olymmath

TUYMAADA 2019 J8

    Andy, Bess, Charley and Dick play on a 1000×10001000 \times 1000 board. They make moves in turn: Andy first, then Bess, then Charley and finally Dick, after that Andy moves again and so on. At each move a player must paint several unpainted squares forming 2×1,1×2,1×32 \times 1, 1 \times 2, 1 \times 3 , or 3×13 \times 1 rectangle. The player that cannot move loses. Prove that some three players can cooperate to make the fourth player lose.

    Dataset text AI-MO AoPS. Quoted with source.

    Solutions

    No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.

    Add a solution

    Similar problems

    These problems have the most words in common with this statement.

    Locator tuymaada/2019/j8 · Tag CNPY7ZZSY6 · Edit this page on GitHub · Keys: j next, k previous