Author: Heiner Marxen
Date: 14:32:28 10/16/01
Go up one level in this thread
On October 15, 2001 at 14:41:11, Roy Eassa wrote: >On October 14, 2001 at 11:28:53, Terry McCracken wrote: > >>The position is missing a couple of pawns, one crucial! >> >>[D]r1b2r2/1p1pNpkp/3pn1p1/2pN3P/2PnP3/q3QP2/p3BKP1/1R5R w - - bm Qh6+; >> >> >>So the answer is *only* Qh6+!! >> >>Terry > > >Complete line: > >1.Qh6+!! Kxh6 2.hxg6+ Kg5 > > [2...Kg7 3.Rxh7#] > >3.Rh5+!! Kxh5 4.f4+! Qf3+ > > [4...Nxe2 5.Nf6+! Kh6 6.Rh1+ Qh3 7.Rxh3+ Kg7 8.Ne8+! Rxe8 9.Rxh7+ Kf6 > (9...Kf8 10.Rxf7#) > 10.Rxf7#] > >5.Bxf3+ Nxf3 6.Rh1+ Nh4 > > [6...Kg4 7.gxf3#] > >7.Nf6+ Kh6 8.Rxh4+ Kg7 9.Ne8+! Rxe8 10.Rxh7+ Kf6 > > [10...Kf8 11.Rxf7#] > >11.Rxf7# Chest confirms that. After 23.4 hours (K7/600, 350 MB hash) it delivers: PV: Qh6+ Kxh6 hxg6+ Kg5 Rh5+ Kxh5 f4+ Qf3+ Bxf3+ Nxf3 Nf6+ Kh6 Rh1+ Nh4 Rxh4+ Kg7 Ne8+ Rxe8 Rxh7+ Kf6 Rxf7# BTW, to complete your above, add 1...Kh8 2.Qxh7+ Kxh7 3.hxg6+ Kg7 4.Rh7# For the curious, some timing info: # 1 0.00s 0kN 0.87 1- 0 # 2 0.00s 0kN 1.00 1- 0 # 3 0.00s 1kN [ 11.84] 0.96 55- 0 # 4 0.08s 5kN [ 6.22] 1.04 685- 0 # 5 0.62s [ 7.75] 31kN [ 6.56] 1.23 5247- 0 # 6 3.45s [ 5.56] 185kN [ 5.99] 1.51 33320- 0 # 7 22.23s [ 6.44] 1229kN [ 6.64] 1.78 218722- 0 # 8 145.38s [ 6.54] 8512kN [ 6.93] 2.09 1442337- 8 # 9 947.74s [ 6.52] 54865kN [ 6.45] 2.50 9288797- 1249692 # 10 8227.65s [ 8.68] 479554kN [ 8.74] 2.60 79013461- 70265560 # 11 83957.78s [ 10.20] 5216112kN [ 10.88] 2.78 771061462- 762313561 Cheers, Heiner
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