.diagram
| fen:r7/2n5/1q6/5k2/8/8/K7/8:
figcaption.
- The king cannot take on a8 because it's guarded by the knight: it's checkmate
+ The king cannot take on a8 because the square is guarded by the knight:
+ it's checkmate
h3 Source
| and
a(href="http://www.pathguy.com/chess/ZenChess.htm") this one
| .
+
+p Inventor: Moe Moss (1970)