Yesterday Chess problem

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Bruno's Chess Problem: 12/30/2025

L.Romani, Marianne, 1937

Mate in 2(****)
chess problem diagram
White to play

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Level : * (very easy) to ****** (very hard)

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1. O-O-O! ... 2. Qd4#
  1... Qxd8, Qb4, Qd6 2. Qd6#
  1... Ne6 2. Nf7#
  1... Nc6, Nf5 2. Qd5#
  1... f3 2. Qe3#
  1... Rd3 2. Nxd3#
  1... Rc3+ 2. Qxc3#
  
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2025-12-30 08:21:14, by problemist
"Nothing truly valuable arises from ambition or from a mere sense of duty; it stems rather from love and devotion toward men and toward objective things."
Albert Einstein (1879-1955) To F. S. Wada, an Idaho farmer who requested some words that his son, Albert Wada, could live by as he grew up, July 30, 1947. Quoted in Dukas and Hoffmann, 'Albert Einstein, the Human Side,' 46. Einstein Archives 58-934.

Black has the strong defense 1.. Qb4! pinning the wQ which works e.g. on 1. Rd1? Thus the key is castling 1. 0-0-0 (2. Qd4#) provoking the check 1.. Rc3+ 2. Qxc3# and many more variations 1.. Rd3, f3, Nc6 (Nf5), Qd6 (Qb4, Qxd8), Ne6 2. Nxd3#, Qe3#, Qd5#, Q(x)d6#, Nf7#. Note that castling is allowed if the position is reachable such that castling is legal, in particular wR and wK did not move, which is obvious here. There are "retro-problems" where one can prove that castling is illegal, see e.g. the early twomover by Sam Loyd, "Musical World," 1859.

Lucien Romani, French composer.

Since the opening in October 2000, I had published online more than 6650 free chess problems. If you want more details, look at my chess figures pages.

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