Author: Howard Exner
Date: 06:59:15 03/26/99
Go up one level in this thread
On March 26, 1999 at 08:52:35, Harald Faber wrote: >On March 26, 1999 at 08:01:24, Bernhard Bauer wrote: > >>>>>8/p5pp/P7/4KP2/2k5/8/7P/8 w - - id Prog X - Prog Y; bm h2h4; >>>>>h3 also wins but this is a good position to test computers to see if they avoid >>>>>Kd6 and choose instead h4 or h3. >>>> >>>>It's often difficult to give only one *best* move for a certain position. >>>>While I agree that h4 wins Ke6 instead of h4 should be considered too. >>>>On a 2xPPro 232 MHz system crafty16.6 finds h4 at ply 12 within 9 sec whith >>>>a score of 2.86. Crafty fails high within 10 sec and after 24 sec it returns a >>>>score of 7.1 at ply 13. However, after 134 sec crafty fails high at ply 16 with >>>>Ke6! At ply 19 the score is 16.6 and at ply 20 crafty fails high again. IMHO >>>>Ke6! is even easier to see from a human perspective. But doesn't white eventually have to follow-up with h4 and f6 anyway as Harald's line shows that if white first goes after the a7 pawn it is drawn? I think Ke6 is more like the move h3 as it delays the win by one extra move. >>>>B. Bauer >>> >>>Can you give me the line please. At the moment I have only draw with Kd6 and >>>Ke6: 44.Ke6 Kd4 45.Kc6 Ke5 46.Kb7 Kd6 with 47.Kxa7 Kc7 draw. Same motive with >>>44.Kd6. Another idea 44.Ke6 Kd4 45.Kf7 Ke5 46.Kxg7 Kxf5 47.Kxh7 Kg4 48.Kg6 Kh3 >>>49.Kf5 Kxh2 50.Ke5 Kg3 51.Kd6 Kf4 52.Kc7 Ke5 53.Kb7 Kd6 and so on. >> >>Here is the output from crafty: >> >> 19-> 15:10 16.60 1. Ke6 Kb5 2. Kf7 Kc4 3. h4 Kd4 4. >> h5 Ke5 5. Kxg7 Kf4 6. f6 Kg5 7. f7 >> h6 8. f8=Q <HT> > >5.h6 does also work. > >>The move h4 follows two moves later. >>Hope that helps. > >Not really. Of course this is a winning line but already the 1st black move is >senseless. 1.Ke6 Kb5??? Try to win this with Crafty after 1...Kd4. My lines and >ideas are written above. I agree that Kb5 too easily gives up. Kd4 at least makes the opponent have to come up with the h4,f6 plan. > >>Kind regards >>B. Bauer
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