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Longest Possible Chess Game?
Start with 32 chesspieces.
Make 49 moves, avoiding repeating positions.
On move 50, move a pawn or make a capture.
Repeat N times until you make the last capture that leaves 2 kings.
There are 30 50-move sequences ending with a capture available.
There are 96 50-move sequences ending with a pawn move available.
8 of these sequences end with a pawn move that is also a capture.
Assuming FIDE rules, there are a total of 50*(30+96-8)=5900 50-move
sequences ending with a capture or a pawn move available. Use them
all up and the chess game is over. This sets the upper limit at
5900 moves, which at 2 minutes per move would take 11,800 minutes
which is 197 hours or 8.2 days of playing 24 hours a day.
I believe that this limit can be reached without drawing by any
other method such as repeating a position.
Guy Macon, Electronics Engineer & Project Manager for hire.
Remember Doc Brown from the _Back to the Future_ movies? Do you
have an "impossible" engineering project that only someone like
Doc Brown can solve? My resume is at http://www.guymacon.com/
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