Author: Richard A. Fowell (fowell@netcom.com)
Date: 10:28:56 04/17/99
Go up one level in this thread
On April 15, 1999 at 18:18:50, Peter McKenzie wrote: >The Nolot test suite is a set of 11 very hard test positions, with the 11th >position being one of the easier ones. I tried it on lambchop last night, chop >managed to solve it in about 3000sec (50min) on my 133mhz Pentium with 32mb RAM. > The solution was found at ply 11. How do other programs go on this one? > >r1b3k1/p2p1nP1/2pqr1Rp/1p2p2P/2B1PnQ1/1P6/P1PP4/1K4R1 w - - >Solution: Rxh6 > > >cheers, >Peter On April 15, 1999 at 18:18:50, Peter McKenzie wrote: >The Nolot test suite is a set of 11 very hard test positions, with the 11th >position being one of the easier ones. I tried it on lambchop last night, chop >managed to solve it in about 3000sec (50min) on my 133mhz Pentium with 32mb RAM. > The solution was found at ply 11. How do other programs go on this one? > >r1b3k1/p2p1nP1/2pqr1Rp/1p2p2P/2B1PnQ1/1P6/P1PP4/1K4R1 w - - >Solution: Rxh6 > > >cheers, >Peter MacChess 5.01 32M hash 7300/180 (I180 MHz 604e) finds this relatively quickly. Log file is given below. (Can we see the lambchop log file?) If your solution criteria is: (A) "finds the key move and never abandons it thereafter", MacChess solves in 12 min, 48 seconds. (B) Meets criteria (A) and also shows a signficant eval improvement over the prior solutions (e.g., the "seems to understand that the solution is significantly better than the alternatives" criteria (I mention this, since I think Nolot required this stricter criteria): 33 min, 41 seconds. Of course, MacChess had the advantage of a faster machine, both in MHz and in throughput per MHz. If we try to adjust for that, based on: Lambchop: 133 MHz and 69 Nps/MHz (based on HIARCS 6.0, 120MHz P5) MacChess: 180 MHz and 123 nps/MHz (based on HIARCS 6.0, 180 MHz 604e) MacChess has a hardware advantage factor of 2.41, which would suggest equivalent solution times on your machine of: (A) 31 min (B) 81 min Richard A. Fowell (fowell@netcom.com) Thursday, April 15, 1999 10:57 PM 02/01|00:00:00| 376| -175| Bxe6 Nxe6 03/01|00:00:00| 988| -171| Bxe6 Nxe6 d3 04/01|00:00:01| 4859| -176| Bxe6 Nxe6 d3 Ba6 05/01|00:00:01| 14877| -262| Bxe6 dxe6 Rf6 Qe7 Rxf4 exf4 Qxf4 06/01|00:00:01| 67545| -267| Bxe6 dxe6 Rf6 Qe7 Rxf4 exf4 Qxf4 Ba6 07/01|00:00:02| 241824| -305| Bxe6 dxe6 Qf3 b4 R6g4 Ng5 Qe3 Kxg7 08/01|00:00:04| 503805| -305| Bxe6 dxe6 Qf3 b4 R6g4 Ng5 Qe3 Kxg7 09/01|00:00:13| 1771844| -270| Bxe6 dxe6 Qh4 Qd4 Qe7 Bd7 R6g4 Nxh5 d3 Nf4 10/01|00:02:32| 23480505| -181| Bxe6 Nxe6 Qh4 Qc5 Rf1 Neg5 d3 d5 exd5 cxd5 Qf2 Qxf2 Rxf2 11/01|00:02:48| 25848291| -181| Bxe6 Nxe6 Qh4 Qc5 Rf1 Neg5 d3 d5 exd5 cxd5 Qf2 Qxf2 Rxf2 12/01|00:05:02| 45925517| -181| Bxe6 Nxe6 Qh4 Qc5 Qf6 Ba6 R1g3 Nd4 c3 Ne6 R6g4 Rb8 12/34|00:12:48| 119033359| -144| Rxh6 Nxh6 Qg5 Nf7 Qd8+ Nxd8 h6 Ng6 Rxg6 Qf8 h7+ Kxh7 gxf8=N+ Kh8 Nxe6 Nxe6 Bxe6 dxe6 13/01|00:33:41| 317267025| +4| Rxh6 Nxh6 Qg5 Nf7 Qd8+ Nxd8 h6 Qe7 h7+ Kxh7 g8=Q+ Kh6 Qh8+ Qh7 Rh1+ Nh5 Rxh5+ Kxh5 Qxh7+ Kg4 Bxe6+ Nxe6 Qf5+ Kh4 Qxe5 14/01|00:57:46| 548149534| +4| Rxh6 Nxh6 Qg5 Nf7 Qd8+ Nxd8 h6 Qe7 h7+ Kxh7 g8=Q+ Kh6 Qh8+ Qh7 Rh1+ Nh5 Rxh5+ Kxh5 Qxh7+ Kg4 Qf5+ Kh4 Bxe6 Nxe6 Qxe5 15/01|01:46:37| 1014125654| +3| Rxh6 Nxh6 Qg5 Nf7 Qd8+ Nxd8 h6 Qe7 h7+ Kxh7 g8=Q+ Kh6 Qh8+ Qh7 Rh1+ Nh5 Rxh5+ Kxh5 Qxh7+ Kg5 Bxe6 Nxe6 Qf5+ Kh6 Qf6+ Kh7 Qxe5 16/01|03:31:14| 2015174297| +3| Rxh6 Nxh6 Qg5 Nf7 Qd8+ Nxd8 h6 Qe7 h7+ Kxh7 g8=Q+ Kh6 Qh8+ Qh7 Rh1+ Nh5 Rxh5+ Kxh5 Qxh7+ Kg5 Bxe6 Nxe6 Qf5+ Kh6 Qxe5 Ba6 d3 17/01|14:59:38| 8676892984| +61| Rxh6 Nxh6 Qg5 Nf7 Qd8+ Nxd8 h6 Qd4 h7+ Kf7 g8=Q+ Ke7 Rg7+ Kd6 h8=Q Bb7 Qxd8 Rxd8 Qxd8 Kc5 Bxe6 Nxe6 Saturday, April 17, 1999 10:06 AM
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