Author: Dave Gomboc
Date: 09:23:57 05/02/99
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On May 02, 1999 at 09:04:43, blass uri wrote: > >On May 02, 1999 at 08:15:59, Francis Monkman wrote: > >> >>On May 02, 1999 at 05:54:47, blass uri wrote: >> >> >>>Maybe black cannot save itself because after giving white 19.f6 g6 >>>Junior found 20.Nxe6 and the evaluation goes up. >>> >>>Uri >> >>I'm sure 20 Nf3 was right, as Black now has only self-destructive moves >>to make, eg your suggestion 20 ...h5 21 Nxh5 or 20 ...g5 21 Nxg5. King moves >>also lose immediately. I'm pretty sure this is watertight, that's why this is a >>serious question -- a 9-ply (let alone 10 or 11) should find this. > >21.Nxh5 is also good in this line and Junior suggests Rad8 because in this >position it can see that 21...gxh5 is leading to mate against black. > >I think that you need to see more than 9,10,11 plies to see that 21.Nxh5 gxh5 is >losing to Qd2 >For example >21.Nxh5 gxh5 22.Qd2 Rfc8 23.Qh6 Bf8 24.Qg5+ Kh7 25.Qxh5+ Kg8 26.Ng5 Bc5 27.Qh7+ >Kf8 28.Qh8# is a 15 ply line and black has material advantage before the mate. > >It is more than 15 plies from the original position(exactly 21 plies) > >program may see it faster than 21 plies because of some extensions but probably >not in 9,10,11 plies search. > >Uri Amir once said (paraphrased) that Junior's extensions are larger than even Deep Blue's. If that were true for _this particular position_, it would be possible to pick up the loss on an even lower iteration than 9. Dave
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