Originally posted by FabianFnasYour reasoning is flawed. A piece can be forced to move more than once.
I don't believe it!
One has to take the 50 move limit for a draw into account.
Since there is 5 picese on board then the 50 move rule can apply for 5 times 50 move, i.e. 250 moves.
If there is no mate within 250 moves there is a draw. Mate in 517 is impossible.
Originally posted by Mephisto2If (a) a pawn not has moved or (b) a piece is not taken, then it is draw after 50 moves. The 50 move rule is one of the reasons (besides other rules) a game turns into a draw.
Your reasoning is flawed. A piece can be forced to move more than once.
Here is an article about it: http://www.xs4all.nl/~timkr/chess2/diary.htm
Originally posted by FabianFnasI agree with what you state about the 50 move rule.
Originally posted by FabianFnasYou are right about the rule. I misinterpreted what you wrote, mainly because I had read the article in the link myself shortly before and was probably too eager to support the first poster than to read more carefully. Sorry for that.
If (a) a pawn not has moved or (b) a piece is not taken, then it is draw after 50 moves. The 50 move rule is one of the reasons (besides other rules) a game turns into a draw.
In this particular game (a) there is no pawns to be moved and (b) no piece has been taken in the first 50 moves. This gives us that this game is draw after 50 moves and there is ...[text shortened]... 5+ and White wins" So it takes more than 518 moves to win, not precisely 517 moves to mate.
Originally posted by VarenkaIf I'm not mistaken, that shatters the previous record of something close to 250 moves. Where did you read the article?
I read today that a 7-piece endgame position has been discovered where a forced win exists, but against the best defence requires 517 moves.
Originally posted by VarenkaThanks. A lot has happened since October: 243 moves stood as the record for 15 years, then 290 for less than six months; then 330, and now 517. How long will this record hold? Bets, anyone.
See the link posted by Mephisto2...
It mentions the previous record.