Author: Robert Hyatt
Date: 05:56:05 10/18/01
Go up one level in this thread
On October 17, 2001 at 17:57:19, Vincent Diepeveen wrote: >On October 16, 2001 at 14:24:00, Robert Hyatt wrote: > >The King already saw repetitions with 2 rooks 6 years ago >at peanut hardware. > >And yes it simply selects teh right checks in qsearch and searches them >all in a smart way. > >I do also in DIEP move repetition in qsearch, but i do not extend this >case. The King does, otherwise i would also get quickly the draw >score here. > >Life gets a lot easier when you have move repetition also in qsearch. > I find a repetition in a few seconds without any checks in the q-search. However, I don't believe it can see _the repetition_ which is too deep. Crafty claims this is a draw in 3.5 seconds on my quad xeon. I'm suspicious of that result. >>On October 16, 2001 at 11:13:38, John Merlino wrote: >> >>>On October 16, 2001 at 07:58:15, Steffen Jakob wrote: >>> >>>>Hi, >>>> >>>>this is a position from a blitz game Hossa - Sjeng: >>>> >>>>[D]7k/4QP2/7p/6rP/8/1K6/6r1/8 b >>>> >>>>For a human it's obvious that this is a draw. Hossa was rather clueless and >>>>thought that white was winning. Are there any engines which show a draw value at >>>>once (without significant search depth)? >>>> >>>>Greetings, >>>>Steffen. >>> >>>Chessmaster 8000 sees the draw in less than a second: >>> >>>Time Depth Score Positions Moves >>>0:00 1/3 1.18 7319 1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+ >>> 4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2 >>> Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9. >>> Ke3 >>>0:00 2/4 0.95 23824 1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+ >>> 4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2 >>> Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9. >>> Ke3 R2g3+ 10. Ke2 Rg2+ 11. Kf1 >>> Rg1+ 12. Kf2 >>>0:00 3/5 0.00 45109 1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+ >>> 4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2 >>> Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9. >>> Ke3 R2g3+ 10. Ke2 Rg2+ 11. Kf1 >>> Rg1+ 12. Kf2 R1g2+ 13. Ke3 >>>0:01 4/6 0.00 110883 1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+ >>> 4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2 >>> Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9. >>> Ke3 R2g3+ 10. Ke2 Rg2+ 11. Kf1 >>> Rg1+ 12. Kf2 R1g2+ 13. Ke3 >>>0:02 5/7 0.00 246089 1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+ >>> 4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2 >>> Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9. >>> Ke3 R2g3+ 10. Ke2 Rg2+ 11. Kf1 >>> Rg1+ 12. Kf2 R1g2+ 13. Ke3 >>>0:04 6/8 0.00 498686 1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+ >>> 4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2 >>> Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9. >>> Ke3 R2g3+ 10. Ke2 Rg2+ 11. Kf1 >>> Rg1+ 12. Kf2 R1g2+ 13. Ke3 >>>0:08 7/9 0.00 1039196 1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+ >>> 4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2 >>> Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9. >>> Ke3 R2g3+ 10. Ke2 Rg2+ 11. Kf1 >>> Rg1+ 12. Kf2 R1g2+ 13. Ke3 >>>0:16 8/10 0.00 2092486 1...R2g3+ 2. Kc2 Rg2+ 3. Kd3 R2g3+ >>> 4. Kc4 R3g4+ 5. Kc3 Rg3+ 6. Kb2 >>> Rg2+ 7. Kc1 Rg1+ 8. Kd2 R1g2+ 9. >>> Ke3 R2g3+ 10. Ke2 Rg2+ 11. Kf1 >>> Rg1+ 12. Kf2 R1g2+ 13. Ke3 >>> >>>jm >> >> >>It isn't seeing "the draw". It is seeing "a draw". "the draw" is way deep >>here. "the draw" is probably beyond 40 plies deep. I think this is a >>function of one side thinking it wants a draw when it doesn't, and the >>otherside wanting a draw when it shouldn't...
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