Author: blass uri
Date: 18:08:13 07/07/98
Go up one level in this thread
On July 07, 1998 at 18:21:52, Bruce Moreland wrote: >Someone posted this position, as I challenge, I believe, to Diep. I don't think >anyone responded to it. I posted this position because Vincent Diepeveen posted positions Diep solved and the programs I have could not solve them in reasonable time. I was interested to know if practically Diep can help me in analyzing positions more than other programs so I posted a position I expected to be in my game to check it. > >I started my program thinking about this, figuring I'd let it go a day or two, >but with the (US) holiday weekend, plus the technical difficulties that we had >here, I let it go for a while longer than I expected. > >Does anyone know what the real point is of 1. ... d6 ? I think black gets initiative for the pawn. I thought about this position before I played the move Nc6 to e5 This position could be in the game if my opponent answered Nc3 to b5 Junior4.6 evaluated this move as best and evaluate the answer Nc3 to b5 as best Junior4.6 evaluated the position as better for black(probably because it evaluated that the white king is not safe) but when I followed the main line I saw that my computer evaluate white position as better and I did not like it (I was black). I thought about alternatives to Nc6-e5 but I did not find a good alternative so I decided to give Junior4.6 a very long time to look for the best move after Ne5 Nb5 and after a very long time it understood white is better and then after near 50 hours on pentium200MMX it found d6 with 0.01 pawn advantage for black. I analyzed the position after d6 and found that black position does not get worse like after other possibilities so I decided to believe it is the best move. I do not think I could think about this idea without the computer because I know it is a good idea to put a white knight at d6 so to sacrifice a pawn and to give the white knight the square d6 is against what I believe. in the end my opponent decided not to play Nb5 and the game was drawn. uri > >bruce > >----------------- > >r1bqr1k1/pp1p1ppp/5n2/1N2n3/2P1PB2/6P1/PP1Q1K1P/4RB1R b - - 0 1 > > a b c d e f g h > +---+---+---+---+---+---+---+---+ >8 | r |///| b |/q/| r |///| k |///| 8 > +---+---+---+---+---+---+---+---+ >7 |/p/| p |///| p |///| p |/p/| p | 7 > +---+---+---+---+---+---+---+---+ >6 | |///| |///| |/n/| |///| 6 > +---+---+---+---+---+---+---+---+ >5 |///| N |///| |/n/| |///| | 5 > +---+---+---+---+---+---+---+---+ >4 | |///| P |///| P |/B/| |///| 4 > +---+---+---+---+---+---+---+---+ >3 |///| |///| |///| |/P/| | 3 > +---+---+---+---+---+---+---+---+ >2 | P |/P/| |/Q/| |/K/| |/P/| 2 > +---+---+---+---+---+---+---+---+ >1 |///| |///| |/R/| B |///| R | 1 > +---+---+---+---+---+---+---+---+ > a b c d e f g h > >Times on a P2/300 > >PV 00:00:30.840 8 -81 [wrong] d5 >PV 00:00:34.283 8 -80 [wrong] d5 exd5 Neg4+ Kf3 Rxe1 Qxe1 >PV 00:01:00.815 9 -50 [wrong] d5 exd5 Bf5 Nc3 Neg4+ Kg2 Ne4 Rxe4 Bxe4+ Nxe4 >Rxe4 Bd3 Re8 d6 >PV 00:02:55.182 10 -59 [wrong] d5 exd5 Bf5 Nc3 Neg4+ Kg2 Ne4 Rxe4 Bxe4+ Nxe4 >Rxe4 Bd3 Re8 Qc2 Nf6 Rf1 >PV 00:11:33.407 11 -52 [wrong] d5 cxd5 Neg4+ Kf3 Nxd5 Rd1 Nge3 Bxe3 Bg4+ Kxg4 >Nxe3+ Qxe3 Qxd1+ Kh3 a6 Nd4 Rad8 Nf5 >PV 00:28:02.555 12 -63 [wrong] d5 cxd5 Neg4+ Kf3 Nxd5 Rd1 Ngf6 exd5 Bg4+ Kg2 >Bxd1 Qxd1 Nxd5 Bc4 Nxf4+ gxf4 Qf6 Qd4 Qg6+ Kf2 >PV 01:10:42.221 12 -60 [wrong] a6 >PV 01:11:18.344 12 -63 [wrong] d5 cxd5 Neg4+ Kf3 Nxd5 Rd1 Ngf6 exd5 Bg4+ Kg2 >Bxd1 Qxd1 Nxd5 Bc4 Nxf4+ gxf4 Qf6 Qd4 Qg6+ Kf2 >PV 01:11:18.344 12 -61 [wrong] a6 Nd6 Qb6+ Kg2 Re6 Bxe5 Rxe5 c5 Rxc5 Bc4 Kf8 >Rhf1 Qc7 Qd4 Rc6 e5 >PV 01:16:55.406 13 -72 [wrong] a6 Nd6 Qb6+ Kg2 Re6 Bxe5 Rxe5 c5 Rxc5 Bc4 Rc6 >e5 Rxc4 Nxc4 Qc6+ Kg1 Qxc4 exf6 >PV 01:38:42.000 13 -69 [wrong] d5 >PV 02:39:09.082 13 -61 [wrong] d5 exd5 Bf5 Nc3 Neg4+ Kg2 Ne4 Qd4 Nxc3 Qxc3 >Be4+ Rxe4 Rxe4 Qf3 Nf6 Bd3 Re8 d6 Qb6 b3 >PV 10:00:21.924 14 -72 [wrong] d5 cxd5 Neg4+ Kf3 Nxd5 exd5 Rxe1 Qxe1 Qxd5+ >Qe4 Qxe4+ Kxe4 Nf2+ Ke3 Nxh1 Nc7 Rb8 Nd5 Ra8 Bg2 Nxg3 Bxg3 Kf8 Ke4 >PV 20:52:24.463 14 -69 [right] d6 >PV 24:55:45.681 14 -55 [right] d6 Qxd6 Bd7 Nc7 Neg4+ Kf3 Rxe4 Rxe4 Nxe4 Kxe4 >Bc6+ Kd4 Qxd6+ Bxd6 Rd8 Nd5 Rxd6 Bg2 Re6 Bh3 f5 Rf1 Re4+ Kc5 >PV 32:47:40.034 15 -55 [right] d6 Qxd6 Bd7 Nc7 Neg4+ Kf3 Rxe4 Rxe4 Nxe4 Kxe4 >Bc6+ Kd4 Qxd6+ Bxd6 Rd8 Nd5 Rxd6 Bg2 Re6 h3 Re2 Bf3 Rd2+ Kc3 Bxd5 >PV 97:40:55.887 16 -48 [right] d6 Qxd6 Bd7 Nc7 Neg4+ Kf3 Rxe4 Rxe4 Nxe4 Kxe4 >Bc6+ Kd4 Qxd6+ Bxd6 Rd8 Nd5 Rxd6 Bg2 Re6 a3 f5 h3 Nf6 Rf1 Bxd5 Bxd5 Nxd5
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