1. Undefended Queen
The undefended queen on e3 checks White. Is Kxe3 legal?
Yes, a king can capture a queen when the queen is adjacent and its square is safe. The queen's value does not protect it. KxQ is illegal only when the queen is out of range or another enemy piece attacks the king's destination.
1. Adjacent: the queen must be one king move away.
2. Enemy queen: the king cannot capture its own queen.
3. Safe square: no enemy piece may attack the destination after KxQ.
Decide whether each KxQ move is legal. Illegal captures demonstrate a safe king move instead of placing the king on a defended or unreachable queen square.
1. Undefended Queen
The undefended queen on e3 checks White. Is Kxe3 legal?
2. King-Protected Queen
Black's king on e6 protects the queen on e5. Is Kxe5 legal?
3. Rook-Protected Queen
The rook on a3 protects the queen on e3. Is Kxe3 legal?
4. Bishop-Protected Queen
The bishop on b6 protects the queen on e3. Is Kxe3 legal?
5. Knight-Protected Queen
The knight on f5 protects the queen on e3. Is Kxe3 legal?
6. Pawn-Protected Queen
The black pawn on d4 protects the queen on e3. Is Kxe3 legal?
7. Distant Queen
The queen on e2 checks along the file. May White play Kxe2?
8. Black Captures Queen
The undefended queen on e6 checks Black. Is Kxe6 legal?
Imagine the queen removed and the king placed on its square. Then trace enemy king, pawn, knight, bishop, rook, and queen attacks into that destination.
One remaining defender is enough to make KxQ illegal, no matter how valuable the queen would be.
Undefended Queen
The king may take it safely, even when the queen gives check.
Protected Queen
The king cannot trade its safety for material, regardless of queen value.
Distant Queen
A king cannot leap two squares to reach it.
Yes, a king may capture an adjacent enemy queen when the destination square is not attacked by any enemy piece. The queen's high value does not give it immunity. Play Kxe3 in the Undefended Queen card.
Yes, if taking the queen removes every check and leaves the king on a safe square. Since an adjacent queen attacks the king, KxQ is normally a check response. Use the Undefended Queen card.
No, piece value has no effect on capture legality. The king may take a queen, rook, bishop, knight, or pawn when the destination is safe. Use the Queen Value Versus King Safety summary.
The queen must be one king move away, it must be an enemy piece, and no enemy attack may cover the destination after capture. The move must also remove every current check. Use the Three-Part Queen Capture Test.
Yes, a king captures only one square horizontally, vertically, or diagonally. A queen two or more squares away is outside its range. Reject Kxe2 in the Distant Queen card.
No, the king cannot leap to a distant queen even if the path is clear. It must answer the queen's attack another way. Use Kd4 in the Distant Queen card.
No, the queen's square lies in the enemy king's adjacent control zone, so KxQ would leave the capturing king in check. Reject Kxe5 in the King-Protected Queen card.
No, if the rook attacks the queen's square after capture, the king cannot land there. Reject Kxe3 in the Rook-Protected Queen card.
No, a bishop's diagonal attack makes the destination unsafe. Trace b6-c5-d4-e3 in the Bishop-Protected Queen card.
No, a knight attack on the queen's square prevents KxQ even when no line is visible. Reject Kxe3 in the Knight-Protected Queen card.
No, an enemy pawn's attack on the destination makes the capture illegal. Use the pawn's attack direction rather than its forward movement direction. Reject Kxe3 in the Pawn-Protected Queen card.
Yes, removing the queen may open a long-range attack onto the king's destination. Always evaluate the board after the queen disappears. Use the protected-queen cards to practise tracing defenders.
Yes, any one remaining enemy attack is enough to make KxQ illegal. Count every pawn, knight, bishop, rook, queen, and king attack on the destination. Use the Defender Scan section.
The result depends on the formal attacked-square rule and the exact pin geometry, so do not assume a visible pin automatically makes KxQ safe. Use the dedicated King Captures a Pinned Piece route for that separate question.
Yes, if the sacrifice truly leaves the queen undefended and the resulting king square is safe. Many queen sacrifices work precisely because another piece protects the queen or creates a follow-up. Compare Undefended Queen with the protected cases.
It may be a legal checking move, but the king can capture it if the queen's square is otherwise safe. A queen placed beside the king usually needs protection or a tactical reason. Use the Undefended Queen card to test the consequence.
No, checkmate requires that every legal response fail. If KxQ safely removes the check, the position is not checkmate. Play Kxe3 in the Undefended Queen card.
An enemy queen on a square adjacent enough for KxQ attacks the king, so the king begins that capture decision in check. A nonadjacent queen is outside the king's one-square range. Use the queen-capture trainer to see both boundaries.
Yes, the queen may have been blocking a rook, bishop, or queen line. If that line attacks the destination after KxQ, the capture is illegal. Apply the full resulting-position scan from the Defender Scan section.
Yes, Black follows the same one-square and destination-safety rules. Colour does not change the test. Play Kxe6 in the Black Captures Queen card.
Yes, when the black queen is adjacent and its square is safe after capture. White cannot take a protected or distant queen. Compare the first seven trainer cards.
Use ordinary king-capture notation, such as Kxe3, Kxe5, or Kxe6, with check or mate suffixes only when required. The captured piece's letter is not added. Compare the trainer button notation.
A standard interface should allow KxQ only when the king is safe on the destination square. It should reject protected or distant queens. Test your prediction across all eight cards.
The move is illegal because the king remains in check. In formal play, use the applicable illegal-move procedure and summon the arbiter. Replay the relevant protected-queen card to identify the defender.
Once the queen is removed, it no longer attacks any square, so its own former attack does not defend it. Other enemy pieces and the enemy king decide whether KxQ is safe. Use the Undefended Queen card.
Yes, if the queen is one backward square away and the destination is safe. Direction does not change the king's capture pattern. Follow the King Captures Backwards route for orientation-specific examples.
No, winning a queen never permits the king to enter an attacked square. King safety overrides material gain. Follow the Move Into an Attacked Square route after the trainer.
A custom variant may define different royal safety rules, but standard chess uses the safe-destination test. Check the variant's rules separately. Keep this trainer as the standard reference.
Ask: is the queen adjacent, is it enemy-coloured, and is its square safe after capture? All answers must be yes. Replay Undefended Queen, King-Protected Queen, and Distant Queen.
Next study capturing the checking piece, pinned-piece captures, backward captures, and moving into attacked squares. Those pages extend the same destination-safety test. Follow the Continue the King Route cards after completing the trainer.
Learn every core rule, then practise how legal promotion choices change real positions.
or create a ChessWorld username
Already have an account? Log in