Author: Stuart Cracraft
Date: 16:49:10 01/14/98
Go up one level in this thread
On January 14, 1998 at 18:24:54, Vincent Lejeune wrote: >On January 14, 1998 at 18:07:45, Stuart Cracraft wrote: > >>On January 14, 1998 at 16:53:06, Vincent Lejeune wrote: >> >>>I've red a book chess problem, and find the following position : >>> >>>[Event "?"] >>>[Site "?"] >>>[Date "??.??.????"] >>>[Round "?"] >>>[White "W"] >>>[Black "B"] >>>[Result "*"] >>>[WhiteElo "?"] >>>[BlackElo "?"] >>>[FEN "8/7p/6pP/k4pP1/b1p1pP2/KpPpP3/1P1P4/7Q w - - 0 1"] >>> >>> >>>and the book say : >>> >>>If it's white to moves, black are in zugzwang because after : >>>1.Qd1 B moves 2.Qxc3 cxb3 3.Kxd3 , the 2 passed pawn win for white !!! >>>I don't understand everything in the position (and I don't blame who >>>don't understand like me ;) ). >>> >>>I look for someone who can analyse this position with a strong chess >>>program... >>> >> >>Well, don't know about the "strong", but here's my program's analysis. >> >>K2 1/13/98 0.19 >>Type ? for help. >>Transposition table: Entries=100K Size=6400K >>Pawn transposition table: Entries=31K Size=2000K >>? set time 60 >>? test solve ../tests/testone.ci >>60 seconds per problem. >>lejeune >>Qd1 >> >>white >>. . . . . . . . >>. . . . . . . p >>. . . . . . p P >>k . . . . p P . >>b . p . p P . . >>K p P p P . . . >>. P . P . . . . >>. . . . . . . Q >> >>Phase = Middlegame, Target search time = 60 sec, Root score = 442 >> 1+ 0.0 697 3 Qh4 >> 1. 0.0 603 17 Qh4 >> 2- 0.1 431 56 Qh4 >> 2& 0.1 426 64 Qh4 Kb5 >> 2& 0.1 427 78 Qc1 Kb5 >> 2. 0.1 431 86 Qd1 Kb5 >> 3+ 0.1 697 161 Qd1 >> 3. 0.1 603 202 Qd1 Kb5 Qa1 >> 4- 0.1 446 266 Qd1 >> 4. 0.1 446 311 Qd1 Kb5 Qe1 Ka5 >> 5+ 0.1 697 531 Qd1 >> 5. 0.1 603 706 Qd1 Kb5 Qe1 Ka5 Qa1 Kb5 >> 6- 0.1 431 915 Qd1 >> 6& 0.1 430 1160 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 >> 6. 0.1 430 1414 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qe1 Kb5 >>Qa1 >> 7& 0.2 430 1699 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qe1 Kb5 >>Qa1 >> 7. 0.2 430 1942 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qe1 Kb5 >>Qa1 >> 8& 0.2 434 2571 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qf1 >> 8. 0.2 434 2884 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qf1 >> 9& 0.2 434 3271 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qf1 >> 9. 0.2 434 3688 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qf1 >>10& 0.3 430 4817 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qe1 Kb5 >>Qa1 >>10. 0.4 430 11420 Qd1 Kb5 Qe1 Ka5 Qf1 Kb5 Qa1 Ka5 Qe1 Kb5 >>Qa1 >>11+ 0.9 507 27335 Qd1 >>11. 1.0 503 30122 Qd1 Kb5 Qf1 Ka5 Qh1 Kb5 Qa1 Ka5 Qh1 >>12- 2.2 427 70920 Qd1 >>12& 2.3 425 72688 Qd1 Bb5 Qa1 Ba6 Qf1 Kb5 Qe1 Ka5 Qa1 Kb5 >>Qb1 >> Ka5 Qa1 >>12. 2.3 425 72756 Qd1 Bb5 Qa1 Ba6 Qf1 Kb5 Qe1 Ka5 Qa1 Kb5 >>Qb1 >> Ka5 Qa1 >>13& 2.8 430 92382 Qd1 Bb5 Qa1 Be8 Qe1 Ba4 Qf1 Bb5 Qe1 Be8 >>Qa1 >> Bd7 Qe1 Bb5 Qa1 >>13. 2.9 430 98266 Qd1 Bb5 Qa1 Be8 Qe1 Ba4 Qf1 Bb5 Qe1 Be8 >>Qa1 >> Bd7 Qe1 Bb5 Qa1 >>14& 3.4 430 116144 Qd1 Bb5 Qa1 Be8 Qe1 Bb5 Qf1 Be8 Qa1 Bd7 >>Qe1 >> Bb5 Qf1 Be8 Qa1 Bd7 Qe1 Bb5 >>14. 6.6 430 214074 Qd1 Bb5 Qa1 Be8 Qe1 Bb5 Qf1 Be8 Qa1 Bd7 >>Qe1 >> Bb5 Qf1 Be8 Qa1 Bd7 Qe1 Bb5 >>15& 8.2 430 277129 Qd1 Bb5 Qa1 Be8 Qe1 Bb5 Qf1 Be8 Qa1 Bd7 >>Qe1 >> Bb5 Qf1 Be8 Qa1 Bd7 Qe1 Be8 Qa1 >>15. 19.7 430 710557 Qd1 Bb5 Qa1 Be8 Qe1 Bb5 Qf1 Be8 Qa1 Bd7 >>Qe1 >> Bb5 Qf1 Be8 Qa1 Bd7 Qe1 Be8 Qa1 >>16& 23.8 430 855943 Qd1 Bb5 Qa1 Ba4 Qh1 Be8 Qf1 Bd7 Qe1 Be8 >>Qb1 >> Bb5 Qa1 Ba4 Qh1 >>16. 41.3 430 1430961 Qd1 Bb5 Qa1 Ba4 Qh1 Be8 Qf1 Bd7 Qe1 Be8 >>Qb1 >> Bb5 Qa1 Ba4 Qh1 Bb5 Qa1 >>17& 49.1 430 1722280 Qd1 Bd7 Qa1 Ba4 Qb1 Bb5 Qe1 Bd7 Qa1 Ba4 >>Qb1 >> Bb5 >>17. 54.6 430 1930188 Qd1 Bd7 Qa1 Ba4 Qb1 Bb5 Qe1 Bd7 Qa1 Ba4 >>Qb1 >> Bb5 Qa1 Be8 Qb1 Bb5 >>18. 60.0 430 2144013 Qd1 Bd7 Qa1 Ba4 Qb1 Bb5 Qe1 Bd7 Qa1 Ba4 >>Qb1 >> Bb5 Qa1 Be8 Qb1 Bb5 >> >>My move is : Qd1 >>Time = 60.0 Rate=35730 Nodes=[1536201/607812/2144013] >>Eval=431520 RptCnt=11112 NullCut=100569 >>Extensions: Check=151557 Recapture=15205 Pawn=135 OneMove=0 >> Threat=0 DeepSearch=0 Mate=0 >>Material=[1600/1000] Worst=[-1080/97] >>Hash: Success=26% Collision=66% >>Hash Counts: ReadHits=446157, ReadProbes=1658921, WriteColl=326019, >>WriteTries=493572 >>Pawn Hash: Success=98% Collision=12% >>Pawn Counts: ReadHits=853541, ReadProbes=862338, WriteColl=1095, >>WriteTries=8797 >> >>black >>. . . . . . . . >>. . . . . . . p >>. . . . . . p P >>k . . . . p P . >>b . p . p P . . >>K p P p P . . . >>. P . P . . . . >>. . . Q . . . . >> >>+++ Qd1 Qd1 >> >>Correct so far: 1 Total problems: 1 Percent: 100% >> >>********* Grand totals ********** >>Time = 60.0 Rate=35730 Nodes=[1536201/607812/2144013] >>EvalCnt=431520 RptCnt=11112 NullCut=100569 >>Extensions: Check=151557 Recapture=15205 Pawn=135 OneMove=0 >> Threat=0 DeepSearch=0 Mate=0 >>Hash: Success=26% Collision=66% >>Pawn Hash: Success=98% Collision=12% > > >So your program don't make any progress in the position !? Nothing that involves a queen sacrifice in 60 seconds. However, funny that you should send that. I am adding some passed pawn logic tonight and we'll see if that helps. --Stuart
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