span Remarks:
ul
- li A checkered move cannot be "undone" right after if this repeat the position.
+ li.
+ A non-capturing checkered move cannot be "undone" right after since
+ this would repeat the same position.
li Checkered pieces cannot be captured.
figure.diagram-container
Black plays Rxh4=P. (Checkered pawn to) h5 is allowed then,
because piece's nature changed.
-h3 Pawn moves
+h3 Pions
ul
li.