Author: Bernhard Bauer
Date: 00:42:14 03/02/00
Go up one level in this thread
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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