Graph topologies

Graph classes in src/common/graphs/ implement IGraph: a graphology graph plus coords2algebraic, algebraic2coords, neighbours, and path.

Choosing a graph

Board type	Class
Square, orth + diagonal	`SquareGraph`
Square, orthogonal only	`SquareOrthGraph`
Square, diagonal only	`SquareDiagGraph`
Directed square grid	`SquareDirectedGraph`
Fanorona lines	`SquareFanoronaGraph`
Snubsquare / Onyx	`SnubSquareGraph`, `OnyxGraph`
Hex hexagonal field	`HexTriGraph`
Slanted hex rectangle	`HexSlantedGraph`
Bao / Mancala pits	`BaoGraph`, `SowingNoEndsGraph`
Bent-Y triangle board	`BentTriGraph`
3D stacking on squares	`Square3DGraph`, `SquareOrth3DGraph`, `SquareDiag3DGraph`