Connect-4 on 8x8 solved: player 2 wins 4ir forum
2 replies. Last post: 2015-11-21
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2 replies. Last post: 2015-11-21
Reply to this topic Return to forumWinning first-move replies are
1 4
2 3
3 4
4 4
Only the 2 opening move requires a different reply, as 2 4 hands the win to the 1st player.
The main opening lines have the first player switch to column 3 or 5 after playing the first 2, 4, or 6 ply in column 4,
at which point the 2nd player can play on either side to block the threat.
4 4 4 4 4 5 is also a 2nd player win, but 4 4 5 and 4 5 are 1st player wins.
The solver used, together with an extensive opening book, is available at https://github.com/tromp/fhourstones88
Congrats on solving the 8x8 board! Now I hope we can get 9x9 and 10x10 on LG…