Original Problems, Julia’s Fairies – 2014 (I): January – April
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No.494 by Thomas Pantalacci – A nice play with promotions in B and S! (JV)
Patrol Chess (Patrouille): A piece can capture or give check only if it is observed by a piece of its own side.
No.494 Thomas Pantalacci
original – 30.01.2014
h=3 b) Bd7→d5 (5+6)
Solutions: (click to show/hide)
a) 1.c2-c1=B Sd6xc4 2.Bc1-a3 Bd7xb5 3.Ba3xb4 Rd2-b2 =
b) 1.c2-c1=S Bd5xc4 2.Sc1-b3 Sd6xb5 3.c5xb4 Rd2-a2 =
(C+ by Popeye 4.63)
I think the main point is not in the promotions, but rather in the specific pins of bB and bS, and in the exchange of Patrol effects on the d file:
in a), the wS is first patrolled by Rd2 and can capture on c4, then the wB is patrolled and can capture on b5; in b), it’s the other way around.
Another fine problem by this composer!