Author: George Tsavdaris
Date: 09:44:44 01/01/04
Go up one level in this thread
On January 01, 2004 at 11:17:32, Brian Katz wrote: >I have found that Fritz 8 (8.0.0.8 and 8.0.0.23)has trouble solving some >positions that other engines solve in a matter of seconds. Such is the case with >the recent position: > >8/8/K6p/6p1/8/8/k5PP/8 w > >Of course Tablebases are needed to find the mate in 29, which is the case with >Ruffian, Yace and Crafty 19.06. Hiarcs finds it in 30. > >Fritz 8.0.0.8 did not find it at all as yet. Fritz 8.0.0.23 just found it as I >am sending this post after 00:08:26, but it shows mate in 31 instead. >Once Fritz 8 finds a mate, it seems to end it's search whereas, some other >engines continue to search and find quicker mates. > >Any and all opinions welcomed. >Brian Fritz 8 has no trouble at all to solve this position. On a PIV-1500MHz with 48 MB hash tables and all 3-4 and some 5 piece endgame tablebases it finds the winning move instantly and shows it is a winning move (+5) in 5 seconds. Fritz 8 is not a mate solver, but a chess player, so if it isn't able to anounce a mate in x, this is not bad. Analysis by Fritz 8.00.8: 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c3 3.Kb5-c5 Kc3-d3 4.Kc5-d5 = (0.06) Depth: 7/9 00:00:00 2kN, tb=2 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c3 3.Kb5-c5 Kc3-d3 4.Kc5-d5 Kd3-e3 = (0.00) Depth: 8/10 00:00:00 4kN, tb=5 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c3 3.Kb5-c5 Kc3-d3 4.Kc5-d5 Kd3-e3 5.Kd5-e5 = (0.06) Depth: 9/10 00:00:00 7kN, tb=20 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c3 3.Kb5-c5 Kc3-d3 4.Kc5-d5 Kd3-e3 5.Kd5-e5 Ke3-f3 = (0.00) Depth: 10/12 00:00:00 11kN, tb=42 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c3 3.Kb5-c5 Kc3-d3 4.Kc5-d5 Kd3-e3 5.Kd5-e5 Ke3-f3 6.Ke5-f5 = (-0.06) Depth: 11/12 00:00:00 17kN, tb=93 1.Ka6-b5! = (-0.03) Depth: 11/14 00:00:00 22kN, tb=102 1.Ka6-b5! = (0.13) Depth: 11/14 00:00:00 26kN, tb=111 1.Ka6-b5 Ka2-b3 2.Kb5-c5 Kb3-c3 3.Kc5-d5 Kc3-d3 4.Kd5-e5 Kd3-e3 5.Ke5-f5 Ke3-f2 6.g2-g4 Kf2-f3 7.h2-h3 = (0.03) Depth: 12/15 00:00:00 42kN, tb=196 1.Ka6-b5 Ka2-b3 2.Kb5-c5 Kb3-c3 3.Kc5-d5 Kc3-d3 4.Kd5-e5 Kd3-e3 5.g2-g4 Ke3-f2 6.Ke5-f6 Kf2-f3 7.h2-h3 = (-0.03) Depth: 13/17 00:00:00 60kN, tb=340 1.Ka6-b5 Ka2-b2 2.Kb5-c5 Kb2-c2 3.Kc5-d5 Kc2-d2 4.Kd5-e5 Kd2-e2 5.Ke5-f6 g5-g4 6.Kf6-f5 Ke2-f2 7.Kf5xg4 Kf2xg2 = (-0.09) Depth: 14/19 00:00:00 122kN, tb=984 1.g2-g4! = (-0.06) Depth: 14/19 00:00:00 127kN, tb=1161 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c3 3.Kb5-c5 Kc3-d3 4.Kc5-d5 Kd3-e3 5.Kd5-e5 Ke3-f2 6.Ke5-f6 Kf2-g2 7.Kf6-g6 Kg2-h3 8.Kg6-h5 = (-0.06) Depth: 15/18 00:00:00 135kN, tb=1339 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c3 3.Kb5-c5 Kc3-d3 4.Kc5-d5 Kd3-e3 5.Kd5-e5 Ke3-f2 6.Ke5-f6 Kf2-f3 7.Kf6-f5 = (0.19) Depth: 16/18 00:00:00 166kN, tb=2328 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c3 3.Kb5-c5 Kc3-d3 4.Kc5-d5 Kd3-e3 5.Kd5-e5 Ke3-f2 6.Ke5-f6 Kf2-f3 7.Kf6-f5 = (0.22) Depth: 17/20 00:00:01 199kN, tb=4288 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c3 3.Kb5-c5 Kc3-d3 4.Kc5-d5 Kd3-e3 5.Kd5-e5 Ke3-f2 6.Ke5-f6 Kf2-f3 7.Kf6-f5 = (0.22) Depth: 18/21 00:00:01 315kN, tb=45049 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c3 3.Kb5-c5 Kc3-d3 4.Kc5-d5 Kd3-e3 5.Kd5-e5 Ke3-f2 6.Ke5-f6 Kf2-e3 7.Kf6-g6 Ke3-f4 8.Kg6-h5 Kf4-f3 9.h2-h3 Kf3-g3 10.Kh5xh6 Kg3-h4 = (0.19) Depth: 19/22 00:00:02 594kN, tb=153924 1.g2-g4! ² (0.47) Depth: 20/22 00:00:03 790kN, tb=223933 1.g2-g4! ± (0.75) Depth: 20/22 00:00:03 810kN, tb=224938 1.g2-g4! ± (1.31) Depth: 20/22 00:00:03 864kN, tb=227443 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c3 3.Kb5-c5 Kc3-d3 4.Kc5-d5 Kd3-e3 5.Kd5-e5 Ke3-f2 6.Ke5-f6 Kf2-f3 7.Kf6-f5 +- (5.34) Depth: 20/27 00:00:05 1049kN, tb=270190 1.g2-g4! +- (5.81) Depth: 21/21 00:00:06 1349kN, tb=386032 1.g2-g4! +- (6.09) Depth: 21/21 00:00:06 1396kN, tb=392180 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c3 3.Kb5-c5 Kc3-d3 4.Kc5-d5 Kd3-e3 5.Kd5-e5 Ke3-f2 +- (6.19) Depth: 21/24 00:00:06 1541kN, tb=438270 1.g2-g4-- +- (5.91) Depth: 22/25 00:00:07 1913kN, tb=590447 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c3 3.Kb5-c5 Kc3-d3 4.Kc5-d5 Kd3-e2 5.Kd5-e6 Ke2-e3 6.Ke6-e5 +- (5.34) Depth: 22/25 00:00:08 2098kN, tb=635312 1.g2-g4! +- (6.19) Depth: 23/23 00:00:10 2463kN, tb=786841 1.g2-g4-- +- (5.91) Depth: 24/28 00:00:12 3201kN, tb=1046890 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c3 3.Kb5-c5 Kc3-d2 4.Kc5-d6 Kd2-d3 5.Kd6-d5 Kd3-e2 +- (5.34) Depth: 24/28 00:00:16 5142kN, tb=1329038 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c2 3.Kb5-c6 Kc2-c3 4.Kc6-c5 +- (5.34) Depth: 25/28 00:00:23 8550kN, tb=2170800 1.g2-g4 Ka2-b3 2.Ka6-b5 Kb3-c2 3.Kb5-c6 Kc2-c3 4.Kc6-c5 +- (5.34) Depth: 26/28 00:00:25 9153kN, tb=2429594
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