p.
Two boards are used in this variant (represented on only one).
- Upside-down pieces appear at every "normal" pieces moves: they live on
+ Colored pieces appear at every "normal" pieces moves
+ (yellow for white, red for black): they live on
another board. When moved, they return to the initial board.
Orthodox rules apply on each board.
In addition, the final square should not be occupied by a piece from the
| fen:rnbqkbnr/ppp1pppp/8/8/2p5/5O2/PP1PPPPP/RNBQKB1R:
figcaption After the moves 1.Nf3 Pd5 2.Pc4 Sxc4
+p.
+ As in the orthodox game, win by checkmating the king.
+ It shouldn't be able to escape the check, not even by moving to the other
+ board.
+
p.
En-passant and castle occur as they do in the standard game.
More specifically, en-passant is possible regardless of the worlds pawns
cannot occur on board 2, because it would mean king and rook moved).
Moreover, the king cannot be in check on board 2 after castling.
-h3 End of the game
-
p.
- As in the orthodox game, win by checkmating the king.
- It shouldn't be able to escape the check, not even by moving to the other
- board.
+ Any move played should be legal on the board it is done,
+ and result in a legal situation on the other board. For example
+ 1.Pe4 Pd5 2.Be2!? Sxe4?? 3.Cb5# is checkmate because
+ 3...Kd7 is not valid on board 1.
h3 More information
a(href="https://www.schemingmind.com/journalarticle.aspx?article_id=9")
| schemingmind.com
| .
+
+p Inventor: Vernon R. Parton (1953)