an "X" mark is appended to the move to indicate a capture.
To keep notation short the potential list of captured squares is not written.
+h3 "Suicide" note
+
+p.
+ In the current implementation, all pieces except kings can "commit suicide",
+ that is to say move or be left on a square where they are mated.
+
h3 End of the game
p The game ends when a king is "mate-captured".