Hold up, why was there an extra play after the game was over? Every puck in winning black diagonal has at least 1 puck above it. That means Red made a play after the winning move was made.
Analysis of the board post-game. 12 pucks each, so both sides made the same number of moves. Black victory is (reading from Red's side) A4, B3, C2, D1. Columns B & D have an additional black puck above the winning set, so those columns were not the winning move. A3, B3, D3 was clearly blocked by Red at C3, meaning that C2 was not the winning move, leaving A4 as the only move that would have ended the game. A4 has a red puck above it.
Conclusion: Black went first, and after playing the winning the winning move in A4, did not announce his victory, and Red failed to see he had lost the game and played A5, which would have been a useless play even if the game was not already lost.
Hold up, why was there an extra play after the game was over? Every puck in winning black diagonal h