Quick answer
Choosing a Promotion Piece is a rules question: the legal-move test. Work from the first evidence position for Choosing a Promotion Piece, and begin by testing e4.
Begin from e4 in 8/8/3k4/8/8/4P3/8/3K4 w - - 1 3. Read the side to move, legal conditions, history fields and procedural distinction before relying on a shortcut. The evidence answer is: Choosing a Promotion Piece: identify checks, captures, pins and king safety before accepting a move as legal. Candidate line: e4.
In the Choosing a Promotion Piece example, notice: side White; pieces Black king d6, White pawn e3, White king d1; legal first moves e4, Kc2, Kd2, Ke2, Ke1, Kc1. Everything named after “notice” is descriptive of one recorded board, not prescriptive for all games.
The exact condition
The first evidence board tests the legal-move test; the second board tests the legal-move test. The first path uses direct FEN setup; the second path uses direct FEN setup as its setup string. Cross-check wording on the Chess Wiki and on the Rules hub. Then compare Piece Movement with En Passant Legality, Underpromotion Rules, The Pawn Two Square Move around a claim versus an automatic draw.
The two inventories make the distinction concrete. A contains side White; pieces Black king d6, White pawn e3, White king d1; legal first moves e4, Kc2, Kd2, Ke2, Ke1, Kc1; B contains side White; pieces Black king c8, White king c2, White pawn e2; legal first moves Kb3, Kc3, Kd3, Kd2, Kd1, Kc1, Kb1, Kb2. Compare the side to move before comparing the labels in the context of resignation versus a draw offer.
Topic dossier for this page and board pair r1:8 | r2:8 | r3:3k4 | r4:8 | r5:8 | r6:4P3 | r7:8 | r8:3K4 / r1:2k5 | r2:8 | r3:8 | r4:8 | r5:8 | r6:8 | r7:2K1P3 | r8:8: start with a claim versus an automatic draw; then test resignation versus a draw offer; keep the en-passant window separate from the arbiter's role in a claim; use the dead-position exception as the transfer check; and reserve the legal castling test for the exception.
Procedure and counterexample
On the first board, calculate e4 after e4 and write down the opponent's best reply around a claim versus an automatic draw. On the second board, calculate e4 after e4 and check resignation versus a draw offer. Separate what the board proves from what only the move record, clock or arbiter can establish. In this case the useful condition is the legal castling test.
Key claim: Choosing a Promotion Piece is illustrated here by the legal-move test; the first concrete test is e4. The board anchor is 8/8/3k4/8/8/4P3/8/3K4; the example is intentionally narrower than the topic label and should not be generalised without checking the surrounding position..
Practical boundary: To answer “When is choosing a promotion piece legal, what exceptions matter, and how can a player verify the rule at the board?”, compare the recorded setup with e4 and the opponent's reply. The decision is useful only when the stated condition survives that concrete test on board 2k5/8/8/8/8/8/2K1P3/8. The evidence records The position tests the stated rule or record field; verify the relevant source when a procedural decision matters and the second board signature r1:2k5 | r2:8 | r3:8 | r4:8 | r5:8 | r6:8 | r7:2K1P3 | r8:8. The false-positive test is whether the en-passant window appears without the arbiter's role in a claim, so the conclusion is useful only when the stated condition survives that concrete test.
Evidence positions
example-1: the legal-move test
Show answer
Choosing a Promotion Piece: identify checks, captures, pins and king safety before accepting a move as legal. Candidate line: e4.
Why this position is here: Choosing a Promotion Piece is represented by the legal-move test. This is a direct FEN setup with board anchor 8/8/3k4/8/8/4P3/8/3K4; no opening history is inferred from the diagram.
FEN: 8/8/3k4/8/8/4P3/8/3K4 w - - 1 3
Question: What is the first concrete decision in this choosing a promotion piece position?
Answer cue: Choosing a Promotion Piece: identify checks, captures, pins and king safety before accepting a move as legal. Candidate line: e4. The first candidate to test is e4. Replay e4 on board anchor 8/8/3k4/8/8/4P3/8/3K4 and write down what changes after it.
Evidence boundary: The position tests the stated rule or record field; verify the relevant source when a procedural decision matters.
example-2: the legal-move test
Show answer
Choosing a Promotion Piece: identify checks, captures, pins and king safety before accepting a move as legal. Candidate line: e4.
Why this position is here: Choosing a Promotion Piece is represented by the legal-move test. This is a direct FEN setup with board anchor 2k5/8/8/8/8/8/2K1P3/8; no opening history is inferred from the diagram.
FEN: 2k5/8/8/8/8/8/2K1P3/8 w - - 4 3
Question: What is the first concrete decision in this choosing a promotion piece position?
Answer cue: Choosing a Promotion Piece: identify checks, captures, pins and king safety before accepting a move as legal. Candidate line: e4. The first candidate to test is e4. Replay e4 on board anchor 2k5/8/8/8/8/8/2K1P3/8 and write down what changes after it.
Evidence boundary: The position tests the stated rule or record field; verify the relevant source when a procedural decision matters.
Reading the record
Read the first example (id example-1) as a complete record: continuation e4, source fide-laws. This is a direct FEN setup with board anchor 8/8/3k4/8/8/4P3/8/3K4; no opening history is inferred from the diagram. If A does not expose the legal-move test, correct the evidence before relying on the prose.
Read the second example (id example-2) separately: continuation e4, source fide-laws. Its feature is the legal-move test; inventory side White; pieces Black king c8, White king c2, White pawn e2; legal first moves Kb3, Kc3, Kd3, Kd2, Kd1, Kc1, Kb1, Kb2. Compare what changes between e4 and e4.
Common confusions
The main mistake to avoid with Choosing a Promotion Piece is remembering a simplified slogan while overlooking a history field, exception or procedural condition. In A, the missing condition must be located in r1:8 | r2:8 | r3:3k4 | r4:8 | r5:8 | r6:4P3 | r7:8 | r8:3K4 after e4; in B, test it against r1:2k5 | r2:8 | r3:8 | r4:8 | r5:8 | r6:8 | r7:2K1P3 | r8:8 after e4.
For Choosing a Promotion Piece, the first board's evidence boundary (after e4) is The position tests the stated rule or record field; verify the relevant source when a procedural decision matters. The second board's evidence boundary for Choosing a Promotion Piece is The position tests the stated rule or record field; verify the relevant source when a procedural decision matters. If a trusted source or careful calculation changes the conclusion around the dead-position exception, update both the evidence record and this article.
Practice with a position
rebuild the position from the initial board, change one condition, and explain exactly which rule changes the result. Start with A's side to move and r1:8 | r2:8 | r3:3k4 | r4:8 | r5:8 | r6:4P3 | r7:8 | r8:3K4; record two candidates, the reply to e4 and the correction. Repeat with B's side to move and r1:2k5 | r2:8 | r3:8 | r4:8 | r5:8 | r6:8 | r7:2K1P3 | r8:8; the changed board tests transfer rather than diagram memory.
After the drill, compare your notes with En Passant Legality, Underpromotion Rules, The Pawn Two Square Move through the arbiter's role in a claim. Keep A's rejected alternative beside B's chosen line e4; this shows whether the conclusion survived a new board signature.
Sources and scope
Sources for Choosing a Promotion Piece: FIDE Laws of Chess, 1chess.online editorial scope. Source ids are fide-laws, original-analysis. Primary evidence hook: fide-laws. Comparisons and practice notes are editorial. Evidence revision: 2026-08-remediation-r2.
Scope note for board pair r1:8 | r2:8 | r3:3k4 | r4:8 | r5:8 | r6:4P3 | r7:8 | r8:3K4 / r1:2k5 | r2:8 | r3:8 | r4:8 | r5:8 | r6:8 | r7:2K1P3 | r8:8: this page does not claim that e4 is an engine principal variation, that an exact endgame result is verified when the evidence says it is not, or that a tool output replaces human calculation. The conclusion is limited to the recorded boundary and the exception the en-passant window.