Retrograde Analysis Problem 8

  Difficulty: Intermediate   Keywords: Problem
[Diagram]

On a 5x5 board, after five moves (no one of them a pass), how many positions exist where you can determine exactly what the last move (B5) was? (Not knowing the order of moves, of course, but only seeing the position.)
/Attempts


This is a copy of the living page "Retrograde Analysis Problem 8" at Sensei's Library.
(OC) 2012 the Authors, published under the OpenContent License V1.0.
[Welcome to Sensei's Library!]
StartingPoints
ReferenceSection
About