Author: Rob Basham
Date: 10:00:10 04/11/05
Go up one level in this thread
On April 11, 2005 at 12:24:18, John Merlino wrote: >On April 11, 2005 at 09:05:39, chandler yergin wrote: > >>On April 11, 2005 at 05:41:59, pavel wrote: >> >>>On April 10, 2005 at 20:52:17, John Merlino wrote: >>> >>>>On April 10, 2005 at 19:55:40, Rob Basham wrote: >>>> >>>>>[D]2r1r2k/4R1pp/pb6/1p6/2nqN1QB/P5PP/1PB4K/5R2 w - - 0 1 >>>>> >>>>> >>>>>White mates in about 9 or 14... >>>>> >>>>>Best move is.. >>>>> >>>>>Qf5, Bf6, or Rxe8+.....? >>>>> >>>>>Thanks >>>>> >>>>>Rob >>>>> >>>>>Thanks to John Merlino for your help on these test diagrams...:-) >>>> >>>>It takes exactly one minute for CMX Yoda v25 on a P4-2.4 to announce Mate in 9 >>>>with Bf6: >>>> >>>>Time Depth Score Positions Moves >>>>0:00 1/3 10.52 4465 1.Bf6 Rxe7 2.Bxd4 Rd8 >>>>0:00 1/4 10.39 9920 1.Bf6 Rxe7 2.Bxd4 Rd8 3.Qf3 >>>>0:00 1/5 10.54 51151 1.Bf6 Rxe7 2.Bxd4 Rd8 3.Qg5 Red7 >>>>0:00 1/5 12.04 189663 1.Qf5 Qe5 2.Rxe5 Nxe5 3.Nd6 Rxc2+ >>>> 4.Qxc2 >>>>0:01 1/6 13.31 312119 1.Qf5 Qe5 2.Rxe5 Nxe5 3.Nd6 Rxc2+ >>>> 4.Qxc2 Rb8 5.Qe4 Ng6 >>>>0:03 1/7 14.55 858973 1.Qf5 Qd5 2.Rxe8+ Rxe8 3.Qxd5 Ne3 >>>> 4.Qf7 Nxf1+ 5.Qxf1 Bd4 6.Qf7 >>>>0:11 1/8 16.40 2967418 1.Qf5 Qe5 2.Rxe5 Nxe5 3.Nd6 Rxc2+ >>>> 4.Qxc2 Rb8 5.Nc8 Ng6 6.Nxb6 Nxh4 >>>> 7.gxh4 >>>>0:30 1/9 17.20 8063147 1.Qf5 Qe5 2.Rxe5 Nxe5 3.Nd6 Rxc2+ >>>> 4.Qxc2 Rg8 5.Qf5 Bc5 6.Qxe5 Bxd6 >>>> 7.Qxd6 a5 >>>>1:00 1/9 Mate09 16434288 1.Bf6 Rxe7 2.Bxd4 Rg8 3.Ng5 Ne5 >>>> 4.Qe4 Ng6 5.Qxe7 h6 6.Nf7+ Kh7 >>>> 7.Bxg6+ Kxg6 8.Qe4+ Kh5 9.Qg4# >>>>1:04 1/10 Mate09 17702274 1.Bf6 Rxe7 2.Bxd4 Rg8 3.Ng5 Ne3 >>>> 4.Qe4 Nxf1+ 5.Kg2 Ne3+ 6.Bxe3 g6 >>>> 7.Qxe7 Rg7 8.Qf8+ Rg8 9.Nf7# >>>>1:34 1/11 Mate09 27485404 1.Bf6 Rxe7 2.Bxd4 Rg8 3.Ng5 Ne3 >>>> 4.Qe4 Nxf1+ 5.Kg2 Ne3+ 6.Bxe3 g6 >>>> 7.Qxe7 Rg7 8.Qf8+ Rg8 9.Nf7# >>>> >>>>It appears that both Rxe8+ and Qf5 are Mates in about 15 moves. >>>> >>>>jm >>> >>> >>>Only Junior finds this mate faster. >> >>For comparison, here's Shredder >>Finds Mate >>Depth: 15/36 00:00:43 15751kN >>Now that's fast.. >> >> >> >> >>New game, >>[D]2r1r2k/4R1pp/pb6/1p6/2nqN1QB/P5PP/1PB4K/5R2 w - - 0 1 >> >>Analysis by Shredder 8: >> >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bc3 Be3 >> +- (9.95) Depth: 5/16 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 >> +- (9.95) Depth: 6/19 00:00:00 >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 5.Kg2 >> +- (10.04) Depth: 7/18 00:00:00 59kN >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.b3 Nd5 5.Qg5 Re5 >> +- (10.13) Depth: 8/20 00:00:00 130kN >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Nf6 Nd2 4.Rf5 Re2+ 5.Rf2 Nf1+ 6.Kg2 Rxf2+ 7.Kxf2 Ne3 >> +- (10.20) Depth: 9/20 00:00:01 259kN >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.Nd6 Na4 5.Nxe8 Rxe8 >> +- (10.45) Depth: 10/26 00:00:01 488kN >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Bxb6 Nxb6 4.Nd6 Re2+ 5.Kg1 Nd5 6.Nxe8 Rg2+ 7.Kxg2 Nf4+ >>8.gxf4 >> +- (10.95) Depth: 10/26 00:00:01 527kN >>1.Bf6 Rxe7 2.Bxd4 Ra8 3.Qh4 Re6 4.Nc3 h6 5.Bxg7+ Kg8 6.Bxh6 Nxb2 7.Qg4+ Rg6 >>8.Bxg6 >> +- (15.46) Depth: 10/34 00:00:04 1467kN >>1.Bf6 Rxe7 2.Bxd4 Rg8 3.Bxb6 Nxb6 4.Nd6 h6 5.Qg6 Nc4 6.Nf7+ Rxf7 7.Qh7# >> +- (15.70) Depth: 11/32 00:00:07 2343kN >>1.Bf6 Rxe7 2.Bxd4 Rg8 3.Ng5 Ne3 4.Bxe3 Bc7 5.Nf7+ Rxf7 6.Rxf7 >> +- (15.95) Depth: 12/41 00:00:14 4606kN >>1.Bf6 Rxe7 2.Bxd4 Rg8 3.Ng5 Ne3 4.Bxe3 Bc7 5.Nf7+ Rxf7 6.Rxf7 Be5 >> +- (16.45) Depth: 12/41 00:00:14 4749kN >>1.Bf6 Qxf6 2.Nxf6 Bg1+ 3.Kxg1 Rg8 4.Nxg8 Nxb2 5.Qxg7# >> +- (#152) Depth: 12/42 00:00:22 7641kN >>1.Bf6 Rxe7 2.Bxd4 Rd8 3.Qh4 Ree8 4.Nc3 Re2+ 5.Nxe2 h6 6.Kh1 Rxd4 7.Rf8# >> +- (#152) Depth: 13/18 00:00:23 7840kN >>1.Bf6 Rxe7 2.Bxd4 Rd8 3.Qh4 Bxd4 4.Qxe7 Rg8 5.Rf8 Bg1+ 6.Kxg1 Nd6 7.Qxd6 b4 >>8.Rxg8+ Kxg8 9.Qd8+ Kf7 >> +- (#150) Depth: 14/40 00:00:43 15586kN >>1.Bf6 Rxe7 2.Bxd4 Rd8 3.Qh4 Bxd4 4.Qxe7 Rg8 5.Rf8 Bc5 6.Nxc5 Nd6 7.Qxd6 b4 >>8.Rxg8+ Kxg8 9.Qe6+ Kf8 10.Nd7# >> +- (#150) Depth: 15/36 00:00:43 15751kN >>1.Bf6 Rxe7 2.Bxd4 Rd8 3.Qh4 h5 4.Qxe7 Ne5 5.Qxe5 Bxd4 6.Qxh5+ Kg8 7.Bb3+ Rd5 >>8.Bxd5# >> +- (#150) Depth: 16/38 00:00:47 17089kN >>1.Bf6 Rxe7 2.Bxd4 Rce8 3.Qf5 Kg8 4.Ng5 g6 5.Qd5+ Re6 6.Rf8+ Kxf8 7.Qf3+ Ke7 >>8.Qb7+ Bc7 9.Qxc7+ Kf8 10.Qg7# >> +- (#150) Depth: 17/36 00:00:49 17858kN >> >>(, 11.04.2005) > >Shredder's output is incredibly bizarre here. The position is a Mate in 9, but >not a single PV shows mate in 9 moves (although there are mates shown in 10, 7 >and even 5 moves!??). > >Conclusion: Shredder found the best move, but did NOT conclusively find the mate >in 9. > >jm Thanks John.. Looks like Bf6 is the best move...:-) Rob
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