Question
A knight exited the square `a1` and, after several moves, returned to the same square.
Is it possible that the knight made an odd number of moves?
Difficulty level (1 very easy - 10 very hard): 3
Topics:
Combinatorics
->
Invariants
Logic
->
Reasoning / Logic
Number Theory
->
Division
->
Parity (Even/Odd)
Combinatorics
->
Colorings
->
Chessboard Coloring
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