On Chess.com it would be 500 moves, you cannot proceed from there.
How long is the longest possible chess game?
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GSHAPIROY wrote:
Scottrf wrote:
ViktorHNielsen wrote:
Theoretically unlimited, neither player has to claim a draw at the 50-move rule.
The longest game with a decisive result (1-0 or 0-1) is 250-ish.
I've had a 350 move decisive game.
On chess.com?
450 sorry:
http://www.chess.com/livechess/game?id=582483469
Scottrf wrote:
GSHAPIROY wrote:
Scottrf wrote:
ViktorHNielsen wrote:
Theoretically unlimited, neither player has to claim a draw at the 50-move rule.
The longest game with a decisive result (1-0 or 0-1) is 250-ish.
I've had a 350 move decisive game.
On chess.com?
450 sorry:
sorry to admit, but I wasted 3 minutes of my life looking at this silliness
Probably as long as it took me to play it.
Scottrf wrote:
GSHAPIROY wrote:
Scottrf wrote:
ViktorHNielsen wrote:
Theoretically unlimited, neither player has to claim a draw at the 50-move rule.
The longest game with a decisive result (1-0 or 0-1) is 250-ish.
I've had a 350 move decisive game.
On chess.com?
450 sorry:
You got a won position and then messed about to make it really long. A human would resign.
DefinitelyNotGM wrote:
You got a won position and then messed about to make it really long. A human would resign.
I wouldn't be so sure:
http://www.chess.com/echess/game?id=61000890
Taking about the time... On chess.com it is
14 (days) × 500 (moves) × 2 (players) = 14 000 days
which equals
38 years and 4 months
Oct 3, 2013
0
#30
The pawns don't need to capture each other. It can capture a piece and move off of its file and allow the opposing pawn "passage." So you only need to subtract a few moves from pawns moving up the board 1 square. It can later capture another piece to return to its original file where it will have clear passage. So how does that add up? Instead of subtracting 400 you subtract 16? Or do you not subtract anything?
Oct 3, 2013
0
#31
Btw, this reminds me of a game where some guy calculated the fastest way to get 6 pawns on a single file. It was pretty funny.
The longest possible chess game lasts 5898 moves according to
http://www.chesschat.org/showthread.php?12548-Longest-possible-chess-game
At http://www.cwi.nl/~tromp/chess/longest.html you can play through a game that's short by 3 moves...
I thought the pawns getting passed each other might be a bit more complicated than you calculated in actual practice... I admit I thought your number would be further off than 2 because of it.
Depends on the time control...
Somewhere from 800-850 moves
Scottrf wrote:
GSHAPIROY wrote:
Scottrf wrote:
ViktorHNielsen wrote:
Theoretically unlimited, neither player has to claim a draw at the 50-move rule.
The longest game with a decisive result (1-0 or 0-1) is 250-ish.
I've had a 350 move decisive game.
On chess.com?
450 sorry:
AAAAHHHH!!!! AND 10|10 TIME ALSO!!
You all have got the wrong end of the stick. If you only move once every 14 days the longest game could go on for years.
Henryk1 wrote:
You all have got the wrong end of the stick. If you only move once every 14 days the longest game could go on for years.
According to MSC157: Taking about the time... On chess.com it is
14 (days) × 500 (moves) × 2 (players) = 14 000 days
which equals
38 years and 4 months
NewArdweaden wrote:
Henryk1 wrote:
You all have got the wrong end of the stick. If you only move once every 14 days the longest game could go on for years.
According to MSC157: Taking about the time... On chess.com it is
14 (days) × 500 (moves) × 2 (players) = 14 000 days
which equals
38 years and 4 months
You missed out vacation time, but I think that is splitting hairs.
Henryk1 wrote:
NewArdweaden wrote:
Henryk1 wrote:
You all have got the wrong end of the stick. If you only move once every 14 days the longest game could go on for years.
According to MSC157: Taking about the time... On chess.com it is
14 (days) × 500 (moves) × 2 (players) = 14 000 days
which equals
38 years and 4 months
You missed out vacation time, but I think that is splitting hairs.
Yes, I know. Let's say both players are premium members... Oh god, that's complicated.
They both have 90 days of possible vacation time. It refills in 45 months (3yr 9mh). But opponent refills it in 42 months of play, because he fills it also during other vacation time. So, unless I'm very much mistaken (and I probably am), it happens exactly 9 times for each player to use vacation time.
So, 9 (times) × 2 (players) × 3 (months of vacation) = 54 months
54 months = 4 years 6 months
So actually it's around 42 years and 10 months. 
I think that bound is too high. The reason I think it is too high is that the paawns have to get past each other and it seems the only way to do that is with some captures on the way. Since a capture also advances a pawn to the next rank you are allowing too may moves.
Finding the exact answer is a serious pain in the butt.
That's why I subtracted 400 moves at the end. Only 8 captures are required, so that's 50(8)=400. Note that there would be more moves in-between captures in an actual game.
However, I suppose that the answer may be 5900, since the last 49 moves involve two kings on an otherwise empty board.