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Patrol chess - solution

In order to capture or give check, a piece (including kings) must be `observed' by another piece of the same player.

Hubert Gockel
1st Prize Probleemblad 1994
Dedicated to Peter Gvozdjak

K
PbPN
rRpkpp
Pp
QbPPNr
pR
pp
n

White to mate in two moves; Patrol chess.

Solution

The `try' is 1. c4 x d5, threatening mate with 2. R x e6. If black plays Bd6, then white can mate with Rg3, but there is no mating move after Rh5.

The solution is 1. R x e6, threatening mate with 2. Rg3. If black plays Bd6, then white can mate with 2. c4 x d5.

Note the cyclic mechanism, and several other mechanisms in this first prize winner problem.

Written by Hans Bodlaender.
WWW page created: August 18, 2000. Last modified: August 18, 2000.