2 | Two new pieces: marshall and cardinal. Bigger board.
3 | Orthodox rules with a few adaptations.
9 li Material: standard + marshall + cardinal.
10 li Non-capturing moves: standard (+ new pieces).
11 li Special moves: standard (see below).
12 li Captures: standard.
13 li End of game: standard.
18 Notation for marshall is M and cardinal is C. A marshall has the moving abilities of
19 a knight + a rook, while the cardinal equals a knight + a bishop.
21 figure.diagram-container
23 | fen:10/10/10/10/10/2R2Q4/10/4c5/10/10:
24 figcaption The black cardinal can take on c5 and f5.
29 Castling is possible as in orthodox 8x8 game. The white king move to c1 or i1
30 (one square to the left of bottom-right corner) for large (resp. small) castle.
31 Same for black on the other side.
34 Promotion is mandatory for a pawn reaching the last rank. However, they can only
35 promote into a friendly piece captured (which is back on the board). If none is
36 available, the promotion on last rank is impossible and the pawn cannot move
37 (but still gives check).
40 Pawn promotion is possible (but not forced) on the two ranks before last,
41 only in an already captured (friendly) piece.
45 p As in the orthodox game, win by checkmating the king.
48 Note: I changed the author's starting position, to increase randomness
49 (and uniformize with other variants).
50 Thus the castling rule was introduced compared to the rules described
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