Author: John Roberts
Date: 06:27:52 01/15/04
Go up one level in this thread
On January 15, 2004 at 09:22:09, John Roberts wrote: >On January 15, 2004 at 09:08:52, George Tsavdaris wrote: > >>On January 15, 2004 at 08:52:00, John Roberts wrote: >> >>>A - B >>> >>>6k1/5p1p/1nB1n1p1/1P6/2pq2P1/3p3P/1P1Q1PK1/R7 w - - 0 1 >>> >>>Analysis by Fritz 8: >>> >>>>37.Qc3 Qd6 38.Re1 Na4 39.Qd2 Kg7 40.Ra1 Nb6 41.Qc3+ Kg8 >>> ² (0.31) Depth: 19/55 17:27:52 32245654kN >>>37.Qc3 Qd6 38.Re1 Na4 39.Qd2 Kg7 40.Ra1 Nb6 41.Kf1 Nd4 >>> ² (0.31) Depth: 20/56 45:57:00 87323100kN >>>37.Qc3 Qd6 38.Re1 Na4 39.Qd2 Kg7 40.Ra1 Nb6 41.Kf1 Nd4 >>> ² (0.28) Depth: 21/74 121:11:44 234690340kN, tb=1 >>>37.Qc3 Qd6 38.Re1 Na4 39.Qd2 Kg7 40.Ra1 Nb6 41.Kf1 Nd4 >>> ² (0.28) Depth: 21/88 318:20:01 625183936kN, tb=16 >>> >>> >>>The clock readings are correct, so why doesn't the last line read 22/88? >>> >>>Pentium4 2.4GHz with 334MB hash, 512MB ram compaq presario. >> >>Wow! 318 hours. Why do you care so much about this position? >> >>I have seen Fritz do this, thousants of times. It shows a move in depth >>X/Y and it shows it again at depth X/Y+K (K>0). Why do you think it's strange? >>Look for example the following at depth 9 and 11. The same happens: >> >>Analysis by Deep Fritz 8: >> >>46...Qf4xd6 47.a2-a4 Qd6-d4 48.d7-d8Q Qd4xd8 49.f2-f4 Qd8-d4 50.Bb5-c4 >> -+ (-3.57) Depth: 7/21 00:00:00 50kN >>46...Qf4xd6 47.a2-a4 Qd6-d4 48.d7-d8Q Qd4xd8 49.f2-f4 Qd8-d4 50.Bb5-c4 Qd4-b2+ >> -+ (-3.57) Depth: 8/21 00:00:00 81kN >>46...Qf4xd6! >> -+ (-3.86) Depth: 9/25 00:00:00 192kN >>46...Qf4xd6 47.a2-a4 Qd6-d4 48.d7-d8Q >> -+ (-4.11) Depth: 9/29 00:00:00 347kN >>46...Qf4xd6 47.Bb5-c4 Qd6xd7 48.f2-f3 Qd7-d4 49.f3xe4 Qd4xe4+ 50.Ke2-d2 Qe4-g2+ >>51.Kd2-e3 Qg2xh3+ 52.Ke3-d4 Bh4-f6+ 53.Kd4-c5 Qh3-e3+ 54.Kc5-b5 Kh7-g6 >> -+ (-4.34) Depth: 10/27 00:00:01 987kN >>46...Qf4xd6! >> -+ (-4.62) Depth: 11/29 00:00:03 1804kN >>46...Qf4xd6! >> -+ (-4.90) Depth: 11/32 00:00:05 2444kN >>46...Qf4xd6 47.Bb5-c4 Qd6xd7 48.f2-f3 Qd7-d4 49.f3xe4 Qd4xe4+ 50.Ke2-d1 Qe4-b1+ >>51.Kd1-d2 Qb1xa2+ 52.Kd2-c3 Qa2-a5+ 53.Kc3-c2 Bh4-g5 54.Rf1-d1 Bg5-f6 55.Bc4xf7 >> -+ (-5.09) Depth: 11/32 00:00:07 3472kN > >Of course this happens, but in your examples, it doesn't circulate through all >the possible candidates before spitting out the 2nd (or 3rd, etc) variation with >the same key move. > >The example I gave, I've never seen anything like it, as part of the 197 hours >were spent examining each candidate once. The only buggy aspect would be that >I've watched DVDs and surfed while this (infinite) analysis is currently >performed, with tablebases enabled. > >A friend asked me to help figure out if the position is won for White, >intellectual curiousity is all. See posts about 2 months ago... Important addendum-depth=22/22, subsequently 21/88!!!!!!!!!!!! which is what it shows NOW, as I type this--it's still chugging along. I swear this is true, I am not losing my mind. Why, oh why?
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