No.1383 
Michel Caillaud & Sébastien Luce
(France)

Original Fairy problems
JF-2019/I:
January – June’2019


No.1383 Michel Caillaud & Sébastien Luce
France

original – 11.03.2019

Solution: (click to show/hide)

White Ka1 Qa2 Black Ka7 Rb8e3 Bc1f3 Pa4d5e4g2

s#26                                             (2+9)
Black play only to double check


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shankar ram
shankar ram
March 11, 2019 04:19

Indeed a rare condition! Normally when a condition like this is imposed on Black, it usually means:
a) Black obeys the condition, if possible, else he plays normally OR
b) Black obeys the condition, if possible, else he’s in stalemate

But here, there’s a third option:
c) Black obeys the condition, if possible, else he skips a move!

But well used by the composers to show a double Zabunov and 2 rundlaufs.

Paul Rãican
Paul Rãican
March 13, 2019 10:28
Reply to  shankar ram

The genre could be a sub-variant of: Black must check if able or does not play at all. In german, Schwarzschäche.

seetharaman
seetharaman
March 11, 2019 21:35

Ingenious use of the condition to create new batteries! Bravo.

dupont
dupont
March 14, 2019 20:03

One can see this problem as mainly a series one, where black must break the white series under particular circumstances.

In e.g. parry series, this particular circumstance is when black is in-check, when black can check in schwarzschache, and when black can double-check in this problem.

There are other variations on the same principle, such as “black play only to capture” (winchloe).