Quick answer
Promotion Tactic is a tactical idea: a promotion threat used as a tactic. Work from the first evidence position for Promotion Tactic, and begin by testing g8=N.
Begin from g8=N in 8/6Pk/8/8/8/8/8/6K1 w - - 1 2. Start with the forcing geometry: checks, captures, threats, defenders and flight squares around the target. The evidence answer is: Promotion Tactic: calculate the promotion square and every checking or capturing resource before queening. Candidate line: g8=N.
In the Promotion Tactic example, notice: side White; pieces White pawn g7, Black king h7, White king g1; legal first moves g8=N, g8=B+, g8=R, g8=Q+, Kf2, Kg2, Kh2, Kh1. Read those squares as a snapshot of this single board, not as a standing rule you can copy into every game.
The tactical trigger
The first evidence board tests a promotion threat used as a tactic; the second board tests a promotion threat used as a tactic. For the pair of examples, install A from direct FEN setup and install B from direct FEN setup. Hub vocabulary: Chess Wiki · Tactics hub. Then compare Candidate Moves with Stalemate Trick, Underpromotion Tactic, En Passant Tactic around a quiet threat after the forcing move.
The two inventories make the distinction concrete. A contains side White; pieces White pawn g7, Black king h7, White king g1; legal first moves g8=N, g8=B+, g8=R, g8=Q+, Kf2, Kg2, Kh2, Kh1; B contains side Black; pieces Black king g8, White pawn g7, White king f1; legal first moves Kh7, Kxg7, Kf7. Compare the side to move before comparing the labels in the context of an in-between move before recapture.
Topic dossier for this page and board pair r1:8 | r2:6Pk | r3:8 | r4:8 | r5:8 | r6:8 | r7:8 | r8:6K1 / r1:6k1 | r2:6P1 | r3:8 | r4:8 | r5:8 | r6:8 | r7:8 | r8:5K2: start with a quiet threat after the forcing move; then test an in-between move before recapture; keep the defender carrying two jobs separate from the line revealed after clearance; use the order of checks before captures as the transfer check; and reserve the loose unit behind the target for the exception.
Calculation order
On the first board, calculate g8=N after g8=N and write down the opponent's best reply around a quiet threat after the forcing move. On the second board, calculate Kh7 after Kh7 and check an in-between move before recapture. Calculate the most forcing move first, then test the opponent's best capture, interposition or counter-check before naming the motif. In this case the useful condition is the loose unit behind the target.
Key claim: Promotion Tactic is illustrated here by a promotion threat used as a tactic; the first concrete test is g8=N. The board anchor is 8/6Pk/8/8/8/8/8/6K1; the example is intentionally narrower than the topic label and should not be generalised without checking the surrounding position..
Practical boundary: To answer “How can a player recognize promotion tactic, calculate the winning idea, and test the defender's best resource?”, compare the recorded setup with Kh7 and the opponent's reply. The decision is useful only when the stated condition survives that concrete test on board 6k1/6P1/8/8/8/8/8/5K2. The evidence records Illustrative evidence for the stated mechanism; it is not a claim that the candidate move is forced or best in every position and the second board signature r1:6k1 | r2:6P1 | r3:8 | r4:8 | r5:8 | r6:8 | r7:8 | r8:5K2. The false-positive test is whether the defender carrying two jobs appears without the line revealed after clearance, so the conclusion is useful only when the stated condition survives that concrete test.
Evidence positions
example-1: a promotion threat used as a tactic
Show answer
Promotion Tactic: calculate the promotion square and every checking or capturing resource before queening. Candidate line: g8=N.
Why this position is here: Promotion Tactic is represented by a promotion threat used as a tactic. This is a direct FEN setup with board anchor 8/6Pk/8/8/8/8/8/6K1; no opening history is inferred from the diagram.
FEN: 8/6Pk/8/8/8/8/8/6K1 w - - 1 2
Question: What is the first concrete decision in this promotion tactic position?
Answer cue: Promotion Tactic: calculate the promotion square and every checking or capturing resource before queening. Candidate line: g8=N. The first candidate to test is g8=N. Replay g8=N on board anchor 8/6Pk/8/8/8/8/8/6K1 and write down what changes after it.
Evidence boundary: Illustrative evidence for the stated mechanism; it is not a claim that the candidate move is forced or best in every position.
example-2: a promotion threat used as a tactic
Show answer
Promotion Tactic: calculate the promotion square and every checking or capturing resource before queening. Candidate line: Kh7.
Why this position is here: Promotion Tactic is represented by a promotion threat used as a tactic. This is a direct FEN setup with board anchor 6k1/6P1/8/8/8/8/8/5K2; no opening history is inferred from the diagram.
FEN: 6k1/6P1/8/8/8/8/8/5K2 b - - 2 2
Question: What is the first concrete decision in this promotion tactic position?
Answer cue: Promotion Tactic: calculate the promotion square and every checking or capturing resource before queening. Candidate line: Kh7. The first candidate to test is Kh7. Replay Kh7 on board anchor 6k1/6P1/8/8/8/8/8/5K2 and write down what changes after it.
Evidence boundary: Illustrative evidence for the stated mechanism; it is not a claim that the candidate move is forced or best in every position.
example-3: a promotion threat used as a tactic
Show answer
Promotion Tactic: calculate the promotion square and every checking or capturing resource before queening. Candidate line: Kxg8.
Why this position is here: Promotion Tactic is represented by a promotion threat used as a tactic. This is a direct FEN setup with board anchor 6R1/7k/8/8/8/8/8/6K1; no opening history is inferred from the diagram.
FEN: 6R1/7k/8/8/8/8/8/6K1 b - - 0 2
Question: What is the first concrete decision in this promotion tactic position?
Answer cue: Promotion Tactic: calculate the promotion square and every checking or capturing resource before queening. Candidate line: Kxg8. The first candidate to test is Kxg8. Replay Kxg8 on board anchor 6R1/7k/8/8/8/8/8/6K1 and write down what changes after it.
Evidence boundary: Illustrative evidence for the stated mechanism; it is not a claim that the candidate move is forced or best in every position.
Reading the line
Read the first example (id example-1) as a complete record: continuation g8=N, source fide-laws. This is a direct FEN setup with board anchor 8/6Pk/8/8/8/8/8/6K1; no opening history is inferred from the diagram. If A does not expose a promotion threat used as a tactic, correct the evidence before relying on the prose.
Read the second example (id example-2) separately: continuation Kh7, source fide-laws. Its feature is a promotion threat used as a tactic; inventory side Black; pieces Black king g8, White pawn g7, White king f1; legal first moves Kh7, Kxg7, Kf7. Compare what changes between g8=N and Kh7.
The defensive resource
The main mistake to avoid with Promotion Tactic is spotting a familiar motif but failing to test the defender's strongest legal resource. In A, the missing condition must be located in r1:8 | r2:6Pk | r3:8 | r4:8 | r5:8 | r6:8 | r7:8 | r8:6K1 after g8=N; in B, test it against r1:6k1 | r2:6P1 | r3:8 | r4:8 | r5:8 | r6:8 | r7:8 | r8:5K2 after Kh7.
For Promotion Tactic, the first board's evidence boundary (after g8=N) is Illustrative evidence for the stated mechanism; it is not a claim that the candidate move is forced or best in every position. The second board's evidence boundary for Promotion Tactic is Illustrative evidence for the stated mechanism; it is not a claim that the candidate move is forced or best in every position. If a trusted source or careful calculation changes the conclusion around the order of checks before captures, update both the evidence record and this article.
Practice from a real game
cover the answer, list checks and captures, and record the defender or escape square that decides whether the idea works. Start with A's side to move and r1:8 | r2:6Pk | r3:8 | r4:8 | r5:8 | r6:8 | r7:8 | r8:6K1; record two candidates, the reply to g8=N and the correction. Repeat with B's side to move and r1:6k1 | r2:6P1 | r3:8 | r4:8 | r5:8 | r6:8 | r7:8 | r8:5K2; the changed board tests transfer rather than diagram memory.
After the drill, compare your notes with Stalemate Trick, Underpromotion Tactic, En Passant Tactic through the line revealed after clearance. Keep A's rejected alternative beside B's chosen line Kh7; this shows whether the conclusion survived a new board signature.
Sources and scope
Sources for Promotion Tactic: 1chess.online editorial scope, FIDE Laws of Chess. Source ids are original-analysis, fide-laws. Primary evidence hook: fide-laws. Comparisons and practice notes are editorial. Evidence revision: 2026-08-remediation-r2.
Scope note for board pair r1:8 | r2:6Pk | r3:8 | r4:8 | r5:8 | r6:8 | r7:8 | r8:6K1 / r1:6k1 | r2:6P1 | r3:8 | r4:8 | r5:8 | r6:8 | r7:8 | r8:5K2: this page does not claim that g8=N 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 defender carrying two jobs.