Author: Dann Corbit
Date: 18:37:36 11/03/03
Go up one level in this thread
On November 03, 2003 at 18:03:21, martin fierz wrote: >i'm using ECM98 for testing purposes, and i found two positions with alternate >solutions (i think): > >ECM.018 bm Nxd6 > >[D]r3rbk1/1pq2ppp/2ppbnn1/p3p3/P1PPN3/BP1BPN1P/2Q2PP1/R2R2K1 w - - 0 1 > >intended solution: 1.Nxd6 Bxd6 2.Bxd6 Qxd6 3.dxe5 +- >alternate solution: 1.Bxd6 Bxd6 2.Nxd6 transposes Analyzed with a bit more intensity, the first two are clearly just transpositions: r3rbk1/1pq2ppp/2pNbnn1/p3p3/P1PP4/BP1BPN1P/2Q2PP1/R2R2K1 b - - acd 15; acn 69383883; acs 122; ce -127; pv Bxd6 Bxd6 Qxd6 dxe5 Qe7 exf6 Qxf6 Nd4 Rad8 Nxe6 Rxe6 Bxg6 hxg6 Rxd8+ Qxd8 c5 Qf6 Rd1; r3rbk1/1pq2ppp/2pBbnn1/p3p3/P1PPN3/1P1BPN1P/2Q2PP1/R2R2K1 b - - acd 15; acn 66936386; acs 120; ce -127; pv Bxd6 Nxd6 Qxd6 Bxg6 hxg6 dxe5 Qe7; r3rbk1/1pq2ppp/2ppbnn1/p3p1N1/P1PP4/BP1BPN1P/2Q2PP1/R2R2K1 b - - acd 12; acn 55480990; acs 121; ce -90; pv Bc8 dxe5 dxe5 c5 Be7 Bb2 Nd7 h4 Nxc5 Bxg6 hxg6 Bxe5 Qb6 Rab1; r3rbk1/1pq2ppp/2ppbNn1/p3p3/P1PP4/BP1BPN1P/2Q2PP1/R2R2K1 b - - acd 13; acn 56049494; acs 121; ce -83; pv gxf6 h4 Bg4 dxe5 dxe5 c5 Rad8 Bf5 Bxf5 Qxf5 Bg7 e4 Ne7 Qg4; r3rbk1/1pq2ppp/2ppbnn1/p3p1N1/P1PPN3/BP1BP2P/2Q2PP1/R2R2K1 b - - acd 13; acn 55542204; acs 121; ce -77; pv Nxe4 Nxe6 Rxe6 Bxe4 exd4 Rxd4 Rae8 Bf5 Rf6 Rad1 Re5 Bg4 Rg5 Bb2; r3rbk1/1pq2ppp/2ppbnn1/p3P3/P1P1N3/BP1BPN1P/2Q2PP1/R2R2K1 b - - acd 13; acn 61744351; acs 120; ce -77; pv dxe5 Nxf6+ gxf6 Bxf8 Nxf8 c5 Red8 Rd2 Rd7 Rad1 Rad8 Bf5 Rxd2 Rxd2 Bxf5 Qxf5 Rxd2 Nxd2; r3rbk1/1pq2ppp/2ppbnn1/p2Pp3/P1P1N3/BP1BPN1P/2Q2PP1/R2R2K1 b - - acd 14; acn 56848306; acs 121; ce -71; pv cxd5 Nxf6+ gxf6 cxd5 Qxc2 Bxc2 Bd7 g4 e4 Nd2 f5 Rac1 f6 gxf5 Bxf5 Bb2; r3rbk1/1pq2ppp/2ppbnn1/p3p3/P1PPN3/1P1BPN1P/1BQ2PP1/R2R2K1 b - - acd 13; acn 53901916; acs 120; ce -67; pv Nxe4 Bxe4 exd4 Nxd4 Bd7 Rd2 Re5 Nf5 Re6 Ng3 Ree8 Rad1 Be7 Nf5; Any of these might be viable. Maximum difference is 60 centipawns. >ECM.614 bm Qxf7+ > >[D]5r2/pp1RRrk1/4Qq1p/1PP3p1/8/4B3/1b3P1P/6K1 w - - 0 1 > >intended solution: 1.Qxf7+ Rxf7 2.Rxf7+ Qxf7 3.c6! bc6 4.bc6 Be5 5.Bd4! +- >alternate solution: 1.Rxf7 Rxf7 2.Qxf7+ Qxf7 transposes First two solutions are clearly transpositions. The third choice also appears to win. 5r2/pp1RRQk1/5q1p/1PP3p1/8/4B3/1b3P1P/6K1 b - - acd 18; acn 72608893; acs 121; ce -437; pv Rxf7 Rxf7+ Qxf7 c6 bxc6 bxc6 Be5 Bd4 Bxd4 Rxf7+ Kxf7 c7 Bb6 c8=Q Kf6 Qh8+ Kg6 Qg8+ Kh5 Kg2 Kh4 Qe6 Kh5 Kf3; 5r2/pp1R1Rk1/4Qq1p/1PP3p1/8/4B3/1b3P1P/6K1 b - - acd 16; acn 72280293; acs 120; ce -437; pv Rxf7 Qxf7+ Qxf7 c6 bxc6; 5r2/pp1RRrk1/5q1p/1PP3p1/4Q3/4B3/1b3P1P/6K1 b - - acd 12; acn 69341986; acs 121; ce -358; pv Rxe7 Rxe7+ Rf7 Rxb7 Rxb7 Qxb7+ Kg6 Qxa7 Qf5 Qa4 Be5 c6 Qb1+ Kg2 Qf5; 5r2/pp1RRrk1/5Q1p/1PP3p1/8/4B3/1b3P1P/6K1 b - - acd 15; acn 67452344; acs 121; ce -56; pv Bxf6 Rxf7+ Rxf7 Rd3 a6 bxa6 bxa6 c6 Rc7 Rd6 Be5 Re6 Bf6 Bb6 Rc8 Kg2 Kf7 Rd6; 5r2/pp1RRrk1/3Q1q1p/1PP3p1/8/4B3/1b3P1P/6K1 b - - acd 14; acn 69587017; acs 120; ce -11; pv Qxd6 Rxf7+ Rxf7 Rxd6 Be5 Rd5 Bc7 Rd4 Rf5 Kg2 a5 bxa6 bxa6 Rd7+ Rf7 c6 a5 f3; >am i missing something? is anybody still maintaining ECM98 officially? did i >download an old version of this? is there a newer version? questions, questions >:-) > >i got my version of ECM98 on scott gasch's monsoon site: >http://wannabe.guru.org/scott/hobbies/chess/ECM.EPD > >cheers > martin
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.