How pawn promotion works
Pawns are the only pieces that can never move backwards, so a pawn that reaches the last rank has nowhere left to go. The rules turn it into something new.
- It happens on the last rank.
The 8th rank for White, the 1st rank for Black: the row furthest from where the pawn started.
- You must choose a queen, rook, bishop or knight of your colour.
The pawn is exchanged “as part of the same move” (Art. 3.7.3.3). It cannot stay a pawn, become a king, or become one of your opponent’s pieces.
- The new piece works at once.
“The effect of the new piece is immediate” (Art. 3.7.3.5): it can give check, or even checkmate, on the move it appears.
A pawn can reach the last rank by moving straight forward or by capturing diagonally. Both count:
A pawn can promote while capturing diagonally. Here bxa8=Q removes the rook and the new queen gives check at once, because “the effect of the new piece is immediate” (Art. 3.7.3.5). Open in the analysis board
Black promotes on the first rank, the far side from Black’s point of view. Same rule, opposite direction. Open in the analysis board
Over the board you finish a promotion by putting the new piece on the square. Under Article 4.4.4 the choice is final once that piece has touched the promotion square, so decide before you reach for it. For the basics of how pawns move first, see how chess pieces move.
Can you have two queens? Yes, or more
Many beginners think you can only get a queen back if yours was captured. That is a house rule, not chess. Article 3.7.3.4 says the choice “is not restricted to pieces that have been captured previously”.
White already had a queen on a2 and promotes a second one on b8. Completely legal: the choice is “not restricted to pieces that have been captured previously” (Art. 3.7.3.4). Open in the analysis board
How many queens can you have?
In principle nine: your original queen plus all eight pawns promoted. The same logic gives up to ten rooks, ten bishops or ten knights. In practice two queens appear now and then in endgames, and three or more is a curiosity.
The same goes for other pieces. A promotion can leave you with three knights or two light-squared bishops: the rules do not care.
Try it: the promotion picker
Choose what the pawn becomes and see what happens. In two of these positions the obvious queen is the wrong choice.
Pick a piece to promote to.
A free pawn: any choice works: what each choice does
| Promotion | Result (chess.js) | What it means |
|---|---|---|
| d8=Q | Play continues | The usual choice: a queen is the most powerful piece, and king and queen against king is an easy win. |
| d8=R | Play continues | Legal, and still winning, but a rook mates more slowly than a queen. |
| d8=B | Play continues, insufficient material | Legal, but king and bishop cannot checkmate a lone king, so this throws away the win: the position becomes a dead draw. |
| d8=N | Play continues, insufficient material | Legal, but king and knight cannot checkmate a lone king either, so this also draws. |
Promote to a rook, not a queen: what each choice does
| Promotion | Result (chess.js) | What it means |
|---|---|---|
| c8=Q | Stalemate (draw) | Stalemate! Together, the new queen and the king on c6 cover every square around a7, but the black king is not in check. Black has no legal move, so the game is drawn instantly. |
| c8=R | Play continues | The rook does not cover a6, so Black still has a move (…Ka6) and White goes on to mate with king and rook. |
| c8=B | Play continues, insufficient material | Not stalemate, but king and bishop cannot force mate: a draw. |
| c8=N | Check, insufficient material | Check, but king and knight cannot force mate: a draw. |
Promote to a knight with check: what each choice does
| Promotion | Result (chess.js) | What it means |
|---|---|---|
| e8=Q | Play continues | A new queen, but no check, so Black keeps a queen too: queen against queen, and Black moves next. |
| e8=R | Play continues | No check: Black keeps a queen against White’s rook. |
| e8=B | Play continues | No check: Black keeps a queen against White’s bishop. |
| e8=N | Check | Check, and the knight also attacks the queen on c7: a fork. Whatever the king does, White plays Nxc7, winning the queen and staying a knight and a pawn up. |
Each result (check, checkmate, stalemate, insufficient material, number of replies) was computed with chess.js when the page was built, not written by hand.
Underpromotion: when a queen is the wrong choice
Promoting to anything other than a queen is called underpromotion. It is rare, but it decides games, and it has two common reasons.
- To avoid stalemate. A queen covers so many squares that it can leave a lone king with no legal move. A rook covers fewer, so play goes on. This is the idea behind the famous Saavedra position.
- To give a knight check. A knight attacks squares a queen cannot reach, so a knight promotion can arrive with check or a fork.
Bishop promotions are the rarest, because a queen can do everything a bishop can. They only make sense when a queen would cause stalemate and a rook would not help.
Online tip: many sites have an “auto-queen” setting that promotes to a queen without asking. It saves time, but it can cost you the stalemate positions above. Turn it off, or hold the key your site uses to choose a different piece.
No spare queen? Promotion over the board
Most sets come with one queen per side, so a second queen can be a practical problem.
- In a rated game: you may pause the clock “only in order to seek the arbiter’s assistance”, and a missing promotion piece is the standard example (Art. 6.11.2). The arbiter supplies the piece.
- If you press the clock without replacing the pawn: the move is illegal, and the pawn is replaced by a queen (Art. 7.5.2), with the usual illegal-move penalty.
- In casual games: players often turn a rook upside down to stand in for a queen. Fine between friends, but agree on it first; in a rated game ask the arbiter instead.
How promotion is written
In algebraic notation, write the pawn’s move and then the new piece: e8=Q (some books drop the equals sign: e8Q). A capture that promotes looks like bxa8=Q, and a check is added at the end: bxa8=Q+.
Common mistakes
| Mistake | The actual rule |
|---|---|
| “You can only get back a piece that was captured.” | Any queen, rook, bishop or knight, regardless of captures (Art. 3.7.3.4). |
| “The pawn has to go back to its own side first.” | No. It promotes the moment it reaches the last rank. |
| “You can keep it as a pawn.” | Promotion is compulsory. |
| “You can promote to a king.” | Never. Only Q, R, B or N. |
| “The new piece can’t move or check until next turn.” | Its effect is immediate (Art. 3.7.3.5). |
| Always choosing a queen | Check for stalemate first. A rook or knight is sometimes the only winning choice. |
Pawn promotion FAQ
Can you have two queens in chess?
Yes. When a pawn reaches the last rank you may promote it to a queen even if your original queen is still on the board. Two, three or more queens are all legal.
How many queens can you have in chess?
Up to nine per side in theory: the original queen plus all eight pawns promoted. In real games more than two or three is very rare.
What happens when a pawn reaches the end of the board?
It must be promoted, in the same move, to a queen, rook, bishop or knight of its own colour (FIDE Laws, Article 3.7.3.3). The new piece works immediately.
Do you have to promote a pawn?
Yes. A pawn cannot stay on the last rank as a pawn. Promotion is part of the move.
Can a pawn become a king?
No. The only choices are queen, rook, bishop or knight. A pawn also cannot turn into an opponent’s piece.
Can you promote to a piece you still have?
Yes. The choice is not limited to pieces that have been captured (Article 3.7.3.4). That is why you can have two queens or three knights.
Can a pawn promote when it captures?
Yes. If a pawn captures diagonally onto the last rank, it promotes on that same move.
What is underpromotion?
Promoting to a rook, bishop or knight instead of a queen. Players do it to avoid stalemate or to give a knight check that a queen could not.
What if there is no second queen in the set?
In a tournament, pause the clock and ask the arbiter for one (Article 6.11.2). In casual games, players often use an upside-down rook by agreement; do not rely on that in a rated game.
Does a promoted queen give check straight away?
Yes. “The effect of the new piece is immediate” (Article 3.7.3.5), so the new piece can give check or even checkmate on the move it appears.
How do you write promotion in chess notation?
Write the move and the new piece, for example e8=Q (or e8Q). A capture that promotes looks like bxa8=Q.
How we checked this
Every position is a FEN loaded into chess.js 1.4.0. For each promotion choice we played the move and recorded the result: check, checkmate, stalemate and whether the material left can still checkmate. The page build stops if any result in the picker, the tables or the captions disagrees with chess.js. For the knight fork we also checked that every Black reply still allows Nxc7. No engine evaluations are used on this page.
Show all positions with chess.js results
| Position | FEN | Result |
|---|---|---|
| Hero: pawn on d7 | 8/3P2k1/8/8/8/8/8/1K6 w - - 0 1 | d8=B, d8=N, d8=Q, d8=R |
| Second queen, before | 8/1P4k1/8/8/8/8/Q7/1K6 w - - 0 1 | b8=Q legal; queens after: 2 |
| Capture-promotion | r3k3/1P6/8/8/8/8/8/4K3 w - - 0 1 | bxa8=Q+ legal (check) |
| Black promotes | 4k3/8/8/8/8/8/5p2/2K5 b - - 0 1 | f1=Q+ legal (check) |
| A free pawn: any choice works | 8/3P2k1/8/8/8/8/8/1K6 w - - 0 1 | d8=Q: normal; d8=R: normal; d8=B: normal (insufficient); d8=N: normal (insufficient) |
| Promote to a rook, not a queen | 8/k1P5/2K5/8/8/8/8/8 w - - 0 1 | c8=Q: stalemate; c8=R: normal; c8=B: normal (insufficient); c8=N: check (insufficient) |
| Promote to a knight with check | 8/2q1P1k1/8/8/8/8/P7/K7 w - - 0 1 | e8=Q: normal; e8=R: normal; e8=B: normal; e8=N: check |
Sources
- FIDE Laws of Chess, approved 7 August 2022, in force from 1 January 2023: Articles 3.7.3.3–3.7.3.5 (promotion), 4.4.4 (choice finalised on touching the square), 6.11.2 (pausing the clock for the arbiter) and 7.5.2 (pawn not replaced). Checked 10 November 2026.