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We know that a (absolutely) pinned piece can move and give a check, and the check can even be a mate.

The following is an example for such a checkmate.

[FEN "8/8/2k5/8/4p2b/r7/3RKPBr/q7 w - - 0 1"]

1. f4 exf3#

Source: A. Skodras, Quora

I am interested in knowing whether this has ever occurred in a master game; say, both opponents are rated 2000+ and the game was competitive (e.g., in a tournament).

I suppose this happening in a game would be rare, let alone in a master game. But, the first impression (I had) that "moving a pinned piece and giving check cannont be a good move" is wrong.

[Title "Schatz vs. Giegold, Hof (1928)"]
[FEN "7k/pb5q/1p3p2/2p1p1p1/6P1/QP4KR/P4PP1/1B5r b - - 0 1"]

1... Qh4+

Source: Martin Weteschnik, Understanding Chess Tactics (btw, this is one of the best books on how tactics work).

Here, the move 1... Qh4+ is the best move (along with 1... Rxh3+ which is a slightly slower mate).

Addendum

CQL may be the best solution for questions of this type. One way I can think of to form a cql query is the following (and its flipcolour variant):

  1. white gives check (and mates black) in the current position,
  2. the piece last moved is X,
  3. if piece X is removed from previous position, then white is in check.

I don't know how (or whether) step 3 can be expressed in cql.

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  • 1
    You can use the filter pin to identify pinned pieces. – kamekura May 3 at 16:56
  • @kamekura Thanks. Is there a way to identify absolute pin? – Cyriac Antony May 3 at 17:21
  • 1
    In CQL, the value of pin is the set of squares on which there is a piece pinned against its own king by a piece of the opposing color. I.e. "pin" means absolute pin. – kamekura May 3 at 18:31
  • Terminological nitpick: "Absolutely" pinned means, well, absolutely. (At least in German, where the three kinds of pin are clearly distinguished: "echt", "halbecht", "unecht".) In problemists terms, you describe a "Pelle move" (a move along the pin line, which includes the very special en passant case). – Hauke Reddmann May 4 at 7:37
  • @HaukeReddmann That's interesting. It is unfortunate that "absolute pin" in English can mean two different things. The definition I am using is "pinned to the king". – Cyriac Antony May 5 at 4:20

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