Author: Robert Hyatt
Date: 07:47:13 05/02/04
Go up one level in this thread
On May 01, 2004 at 19:33:02, J. Wesley Cleveland wrote: >On May 01, 2004 at 17:33:34, Vincent Lejeune wrote: > >>On May 01, 2004 at 17:05:27, J. Wesley Cleveland wrote: >> >>>On April 30, 2004 at 23:43:48, Robert Hyatt wrote: >>> >>>>On April 30, 2004 at 17:21:34, José Antônio Fabiano Mendes wrote: >>>> >>>>> [D]7k/6p1/2P3Qp/p3q2P/8/6P1/5K2/8 w >>>>> Bogoljubow vs Stahlberg, Kemeri 1933 1. Qc2!! Qxh5 2. Qc4! >>>> >>>>This one takes crafty depth=16, not real quick. Almost 4 minutes to pick Qc2, >>>>several more to see how good it really is... >>>> >>>[snip] >>>While looking at this with crafty, I found the ugliest fail high I've seen with >>>crafty. >>> >>>[D]2q4k/6p1/2P4p/p7/2Q5/6P1/6K1/8 w - - 0 4 >>> >>>hash table memory = 96M bytes. >>>pawn hash table memory = 6M bytes. >>> >>>Crafty v19.10 >>> >>>White(1): sd 11 >>>search depth set to 11. >>>White(1): 2q4k/6p1/2P4p/p7/2Q5/6P1/6K1/8 w - - 0 4 >>>White(1): analyze >>>Analyze Mode: type "exit" to terminate. >>>end-game phase >>> clearing hash tables >>> time surplus 0.00 time limit 22.50 (3:30) >>> depth time score variation (1) >>> 7-> 0.12 -0.14 1. Qb5 Qd8 2. Kf3 Qf8+ 3. Kg4 Qd6 4. >>> Kf5 Qc7 >>> 8 0.18 -0.15 1. Qb5 Qd8 2. Kf3 Qd6 3. Qc4 Qf6+ 4. >>> Kg4 g6 5. Qd5 >>> 8 0.46 -0.03 1. Kf3 Qd8 2. Qe4 Qd1+ 3. Kf4 Qd6+ >>> 4. Kf3 Qc7 5. Qd5 <HT> >>> 8-> 0.48 -0.03 1. Kf3 Qd8 2. Qe4 Qd1+ 3. Kf4 Qd6+ >>> 4. Kf3 Qc7 5. Qd5 <HT> >>> 9 0.95 -0.05 1. Kf3 Qf5+ 2. Ke3 Qe5+ 3. Kf3 Qf6+ >>> 4. Ke4 Qe7+ 5. Kf3 Qa3+ 6. Kg2 Qf8 >>> 7. c7 Qa8+ 8. Kf2 Qc8 >>> 9 1.14 0.01 1. Qd5 a4 2. Qd7 Qa6 3. c7 Qe2+ 4. >>> Kh3 Qh5+ 5. Kg2 Qe2+ >>> 9-> 1.15 0.01 1. Qd5 a4 2. Qd7 Qa6 3. c7 Qe2+ 4. >>> Kh3 Qh5+ 5. Kg2 Qe2+ >>> 10 1.28 0.01 1. Qd5 a4 2. Qd7 Qa6 3. c7 Qe2+ 4. >>> Kh3 Qh5+ 5. Kg2 Qe2+ >>> 10 1.87 ++ 1. c7!! >>> 10 17:13 1.45 1. c7 Qb7+ 2. Kh2 Qc8 3. Qc5 Kh7 4. >>> g4 Kh8 5. Qxa5 <HT> >>> 10-> 17:13 1.45 1. c7 Qb7+ 2. Kh2 Qc8 3. Qc5 Kh7 4. >>> g4 Kh8 5. Qxa5 <HT> >>> 11 17:14 ++ 1. c7!! >>> 11 17:15 5.72 1. c7 Qb7+ 2. Kh2 Qc8 3. Qc5 Kh7 4. >>> g4 a4 5. Qf5+ Qxf5 6. gxf5 a3 7. c8=Q >>> a2 8. Qc3 >>> 11-> 17:15 5.72 1. c7 Qb7+ 2. Kh2 Qc8 3. Qc5 Kh7 4. >>> g4 a4 5. Qf5+ Qxf5 6. gxf5 a3 7. c8=Q >>> a2 8. Qc3 >>> time=17:15 cpu=88% mat=-1 n=1791242494 fh=99% nps=1.73M >>> ext-> chk=381633369 cap=48652 pp=55417 1rep=27688883 mate=994 >>> predicted=0 nodes=1791242494 evals=48417627 >>> endgame tablebase-> probes=0 hits=0 >>> hashing-> 65%(raw) 64%(depth) 99%(sat) 99%(pawn) >>> hashing-> 0%(exact) 56%(lower) 1%(upper) >> >> >>Shredder think it's a draw after 1.c7, some pertpetual missed to crafty I think. >>Could you let crafty think a little longer ? I'm about sure you will see the >>"ugliest fail low you've seen with crafty" ;) >> >Crafty fails low to a draw score quickly on the next ply. What makes this so >ugly is that it takes 1.87 seconds to fail high, and 17:13 *minutes* to resolve >the fail high. You should be using 19.12 which doesn't do this as it fails high/low in increments, not all at once.
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