Patrol chess is a fairy chess form, mainly appearing in fairy chess problems. It was invented by Federik
Hendrik von Meyenfeldt, who published in 1975 the first Patrol Chess problem in the Problemist.
The rules of orthodox chess are followed, with the following modification.
In order to capture or give check, a piece (including kings) must be `observed' by another
piece of the same player. (Note that it is allowed to move a piece to a position where it would give check
under standard chess rules, even if it is not observed; however, it only will actually give check when
Observing means that the piece can move to the square - for pawns, the diagonal capture movement
is used; i.e., it is the usual guarding of pieces as in use of common chess.
While Patrol chess is mainly used as a problem theme, it is actually also a nice and playable chess variant.
As most chess strategies still are valid in Patrol Chess, it is a chess variant for chess players - good
chess players probably will also be good in Patrol Chess.
1st Prize Probleemblad 1994
Dedicated to Peter Gvozdjak
White to mate in two moves; Patrol chess.
This problem contains a try: a move that is `almost' a solution, but fails just because
of one black countermove.
Written by Hans Bodlaender.
WWW page created: August 18, 2000.
Last modified: May 23, 2001.