Author: Slater Wold
Date: 20:34:45 10/18/01
Go up one level in this thread
On October 18, 2001 at 22:55:02, Dann Corbit wrote: >On October 18, 2001 at 21:01:46, Slater Wold wrote: > >>On October 18, 2001 at 09:14:43, José Antônio Fabiano Mendes wrote: >> >>> L.D.Evans-Haik,London 1978 [unusual and difficult position] >>> [D]8/p2P3P/k7/8/8/2q5/6PK/1Q6 b >>> "Surprisingly Black can deliver perpetual check or force stalemate." >>> Source:"Tactical Chess Endings",by GM John Nunn,page 35 >> >>Talk about a bummer.............. >> >>EPD Kit revision date: 1996.04.21 >>found computer opening book file [./bookc.bin]. >>max threads set to 2 >>hash table memory = 768M bytes. >>pawn hash table memory = 40M bytes. >>EGTB cache memory = 32M bytes. >>6 piece tablebase files found >>26330kb of RAM used for TB indices and decompression tables >>choose from 2 best moves. >> >> >>Crafty v18.12 (2 cpus) >> >>White(1): st 3600 >>search time set to 3600.00. >>White(1): epdpfga drawtest.epd drawtest.out >>PFGA: EPD record: 1 >>end-game phase >> clearing hash tables >> time surplus 0.00 time limit 60:00 (60:00) >> nss depth time score variation (1) >>starting thread 1 >> 7 0.14 6.02 1. ... Qe5+ 2. Kh3 Qh5+ 3. Kg3 Qe5+ >> 4. Kg4 Qd4+ 5. Kg5 Qd2+ 6. Kh5 Qd4 >> 7. Qg6+ Kb7 8. g4 >> 7-> 0.16 6.02 1. ... Qe5+ 2. Kh3 Qh5+ 3. Kg3 Qe5+ >> 4. Kg4 Qd4+ 5. Kg5 Qd2+ 6. Kh5 Qd4 >> 7. Qg6+ Kb7 8. g4 >> 8 0.29 5.92 1. ... Qe5+ 2. Kh3 Qh5+ 3. Kg3 Qe5+ >> 4. Kg4 Qd4+ 5. Kg5 Qe3+ 6. Kf6 Qd4+ >> 7. Ke6 Qc4+ 8. Ke5 Qc7+ 9. Ke6 Qd8 >> 8-> 0.33 5.92 1. ... Qe5+ 2. Kh3 Qh5+ 3. Kg3 Qe5+ >> 4. Kg4 Qd4+ 5. Kg5 Qe3+ 6. Kf6 Qd4+ >> 7. Ke6 Qc4+ 8. Ke5 Qc7+ 9. Ke6 Qd8 >> 9 0.63 5.92 1. ... Qe5+ 2. Kh3 Qh5+ 3. Kg3 Qe5+ >> 4. Kg4 Qd4+ 5. Kg5 Qe3+ 6. Kf6 Qd4+ >> 7. Ke6 Qc4+ 8. Ke5 Qc3+ 9. Kd5 Qa5+ >> 10. Ke6 Qd8 >> 9-> 0.72 5.92 1. ... Qe5+ 2. Kh3 Qh5+ 3. Kg3 Qe5+ >> 4. Kg4 Qd4+ 5. Kg5 Qe3+ 6. Kf6 Qd4+ >> 7. Ke6 Qc4+ 8. Ke5 Qc3+ 9. Kd5 Qa5+ >> 10. Ke6 Qd8 >> 10 1.24 5.82 1. ... Qe5+ 2. Kh3 Qh5+ 3. Kg3 Qe5+ >> 4. Kg4 Qd4+ 5. Kf3 Qc3+ 6. Kf4 Qd2+ >> 7. Ke5 Qc3+ 8. Ke6 Qc4+ 9. Ke5 Qc5+ >> 10. Kf4 Qd6+ 11. Kf3 Qa3+ <HT> >> 10-> 1.33 5.82 1. ... Qe5+ 2. Kh3 Qh5+ 3. Kg3 Qe5+ >> 4. Kg4 Qd4+ 5. Kf3 Qc3+ 6. Kf4 Qd2+ >> 7. Ke5 Qc3+ 8. Ke6 Qc4+ 9. Ke5 Qc5+ >> 10. Kf4 Qd6+ 11. Kf3 Qa3+ <HT> >> 11 2.30 5.82 1. ... Qe5+ 2. Kh3 Qh5+ 3. Kg3 Qe5+ >> 4. Kg4 Qd4+ 5. Kf3 Qc3+ 6. Kf4 Qd2+ >> 7. Ke5 Qc3+ 8. Ke6 Qc4+ <HT> >> 11-> 2.71 5.82 1. ... Qe5+ 2. Kh3 Qh5+ 3. Kg3 Qe5+ >> 4. Kg4 Qd4+ 5. Kf3 Qc3+ 6. Kf4 Qd2+ >> 7. Ke5 Qc3+ 8. Ke6 Qc4+ <HT> >> 12 5.02 5.82 1. ... Qe5+ 2. Kh3 Qh5+ 3. Kg3 Qe5+ >> 4. Kg4 Qd4+ 5. Kf3 Qc3+ 6. Kf4 Qd2+ >> 7. Ke5 Qc3+ 8. Kd5 Qd2+ 9. Ke6 Qe3+ >> 10. Kf6 Qd4+ <HT> >> 12-> 5.50 5.82 1. ... Qe5+ 2. Kh3 Qh5+ 3. Kg3 Qe5+ >> 4. Kg4 Qd4+ 5. Kf3 Qc3+ 6. Kf4 Qd2+ >> 7. Ke5 Qc3+ 8. Kd5 Qd2+ 9. Ke6 Qe3+ >> 10. Kf6 Qd4+ <HT> >> 13 7.79 ++ 1. ... Qe5+!! >> 13 13.49 4.22 1. ... Qe5+ 2. Kh3 Qh5+ 3. Kg3 Qe5+ >> 4. Kh4 Qe7+ 5. Kh5 Qc5+ 6. Kh6 Qf8+ >> 7. Kg5 Qe7+ 8. Kf4 Qd6+ 9. Ke3 Qg3+ >> 10. Kd2 Qxg2+ 11. Ke3 Qg3+ 12. Kd4 >> Qd6+ 13. Kc4 Qc7+ 14. Kb4 Qd8 >> 13-> 14.55 4.22 1. ... Qe5+ 2. Kh3 Qh5+ 3. Kg3 Qe5+ >> 4. Kh4 Qe7+ 5. Kh5 Qc5+ 6. Kh6 Qf8+ >> 7. Kg5 Qe7+ 8. Kf4 Qd6+ 9. Ke3 Qg3+ >> 10. Kd2 Qxg2+ 11. Ke3 Qg3+ 12. Kd4 >> Qd6+ 13. Kc4 Qc7+ 14. Kb4 Qd8 >> 14 25.82 ++ 1. ... Qe5+!! >> 14 27.55 2.00 1. ... Qe5+ 2. Kh3 Qe6+ 3. g4 Qe3+ >> 4. Kh2 Qf4+ 5. Kg2 Qxg4+ 6. Kf2 Qf4+ >> 7. Ke2 Qg4+ 8. Ke3 Qg3+ 9. Kd4 Qd6+ >> 10. Ke4 Qb4+ 11. Kd5 Qxb1 12. h8=Q >> Qa2+ 13. Kc6 Qc2+ 14. Kd6 >> 14-> 29.02 2.00 1. ... Qe5+ 2. Kh3 Qe6+ 3. g4 Qe3+ >> 4. Kh2 Qf4+ 5. Kg2 Qxg4+ 6. Kf2 Qf4+ >> 7. Ke2 Qg4+ 8. Ke3 Qg3+ 9. Kd4 Qd6+ >> 10. Ke4 Qb4+ 11. Kd5 Qxb1 12. h8=Q >> Qa2+ 13. Kc6 Qc2+ 14. Kd6 >> 15 32.80 2.00 1. ... Qe5+ 2. Kh3 Qe6+ 3. g4 Qe3+ >> 4. Kh2 Qf4+ 5. Kg2 Qxg4+ 6. Kf2 Qf4+ >> 7. Ke2 Qg4+ 8. Ke3 Qg3+ 9. Kd4 Qd6+ >> 10. Ke4 Qb4+ 11. Kd5 Qxb1 12. h8=Q >> Qa2+ 13. Kd6 Qd2+ 14. Kc7 Qc2+ <HT> >> 15-> 34.79 2.00 1. ... Qe5+ 2. Kh3 Qe6+ 3. g4 Qe3+ >> 4. Kh2 Qf4+ 5. Kg2 Qxg4+ 6. Kf2 Qf4+ >> 7. Ke2 Qg4+ 8. Ke3 Qg3+ 9. Kd4 Qd6+ >> 10. Ke4 Qb4+ 11. Kd5 Qxb1 12. h8=Q >> Qa2+ 13. Kd6 Qd2+ 14. Kc7 Qc2+ <HT> >> 16 46.88 -- 1. ... Qe5+ >> time=60:01 cpu=201% mat=2 n=1693306751 fh=99% nps=470k >> ext-> chk=1363197943 cap=274706 pp=267447 1rep=117221890 mate=2380 >> >> predicted=0 nodes=1693306751 evals=7323296 >> endgame tablebase-> probes done=48149 successful=4738 >> hashing-> trans/ref=73% pawn=99% used=14% >> SMP-> split=4869 stop=472 data=13/32 cpu=120:40 elap=60:01 >>Black(1): >> >> >>Fails low @ 46 seconds, and can't resolve it in 59 minutes. :( > >This looks like a bug. That position should never fail low, but always fail >high. > >Either that, or crafty may have found some strange, suicidal attack that >succeeds. If I had to guess, I'd say it'll find something. I did it with 10 minutes at first, and it did this same thing. 59 minutes to resolve a fail low _does_ seem a tad long. Perhaps Bob can help here. I can give it more time, if requested.
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