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Checkers Gomoku starts at an empty 8x8 square board.

FIRST PHASE [DROP] - Each player drops, at each turn, one stone on an empty cell. There are 12 stones for each player.
SECOND PHASE [MOVE] - Each player moves a stone at each turn. A stone can move to an adjacent (orthogonal or diagonal) empty cell.
CAPTURE - When a 5 in a row (orthogonal or diagonal) is achieved, that player removes one opponent stone.
GOAL - The first player with only 4 stones, looses.

An example

Black wins the game my moving the b7 stone to cell [1].