Author: Dann Corbit
Date: 08:00:53 02/12/99
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On February 11, 1999 at 22:29:37, Jeremiah Penery wrote: >On February 11, 1999 at 17:14:23, Dann Corbit wrote: > >>This is a subset of LCT II, which I find questionable. >> >>I wonder if you kind persons might run these at high intensity on your chess >>machines. I have only run these at 12 minutes to one hour so far, and I get >>different answers than LCT II says are correct. If I could get the input from >>some different chess engines, it would be very helpful. >> >>You will probably have to fix the word wrapping before you feed these to a >>hungry chess engine. >> >>It would probably be very good to examine the original source and see what the >>author was thinking for these positions. What book do they come out of? > >My Crafty is solving only this one at 10 min/pos. Also a question about the >other one. > >>3r1bk1/p4ppp/Qp2p3/8/1P1B4/Pq2P1P1/2r2P1P/R3R1K1 b - - ; acd 13 ; acn 110858121 >>; ce 15 ; bm e5 ; pm Rd7 ; id "LCTII.POS.06" ; pv Rd7 Re2 f6 Rxc2 Qxc2 f4 Rc7 >>Qf1 Be7 > >12 6:42 0.25 1. ... e5 2. Bxe5 Rdd2 3. Qf1 Qd5 4. > Bf4 Qf3 5. Rec1 Qxf2+ 6. Qxf2 Rxf2 > 7. Rxc2 Rxc2 8. Rd1 Be7 >12-> 7:32 0.25 1. ... e5 2. Bxe5 Rdd2 3. Qf1 Qd5 4. > Bf4 Qf3 5. Rec1 Qxf2+ 6. Qxf2 Rxf2 > 7. Rxc2 Rxc2 8. Rd1 Be7 > >>r3k2r/3bbp1p/p1nppp2/5P2/1p1NP3/5NP1/PPPK3P/3R1B1R b kq - ; acd 13 ; acn >>88229709 ; ce -26 ; bm Bf8 ; pm Nxd4 ; id "LCTII.POS.10" ; pv Ne5 Be2 O-O Rhe1 >>Rfc8 Kc1 Kg7 Kb1 Nxf3 > >Question about this one: What is the 'pm' field? Here's my output for it >(first and last plies, total search time 10 minutes). It liked the 'pm' the >whole time: From the PGN Standard: 16.2.5.18: Opcode "pm": predicted move The "pm" opcode is used to provide a single predicted move for the indicated position. It has exactly one operand, a move playable from the position. This move is judged by the EPD writer to represent the best move available to the active player. If a non-empty "pv" (predicted variation) line of play is also present in the same EPD record, the first move of the predicted variation is the same as the predicted move. The "pm" opcode is intended for use as a general "display hint" mechanism. > > 6 0.12 -0.14 1. ... Nxd4 2. Nxd4 e5 3. Nf3 d5 4. exd5 Bxf5 ><snip> >13 2:15 -0.16 1. ... Nxd4 2. Nxd4 e5 3. Nb3 d5 4. exd5 Bxf5 5. Bd3 Bh3 > 6. Rhe1 Bd6 7. Kc1 Bg4 8. Rd2
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