Event = {Smothered checkmate}
Variant = {black-king-only}
+---+---+---+---+---+---+---+---+
| r |   |   |   |   |   |   | k |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   | p | p | p |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   | N |   |
+---+---+---+---+---+---+---+---+
|   |   | Q |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
w - - (black-king-only)
[start]                 -+<LONG
[1w]                    (1w) Nxf7+ (#hm=0)
[1b]                    (1b) Kg8 (#hm=1)
[2w]                    (2w) Nh6+ (#hm=2)
[2b]                    (2b) Kh8 (#hm=3)
[3w]                    (3w) Qg8+ (#hm=4)
[3b]                    (3b) Rxg8 (#hm=0)
[4w]                    (4w) Nf7# (#hm=1)
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   | r | k |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   | N | p | p |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
b - - (black-king-only)
{White wins}{7 plies}