Parallel Worlds Chess
Parallel Worlds Chess is a three-dimensional chess variant invented by R. Wayne Schmittberger in the 1980s. The gamespace comprises three 8×8 chessboards at different levels. Each side commands two full chess armies on levels 1 and 3. Level 2 begins empty and obeys its own move rules.
On each turn, a player may move up to three of his (pieces and/or pawns). (On the first turn, however, White may move no more than two men.) Each man moved can move only once in the turn. The only stipulation is that none of these moves may end on the same level. (They may begin on the same level, however.)
All men except kings can move straight up or down one level to an empty square. (Thus captures are not permitted when moving to a new level.)
- all men move as chess queens;
- captures are not permitted;
- a pawn that moves to the last does not promote.
Rules for pawns that move from level 2:
- If a pawn on level 2 moves to the owner's last rank on levels 1 or 3, it immediately promotes.
- If a pawn on level 2 moves to the owner's first rank on levels 1 or 3, on that level it can, on a future turn, move only one step to the second rank. Once on the second rank, it regains its normal two-step option.
- Double Chess—a 2D chess variant with two kings per side
- Millennium 3D Chess
- Wildebeest Chess—another chess variant by R. Wayne Schmittberger
- Pritchard, D. B. (1994). The Encyclopedia of Chess Variants. Games & Puzzles Publications. ISBN 0-9524142-0-1.
- Pritchard, D. B. (2007). Beasley, John (ed.). The Classified Encyclopedia of Chess Variants. John Beasley. ISBN 978-0-9555168-0-1.
- Schmittberger, R. Wayne (1992). New Rules for Classic Games. John Wiley & Sons Inc. ISBN 978-0471536215.