Author: James Robertson
Date: 10:34:57 11/09/98
Go up one level in this thread
On November 09, 1998 at 02:04:27, Jeremiah Penery wrote: >On November 07, 1998 at 15:18:26, James Robertson wrote: > >>On November 07, 1998 at 01:14:10, blass uri wrote: >> >>> >>>On November 06, 1998 at 20:07:39, James Robertson wrote: >>> >>>>On November 06, 1998 at 14:31:41, blass uri wrote: >>>> >>>>> >>>>>On November 06, 1998 at 13:47:22, blass uri wrote: >>>>> >>>>>> >>>>>>On November 06, 1998 at 01:43:43, Jeremiah Penery wrote: >>>>>> >>>>>>>On November 06, 1998 at 00:26:37, James Robertson wrote: >>>>>>> >>>>>>>>The following position was reachied in a blitz game between Exchess 2.49 and >>>>>>>>SSEChess 2.01: >>>>>>>> >>>>>>>>4rrk1/ppp2pp1/2qp3p/2n5/2P1PQ1B/3P4/P1P3PP/R4RK1 w - - >>>>>>>> >>>>>>>>Exchess played Qf2 and won about 30 moves later, but I thought that maybe Bf6 >>>>>>>>would be an irresistible sacrifice for a computer program. >>>>>>>> >>>>>>>>After 1. Bf6 gxf6 2. Qxh6, I don't see any way Black can win: >>>>>>>> >>>>>>>>2. ... Nd5 3. Rf3 Ng5 4. Rg3 d5 5. h4 Qd6 6. Kh2 Qe5 7. hxg6 fxg6 8. Qxg6+ Qxg6 >>>>>>>>9. Rxg6+ Kh7 10. cxd5 (evaluated -2.15 for Black by Crafty) >>>>>>>> >>>>>>>>2. ... Nd7 3. Rf3 (And Black can't stop Rg3) >>>>>>> >>>>>>>I ran Crafty on it. Here's what I got after 1.Bf6 gxf6 2.Qxh6: >>>>>>> >>>>>>>2. ... Ne6 3. Rab1 Qc5+ 4. Rf2 Nd4 5. Rxb7 Rb8 6. Rxb8 Rxb8 7. g4 Qg5 8. Qh3 >>>>>>>Rb1+ 9. Kg2 Rb2 (Eval: -1.6 for white) >>>>>> >>>>>>3.Rab1 is not good and Junior5 prefered 3.Rf3 with the idea to play after >>>>>>3...Ng5 4.Kh1 >>>>> >>>>>Junior5 prefer after some minutes 4.Rf4 and white is winning >>>>>I think that 2...Ne6 is a losing mistake for black >>>> >>>>I can't think of any other move for Black other than 2. ... Ne6. Is there a >>>>better move? >>>> >>>>James >>> >>> >>>2...Nxe4(Junior5's move) is better and after it 3.dxe4 Qc5+ Kh1 Qg5 is one >>>option. >>> >>>Uri >> >>Ok..... That makes sense. White is left with destroyed pawns, and his attack is >>over. >> >>James > >Last couple plies run from Crafty > > 16-> 1331:21 0.45 2. ... Nxe4 3. dxe4 Rxe4 4. Rxf6 Rg4 > 5. Rf2 Qxc4 6. Qe3 a6 7. c3 d5 8. Re1 > Re4 9. Qg5+ Kh7 10. Ref1 Qc5 11. Qh5+ > Kg7 12. Qg5+ Kh8 > 17-> 3294:19 0.41 2. ... Nxe4 3. dxe4 Rxe4 4. Qxf6 Qc5+ > 5. Kh1 Qe5 6. Qf2 Rxc4 7. Rae1 Qg5 > 8. Re2 c5 9. Rb1 b5 10. Rbe1 Rf4 11. > Qe3 > >White is still winning, but not by a lot. I'll let it run some more, to see >what happens (if anything). > >Jeremiah Ok..... blass uri said that Junior 5 came to the same conclusion, that 2. ... Nxe4 was the only way to survive. James
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.