8 variants of the connection game. Standard Hex on five board sizes, plus three Y-game variants on triangular boards. Bridge-aware MCTS search, pie rule for fairness, and win by connecting your pair of edges.
Hex is pure connection: no captures, no draws, no luck. Place one stone per turn and try to build a chain linking your two sides of the board. The pie rule ensures the first move is never decisive.
The tournament size. Each player owns two opposite edges of the rhombus. First to connect them wins. No draws are possible on a hex grid.
engine:
topology:
type: hex
shape: rhombus
sideLength: 11
players: [black, white]
plugins:
hex:
connect: edges
pieRule: true
search: mctsStandard Hex (11x11) — connect north to south or west to east
Played on a triangular board. Both players need to connect all three sides, not just two. The symmetry means neither player has a positional advantage from the board shape.
engine:
topology:
type: hex
shape: triangle
sideLength: 12
players: [black, white]
plugins:
hex:
connect: all-sides
pieRule: true
search: mctsY Game — connect all three sides of the triangle
Every hex variant is playable with MCTS AI opponents at multiple difficulty levels.