Author: Dann Corbit
Date: 18:21:07 01/18/05
Go up one level in this thread
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.
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