Author: Heiner Marxen
Date: 10:29:09 01/07/02
Go up one level in this thread
On January 07, 2002 at 11:34:03, Vincent Diepeveen wrote: >On January 07, 2002 at 11:22:18, Robert Basham wrote: > >>Extreme Chess takes 15 ply and 42 sec. to find >>1. Rh8+...! but then has trouble playing it out to the end... >> >>(The same kind of problem occurs with Hiarcs7 also)... >> >>[D]qn1rn1k1/2rp2N1/2b1p1K1/4Bp2/p7/1p6/2p5/7R w - - > >diep single cpu: > >process 0: engineflags = 0 denktime=10000000 maxtime=10000000 >00:00 0 0 58 (0) 1 -40.168 Be5xc7 Bc6xh1 Bc7xd8 Ne8xg7 >00:00 0 0 203 (0) 1 -29.508 Ng7xe8 >++ h1-h8 >00:00 0 0 423 (0) 1 0.000 Rh1-h8 Kg8xh8 Ng7xe8 Kh8-g8 Ne8-f6 Kg8-h8 Nf6-g4 Kh8-g >8 Ng4-f6 >00:00 0 0 574 (0) 2 0.000 Rh1-h8 Kg8xh8 Ng7xe8 Kh8-g8 Ne8-f6 Kg8-h8 Nf6-g4 Kh8-g >8 Ng4-f6 >00:00 0 0 1644 (0) 3 0.000 Rh1-h8 Kg8xh8 Ng7xe8 Kh8-g8 Ne8-f6 Kg8-h8 Nf6-g4 Kh8- >g8 Ng4-f6 >00:00 0 0 3310 (0) 4 0.000 Rh1-h8 Kg8xh8 Ng7xe8 Kh8-g8 Ne8-f6 Kg8-h8 Nf6-e8 >00:00 0 0 7423 (0) 5 0.000 Rh1-h8 Kg8xh8 Ng7xe8 Kh8-g8 Ne8-f6 Kg8-h8 Nf6-e8 >00:00 0 0 9896 (0) 6 0.000 Rh1-h8 Kg8xh8 Ng7xe8 Kh8-g8 Ne8-f6 Kg8-h8 Nf6-e8 >00:00 0 0 19856 (0) 7 0.000 Rh1-h8 Kg8xh8 Ng7xe8 Kh8-g8 Ne8-f6 Kg8-h8 Nf6-e8 >00:00 0 0 59143 (0) 8 0.000 Rh1-h8 Kg8xh8 Ng7xe8 Kh8-g8 Ne8-f6 Kg8-h8 Nf6-e8 >00:01 0 0 121965 (0) 9 0.000 Rh1-h8 Kg8xh8 Ng7xe8 Kh8-g8 Ne8-f6 Kg8-h8 Nf6-e8 >00:03 0 0 242160 (0) 10 0.000 Rh1-h8 Kg8xh8 Ng7xe8 Kh8-g8 Ne8-f6 Kg8-h8 Nf6-e8 >00:05 0 0 442239 (0) 11 MATE12 Rh1-h8 Kg8xh8 Ng7xe8 Kh8-g8 Ne8-f6 Kg8-h8 Nf6-g4 >Kh8-g8 Ng4-h6 Kg8-f8 Be5-d6 Kf8-e8 Nh6-g8 Rd8-c8 Ng8-f6 Ke8-d8 Kg6-f7 Rc7-a7 Nf6 >-e8 Rc8-c7 Bd6-e7 Kd8-c8 Ne8-d6 To verify that this is the shortest and unique mate Chest needs 70 minutes on an Athlon XP 1500+ with 128MB hash: PV: Rh8+ Kxh8 Nxe8+ Kg8 Nf6+ Kh8 Ng4+ Kg8 Nh6+ Kf8 Bd6+ Ke8 Ng8 Rdc8 Nf6+ Kd8 Kf7 Rb7 Ne8 Rcc7 Be7+ Kc8 Nd6# (nearly identical) # 4 0.03s 2kN [ 6.98] 1.15 544- 0 # 5 0.14s [ 4.67] 11kN [ 5.04] 1.54 2653- 0 # 6 0.64s [ 4.57] 53kN [ 4.83] 1.95 13440- 0 # 7 2.80s [ 4.38] 273kN [ 5.12] 2.54 65346- 0 # 8 10.33s [ 3.69] 1133kN [ 4.15] 3.28 266081- 0 # 9 39.14s [ 3.79] 4414kN [ 3.90] 4.08 1025109- 247 # 10 152.42s [ 3.89] 16877kN [ 3.82] 4.80 3914255- 852071 # 11 724.66s [ 4.75] 77909kN [ 4.62] 4.82 18536276- 15337043 # 12 4199.66s [ 5.80] 454667kN [ 5.84] 4.79 107933663- 104734430 Hey, Leonid, how does your EBF look like, here? Cheers, Heiner
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