all of the pieces for protect king.
and it is mean that king is better than queen.
and it is mean that king is better than queen.
the worth of a king is infinite, because it is against the rules to put him of the board.
Btw. this is a funny trap for chess programmer. Because the most programs use integer numbers to represent the aktual score they have to set a checkmate value. Most work with centipawn as unit, so that a pawn is worth 100, most a queen is 900. Now you have to define the checkmate value. It has to be a number beyond the maximal sum of all the pieces together. And here the programer can make a simple error. All together a set of pieces have a value of about 3900 centipawns. So we let us set the checkmate value to 5000, because there are also positional bonuses and stuff.
Now we play againt the computer and get into a really bad endgame. We are lost!?! The computer has four passed pawns and a lot of his pieces left. We have a lone king. Now the computer let run his pawns and promote them to queens.
Should we resign? NO!!!
We should not, because now the computer uses all his resources to avoid checkmate. Because a checkmate is worth 5000 centpawns, but his pieces have a much higher value! So checkmate is not the best move ;-)
Btw. this is a funny trap for chess programmer. Because the most programs use integer numbers to represent the aktual score they have to set a checkmate value. Most work with centipawn as unit, so that a pawn is worth 100, most a queen is 900. Now you have to define the checkmate value. It has to be a number beyond the maximal sum of all the pieces together. And here the programer can make a simple error. All together a set of pieces have a value of about 3900 centipawns. So we let us set the checkmate value to 5000, because there are also positional bonuses and stuff.
Now we play againt the computer and get into a really bad endgame. We are lost!?! The computer has four passed pawns and a lot of his pieces left. We have a lone king. Now the computer let run his pawns and promote them to queens.
Should we resign? NO!!!
We should not, because now the computer uses all his resources to avoid checkmate. Because a checkmate is worth 5000 centpawns, but his pieces have a much higher value! So checkmate is not the best move ;-)
@JoelH: My thoughts when reading that:
1. That's a really stupid mistake!
2. I don't know any programmers who would make that mistake!
3. Actually, come to think of it, yes I do.
I tend to think of this in terms of attacking and defensive values. A king is work about 3 pawns in attack, and an infinite number in defence.
1. That's a really stupid mistake!
2. I don't know any programmers who would make that mistake!
3. Actually, come to think of it, yes I do.
I tend to think of this in terms of attacking and defensive values. A king is work about 3 pawns in attack, and an infinite number in defence.
#14
Look here
chessprogramming.wikispaces.com
i actually do not find the pages, but last year i wrote a article about computer chess for the newspaper of my chess club and i found unbelievable endgames played by computers. Back in the good old1980's but sure they did that.
And by the way, me to, in another form but the same problem
http://joelh.de/atomystica/?p=140
Look here
chessprogramming.wikispaces.com
i actually do not find the pages, but last year i wrote a article about computer chess for the newspaper of my chess club and i found unbelievable endgames played by computers. Back in the good old1980's but sure they did that.
And by the way, me to, in another form but the same problem
http://joelh.de/atomystica/?p=140
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