Author: Eugene Nalimov
Date: 22:05:26 12/28/01
Go up one level in this thread
I did not generated those TBs yet... But here is statistics for KRNNKR: wtm: Lost in 0: 635025 wtm: Lost in 1: 305822 wtm: Lost in 2: 52263 wtm: Lost in 3: 2253 wtm: Lost in 4: 198 wtm: Lost in 5: 11 wtm: Lost in 7: 1 wtm: Lost in 9: 1 wtm: Lost in 13: 8 wtm: Lost in 14: 10 wtm: Lost in 15: 1 wtm: Lost in 16: 21 wtm: Lost in 17: 33 wtm: Lost in 18: 138 wtm: Lost in 19: 134 wtm: Lost in 20: 171 wtm: Lost in 21: 90 wtm: Lost in 22: 42 wtm: Lost in 23: 78 wtm: Lost in 24: 107 wtm: Lost in 25: 161 wtm: Lost in 26: 223 wtm: Lost in 27: 193 wtm: Lost in 28: 154 wtm: Lost in 29: 135 wtm: Lost in 30: 66 wtm: Lost in 31: 54 wtm: Lost in 32: 43 wtm: Lost in 33: 39 wtm: Lost in 34: 29 wtm: Lost in 35: 29 wtm: Lost in 36: 15 wtm: Lost in 37: 9 wtm: Lost in 38: 7 wtm: Lost in 39: 4 wtm: Draws: 118405682 wtm: Mate in 42: 2 wtm: Mate in 41: 44 wtm: Mate in 40: 163 wtm: Mate in 39: 438 wtm: Mate in 38: 1126 wtm: Mate in 37: 2406 wtm: Mate in 36: 4712 wtm: Mate in 35: 10214 wtm: Mate in 34: 19831 wtm: Mate in 33: 40248 wtm: Mate in 32: 80989 wtm: Mate in 31: 155905 wtm: Mate in 30: 326043 wtm: Mate in 29: 732070 wtm: Mate in 28: 1733722 wtm: Mate in 27: 4108218 wtm: Mate in 26: 9274156 wtm: Mate in 25: 19089003 wtm: Mate in 24: 35010520 wtm: Mate in 23: 56512208 wtm: Mate in 22: 79895964 wtm: Mate in 21: 99165290 wtm: Mate in 20: 109540651 wtm: Mate in 19: 109782656 wtm: Mate in 18: 102307213 wtm: Mate in 17: 90323380 wtm: Mate in 16: 76996399 wtm: Mate in 15: 64661555 wtm: Mate in 14: 54833663 wtm: Mate in 13: 51583670 wtm: Mate in 12: 58870935 wtm: Mate in 11: 85400623 wtm: Mate in 10: 141353106 wtm: Mate in 9: 184735933 wtm: Mate in 8: 179832361 wtm: Mate in 7: 143695586 wtm: Mate in 6: 95875216 wtm: Mate in 5: 53840184 wtm: Mate in 4: 23369643 wtm: Mate in 3: 15639317 wtm: Mate in 2: 11167221 wtm: Mate in 1: 13902514 wtm: Broken positions: 447037334 btm: Lost in 0: 2665158 btm: Lost in 1: 1830996 btm: Lost in 2: 1235360 btm: Lost in 3: 1458724 btm: Lost in 4: 2519273 btm: Lost in 5: 5325005 btm: Lost in 6: 10184886 btm: Lost in 7: 17350432 btm: Lost in 8: 27673536 btm: Lost in 9: 38873457 btm: Lost in 10: 41928561 btm: Lost in 11: 35820790 btm: Lost in 12: 31306580 btm: Lost in 13: 30040606 btm: Lost in 14: 35114298 btm: Lost in 15: 44750911 btm: Lost in 16: 57162782 btm: Lost in 17: 71981325 btm: Lost in 18: 87834640 btm: Lost in 19: 102530998 btm: Lost in 20: 112795722 btm: Lost in 21: 114456139 btm: Lost in 22: 103738652 btm: Lost in 23: 81887604 btm: Lost in 24: 55869247 btm: Lost in 25: 32988981 btm: Lost in 26: 16959493 btm: Lost in 27: 7670672 btm: Lost in 28: 3224396 btm: Lost in 29: 1345159 btm: Lost in 30: 599294 btm: Lost in 31: 289784 btm: Lost in 32: 143127 btm: Lost in 33: 66518 btm: Lost in 34: 32920 btm: Lost in 35: 15270 btm: Lost in 36: 6917 btm: Lost in 37: 3285 btm: Lost in 38: 1528 btm: Lost in 39: 425 btm: Lost in 40: 116 btm: Lost in 41: 22 btm: Lost in 42: 3 btm: Draws: 1293094089 btm: Mate in 41: 43 btm: Mate in 40: 228 btm: Mate in 39: 964 btm: Mate in 38: 1437 btm: Mate in 37: 4710 btm: Mate in 36: 8743 btm: Mate in 35: 9723 btm: Mate in 34: 14529 btm: Mate in 33: 18046 btm: Mate in 32: 25308 btm: Mate in 31: 28746 btm: Mate in 30: 40902 btm: Mate in 29: 61049 btm: Mate in 28: 71580 btm: Mate in 27: 77772 btm: Mate in 26: 79650 btm: Mate in 25: 88874 btm: Mate in 24: 91360 btm: Mate in 23: 84030 btm: Mate in 22: 70021 btm: Mate in 21: 66770 btm: Mate in 20: 74687 btm: Mate in 19: 103615 btm: Mate in 18: 101279 btm: Mate in 17: 59647 btm: Mate in 16: 24745 btm: Mate in 15: 15128 btm: Mate in 14: 10292 btm: Mate in 13: 6367 btm: Mate in 12: 2979 btm: Mate in 11: 2025 btm: Mate in 10: 1836 btm: Mate in 9: 1536 btm: Mate in 8: 3452 btm: Mate in 7: 2363 btm: Mate in 6: 5286 btm: Mate in 5: 11600 btm: Mate in 4: 39398 btm: Mate in 3: 322779 btm: Mate in 2: 1951027 btm: Mate in 1: 4493961 btm: Broken positions: 438220752 Will move KBNNKQ, KBNNKR, and KNNNKR higher in my "TODO" list. Eugene On December 28, 2001 at 13:32:46, Bruce Moreland wrote: >On December 28, 2001 at 08:51:30, Mike Hood wrote: > >>On December 27, 2001 at 22:30:26, Dann Corbit wrote: >> >>>On December 27, 2001 at 22:25:20, Gogi Cviak wrote: >>> >>>>Guys, if u know a programmer, let me know, somebody who knows chess and >>>>checkers, this is strictly for fun, no sales! >>> >>>There are dozens of programmers who post here. >>> >>>>can 3 knights beat a rook, >>> >>>Yes. And no. Depends on the position. >>> >>>>can 2 knights and a bishop win against a rook, >>> >>>Yes. And no. Depends on the position. >>> >>>>what do the databases say? >>> >>>Try a lookup and see. There is an online version of the Nalimov tables that you >>>can query to your heart's content. >> >>I'm not aware that there's a KBNN-KR tablebase available, or in fact any 6 piece >>tablebases for Kxxx-Kx. I would be more interested in KBNN-KQ, if anyone has a >>computer powerful enough to generate it. >> >>A general question is... are there any 6-piece tablebases available anywhere >>apart from Bob Hyatt's server? > >KBNN vs KQ has to be drawn: > >1) The queen isn't going to beat the pieces, since there are lots of pieces. >2) The pieces aren't going to beat the queen, since QxB is a draw. > >KBNN vs KR is interesting to think about. > >1) RxB is drawn, but ... >2) ... RB vs R is almost won, and that's one "point" less. Of course, RxB is >*not* draw in that case. > >If it is won, I bet it is *extremely* difficult. I'd bet on drawn. > >KNNN vs KR can't possibly be a win for the knights, since RxN is drawn, and >there are three of them to threaten. In KBN vs KRR, "all" you have to do to win >is win an exchange with a knight while preserving your bishop, but in this one >you have to win a whole rook while preserving everything. > >Interesting questions. > >bruce
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