Questions tagged [double-check]

A double check is a move in which one moves and gives check, while also revealing a check from a piece behind it. A double check can also be created through promotion and en passant.

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If a pawn promotes to a checking piece while also revealing a check, it is a double check?

I'm writing a chess engine just for fun, and during the validation of movement generation, I found some positions in Perft Results that differ from what my engine is producing. As an example, take ...
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Is it possible to block a double check? [duplicate]

Is it possible to block a double-check, or is your only option to move the king? (I'm trying to code a chess game, to then go on to code a chess AI, and this would really help me)
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Has there ever been at least a single instance of promotion with double check in a professional game?

Promotion is an uncommon move in professional games. What many may not know is that it is possible to preform a double check while doing so. Here is a small example. [FEN "2kr4/2P5/1KR5/8/8/8/8/8 w k ...
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What is the longest possible sequence of double checks?

It is a known record for most number of mutual checks in a row. This made me wonder what the most number of possible double checks in a row is. Only one side can deliver a double check of course. I ...
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What is the fastest way to an en passant checkmate AFTER all other possibile en passant have been made?

I want to know what the quickest way to an en passant mate is for either side, after all other possible en passant moves by both sides have been made. This is a very complicated question, so it is ...