Solution to Problem 13.
Called by Chess with Chinese Pieces

Mate in three moves.  Daniel W. VanArsdale.  Aug. 29, 2017.
The images of rooks in the diagram represent cannons (paos).

Cannons on a4, g1, h1. Mate in three.

C = Cannon (Pao), the Chinese Rook       S = Knight

1. C-a1    C x a1  (any other move by black allows immediate mate)
2. C-b1    C x a7  (the only move black has)
3. P-b7 mate

Options for White
1. C-g8                   C-h4
2. K-e7 (c7 or d7)   C-h8
2. C-h3                   C-h6+     

1. C-h8                   C-g4
2. K-e7 (c7 or d7)   C-g7+    (or C-g2, g3, etc.)
3. K-c8+                 C-g8

1. C-b1                  C-a6+   (not C-b4 for then C-a1 mates next move)
2. S x a6 stalemate  (white's first move threatened S-a6 and S-c7 mate)

[1. C-R1, CxC   2. C-KN1  CxP  3. P-N7 mate]

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