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Subject: Re: Easy mate

Author: Rafael Andrist

Date: 15:00:18 09/13/03

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On September 13, 2003 at 14:34:26, John Merlino wrote:

>On September 13, 2003 at 14:31:55, Rafael Andrist wrote:
>
>>On September 13, 2003 at 14:08:37, John Merlino wrote:
>>
>>>On September 13, 2003 at 10:23:41, Frank Phillips wrote:
>>>
>>>>[D]8/4k3/8/8/4Kp1p/5N1N/8/8 w - -
>>>>
>>>>Just an amusing position.
>>>>
>>>>White to move and win.  Perhaps the longest forced mate my program has played.
>>>>I was not sure whether it would be caught out by the 50 moves rule.  (Any credit
>>>>goes to Eugene of course.).
>>>>
>>>>It traded down from B+Pawns versus 2N+Pawns to reach this endgame.  My heart
>>>>sank and I was already to fix yet another evaluation quirk - maybe still need
>>>>to.
>>>>
>>>>Frank
>>>
>>>Kxf4 is a forced mate in 90 moves and it will NOT be caught by the 50-move rule.
>>
>>No, after Kxf4 it is a draw. You need 51 moves to the next forced capture/pawn
>>push with best defence.
>>
>>Also, I did a short search up to depth 13 and could not find a win which would
>>not have been prohibited by the 50-move rule.
>>
>>The endgame is anyway only won in about 23% of all cases and even then, you will
>>fail to win it in more than 50% without the appropriate endgame tables.
>>
>>regards
>>Rafael B. Andrist
>
>You're probably right, since Black has many options. But can you prove it by
>posting the moves?

What kind of moves are you interested in? The optimal line of play or optimal
defense vs. DTM attacker?



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