strange move

Hi,

move 30 in my most recent game (I've won it this morning) is pretty strange.

I (black) got a pawn at a5, and my opponent has it on b5. His b5 pawn then hits my pawn moving to a6. Apart from the fact that it's not a very legal move I would expect the programme to counter this.

bug or .. ?

http://www.chess.com/echess/game.html?id=19456794

edit: I added the link to the game

It's a perfectly legal move, see the basic rules:

"

En Passant

The last rule about pawns is called “en passant,” which is French basically means “in passing”. If a pawn moves out two squares on its first move, and by doing so lands to the side of an opponent’s pawn (effectively jumping past the other pawn’s ability to capture it), that other pawn has the option of capturing the first pawn as it passes by. This special move must be done immediately after the first pawn has moved past, otherwise the option to capture it is no longer available. Click through the example below to better understand this odd, but important rule."

Actually, it is a legal move called En Passant.  Don't feel too bad about it, though.  This is a rule that a lot of people don't know and whose first experience with it is much like yours.

OK .. looks pretty solid, never heard of the rule before but there's allways time for a first I guess.

boy it's only 8 AM and I've learned something new, what a day this must become :D

Sorry to have spoiled our games by going time out. Due to work commitments I can't always get to the computer in time to make my move . I'll probably give 24 hour games a miss from now on. If you would like a friendly game sometime just let me know. Always happy to play 3 day move games. Hope you do well in the next round.