115}
>*17 131 8 20631 1.Kb2 Kb8 2.Kc3 Kb7 3.Kc4 Kb6 4.Kd3 Kc7 5.Ke3 Kd7 6.Ke2 K
>c8 7.Kd2 Kd7 {264500}
>search on ply: 18 [106,156]
> 18 131 69 491283 1.Kb2 Ka8 2.Kc2 Kb8 3.Kd1 Kc7 4.Kc2 {715114}
>*18 131 70 492200 1.Kb2 Ka8 2.Kc2 Kb8 3.Kd1 Kc7 4.Kc2 {700142}
>search on ply: 19 [106,156]
> 19 131 70 493817 1.Kb2 Ka8 2.Kc2 Kb8 3.Kd1 Kc7 4.Kc2 {702442}
>*19 131 88 623316 1.Kb2 Ka8 2.Kc2 Kb8 3.Kd1 Kc7 4.Kc2 {712361}
>search on ply: 20 [106,156]
> 20 131 92 650421 1.Kb2 Ka8 2.Kc2 Kb8 3.Kd1 Kc7 4.Kd2 Kc8 5.Kc1 Kb7 6.Kb1
> Ka7 7.Ka2 Kb6 {705446}
>*20 131 94 651389 1.Kb2 Ka8 2.Kc2 Kb8 3.Kd1 Kc7 4.Kd2 Kc8 5.Kc1 Kb7 6.Kb1
> Ka7 7.Ka2 Kb6 {695186}
>search on ply: 21 [106,156]
> 21 132 370 2833976 1.Kb2 Ka8 2.Kc2 Kb8 3.Kd1 Kc7 4.Kd2 Kc8 5.Ke3 Kd7 6.K
>e2 Ke7 7.Kd3 Kf6 8.Kc3 Kg6 9.Kc4 Kh5 10.Kd3 Kg6 11.Ke3 {765319}
>*21 132 370 2835288 1.Kb2 Ka8 2.Kc2 Kb8 3.Kd1 Kc7 4.Kd2 Kc8 5.Ke3 Kd7 6.K
>e2 Ke7 7.Kd3 Kf6 8.Kc3 Kg6 9.Kc4 Kh5 10.Kd3 Kg6 11.Ke3 {765673}
>search on ply: 22 [107,157]
> 22 131 1528 10731444 1.Kb2 Ka8 2.Kc2 Kb8 3.Kd1 Kc7 4.Ke2 Kd7 5.Kd3 Kc7 6
>.Kd2 Kc8 7.Kc1 Kb7 8.Kb1 Ka7 {702274}
>*22 131 1589 11142517 1.Kb2 Ka8 2.Kc2 Kb8 3.Kd1 Kc7 4.Ke2 Kd7 5.Kd3 Kc7 6
>.Kd2 Kc8 7.Kc1 Kb7 8.Kb1 Ka7 {701184}
>search on ply: 23 [106,156]
> 23 131 1591 11152360 1.Kb2 Ka8 2.Kc2 Kb8 3.Kd1 Kc7 4.Ke2 Kd7 5.Kd3 Kc7 6
>.Ke3 Kd7 7.Kd2 Kc8 8.Kc1 Kd7 9.Kb1 Ke7 10.Kc2 Kf6 11.Kd3 Kf7 12.Kc4 {701142}
> 23 156 7292 54938121 1.Kb1 Kb7 2.Kc1 Kc7 3.Kd1 Kd7 4.Kc2 Ke7 5.Kd3 Kf6 6
>.Kc4 Kg6 7.Kb5 Kh5 8.Kxa5 Kg4 9.Kb5 Kxf4 10.a5 Ke4 11.a6 Kxd4 12.a7 Kxd5 {753372
>}
>*22 ++ 7292 54938121 1.Kb1 Kb7 2.Kc1 Kc7 3.Kd1 Kd7 4.Kc2 Ke7 5.Kd3 Kf6 6.
>Kc4 Kg6 7.Kb5 Kh5 8.Kxa5 Kg4 9.Kb5 Kxf4 10.a5 Ke4 11.a6 Kxd4 12.a7 Kxd5 {753372}
>
>search on ply: 23 [-9999,9999]
> 23 156 7720 58048005 1.Kb1 Kb7 2.Kc1 Kc7 3.Kd1 Kd7 4.Kc2 Kd8 5.Kc3 Kc7 6
>.Kd3 Kb6 7.Ke3 Kc7 {751878}
>*23 156 7722 58048007 1.Kb1 Kb7 2.Kc1 Kc7 3.Kd1 Kd7 4.Kc2 Kd8 5.Kc3 Kc7 6
>.Kd3 Kb6 7.Ke3 Kc7 {751732}
>search on ply: 24 [131,181]
> 24 155 10080 77980330 1.Kb1 Kb7 2.Kc1 Kc7 3.Kd1 Kd7 4.Kc2 Kc8 5.Kd2 Kd7
>6.Kc3 Kc7 7.Kd3 Kb6 8.Ke3 Kc7 9.Kf2 Kd7 10.Kg3 Ke7 11.Kh4 Kf6 12.Kh5 Ke7 {773630
>}
>*24 155 10080 77980415 1.Kb1 Kb7 2.Kc1 Kc7 3.Kd1 Kd7 4.Kc2 Kc8 5.Kd2 Kd7
>6.Kc3 Kc7 7.Kd3 Kb6 8.Ke3 Kc7 9.Kf2 Kd7 10.Kg3 Ke7 11.Kh4 Kf6 12.Kh5 Ke7 {773631
>}
>search on ply: 25 [130,180]
> 25 138 10650 82526232 1.Kb1 Kb7 2.Kc1 Kc7 3.Kd1 Kd7 4.Kc2 Kc8 5.Kd2 Kd7
>6.Kc3 Kc7 7.Kd3 Kb7 8.Ke3 Kc8 9.Kf3 Kd7 10.Ke2 Kd8 11.Kd3 Kc7 12.Kc3 Kb7 13.Kc4
>{774887}
>*25 138 10652 82526450 1.Kb1 Kb7 2.Kc1 Kc7 3.Kd1 Kd7 4.Kc2 Kc8 5.Kd2 Kd7
>6.Kc3 Kc7 7.Kd3 Kb7 8.Ke3 Kc8 9.Kf3 Kd7 10.Ke2 Kd8 11.Kd3 Kc7 12.Kc3 Kb7 13.Kc4
>{774773}
>search on ply: 26 [113,163]
> 26 163 24202 206044430 1.Kb1 Kb7 2.Kc1 Kc7 3.Kd1 Kd7 4.Kc2 Kc8 5.Kd2 Kd7
> 6.Kc3 Ke7 7.Kc4 Kf6 8.Kb5 Ke7 9.Kxa5 Kf6 10.Kb5 Ke7 11.a5 Kf6 12.a6 Ke7 13.a7 K
>f6 14.a8Q {851360}
>*25 ++ 24202 206044430 1.Kb1 Kb7 2.Kc1 Kc7 3.Kd1 Kd7 4.Kc2 Kc8 5.Kd2 Kd7
>6.Kc3 Ke7 7.Kc4 Kf6 8.Kb5 Ke7 9.Kxa5 Kf6 10.Kb5 Ke7 11.a5 Kf6 12.a6 Ke7 13.a7 Kf
>6 14.a8Q {851360}
>search on ply: 26 [-9999,9999]
> 26 235 37724 339058904 1.Kb1 Kb7 2.Kc1 Kc7 3.Kd1 Kd7 4.Kc2 Kc8 5.Kd2 Kd7
> 6.Kc3 Kc7 7.Kd3 Kb6 8.Ke3 Kb7 9.Kf3 Kc7 10.Kg3 Kd7 11.Kh4 Ke7 12.Kg5 Kf7 13.Kxf
>5 Ke7 {898791}
>*26 235 37724 339058989 1.Kb1 Kb7 2.Kc1 Kc7 3.Kd1 Kd7 4.Kc2 Kc8 5.Kd2 Kd7
> 6.Kc3 Kc7 7.Kd3 Kb6 8.Ke3 Kb7 9.Kf3 Kc7 10.Kg3 Kd7 11.Kh4 Ke7 12.Kg5 Kf7 13.Kxf
>5 Ke7 {898791}
>Bestline:1.Kb1 Kb7 2.Kc1 Kc7 3.Kd1 Kd7 4.Kc2 Kc8 5.Kd2 Kd7 6.Kc3 Kc7 7.Kd3 Kb6 8
>.Ke3 Kb7 9.Kf3 Kc7 10.Kg3 Kd7 11.Kh4 Ke7 12.Kg5 Kf7 13.Kxf5 Ke7
>
>score: 235
>depth: 26
>time: 377.24
>nodes: 339058989
>nps: 898791
>beta-cut-off's on first move: 64124811
>beta-cut-off's: 68353423
>FH: 30.00
>qnodes: 1759034
>qnodesperc: 2.75%
>evals: 112624433
>nullmoveCutOff: 60184006
>movesmade: 456875998
>checksextensions: 18226420
>hashprobes: 448898890
>hashhits: 230044876
>hashhitperc: 3.00%
>hashstores: 41258
>pawnhashprobes: 14406747
>pawnhashhits: 14406619
>pawnhashhitperc: 99.00
>pawnhashstores: 128
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