Author: leonid
Date: 16:05:03 03/03/01
Go up one level in this thread
On March 03, 2001 at 15:37:58, Tim Foden wrote: >On March 03, 2001 at 08:41:46, leonid wrote: > >>Hi! >> >>If you hate solving too easy mate, then this is for you. Actual position contain >>slight challenge but still is completely reachable. >> >>[D]Q3q2Q/3nbn1B/1QqrkrbQ/3nqn1q/QNq1Q1qN/2B1q2Q/3Q3Q/1K2RR2 w - - >> >>Please, indicate your result. >> >>Don't forget name your program and hardware. >> > >Green Light Chess 2.13, Duron 920MHz, 48Mb hash, finds a mate in 11 after 1 min >43 seconds, but upgrades this to a mate in 10 after 8 mins 10 seconds. > >Cheers, Tim. Thanks, Tim! Probably this position is a mate in 10, at least nobody came for much shorter mate. Mine found mate in 10 moves and I went only as far as 8 moves by brute force. For 9 moves I expected that it will take too long time to verify 100%. Cheers, Leonid. >Analysis below: > >>hash 48 > Hash table size set to: 48.0MB >>anal > Game stage: Opening > Current eval: 13.03 > Ply Time Score Nodes Principal Variation > 1 0.04 19.48 9014 Qh3xe3 > > 2 0.19 -- 40744 Qh3xe3 (a=18.98 b=19.98 e=18.98) > 2 0.31 12.96 71244 Qh3xe3 Qgxe4+ Qxe4 Nxc3+ Qxc3 Qexe4+ Qhc2 > 2 0.60 16.54 155378 Qhxe5+ Ndxe5 Qdxd5+ Q4xd5 Rxe3 > 2 0.67 16.54 176932 Qhxe5+ Ndxe5 Qdxd5+ Q4xd5 Rxe3 > 3 1.48 16.52 445475 Qhxe5+ Ndxe5 Qdxd5+ Q4xd5 Qc8+ Qed7 Qhxg4 > 3 1.90 16.52 604385 Qhxe5+ Ndxe5 Qdxd5+ Q4xd5 Qc8+ Qed7 Qhxg4 > 4 4.02 16.80 1485148 Qhxe5+ Ndxe5 Qdxd5+ Q4xd5 Qxf6+ Bxf6 Qxe8+ Qxe8 > Qxe8+ Ne7 Rxf6+ Kxf6 Nxd5+ Nxd5 > 4 7.16 16.80 2714358 Qhxe5+ Ndxe5 Qdxd5+ Q4xd5 Qxf6+ Bxf6 Qxe8+ Qxe8 > Qxe8+ Ne7 Rxf6+ Kxf6 Nxd5+ Nxd5 > 5 8.38 ++ 3144853 Qhxe5+ (a=16.30 b=17.30 e=17.30) > 5 28.52 26.74 12823k Qhxe5+ Nfxe5 Bg8+ Qf7 Bxf7+ Rxf7 Qhxe5+ Nxe5 Qxe5+ > Qxe5 Rxe5+ Kd7 Qba7+ Nc7 > 5 33.61 26.74 15667k Qhxe5+ Nfxe5 Bg8+ Qf7 Bxf7+ Rxf7 Qhxe5+ Nxe5 Qxe5+ > Qxe5 Rxe5+ Kd7 Qba7+ Nc7 > 6 33.70 ++ 15698k Qhxe5+ (a=26.24 b=27.24 e=27.24) > 6 1:43 320.79 60997k Qhxe5+ Nfxe5 Bg8+ Qxg8 Qaxg8+ Bf7 Qdxd5+ Q4xd5 Qxd5+ > Rxd5 Qaxc6+ Nxc6 Qxc6+ Rd6 Q3xe3+ Nxe3 Rxf6+ Bxf6 > Q6xf6+ Nxf6 Qxf6# <ht> > 6 2:25 320.79 91828k Qhxe5+ Nfxe5 Bg8+ Qxg8 Qaxg8+ Bf7 Qdxd5+ Q4xd5 Qxd5+ > Rxd5 Qaxc6+ Nxc6 Qxc6+ Rd6 Q3xe3+ Nxe3 Rxf6+ Bxf6 > Q6xf6+ Nxf6 Qxf6# <ht> > 7 8:10 320.81 367688k Qhxe5+ Nfxe5 Bg8+ Qxg8 Qaxg8+ Bf7 Qxe5+ Qxe5 Rxe5+ > Nxe5 Qc8+ Rd7 Qaxc6+ Nxc6 Qxd5+ Qxd5 Q6xf6+ Bxf6 > Qxf6# <ht> > 7 21:48 320.81 1007m Qhxe5+ Nfxe5 Bg8+ Qxg8 Qaxg8+ Bf7 Qxe5+ Qxe5 Rxe5+ > Nxe5 Qc8+ Rd7 Qaxc6+ Nxc6 Qxd5+ Qxd5 Q6xf6+ Bxf6 > Qxf6# <ht> > 8 1:06:21 320.81 3441m Qhxe5+ Nfxe5 Bg8+ Qxg8 Qaxg8+ Bf7 Qxe5+ Qxe5 Rxe5+ > Nxe5 Qc8+ Rd7 Qaxc6+ Nxc6 Qxd5+ Qxd5 Q8xf6+ Bxf6 > Qxf6# <ht> > 8 2:59:09 320.81 9384m Qhxe5+ Nfxe5 Bg8+ Qxg8 Qaxg8+ Bf7 Qxe5+ Qxe5 Rxe5+ > Nxe5 Qc8+ Rd7 Qaxc6+ Nxc6 Qxd5+ Qxd5 Q8xf6+ Bxf6 > Qxf6# <ht> > 9 3:08:21 0/112 Qhxe5+ >exit > local: t=3:08:30 nps=877293.2 n=9923005308 (f=1666995293 q=8256010015) > total: t=3:08:30 nps=877293.2 n=9923005308 draws=556631 > trans: probes=760349322 hits=48165193 (6.33%) draft=39916299 (5.25%) > tcuts: exact=269 (0.00%) upper=29606530 (3.89%) lower=9691285 (1.27%) > tstor: exact=988 (0.00%) upper=466118778 (76.31%) lower=144735166 (23.69%) > ext: check=1379702197 recap=31909277 ppush=0 1rep=25714662 thrt=0 > q-moves: gen=74797147 tested=12087705 made/un=5482727 max-dep=9 > max eval diff: part-1=2.00 part-2=1.60
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