In the spirit of Gomoku, two people play a version of the classic paper-and-pencil game tic-tac-toe but on an infinite checkerboard. In it, a player wins by getting four pieces in a row—vertically, horizontally, or diagonally.
Warm-up. Can the first player—blue—force a win in seven turns or less, where a turn consists of both blue and red placing pieces.
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