8x8 board with white/black pools, max/min # of mixed pairs
Source: Bulgaria 1970 P3
June 22, 2021
combinatoricsChessboard
Problem Statement
On a chessboard (with squares) there are situated white and black pools. We say that two pools form a mixed pair when they are with different colors and they lie on the same row or column. Find the maximum and the minimum of the mixed pairs for all possible situations of the pools.K. Dochev