Christmas Card puzzle 2011

--brrb--
--------
p-------
-------Q
-p-kpPp-
-P-pN-P-
---K----
--------

by Sam Loyd, 'Organ Pipes'

Solution in the comments!

Christmas Card puzzle 2011: solution

[Scroll down to see solution]
































1.Qa5!

Black has to move something, but the black pieces interfere with each other's key defensive lines in turn.

(1... Bd7 2. Qd5#)
(1... Be6 2. Qe5#)
(1... Bf5 2. Nxf5#)
(1... Rd6 2. Qxb4#)
(1... Rd5 2. Qxd5#)
(1... Re5 2. Qxe5#)
(1... Bc5 2. Qa1#)
(1... Bb7 2. Nf5#)

Chess Quotes

"...the initial position is decisive Zugzwang."
— Jon Speelman, The Observer Sunday 9 June 1996