Author: Dann Corbit
Date: 13:16:46 01/19/05
Go up one level in this thread
On January 19, 2005 at 01:16:24, Les Fernandez wrote: >On January 18, 2005 at 21:21:07, Dann Corbit wrote: > >>On January 17, 2005 at 22:10:21, Les Fernandez wrote: >> >>>A few weeks ago I posted these 2 positions and asked if some of you could >>>analyze them and report your findings. As a follow up Dann decided to run these >>>2 positions using 37 different engines to see if it took longer to solve >>>Position #1 vs Position #2. Please review the data and let me hear your >>>thoughts as to what could be causing this to happen. I had to split the charts >>>up since I could not fit them both across the width. The 2 positions lloked at >>>are: (Dann if you see this correct me if these 2 positions are wrong) >>> >>>#1 >>> >>>[D]1b3rk1/pp4pp/2p3n1/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 b - -; >>> >>>#2 >>> >>>[D]1b3rk1/pp4pp/2p3n1/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 b - -; >>> >>> >>>Following is the data: >>> >>> >>>POSITION #1 >>> Sol’n >>>Analyzing engine Total nodes Time(sec) Mate >>>Amyan 11.303.686 36 +M0 >>>Beowulf 13.439.647 34 mate >>>ChestUCI No solution found >>>Crafty-1917 16.841.498 10 -M9 >>>DanChess 966.945 2 mate >>>Delfi 1.914.971 1 mate >>>Dragon_46 7.787.760 10 +M9 >>>Ges >60 >>>Glaurung >60 >>>Glc3034 4.547.343 2 mate >>>GnuChess-507-Net engine trouble >>>GoliathMate engine trouble >>>Gothmog 108.350 0 +M29 >>>GreKo >60 >>>Gromit382 28 +M8 >>>Gully2 >60 >>>Jonny264 >60 >>>Knightx190 84.685.201 49 +M4 >>>Leila-053h 1.859.186 3 +M8 >>>LGNemesis engine trouble >>>List512 863.730 1 +M500 >>>Movei >60 >>>Muse0899b >60 >>>Natwarlal 12.812.697 32 +M9 >>>Nejmet-307 engine trouble >>>Patriot_0172-Lite engine trouble >>>Patzer_361 799.022 2 +M8 >>>Pepito-159 3.708.280 7 +M10 >>>Postmodernist >60 >>>Quark-232-net engine trouble >>>Ruffian_202 engine trouble >>>SmirfMateBeta9 engine trouble >>>SOS-4_Arena engine trouble >>>Tcb0052 >60 >>>Ufim502 174.630 2 +M10 >>>WildCat >60 >>>Yace engine trouble >>> >>> >>>POSITION #2 >>> Sol’n >>>Analyzing engine Total nodes Time(sec) Mate >>>Amyan 2.540.663 8 +M0 >>>Beowulf 6.964.235 17 +M9 >>>ChestUCI No solution found >>>Crafty-1917 9.186.691 5 -M9 >>>DanChess 978.516 2 +M9 >>>Delfi 1.104.162 1 -M8 >>>Dragon_46 3.572.856 4 +M9 >>>Ges 1.655.433 6 +M8 >>>Glaurung >60 >>>Glc3034 2.175.863 1 +M9 >>>GnuChess-507-Net >60 >>>GoliathMate engine trouble >>>Gothmog 31.664 0 +M22 >>>GreKo 6.390.461 11 +M9 >>>Gromit382 0 6 +M8 >>>Gully2 >60 >>>Jonny264 >60 >>>Knightx190 43.799.069 27 +M4 >>>Leila-053h 809.080 1 +M8 >>>LGNemesis engine trouble >>>List512 564.059 1 +M500 >>>Movei 20.420.015 27 +M9 >>>Muse0899b >60 >>>Natwarlal 3.420.414 8 +M9 >>>Nejmet-307 engine trouble >>>Patriot_0172-Lite engine trouble >>>Patzer_361 595.134 2 +M8 >>>Pepito-159 683.162 2 +M9 >>>Postmodernist >60 >>>Quark-232-net 1.789.509 0 +M9 >>>Ruffian_202 engine trouble >>>SmirfMateBeta9 engine trouble >>>SOS-4_Arena 429.121 2 +M12 >>>Tcb0052 47.768.289 27 +M16 >>>Ufim502 89.973 0 +M10 >>>WildCat 139.334 4 +M9 >>>Yace 706.228 0 +M10 >>> >>> >>>I hope splitting the table up dint screw up my data!! >> >>The first thing I looked at was branching factor. At least from the two root >>positions, it is not very different: >>5rk1/ppb3pp/2p3n1/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>5rk1/pp4pp/2pb2n1/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>5rk1/pp4pp/2p3n1/1P1pb3/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p4/P2P2q1/R4NP1/3NBK2/3QRb2 w - - >>5rk1/pp4pp/2p3n1/1P1p4/P2P1bq1/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p4/P2P2q1/R4NP1/3NBKb1/3QR3 w - - >>5rk1/pp4pp/2p3n1/1P1p4/P2P2q1/R4Nbb/3NBK2/3QR3 w - - >>1b3r2/pp3kpp/2p3n1/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1b3r1k/pp4pp/2p3n1/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p5/1P1pn3/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp2n1pp/2p5/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p5/1P1p4/P2P1nq1/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p5/1P1p4/P2P2qn/R4NPb/3NBK2/3QR3 w - - >>1b3rkn/pp4pp/2p5/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1bq2rk1/pp4pp/2p3n1/1P1p4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp1q2pp/2p3n1/1P1p4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p4/P2Pq3/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p1q1n1/1P1p4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p4/P2P1q2/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p1q2/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p2q1/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p4/P2P3q/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p3q/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p4/P2q4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p4/P2P4/R4qPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p4/P2P4/R4Nqb/3NBK2/3QR3 w - - >>1br3k1/pp4pp/2p3n1/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1b1r2k1/pp4pp/2p3n1/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1b2r1k1/pp4pp/2p3n1/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1b4k1/pp4pp/2p3n1/1P1p4/P2P1rq1/R4NPb/3NBK2/3QR3 w - - >>1b4k1/pp4pp/2p3n1/1P1p1r2/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1b4k1/pp4pp/2p2rn1/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1b4k1/pp3rpp/2p3n1/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1b4k1/pp4pp/2p3n1/1P1p4/P2P2q1/R4rPb/3NBK2/3QR3 w - - >>1b3rk1/1p4pp/2p3n1/pP1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - a6 >>1b3rk1/1p4pp/p1p3n1/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/p5pp/1pp3n1/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/6n1/1Ppp4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/6n1/1p1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4p1/2p3n1/1P1p3p/P2P2q1/R4NPb/3NBK2/3QR3 w - h6 >>1b3rk1/pp4p1/2p3np/1P1p4/P2P2q1/R4NPb/3NBK2/3QR3 w - - >> >>verses: >> >>5rk1/ppb3pp/2p3n1/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1bb2rk1/pp4pp/2p3n1/1Pqp4/P2P4/R4NP1/3NBK2/3QR3 w - - >>5rk1/pp4pp/2pb2n1/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp1b2pp/2p3n1/1Pqp4/P2P4/R4NP1/3NBK2/3QR3 w - - >>5rk1/pp4pp/2p3n1/1Pqpb3/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p1b1n1/1Pqp4/P2P4/R4NP1/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1Pqp4/P2P4/R4NP1/3NBK2/3QRb2 w - - >>5rk1/pp4pp/2p3n1/1Pqp4/P2P1b2/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1Pqp1b2/P2P4/R4NP1/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1Pqp4/P2P4/R4NP1/3NBKb1/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1Pqp4/P2P2b1/R4NP1/3NBK2/3QR3 w - - >>5rk1/pp4pp/2p3n1/1Pqp4/P2P4/R4Nbb/3NBK2/3QR3 w - - >>1b3r2/pp3kpp/2p3n1/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3r1k/pp4pp/2p3n1/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p5/1Pqpn3/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp2n1pp/2p5/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p5/1Pqp4/P2P1n2/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p5/1Pqp4/P2P3n/R4NPb/3NBK2/3QR3 w - - >>1b3rkn/pp4pp/2p5/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p4/Pq1P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/1qp3n1/1P1p4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p4/P2P4/R4NPb/3NBK2/2qQR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p4/P2P4/R4NPb/2qNBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p4/P2P4/R1q2NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p4/P1qP4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2pq2n1/1P1p4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp2q1pp/2p3n1/1P1p4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p4/P2P4/q4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1q1p4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/2p3n1/1P1p4/P2q4/R4NPb/3NBK2/3QR3 w - - >>1br3k1/pp4pp/2p3n1/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b1r2k1/pp4pp/2p3n1/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b2r1k1/pp4pp/2p3n1/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b4k1/pp4pp/2p3n1/1Pqp4/P2P1r2/R4NPb/3NBK2/3QR3 w - - >>1b4k1/pp4pp/2p3n1/1Pqp1r2/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b4k1/pp4pp/2p2rn1/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b4k1/pp3rpp/2p3n1/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b4k1/pp4pp/2p3n1/1Pqp4/P2P4/R4rPb/3NBK2/3QR3 w - - >>1b3rk1/1p4pp/2p3n1/pPqp4/P2P4/R4NPb/3NBK2/3QR3 w - a6 >>1b3rk1/1p4pp/p1p3n1/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/p5pp/1pp3n1/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4pp/6n1/1pqp4/P2P4/R4NPb/3NBK2/3QR3 w - - >>1b3rk1/pp4p1/2p3n1/1Pqp3p/P2P4/R4NPb/3NBK2/3QR3 w - h6 >>1b3rk1/pp4p1/2p3np/1Pqp4/P2P4/R4NPb/3NBK2/3QR3 w - - >> >>Are the possible forward positions (about the same). >>It is not at all clear to me why the second position is solved much faster. >>I will examine each of these forward positions and see if that gives any clue. > >Hi Dann <s>, > >Listen are your above positions intended to be white to move?? The 2 positions I >gave above is black to move. Yes, they are intended to be black to move. Those positions are all the possible positions that can be reached in one ply from the two positions that you gave. By moving a chess piece, the number of possible moves that have to be analyzed can easily change, and the number of good looking or bad looking moves can change also.
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