Four in a Row puzzles
In every Four in a Row puzzle the side to move wins by force in exactly two, three or four moves, and only one first column does it. The solution was checked against every reply, and the hard ones agree with an exact solver.
Pick a number. A tick means you solved it in this browser.
Easy
#1–14 · Find the column that creates two winning spaces at once, or forces a block that sets up your second threat.
Medium
#15–27 · Three-move wins usually start with a forcing move: a threat the opponent has to block, after which your next disc makes a double threat.
Hard
#28–40 · In four-move wins, track which spaces become playable after each forced block; the final double threat often appears two rows above where you start.