This is the game that introduces a unique concept of custodial trapping pieces and delaying their capture until a later turn. It is playable using a regular chess board and some of the pieces from a regular chess pieces, which start on the board in a set configuration. Since its launch, several other games by the same author have appeared which borrowed from the concept. These games include Crossing Stonehenge and King's Crossing.
In the game, players will end up trapping one or more pieces in a line between two of their own pieces. These pieces are then frozen and are not able to move. After this, a piece bookending the pieces will end up moving and occupying the space of one of the pieces it traps and removing it from the board.
Players win the game by either capturing the enemy Commander piece or getting their own Commander across the board.