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Problem Bank · inv-1

Invariants & Monovariants · Coloring argumentsOlympiad classic●●●●○ 7/10~5 min⏱ 0:00
An 8×88 \times 8 board has two diagonally opposite corner squares removed. How many ways can the remaining 6262 squares be tiled by 3131 dominoes?
coloringparityimpossibility