Minimalistic Chess on a big board loosely based on this suggestion.

Big Chess

The Board

The Board is a 2-dimensional 32x32 grid. Each position on the grid may contain a single Piece.

Turns

On their turn, players may take one action with one of their pieces, after which their turn ends. Players take turns in the order in which they joined the Cycle, repeating after the last player. If a player has not made a move in 24 hours since their turn began, their turn is skipped.

Winning

If only one player owns a King, that player wins.

The above win condition does not come into effect until multiple players have created a King.

Pieces

A piece is a unit that is owned by a player. On a player's turn, they may take a single action with one of their pieces per the rules below. When a piece Takes another piece it moves to the position of the other piece and the other piece is destroyed.

On a player's first turn they must create themselves a King in any unoccupied space not adjacent to any other piece. Doing so ends their turn.

Pawn

A Pawn can move one space in any cardinal direction and can take pieces in any non-cardinal direction.

King

Each player can have at most one King. A King can move and take pieces one space in any direction.

Proposals

Insert standard proposal rules. I don't think proposals need to be tied to turns - we can use phases as normal.

Judgements

Insert standard Judge/CFJ rules.

Notes

32x32 is probably way too big.
Pawn spawning and King respawning - taken out for the sake of minimalism. Probably more fun to decide via proposals.