The GridForge cast
Each friend shows you one idea by how they act. Meet them all and see how the ideas fit together.
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Arbor The game tree: every position branches into the moves that follow -
Ballast Stability and corners: the unflippable pieces in Reversi -
Causeway The bridge: a virtual connection that cannot be cut in Hex -
Domino Forcing sequences: chaining threats to keep the initiative in Gomoku -
Flank Territory flip: capturing a line of pieces in Reversi -
Mobi Mobility: keeping more moves available than your opponent -
Oddwin Parity: who-moves-last, the key to Dots-and-Boxes -
Rowan Connection: extending a chain of your pieces toward a win -
Twain The fork: one move that makes two threats at once