Author: Howard Exner
Date: 07:20:21 11/09/99
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On November 09, 1999 at 01:35:19, James Robertson wrote: >On November 06, 1999 at 03:31:41, Howard Exner wrote: > >>Here are some positions to try out on your programs from the first >>half of the recent Dutch Computer Chess Championships. >>rnb1kb1r/pp1ppp1p/1q4p1/2pPP2n/8/2N2N2/PPQB1PPP/R3KB1R w KQkq - bm d5d6; id >>Insomniac - Morphy3.1; >> >>d6! ended the game quickly. I wonder if this was in book or just a nicely >>searched out move by Insomniac? > >I left book after Black played Qa5. Here is the log file: > >Pondering Nh5. >Depth Score Time Nodes PV > 1 22 0 51 (Nh5) Bc4 > 2 81 0 211 (Nh5) Na4 > 3 81 0 541 (Nh5) Na4 Qc7 > 4 81 0 995 (Nh5) Na4 Qc7 > 5 81 0 1547 (Nh5) Na4 Qc7 > 6 81 50 16540 (Nh5) Na4 Qc7 > 7 81 270 54656 (Nh5) Na4 Qc7 > 8 81 770 186985 (Nh5) Na4 Qc7 > 9 81 2800 682023 (Nh5) Na4 Qc7 > 10 81 8620 2092212 (Nh5) Na4 Qc7 > 11> 90 20100 4825175 (Nh5) d6 e6 g4 Ng7 Ne4 Nc6 Nxc5 Qd8 Bb5 f6 >Bxc6 bxc6 > 11 90 24880 6010879 (Nh5) d6 e6 g4 Ng7 Ne4 Nc6 Nxc5 Qd8 Bb5 f6 >Bxc6 bxc6 > 12 107 71620 16815410 (Nh5) d6 e6 g4 Ng7 Ne4 h6 b4 Qc6 b5 Qb6 Nxc5 >Qd8 >> f6h5 >Move predicted! Pondered for 117.43 seconds, time limit is 160.839 seconds. > 13 133 125120 28693972 d6 e6 g4 Ng7 Ne4 h6 b4 Qc6 b5 Qb6 Nxc5 Qd8 >Bc4 >Check Extensions: 452782. >Recapture Extensions: 201856. >EGTB probes: 0, EGTB hits: 0 >Thought for 125.12 seconds. >10. d6 Very nice move. I was impressed by your programs play from this tournament. > >>5r2/R6P/3Nb1p1/2p2k2/2P2Pp1/2K5/8/8 b - - bm f5f4; id Nimzo 732 - Insomniac; >> >>Looks like Kxf4 is a good fighting move, which black missed and eventually lost. >> >>1... Kxf4 2. Nf7 g3 3. h8=Q Rxh8 4. Nxh8 Bf5 5. Rg7 Kg5 6. Re7 g2 7. Re1 >>Kf4 now has white having to search for a draw. But Nimzo may well have entered the above line. Now it's black who has the upper hand. >> >>1... Kxf4 2. Re7 Rh8 3. Rxe6 Rxh7 is better but still offers black a possible >>draw. > >The resulting KRPP vs KR ending is not 'lost' because it isn't in the 5 piece >tablebases. If the king captures on f4 the ending is obviously lost. >I think >this is what happened, although I have not checked as I don't have the 5 man >tablebases on my machine at home. > >Nimzo didn't use tablebases, so I suppose it would have been better just to eat >the pawn and hope Nimzo goofed up the resulting KRPKR ending. There's lots of venom in Kxf4. Nimzo could have lost also. It's probably a move that's more comfortable for a human to make, given the counter play with the advanced black g pawn. Not that computers won't plat Kxf4 (I think Bob H posted that Crafty played Kxf4). By the way, were you there at the tournament or did you have another person operate insomniac? If there, what were your impressions of the event? - anecdotes and such.
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