Originally posted by Shallow BlueHere's one nit-pick: a capture is no guarantee that progress is being made.
Right now, there are two kinds of moves which reset the 50 move rule counter. These are captures and pawn moves. The reason for this choice is that those are the only two moves which cannot be undone, so after those moves, and only those moves, do we know for certain that the game is still progressing. Right?
There is another kind of move w ...[text shortened]... so long as at least one of its rooks has not moved.
Now let the nit-picking begin.
Originally posted by SwissGambitpermit me a nit-pick;
Here's one nit-pick: a capture is no guarantee that progress is being made.
In fact, there are some captures that are not legal specifically because no progress is being made.
[fen]8/1k6/8/p1p1p1p1/P1P1P1P1/8/2B5/qK6 w - - 0 1[/fen]
White is not permitted to play 1.Kxa1 here. The position is an immediate draw because of a FIDE rule that states t ...[text shortened]... st unskilled counterplay. This position meets the criteria before the Queen is captured.
Originally posted by SwissGambitYes, I see.
Moves that can't be undone indicate that the position is changing in a permanent way.
Originally posted by greenerpawnThey did that without computers having anything to do with it.Don't recall which ending(s),think Troitsky had something to do with it.
Yes, I see.
Widening the debate, are there any situations where computers have now shown that a win is possible in some specific endings where more than 50 moves are required?
If so, should not the 50 move rule be amended to, say, an 80 move rule for that particular ending?
Originally posted by sundown316All normal moves can be undone simply by making the opposite move. Moving your queen from a4 to b3 can be undone by, the next move, moving it from b3 to a4. You could move your queen through all squares, and your opponent could be moving his through them all in a different order. You could easily avoid the 3-repetitions rule by moving in irregular patterns. The 50-move rule exists to avoid such a situation.
Since when can any move,except an illegal one,be undone?