Chessgi vs Loop Chess

Chessgi is a chess variant invented by Ralph Betza in 1964 that adds a shogi-style re-entry rule to orthodox chess. When a player captures a piece, the captured unit changes sides and is kept in a reserve; on a later turn, the player may drop it onto a vacant square instead of moving a piece already on the board. Standard descriptions restrict some drops, including a rule that a pawn may not be pl...

Loop Chess is a chess variant built around a board whose edges connect to the opposite edges. A piece that moves beyond the right side can reappear on the left, and a piece that leaves the top or bottom can return on the opposite rank, so ordinary lines of attack and escape routes become cyclic. The name is also used for variants that add recycling or drop rules for captured pieces, so the exact t...