Author: Uri Blass
Date: 23:36:41 02/01/05
Go up one level in this thread
On February 02, 2005 at 02:09:12, Tony Werten wrote: >On February 01, 2005 at 19:03:35, Uri Blass wrote: > >>On February 01, 2005 at 16:58:27, Uri Blass wrote: >> >>>I find in Hyatt sites some information like >>> >>>ftp://ftp.cis.uab.edu/pub/hyatt/TB/tbs/kbppkn.tbs >>> >>>Unfortunately I am interested in statistics about 3 and 4 piece tablebases. >>> >>>Where can I find similiar statistics about 3 and 4 piece tablebases? >>>I plan to write a program to calculate them directly from the tablebases but I >>>do not trust my calculation to be correct. >> >> >>Here is some statistics about kpk(white with the pawn). >>I hope no errors. >> >> >>pawn to move >> >>49468 draws >>80 mates in 1 >>226 mates in 2 >>502 mates in 3 >>876 mates in 4 >>2036 mates in 5 >>3874 mates in 6 >>7784 mates in 7 >>15572 mates in 8 >>23392 mates in 9 >>26872 mates in 10 >>27182 mates in 11 >>23010 mates in 12 >>15240 mates in 13 >>8054 mates in 14 >>2146 mates in 15 >>2324 mates in 16 >>2164 mates in 17 >>1742 mates in 18 >>1316 mates in 19 >>1116 mates in 20 >>1212 mates in 21 >>1124 mates in 22 >>686 mates in 23 >>288 mates in 24 >>128 mates in 25 >>38 mates in 26 >>14 mates in 27 >>6 mates in 28 >> >> >>black to move >> >>101156 draws >>0 mates >>18 mate in 1 >>46 mate in 2 >>128 mate in 3 >>306 mate in 4 >>664 mate in 5 >>1654 mate in 6 >>4328 mate in 7 >>8692 mate in 8 >>15712 mate in 9 >>19026 mate in 10 >>25028 mate in 11 >>17378 mate in 12 >>10180 mate in 13 >>5520 mate in 14 >>2826 mate in 15 >>2952 mate in 16 >>1916 mate in 17 >>1422 mate in 18 >>1194 mate in 19 >>872 mate in 20 >>1162 mate in 21 >>860 mate in 22 >>584 mate in 23 >>218 mate in 24 >>62 mate in 25 >>28 mate in 26 >>8 mate in 27 >>4 mate in 28 > >wtm: Draws: 19184 >wtm: Mate in 28: 3 >wtm: Mate in 27: 7 >wtm: Mate in 26: 19 >wtm: Mate in 25: 64 >wtm: Mate in 24: 144 >wtm: Mate in 23: 343 >wtm: Mate in 22: 562 >wtm: Mate in 21: 606 >wtm: Mate in 20: 558 >wtm: Mate in 19: 658 >wtm: Mate in 18: 871 >wtm: Mate in 17: 1066 >wtm: Mate in 16: 1154 >wtm: Mate in 15: 1065 >wtm: Mate in 14: 3829 >wtm: Mate in 13: 6719 >wtm: Mate in 12: 8178 >wtm: Mate in 11: 8601 >wtm: Mate in 10: 8395 >wtm: Mate in 9: 7541 >wtm: Mate in 8: 5647 >wtm: Mate in 7: 3121 >wtm: Mate in 6: 1636 >wtm: Mate in 5: 915 >wtm: Mate in 4: 422 >wtm: Mate in 3: 219 >wtm: Mate in 2: 97 >wtm: Mate in 1: 40 >btm: Lost in 1: 9 >btm: Lost in 2: 23 >btm: Lost in 3: 64 >btm: Lost in 4: 153 >btm: Lost in 5: 332 >btm: Lost in 6: 812 >btm: Lost in 7: 2089 >btm: Lost in 8: 4226 >btm: Lost in 9: 7180 >btm: Lost in 10: 7857 >btm: Lost in 11: 7215 >btm: Lost in 12: 5843 >btm: Lost in 13: 4185 >btm: Lost in 14: 2501 >btm: Lost in 15: 1026 >btm: Lost in 16: 1194 >btm: Lost in 17: 902 >btm: Lost in 18: 711 >btm: Lost in 19: 597 >btm: Lost in 20: 436 >btm: Lost in 21: 565 >btm: Lost in 22: 430 >btm: Lost in 23: 292 >btm: Lost in 24: 109 >btm: Lost in 25: 31 >btm: Lost in 26: 14 >btm: Lost in 27: 4 >btm: Lost in 28: 2 >btm: Draws: 35210 > >Tony Thanks I see that your number consider symmetric positions as equal. I verified that my number for mate in 28 and loss in 28 were correct I see that I had a bug in my program and it also calculated cases when the pawn is on the first or the last rank. After changing movei not to consider these cases(in games it will get only legal positions so it does not need to consider errors except not having the tablebases) that will never happen in the search and consider only pawn in a-d file I can verify your numbers. Uri
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