Author: John Coffey
Date: 11:16:09 03/03/00
Go up one level in this thread
I gave the position to Fritz 6. After a minute or two it realized that the game was a draw. On March 02, 2000 at 03:42:14, Bernhard Bauer wrote: >On March 02, 2000 at 01:58:25, blass uri wrote: > >>On March 02, 2000 at 00:22:15, John Coffey wrote: >> >>>With the position >>> >>>White King on a1 and white rook on a4 >>> >>>Black pawns on a3 and b3. Black King on c3 and Black knight on c4. >>> >>>My opponent and I thought that black could have won with 1. ... b2+ >>>2. Ka2 Nd2 where 3. Rxa3+ would fail to Kc2 winning. But 3. Rb4!! draws. >>> >>>Fritz 5.01 takes a remarkably long time to realize that this is a draw. After >>>3 minutes on a Pentium III 450 mhz it still thinks 1. .... Kd3 2. Rb4 Kc3 3. >>>Ra3 repeating >>>the position but Fritz still thinks -+ with a score of -1.59 >> >>[D]8/8/8/8/R1n5/ppk5/8/K7 b - - 0 1 >>Fritz5 is blind in this position. >>fritz5 cannot see a simple repetition but the position is not very simple for >>computers >>It is simple for them to see that b2+ does not win and that 1...Kd3 2.Rb4 Kc3 >>Ra4 is a draw but they need more time to see that lines like Ne3 leads to a >>draw. >> >>programs usually can see the draw after less than 3 minutes on pIII450 >> >>Uri > >Crafty does fine here. > > 19-> 1:03 4.11 1. ... Ne3 2. Kb1 Nc2 3. Ra8 Kd3 4. > Rd8+ Nd4 5. Ra8 Nb5 6. Rd8+ Kc3 7. > Rc8+ Kb4 8. Rb8 Kc4 9. Rc8+ Kd4 10. > Rb8 Kc5 11. Rc8+ Kb6 12. Rb8+ Ka5 13. > Rd8 > 20 1:06 -- 1. ... Ne3 > 20 1:12 0.00 1. ... Ne3 2. Kb1 Nc2 3. Ra8 Kd3 4. > Ra6 a2+ 5. Rxa2 <HT> > (3) 20-> 1:25 0.00 1. ... Ne3 2. Kb1 Nc2 3. Ra8 Kd3 4. > Ra6 a2+ 5. Rxa2 <HT> > (2) 21 1:40 0.00 1. ... Ne3 2. Kb1 Nc2 3. Ra8 Kd3 4. > Ra6 a2+ 5. Rxa2 <HT> > 21-> 1:50 0.00 1. ... Ne3 2. Kb1 Nc2 3. Ra8 Kd3 4. > Ra6 a2+ 5. Rxa2 <HT> > 22 2:07 0.00 1. ... Ne3 2. Kb1 Nc2 3. Ra8 Kd3 4. > Ra6 a2+ 5. Rxa2 <HT> > 22-> 2:17 0.00 1. ... Ne3 2. Kb1 Nc2 3. Ra8 Kd3 4. > Ra6 a2+ 5. Rxa2 <HT> > >Kind regards >Bernhard
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