Author: Uri Blass
Date: 04:02:04 09/29/02
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On September 29, 2002 at 06:44:19, Uri Blass wrote: >On September 29, 2002 at 05:55:57, Jeroen Noomen wrote: > >>Yesterday in the Dutch competition I reached the following position (Can >>somebody make a diagram? I still don't know how this works!): >> >>White: Kh1,Qc2,Rb1,Rf1,Bc3,Bg2,Ng3, pawns a2,b4,d4,e4,f5,h2 >>Black: Kh8,Qd6,Re8,Ra8,Bg7,Bf7,Ng8, pawns a7,b7,c6,f6,g5,h6 >> >>I managed to crash through with the break 26.e5! dxe5 27.f6! and white was >>winning. Especially nice is the line 27. ... Bxf6 28.Ne4 Bg6 29.dxe5 Bxe4 >>30.Qxe4 Qc7 31.exf6! Rxe4 32.f7+. >> >>My opponent chose another way: 27. ... Bf8 28.dxe5 Rxe5 29.Bxe5 Qxe5 30.Rbe1 Qd6 >>31.Qf5 Qxb4? 32.Be4 1-0 >> >>Of course I am interested how much time today's programs take to find 26 e5! and >>27 f6! So please post your results! >> >>Jeroen > > > >You start with line 8 >You start by a8 >there is a black rook there so you write small r >(white pieces get big letters) >b8,c8,d8 have nothing. >The number of this squares is 3 so you write 3 >e8 has black rook on it so you write r >f8 has nothing(1 square) so you write 1 >g8 has black knight so you write n >h8 has black king so you write k >You write / because there are more lines. > >result for line 8 is r3r1nk/ >by similiar way you calculate results for line 7,6,5,4,3,2,1 >pp3bb1/2pq1p1p/5Pp1/1P1PP3/2B3N1/P1Q3BP/1R3R1K >you add w - - 0 1 and get the following string >(w is for white to move) > >I added [D] behind it to get a diagram. > >[D]r3r1nk/pp3bb1/2pq1p1p/5Pp1/1P1PP3/2B3N1/P1Q3BP/1R3R1K w - - 0 1 > >26.e5 is the move to find. > >After 26.e5 dxe5 27.f6 movei in anlysis mode can understand >at depth 11 that black has significant problems >so it seems clear that finding the moves is only a question >of time for it. > >It suggests 27...Bf8 with more than +1 for white at depthes >11,12. > >Uri Some analysis for the f6 problem(p850,128 mbytes) 11 37 7519 8975374 g3e4 d6e7 b1e1 f7c4 f1f2 g8f6 e4f6 e7f6 d4e5 f6d8 f5f6 12 52 10897 12842165 g3e4 d6e7 b1e1 f7c4 f1f2 c4d5 d4e5 g7e5 e4g5 e7g5 c3e5 g8f6 g2d5 c6d5 12 53 13270 15751595 f5f6 12 99 32812 39364605 f5f6 g7f8 d4e5 d6e6 a2a3 a8d8 g2e4 e6c4 f1d1 g5g4 d1d8 e8d8 12 99 34356 41186615 f5f6 g7f8 d4e5 d6e6 a2a3 a8d8 g2e4 e6c4 f1d1 g5g4 d1d8 e8d8 13 103 46489 55314884 f5f6 g7f8 d4e5 d6e6 b1d1 e6c4 d1d4 c4a2 c2a2 f7a2 f6f7 e8e5 f7g8q h8g8 g2e4 It probably needs depth 14 to find e5 and my estimate is an hour on p850(128 mbytes hash). Uri
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