Author: Robert Hyatt
Date: 19:05:29 03/08/06
Go up one level in this thread
On March 08, 2006 at 16:29:31, Stuart Cracraft wrote: >On March 07, 2006 at 21:51:03, Robert Hyatt wrote: > >>On March 07, 2006 at 19:19:05, Stuart Cracraft wrote: >> >>>On March 07, 2006 at 15:49:27, Robert Hyatt wrote: >>> >>>>On March 07, 2006 at 02:27:24, Tony Werten wrote: >>>> >>>>>On March 07, 2006 at 00:35:43, Stuart Cracraft wrote: >>>>> >>>>>>On March 07, 2006 at 00:25:46, Stuart Cracraft wrote: >>>>>> >>>>>>>On March 06, 2006 at 22:50:44, Dann Corbit wrote: >>>>>>> >>>>>>>>Looks like king safety to me: >>>>>>>>[D] r4rk1/1p2ppbp/p2pbnp1/q7/3BPPP1/2N2B2/PPP4P/R2Q1RK1 b - - bm Bxg4 >>>>>>> >>>>>>>An extended search could not crack the 10th ply aspiration search fail high >>>>>>>on this position. I do not know what was about to happen, only that it >>>>>>>would take a long time. >>>>>>> >>>>>>>.sd 99 >>>>>>>maxdepth = 99 maxtime = 9999999 timed = 0 >>>>>>>.ts >>>>>>>position file? [wac.epd] retry.epd >>>>>>># of test positions to test? 1 >>>>>>>maxtime = 9999999 >>>>>>>Interrupt current ply and return move at timeout >>>>>>>Testsuite: Tests/retry.epd 1 positions >>>>>>>*** Problem Solution(s): Bxg4 (bm) >>>>>>>[D] r4rk1/1p2ppbp/p2pbnp1/q7/3BPPP1/2N2B2/PPP4P/R2Q1RK1 b - - bm Bxg4 >>>>>>>*** Problem Solution(s): Bxg4 (bm) >>>>>>>BR ** -- ** -- BR BK ** >>>>>>>** BP ** -- BP BP BB BP >>>>>>>BP ** -- BP BB BN BP ** >>>>>>>BQ -- ** -- ** -- ** -- >>>>>>>-- ** -- WB WP WP WP ** >>>>>>>** -- WN -- ** WB ** -- >>>>>>>WP WP WP ** -- ** -- WP >>>>>>>WR -- ** WQ ** WR WK -- >>>>>>>mv 1 stage 0, black to move, computer plays black >>>>>>>hash=5076cc275e393397 >>>>>>>pawnhash=3d032756da421438 >>>>>>>0 0 0 0 0 0 >>>>>>>Alpha=999 Beta=1800 Maxdepth=99 MaxTime=9999999 xboard=0 >>>>>>>Itr/Max Mv Score Time Nodes PV >>>>>>> 1/ 5 f6g4 1400 0.00 57 f6g4 >>>>>>> 2/10 f6g4 1347 0.01 385 f6g4 f3e2 g7d4 d1d4 >>>>>>> 3/10< f6g4 946 0.03 1959 f6g4 f3e2 g7d4 d1d4 f7f6 >>>>>>> 3/10 f6g4 945 0.05 2925 f6g4 d4g7 g8g7 f3g4 >>>>>>> 4/12< f6g4 544 0.10 6880 f6g4 d4g7 g8g7 f3g4 f7f6 >>>>>>> 4/15 a5d8 -241 0.25 17921 a5d8 g1g2 >>>>>>> 5/21 e6c4 -35 0.46 33988 e6c4 f3e2 a5c7 >>>>>>> 6/21 h7h5 -40 1.30 101881 h7h5 g4g5 f6d7 d4g7 g8g7 >>>>>>> 7/21 a5b4 -104 2.96 235870 a5b4 g4g5 f6h5 d4g7 h5g7 a1b1 a8c8 >>>>>>> 8/22 a5b4 -145 6.09 498480 a5b4 a2a3 b4b2 c3d5 b2b5 d5e7 g8h8 a1b1 >>>>>>> 9/24 e6c4 -79 11.79 991796 e6c4 f1f2 e7e5 d4e3 a5d8 a2a4 >>>>>>>10/24> e6c4 321 30.18 2576527 e6c4 f1f2 e7e5 d4e3 a5b4 g4g5 f6d7 f4e5 g7e5 >>>>>>>10/ >>>>>> >>>>>>The search kept going and did find the move but it took almost 15 minutes. >>>>>> >>>>>>position file? [wac.epd] retry.epd >>>>>># of test positions to test? 1 >>>>>>maxtime = 9999999 >>>>>>Interrupt current ply and return move at timeout >>>>>>Testsuite: Tests/retry.epd 1 positions >>>>>>*** Problem Solution(s): Bxg4 (bm) >>>>>>[D] r4rk1/1p2ppbp/p2pbnp1/q7/3BPPP1/2N2B2/PPP4P/R2Q1RK1 b - - bm Bxg4 >>>>>>*** Problem Solution(s): Bxg4 (bm) >>>>>>BR ** -- ** -- BR BK ** >>>>>>** BP ** -- BP BP BB BP >>>>>>BP ** -- BP BB BN BP ** >>>>>>BQ -- ** -- ** -- ** -- >>>>>>-- ** -- WB WP WP WP ** >>>>>>** -- WN -- ** WB ** -- >>>>>>WP WP WP ** -- ** -- WP >>>>>>WR -- ** WQ ** WR WK -- >>>>>>mv 1 stage 0, black to move, computer plays black >>>>>>hash=5076cc275e393397 >>>>>>pawnhash=3d032756da421438 >>>>>>0 0 0 0 0 0 >>>>>>Alpha=999 Beta=1800 Maxdepth=99 MaxTime=9999999 xboard=0 >>>>>>Itr/Max Mv Score Time Nodes PV >>>>>> 1/ 5 f6g4 1400 0.00 57 f6g4 >>>>>> 2/10 f6g4 1347 0.01 385 f6g4 f3e2 g7d4 d1d4 >>>>>> 3/10< f6g4 946 0.03 1959 f6g4 f3e2 g7d4 d1d4 f7f6 >>>>>> 3/10 f6g4 945 0.05 2925 f6g4 d4g7 g8g7 f3g4 >>>>>> 4/12< f6g4 544 0.10 6880 f6g4 d4g7 g8g7 f3g4 f7f6 >>>>>> 4/15 a5d8 -241 0.25 17921 a5d8 g1g2 >>>>>> 5/21 e6c4 -35 0.46 33988 e6c4 f3e2 a5c7 >>>>>> 6/21 h7h5 -40 1.30 101881 h7h5 g4g5 f6d7 d4g7 g8g7 >>>>>> 7/21 a5b4 -104 2.96 235870 a5b4 g4g5 f6h5 d4g7 h5g7 a1b1 a8c8 >>>>>> 8/22 a5b4 -145 6.09 498480 a5b4 a2a3 b4b2 c3d5 b2b5 d5e7 g8h8 a1b1 >>>>>> 9/24 e6c4 -79 11.79 991796 e6c4 f1f2 e7e5 d4e3 a5d8 a2a4 >>>>>>10/24> e6c4 321 30.18 2576527 e6c4 f1f2 e7e5 d4e3 a5b4 g4g5 f6d7 f4e5 g7e5 >>>>>>10/25 e6g4 1344 863.20 4198040 e6g4 e4e5 d6e5 f4e5 g4f3 d1f3 a5b4 f3e3 f6g4 >>>>>>11/26 e6g4 1032 889.10 6506793 e6g4 e4e5 d6e5 f4e5 g4f3 d1f3 a5b4 a1d1 f6h5 >>>>>>b2b3 >>>>>>12/30 e6g4 1261 957.00 12603674 e6g4 f3g4 f6g4 c3d5 g7d4 d1d4 a8e8 h2h3 g4h6 >>>>>>b2b4 a5a3 >>>>>>13/32 e6g4 1285 1110.45 26675821 e6g4 f3g4 f6g4 c3d5 g7d4 d1d4 a8e8 h2h3 g4f6 >>>>>>d5f6 e7f6 d4d6 e8e4 b >>>>>>2b4 f8d8 >>>>>>14/ >>>>> >>>>>My guess is something is wrong with your move ordering. The failhigh on ply 10 >>>>>took 30 times the previous. That should not happen. >>>> >>>>There's more to it. Look at the node counts. A factor of less than 2X more >>>>nodes, which suggests that the machine is doing other things which makes time >>>>interpretation meaningless on such tests.... >>>> >>>> >>> >>>This last paragraph went completely over my head. I see the node counts >>>not going up 2x on between iteration. But "makes time interpretation >>>meaningless" -- can you elaborate? >> >> >>Time to fail high was 30x, but node count was only 2x. Where did the extra 15X >>time go if not searching more nodes? >> >>Something is fishy, most likely the cpu was not 100% busy playing chess, but was >>running something else also... > > >Very likely - the box is not dedicated. > >Thanks. You can't test on a box like that and draw _any_ conclusions about the time taken to find something.
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