Author: Dirk Frickenschmidt
Date: 00:14:22 09/09/98
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On September 08, 1998 at 16:07:31, David Eppstein wrote: Hi David, you wrote: >While I don't disagree with your judgement in this game, I have some concern >with your methodology: > >On September 08, 1998 at 14:02:44, Dirk Frickenschmidt wrote: >>In the game below Rebel9 played it's Slav >>defence very well, finally reaching an endgame with one pawn up. I already was >>convinced that Junior would suffer its first loss against Rebel. >... >>I judged the game as win for Junior >>after move 65; if anyone disagrees it will probably be easy to demonstrate the >>win: black cannot prevent to lose one remaining pawn after the other and then >>ist mated with king+rook against king. > >What is the difference between these two situations? >In one, you are convinced that Junior will lose, so you keep playing. >In the other, you are convinced that Junior will win, so you end the game. The difference between these two situations is easily explainded: a) around move 40 Rebel9 was one pawn up, and I could not recognize much compensation for white then. This does not necessarily mean a black win, but black's chances for a win would be rising for example after rook exchanges. b) If you look at the position in move 54, the situation has changed completely: one pair of rooks is exchanged, while white has managed to centralize its king in support of a strong passed pawn on row 6, while black's pawns are too slow and weak to play any decisive role and the black king has problems helping, unable to leave the h-file. c) In move 65 we finally have technical endgame win which modern top programs win with white without problems. As I have tested a lot I am just sure about this and don't want to waste time with something which - at least to me - seems to be clear beyond doubt. >In what circumstances do you declare a game over? >Shouldn't you wait until the programs themselves checkmate or resign? >Otherwise you leave yourself open to questions of partiality. I would not adjudicate a game if I had *any* doubts about the outcome... Of course anyone could try to prove that I am wrong in the above case, but if you ask other experienced testers I guess you would get the same answer concerning the evaluation of this position. So I hope my comments and decisions do not seem too unappropriate to you or others... Kind regards from Dirk
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