Q(4,7)
Chess on an Infinite Plane (vickalan - gyrados06)
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Some games can go for 100 moves or more, so if we play one move per day that would be a little more than three months. One of my games (vs. SuperSam) was 169 moves, and it took half a year. If someone blunders then the game can be shorter.
9.N(7,5)