Author: Uri Blass
Date: 15:42:07 08/20/02
Go up one level in this thread
On August 20, 2002 at 17:49:34, Robert Hyatt wrote: >On August 20, 2002 at 17:02:52, Uri Blass wrote: > >>I include only gam,es from 1993 >> >>Deep Blue - Hamann,S >>5R2/r5pp/3N2k1/3Ppp2/2P5/p7/P5PP/2n3K1 w - - 0 38 bm Nb5 > >What did DT play here? I only find Nb5 and I find it instantly and stick >with it... score =+1.5 so apparently DT was winning here. Did it lose by >playing something else??? Yes it lost by Rxf5 This is a typical computer move because it wins a pawn if you do not search deep enough when Nb5 does not win a pawn(unless you search very deep and I am sure that your +1.5 is based on poasitional factors). programs on the hardware of that time could not find Nb5 in 15 minutes Movei also need time to find it(almost 5 minutes on p800 to see that Rxf5 is not winning) 12 0 12893 23206423 f8f5 c1a2 h2h4 h7h6 f5e5 a2b4 e5e1 b4c2 e1e6 g6h5 e6e5 h5h4 e5e4 h4g5 e4e5 g5h4 12 1 22487 39275894 d6b5 12 23 25219 44104915 d6b5 a7d7 f8e8 e5e4 e8e6 g6g5 d5d6 d7d8 b5a3 c1a2 e6e7 g5f6 a3b5 d8d6 b5d6 f6e7 d6f5 e7f6 > > 7 0.16 ++ 1. Nb5!! > 7 0.24 1.37 1. Nb5 Rb7 2. Re8 e4 3. Nxa3 Ne2+ 4. > Kf2 Rb2 > 7-> 0.26 1.37 1. Nb5 Rb7 2. Re8 e4 3. Nxa3 Ne2+ 4. > Kf2 Rb2 > 8 0.41 1.18 1. Nb5 Rd7 2. Ra8 Nxa2 3. Ra6+ Kg5 > 4. Rxa3 Nb4 5. d6 > 8-> 0.48 1.18 1. Nb5 Rd7 2. Ra8 Nxa2 3. Ra6+ Kg5 > 4. Rxa3 Nb4 5. d6 > 9 0.63 1.22 1. Nb5 Rd7 2. Ra8 Nxa2 3. Rxa3 Nb4 > 4. Kf2 Nxd5 5. cxd5 Rxd5 > 9-> 0.80 1.22 1. Nb5 Rd7 2. Ra8 Nxa2 3. Rxa3 Nb4 > 4. Kf2 Nxd5 5. cxd5 Rxd5 > 10 1.10 1.18 1. Nb5 Rd7 2. Ra8 Nxa2 3. Ra6+ Kg5 > 4. Rxa3 Nc1 5. Rh3 h5 6. Rc3 > 10-> 1.58 1.18 1. Nb5 Rd7 2. Ra8 Nxa2 3. Ra6+ Kg5 > 4. Rxa3 Nc1 5. Rh3 h5 6. Rc3 > 11 2.85 1.38 1. Nb5 Rd7 2. d6 Ne2+ 3. Kf2 Nd4 4. > Nxd4 exd4 5. c5 Kg5 6. Ra8 d3 7. Rxa3 > 11-> 4.10 1.38 1. Nb5 Rd7 2. d6 Ne2+ 3. Kf2 Nd4 4. > Nxd4 exd4 5. c5 Kg5 6. Ra8 d3 7. Rxa3 > 12 6.41 1.36 1. Nb5 Rd7 2. d6 Nxa2 3. c5 Nb4 4. > Nxa3 e4 5. Nb5 Nc6 6. Re8 Kg5 > 12-> 9.37 1.36 1. Nb5 Rd7 2. d6 Nxa2 3. c5 Nb4 4. > Nxa3 e4 5. Nb5 Nc6 6. Re8 Kg5 > 13 20.40 1.56 1. Nb5 Rd7 2. d6 Nd3 3. Rc8 e4 4. Rc7 > Rd8 5. c5 e3 6. Kf1 Nc1 7. c6 Nxa2 > 13-> 26.10 1.56 1. Nb5 Rd7 2. d6 Nd3 3. Rc8 e4 4. Rc7 > Rd8 5. c5 e3 6. Kf1 Nc1 7. c6 Nxa2 > 14 48.10 1.49 1. Nb5 Rd7 2. d6 Nd3 3. Ra8 e4 4. Rxa3 > f4 5. Rc3 Nc5 6. Kf2 e3+ 7. Ke2 Kf5 > 8. h4 > > >> >>Note that at that time the position was tested on other programs and no program >>could find Nb5 in 15 minutes but today chess programs are better and have no >>problem to find Nb5 >> >>8/r5pp/3N2k1/3PpR2/2P5/p7/n5PP/6K1 w - - 0 39 am Rxe5 bm Rf3 (I am not sure if >>h4 is enough for a draw because of h5) > > >I get Rf3 instantly here with a draw score. Score 0.00 from the 1 second >mark on. Did DT play Re5? I could see where it might miss the draw since >it had a repetition flaw... Yes it played Rxe5 and lost. > 9 2.30 0.00 1. Rf3 Nc1 2. Rg3+ Kh5 3. Rh3+ Kg4 > 4. Rg3+ Kh5 > (2) 9-> 2.65 0.00 1. Rf3 Nc1 2. Rg3+ Kh5 3. Rh3+ Kg4 > 4. Rg3+ Kh5 > 10 3.00 0.00 1. Rf3 Nc1 2. Rg3+ Kh5 3. Rh3+ Kg4 > 4. Rg3+ Kh5 > (3) 10-> 5.40 0.00 1. Rf3 Nc1 2. Rg3+ Kh5 3. Rh3+ Kg4 > 4. Rg3+ Kh5 > (2) 11 6.40 0.00 1. Rf3 Nc1 2. Rg3+ Kh5 3. Rh3+ Kg4 > 4. Rg3+ Kh5 > (2) 11-> 12.10 0.00 1. Rf3 Nc1 2. Rg3+ Kh5 3. Rh3+ Kg4 > 4. Rg3+ Kh5 > 12 14.93 0.00 1. Rf3 Nc1 2. Rg3+ Kh5 3. Rh3+ Kg4 > 4. Rg3+ Kh5 > (2) 12-> 26.11 0.00 1. Rf3 Nc1 2. Rg3+ Kh5 3. Rh3+ Kg4 > 4. Rg3+ Kh5 > 13 30.78 0.00 1. Rf3 Nc1 2. Rg3+ Kh5 3. Rh3+ Kg4 > 4. Rg3+ Kh5 > > >> >>Deep Blue - Kristensen,B >>r1b2rk1/ppppnppp/2n3q1/1N6/2B1P3/2P1b3/PP3PPP/RN1Q1RK1 w - - 0 1 bm fxe3 >> > >This one is harder (for me/crafty). Crafty likes Nxc7 for a good while. >I ran these on a quad 550 and after 1:44, finishing depth=12, it had not >changed... I might run this longer later tonite... I agree that this is not simple even movei that does not like knight in the corner wants to play Nxc7 Here is some analysis of movei 11 -38 11637 14297599 b5c7 d7d5 e4d5 c6e5 f2e3 e5c4 d1d4 c8h3 f1f2 b7b5 c7a8 f8a8 12 -59 20619 25755380 b5c7 d7d5 e4d5 c6e5 f2e3 e5c4 d1d4 e7f5 d4c4 f5e3 c4e2 e3f1 c7a8 12 -59 42033 52206112 b5c7 d7d5 e4d5 c6e5 f2e3 e5c4 d1d4 e7f5 d4c4 f5e3 c4e2 e3f1 c7a8 My opinion is that white position is already not good and white also did a mistake earlier in the game. The previous mistake was Nb5 that should lose a pawn. [D]r1b2rk1/ppppnppp/2n3q1/2b5/2BNP3/2P1B3/PP3PPP/RN1Q1RK1 w - - 0 9 > > > >> >> >> >>Kristiansen,J - Deep Blue >>1r5r/5ppk/ppppqP1p/4p1PR/P1P1P2P/1P4Q1/2P3R1/7K b - - 0 35 bm Kg8 > > >What does this matter? Black is dead lost already it seems. My score starts >out at +1.5, goes to +2.7 within seconds... Thru depth=11, score is +2.77 for >g6. g6 fails low to +3.5 at depth=12, Kg8 becomes best with a score of +2.81. >I hardly see the difference between the two moves and it looks hopeless >already... I see only a pawn down for Kg8 when g6 lose the game by simple tactics. I guess that you have +1.81 positional score because of black's positional problems. There are other programs that see only +1.xx for white after kg8. Uri
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