Dark to move after 16 discs, with 0 columns already full.
Connect four within 4 of your own moves. Exactly one column starts the win; any other lets the opponent off.
What the position is about
- quiet move — The key move threatens nothing directly; it prepares a threat that cannot be met.
- diagonal four — The winning line runs on a diagonal, the hardest kind to see.
Finding the way in
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.
Take your time. There is no clock on the result, and a wrong move is simply taken back so you can look again.
Show the first move
Start with e4. Played out against the stiffest resistance, the whole line goes: e4 f4 f5 d5 c2 d6 c3.
Solve it and the next puzzle of the same game is one tap away. Your solved puzzles are ticked in the list, in this browser only.