1. White to King?
White reaches e8. Is e8=K legal?
No, a pawn cannot promote to a second king. When it reaches the final rank, it must become a queen, rook, bishop, or knight of its own colour. Each player keeps exactly one royal king, and promotion never creates another one.
Legal: queen, rook, bishop, or knight of the pawn's colour.
Illegal: king, pawn, or any enemy-coloured piece.
Memory rule: Q, R, B, N. King is never part of the promotion menu.
Decide whether each proposed promotion is legal. Illegal king choices demonstrate a valid replacement, so every resulting board remains a genuine chess position.
1. White to King?
White reaches e8. Is e8=K legal?
2. Black to King?
Black reaches e1. Is e1=K legal?
3. Second White King?
White's king is on g1. May a7-a8 create another king?
4. Capture to King?
White captures a rook on a8. Is bxa8=K legal?
5. Queen Promotion
Is e8=Q a legal promotion?
6. Rook Promotion
Is e8=R a legal promotion?
7. Bishop Promotion
Is e8=B a legal promotion?
8. Knight Promotion
Is e8=N a legal promotion?
Check and checkmate are defined around one royal king for each side. Allowing a pawn to create another king would make basic questions undefined: which king must escape check, and which king would have to be checkmated?
Standard chess avoids that contradiction by limiting promotion to queen, rook, bishop, or knight. Those pieces may be duplicated freely; the king cannot.
Choose a Legal Type
A spare king beside the board does not add king to the promotion menu.
Make It Unambiguous
The board must clearly show whether the new piece is a queen, rook, bishop, or knight.
Ask the Arbiter
If the required physical piece is unavailable in formal play, summon the arbiter rather than improvising a king promotion.
No, a pawn cannot promote to a second king in standard chess. It must become a queen, rook, bishop, or knight of its own colour. Test e8=K in the White to King card, then run the legal e8=Q demonstration.
The promotion rule names only queen, rook, bishop, and knight as legal choices. A king is excluded because each side keeps one royal king whose check and checkmate status decides the game. Compare the illegal king cards with the four legal-choice cards in the trainer.
No, White cannot create a second white king. White's original king remains the only white king throughout the game. Use the Second White King card to reject the choice and show legal rook promotion instead.
No, Black cannot create a second black king. A black pawn reaching the first rank must become a black queen, rook, bishop, or knight. Test e1=K in the Black to King card.
No, each player has exactly one king in a standard chess game. Promotion cannot add another king or replace the royal king. Complete the White to King and Black to King cards to lock in the boundary.
A pawn can promote to a queen, rook, bishop, or knight of its own colour. King and pawn are not legal choices. Work through the Queen, Rook, Bishop, and Knight cards in the trainer.
No, a pawn reaching the final rank must promote immediately and cannot remain a pawn. The player must choose a queen, rook, bishop, or knight. Follow the Can It Stay a Pawn route after completing this trainer.
No, underpromotion means choosing a rook, bishop, or knight instead of a queen. It never includes a king because king promotion is illegal. Compare the legal Rook, Bishop, and Knight cards with the king cards.
No, that transformation does not exist in standard chess, so its imagined power does not matter. Choose among the four legal pieces according to the position. Use the Four Legal Choices summary and trainer cards.
No, being in check does not add king to the promotion choices. A promotion may answer check only by creating a legal queen, rook, bishop, or knight that resolves it. Follow the Promoting While in Check route for legal king-safety examples.
No, kings are not captured in a completed standard chess game; checkmate ends the game before king capture. Promotion therefore cannot replace or revive a captured king. Use the Why One King Matters section to connect promotion with checkmate.
No, a pawn cannot promote to any king, and a promoted piece must belong to the pawn's side. The only choices are your own queen, rook, bishop, or knight. Continue to the Same-Colour Rule card after the trainer.
No, capturing onto the final rank does not expand the promotion list. The pawn may become its own queen, rook, bishop, or knight, but not a king. Test bxa8=K in the Capture to King card.
No, the enemy king is never captured in standard chess. A move that checkmates ends the game, and a pawn may not move onto the king's occupied square. Review the Why One King Matters section after the capture-promotion card.
No, an illegal king promotion cannot answer check. A legal promotion must remove, block, or capture the checking threat while leaving the original king safe. Follow the Promoting While in Check route for the correct test.
No, king promotion cannot be used as a defence because it is not a legal move. Only a legal queen, rook, bishop, or knight promotion can affect the mating position. Use the legal-choice cards to practise the available pieces.
There is no promoted king in standard chess. Only the original king is subject to check, checkmate, and king-safety restrictions. Compare the illegal king proposal with the legal e8=Q result in the first card.
No, the question never arises because a player cannot have two kings. Checkmate concerns the one royal king each side began with. Read the Why One King Matters section after completing the trainer.
No promoted king exists under standard rules, so it has no legal movement rights. If a king-shaped marker is used for another promoted piece in casual play, its agreed identity must be clear. Use the Over-the-Board Piece Problem section for practical guidance.
No, a pawn cannot become a king, so a promoted king cannot castle. Castling involves the original king and an eligible rook under the normal castling conditions. Return to the Four Legal Choices summary to keep the rules separate.
In formal play, use an unambiguous queen rather than a king-shaped substitute. A spare marker does not change the legal identity of the chosen piece, but unclear representation can cause disputes. Follow the three steps in the Over-the-Board Piece Problem section.
The available plastic pieces do not change the legal promotion choices. In formal play, summon the arbiter for the required queen, rook, bishop, or knight rather than declaring king promotion. Use the Over-the-Board Piece Problem section before tournament play.
A standard online chess board should offer only queen, rook, bishop, and knight. It should not include a king button. Run the four legal-choice cards to rehearse the menu you should expect.
It may be a chess variant, custom analysis tool, or interface error rather than standard chess. Check the selected game rules before continuing. Use this trainer's four legal choices as the standard-chess reference.
No, king promotion is illegal in standard over-the-board chess. The player must place or identify a queen, rook, bishop, or knight of the pawn's colour. Use the White to King and Black to King cards for both sides.
No, standard correspondence chess uses the same promotion-piece list: queen, rook, bishop, or knight. The slower time control does not alter the rule. Complete the trainer once as White and once as Black.
A custom chess variant may define unusual pieces or promotion rules, but that does not make king promotion legal in standard chess. Check the variant's own rules separately. Keep this trainer as the reference for ordinary chess.
Remember the four-letter set Q, R, B, N: queen, rook, bishop, knight. King and pawn are excluded. Replay cards five to eight in that order to memorise the complete legal set.
It should not be written as a legal move because notation such as e8=K represents an illegal promotion choice. Legal examples include e8=Q, e8=R, e8=B, and e8=N. Compare those forms across the trainer cards.
Next study whether a pawn may remain a pawn, whether the promoted piece must be captured first, same-colour ownership, and tactical underpromotion. These pages cover the other common promotion-choice boundaries. Follow the Continue the Promotion Route cards after the trainer.
Learn every core rule, then practise how legal promotion choices change real positions.
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