Author: John Merlino
Date: 11:17:35 04/23/01
Go up one level in this thread
On April 23, 2001 at 12:34:52, Oreopoulos Kostas wrote: >This is form a game Kasparov Karpov New York match > >[D]r2q1b1k/1b4p1/p2pr2p/3n4/Pnp1N1N1/6RP/1B3PP1/1B1QR1K1 b - - 147 1 > >The position has multiple tactical motives but i think none of the PC programs >can evaluate correctly the position. > >Karpov's move 25...Qe8? is a losing move due to 26.Nh6 c3 27.Nf5 cb2 28.Qg4 >25...Nf4 loses to Nef6! > >The only move to hold is 25...Nd3! but witch program can evaluate that this is a >saving move indeed. > >I tried Gambit Tiger 2.0 for about half an hour and it just gave Qe8 as the best >variation. The computer saw the Nh6 move but failed to see that after c3 Nf5 is >decive.. > >Any luck with other programs ?? > >Oreopoulos Kostas Well, CM8000 certainly could move Qe8, depending on the time control. But, since this is a very complex position, it kept changing its mind, but finally found a new PV in Qd7 after 7 minutes on a PIII-600: Time Depth Score Positions Moves 0:00 1/4 -0.92 8203 1...Qe8 2. Qd4 Rc8 3. Ne3 Nxe3 4. Rexe3 0:01 2/5 -0.88 39790 1...Qe8 2. Qd2 Nd3 3. Bxd3 cxd3 4. Rf3 0:02 2/6 -0.58 88628 1...Qe8 2. Qd4 Rc8 3. Nxh6 Nf6 4. f3 Nxe4 5. fxe4 Rxh6 6. Rxg7 0:03 2/6 -0.72 170725 1...Qe7 2. Qd4 Rc8 3. Ne3 Nxe3 4. Qxe3 Qf7 0:13 3/7 -1.08 699803 1...Qe7 2. Qc1 c3 3. Ba3 a5 4. Rf3 Qe8 0:28 3/8 -0.37 1555949 1...Qe7 2. Nxh6 Rxh6 3. Ng5 Qc7 4. Bg6 c3 5. Nf7+ Qxf7 6. Bxf7 cxb2 7. Rb3 1:00 3/8 -0.66 3487853 1...Nf4 2. Nef6 Qe7 3. Rxe6 Qxe6 4. Nxh6 Bxg2 5. Qd2 2:12 4/9 0.00 7925540 1...Nf4 2. Nef6 Rxe1+ 3. Qxe1 Nbd3 4. Nxh6 Qxf6 5. Bxf6 Nxe1 6. Nf7+ Kg8 7. Nh6+ Kh8 2:31 4/9 -0.18 9164978 1...Qe7 2. Nxh6 Rxh6 3. Ng5 Qc7 4. Bg6 Nd3 5. Nf7+ Qxf7 6. Bxf7 Nxb2 7. Qd4 2:59 4/9 -0.36 11092203 1...Qe8 2. Qd4 c3 3. Bxc3 Nxc3 4. Qxb4 Nxe4 5. Qxb7 Nxg3 6. Rxe6 Qxe6 7. Qxa8 Qe1+ 8. Kh2 7:01 4/9 -0.47 25421955 1...Qd7 2. Ne3 Nxe3 3. Rgxe3 Nd5 4. R3e2 Nf4 5. Re3 Rae8 6. Nc5 Rxe3 7. Rxe3 10:36 4/10 -0.46 38663411 1...Qd7 2. Ne3 Nd3 3. Bxd3 cxd3 4. Nxd5 Bxd5 5. Qxd3 Qb7 6. Rge3 Rc8 7. Ba1 But, in tournament time controls, depending on the processor, I think CM8000 could end up playing any of Qe8, Qe7, Qd7 and Nf4 (but not Nd3). jm
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