Author: Richard Pijl
Date: 08:06:53 07/08/03
Go up one level in this thread
On July 08, 2003 at 02:45:12, Jouni Uski wrote: >[D]8/3R1P2/1ppP1p2/3r4/8/K7/p4k2/8 w - - bm Kb2 > >Also this was considered 1998 as unsolvable by current hard/software. Not >anymore: > >Analysis by Ruffian 1.0.5: > >1.Kxa2 > +- (7.73) Depth: 20/45 00:05:02 305105kN >1.Kxa2 f5 2.f8B f4 3.Be7 Ke3 4.Bd8 f3 5.Bh4 Kd3 6.Rf7 Rxd6 > ² (0.69) Depth: 20/45 00:09:22 574275kN >1.Kb2 a1Q+ 2.Kxa1 Ra5+ 3.Kb2 Rb5+ 4.Kc2 Rc5+ 5.Kd3 f5 6.Ra7 Rd5+ 7.Kc3 Rc5+ >8.Kb2 > +- (8.17) Depth: 20/49 00:31:14 1977644kN > Another program able to do this in about half an hour is the Baron SMP (on AMD 2000+ MP (dual)): ply time nodes score pv 7(13)& 0 12985 -19 a3a2 d5a5 a2b2 a5a8 d7a7 a8h8 a7a6 h8b8 7(13). 0 14153 -19 a3a2 d5a5 a2b2 a5a8 d7a7 a8h8 a7a6 h8b8 8(17)+ 0 36592 17 a3a2 d5a5 a2b2 a5a8 d7b7 c6c5 b7b6 a8f8 b6b5 8(17)& 0 55534 105 a3a2 d5a5 a2b3 a5a8 d7c7 b6b5 d6d7 a8h8 c7c6 f6f5 8(17). 0 56524 105 a3a2 d5a5 a2b3 a5a8 d7c7 b6b5 d6d7 a8h8 c7c6 f6f5 9(18)& 0 101113 93 a3a2 d5a5 a2b3 a5a8 d7c7 c6c5 c7b7 a8f8 b3c4 f6f5 9(18). 0 101134 93 a3a2 d5a5 a2b3 a5a8 d7c7 c6c5 c7b7 a8f8 b3c4 f6f5 10(20)+ 0 164408 128 a3a2 d5d1 a2b3 d1d3 b3c2 b6b5 f7f8q d3d6 10(20)+ 0 236648 218 a3a2 d5a5 a2b3 a5a8 d7e7 a8f8 d6d7 c6c5 e7e8 c5c4 b3c4 f8f7 d7d8q 10(20)& 0 366882 459 a3a2 d5a5 a2b3 a5a8 d7e7 a8f8 d6d7 b6b5 e7e8 f8f7 d7d8q c6c5 10(20). 1 374565 459 a3a2 d5a5 a2b3 a5a8 d7e7 a8f8 d6d7 b6b5 e7e8 f8f7 d7d8q c6c5 11(21)& 1 541240 481 a3a2 d5a5 a2b3 a5a8 d7e7 a8f8 d6d7 f8d8 f7f8q d8f8 e7e8 f8e8 d7e8q 11(21). 1 565597 481 a3a2 d5a5 a2b3 a5a8 d7e7 a8f8 d6d7 f8d8 f7f8q d8f8 e7e8 f8e8 d7e8q 12(21)+ 2 898299 516 a3a2 d5a5 a2b3 a5a8 d7e7 a8f8 d6d7 f8d8 e7e8 d8d7 f7f8q b6b5 f8f6 f2g3 12(23)& 3 1248585 596 a3a2 d5a5 a2b3 a5a8 d7e7 a8f8 d6d7 b6b5 e7e8 f8f7 d7d8q f6f5 d8b6 f2g3 b6c6 12(23). 3 1248606 596 a3a2 d5a5 a2b3 a5a8 d7e7 a8f8 d6d7 b6b5 e7e8 f8f7 d7d8q f6f5 d8b6 f2g3 b6c6 13(30)& 8 2366154 614 a3a2 d5a5 a2b3 a5a8 d7e7 a8f8 d6d7 f6f5 e7e8 f8f7 d7d8q f7b7 d8d2 f2f3 d2c3 f3g4 e8g8 g4f4 13(30). 8 2385893 614 a3a2 d5a5 a2b3 a5a8 d7e7 a8f8 d6d7 f6f5 e7e8 f8f7 d7d8q f7b7 d8d2 f2f3 d2c3 f3g4 e8g8 g4f4 14(33)& 21 4665337 643 a3a2 d5a5 a2b3 a5a8 d7e7 a8d8 e7e8 d8d6 f7f8q d6d3 b3b2 d3f3 f8b4 f2g2 e8g8 14(36). 25 5034686 643 a3a2 d5a5 a2b3 a5a8 d7e7 a8d8 e7e8 d8d6 f7f8q d6d3 b3b2 d3f3 f8b4 f2g2 e8g8 15(35)+ 52 8603832 678 a3a2 d5h5 f7f8q h5g5 a2b3 b6b5 f8f6 g5f5 f6f5 f2g2 b3a2 c6c5 f5f6 g2h2 d7d8 h2g3 a2a3 c5c4 a3a2 g3g2 a2a1 g2g3 a1a2 <rep> 15(38)& 136 22647421 746 a3a2 d5a5 a2b3 a5a8 d7e7 f6f5 e7e8 a8a5 f7f8q a5b5 b3c2 b5c5 c2d3 c5d5 d3c4 d5c5 c4d3 <rep> 15(39). 152 24304641 746 a3a2 d5a5 a2b3 a5a8 d7e7 f6f5 e7e8 a8a5 f7f8q a5b5 b3c2 b5c5 c2d3 c5d5 d3c4 d5c5 c4d3 <rep> 16(42)& 573 111638014 751 a3a2 f6f5 d7a7 d5e5 f7f8q e5e2 a2a3 e2e3 a3b4 e3e4 b4c3 e4e3 c3b4 <rep> 16(42). 573 111638036 751 a3a2 f6f5 d7a7 d5e5 f7f8q e5e2 a2a3 e2e3 a3b4 e3e4 b4c3 e4e3 c3b4 <rep> 17(44)& 957 198112405 724 a3a2 f6f5 f7f8q d5a5 a2b3 a5b5 b3c3 b5c5 c3d3 c5d5 d3c2 d5c5 c2d2 c5d5 d2c1 d5c5 c1d2 <rep> 17(47)& 2151 517077249 725 a3b2 a2a1q b2a1 d5a5 a1b1 f6f5 d7a7 a5b5 b1c2 b5c5 c2d3 b6b5 f7f8q c5d5 d3c2 c6c5 c2b2 d5d1 17(47). 2234 530745415 725 a3b2 a2a1q b2a1 d5a5 a1b1 f6f5 d7a7 a5b5 b1c2 b5c5 c2d3 b6b5 f7f8q c5d5 d3c2 c6c5 c2b2 d5d1 18(50)& 4615 1061703041 725 a3b2 a2a1q b2a1 d5a5 a1b1 a5b5 b1c2 b5c5 c2d3 f6f5 f7f8r c5b5 d7a7 18(51). 5749 1307269042 725 a3b2 a2a1q b2a1 d5a5 a1b1 a5b5 b1c2 b5c5 c2d3 f6f5 f7f8r c5b5 d7a7 Interesting is that the Baron SMP had a superlinear speedup compared to the single CPU version. A full 14 ply search took the SMP Version 25 seconds where the single CPU version needed 104 seconds. bye, Richard.
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