Chess tactics
Double Check: Why the King Must Move
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A double check attacks the king with two pieces after one move. In the usual pattern, the moving piece gives check while uncovering a line check from a bishop, rook, or queen. The reply must be a king move, because a move by any other piece cannot remove both attacks at once. The king's move may capture one checker if the destination is safe and the other check is also escaped.
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Double Check: what it is and how it works
A normal block or capture by another piece deals with at most one checker, so it is illegal while the second attack remains. A king move works by leaving both attacked lines or jumps at once. That move can include Kxchecker: if the king captures one checking piece, lands on a square not attacked by the other checker or any defender, and is no longer on the discovered line, the capture is legal.
The forced king move can be a powerful tempo, but it does not make the checking pieces expendable by default. The king may capture one of them, reach a safe square, or improve its position. Calculate every legal king destination and the follow-up rather than assuming double check leads to mate. A rare en-passant move can uncover two line checks at once; the same king-move rule applies.
How to spot it over the board
- Look for a discovered-check set-up where the moving front piece also gives check itself — that is a double check.
- List every legal king move, including captures of either checker; discard only destinations attacked in the resulting position.
- Use the forced displacement only when the next check, capture, or mating net has been verified.
- A knight often supplies one check because its attack cannot be blocked, but the king may still capture it if the square is legal.
A common calculation error
On defence, do not spend time on blocks or captures by another piece: generate king moves. On attack, do not stop at the motif's forcing appearance. Check whether the king can take a checker, step out of both attacks, or reach a square from which your continuation no longer works.
How hard are these puzzles?
This collection contains 13 double check puzzles, with a recorded median rating of 1846 and a dataset range from 1347 to 2281. Puzzle ratings are estimates produced by results in their source pool; they can change and should be read as a guide for choosing practice, not as an objective measure of difficulty.
- Puzzles tagged
- 13
- Lowest recorded rating
- 1347
- Recorded median
- 1846
- Highest recorded rating
- 2281
Double Check puzzles to solve
These positions come from the LibreChess trainer and are ordered by the rating stored in this dataset. Play your candidate move on the board, then compare it with the listed solution and replay the continuation.
Worked example 1 — rated 1347
Black to move. Find the double check, then reveal the solution.
32... Rg1+ 33. Rxg1 33... hxg1=Q#Worked example 2 — rated 1797
White to move. Find the double check, then reveal the solution.
24. Nxf7+ 24... Kg8 25. Nh6#Worked example 3 — rated 1883
Black to move. Find the double check, then reveal the solution.
34... Qxh2+ 35. Kxh2 35... hxg3#Worked example 4 — rated 2281
White to move. Find the double check, then reveal the solution.
24. Nd6+ 24... Qxd6 25. Bf7#Keep training by rating
Choose a rating band as a starting point. If the positions are routinely immediate or opaque, move one band up or down; puzzle ratings are pool estimates rather than fixed grades.