Quick answer
Capture Notation is a rules question: a position reconstructed from notation. Work from the first evidence position for Capture Notation, and begin by testing Rg5.
Begin from Rg5 in 8/5k2/8/8/6R1/8/5K2/8 w - - 4 3. Read the side to move, legal conditions, history fields and procedural distinction before relying on a shortcut. The evidence answer is: Capture Notation: preserve side to move, check markers and move numbering while rebuilding the board. Candidate line: Rg5.
In the Capture Notation example, notice: side White; pieces Black king f7, White rook g4, White king f2; legal first moves Rg5, Rg6, Rg7+, Rg8, Rh4, Rg3, Rg2, Rg1. The listed material and candidate moves belong only to this FEN example and should not be generalised.
The exact condition
The first evidence board tests a position reconstructed; the second board tests a position reconstructed. 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 Check And Checkmate Symbols, Game Result Markers, Chess Annotation Symbols around the halfmove clock field.
The two inventories make the distinction concrete. A contains side White; pieces Black king f7, White rook g4, White king f2; legal first moves Rg5, Rg6, Rg7+, Rg8, Rh4, Rg3, Rg2, Rg1; B contains side White; pieces Black king e7, White rook g4, White king e2; legal first moves Rg5, Rg6, Rg7+, Rg8, Rh4, Rg3, Rg2, Rg1. Compare the side to move before comparing the labels in the context of the history that changes a right.
Topic dossier for this page and board pair r1:8 | r2:5k2 | r3:8 | r4:8 | r5:6R1 | r6:8 | r7:5K2 | r8:8 / r1:8 | r2:4k3 | r3:8 | r4:8 | r5:6R1 | r6:8 | r7:4K3 | r8:8: start with the halfmove clock field; then test the history that changes a right; keep a malformed game record separate from the identity used for repetition; use the clock state at flag fall as the transfer check; and reserve the promotion choice at the board for the exception.
Procedure and counterexample
On the first board, calculate Rg5 after Rg5 and write down the opponent's best reply around the halfmove clock field. On the second board, calculate Kd2 after Kd2 and check the history that changes a right. Separate what the board proves from what only the move record, clock or arbiter can establish. In this case the useful condition is the promotion choice at the board.
Key claim: Capture Notation is illustrated here by a position reconstructed from notation; the first concrete test is Rg5. The board anchor is 8/5k2/8/8/6R1/8/5K2/8; 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 capture notation legal, what exceptions matter, and how can a player verify the rule at the board?”, compare the recorded setup with Kd2 and the opponent's reply. The decision is useful only when the stated condition survives that concrete test on board 8/4k3/8/8/6R1/8/4K3/8. 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 r1:8 | r2:4k3 | r3:8 | r4:8 | r5:6R1 | r6:8 | r7:4K3 | r8:8. The false-positive test is whether a malformed game record appears without the identity used for repetition, so the conclusion is useful only when the stated condition survives that concrete test.
Evidence positions
example-1: a position reconstructed from notation
Show answer
Capture Notation: preserve side to move, check markers and move numbering while rebuilding the board. Candidate line: Rg5.
Why this position is here: Capture Notation is represented by a position reconstructed from notation. This is a direct FEN setup with board anchor 8/5k2/8/8/6R1/8/5K2/8; no opening history is inferred from the diagram.
FEN: 8/5k2/8/8/6R1/8/5K2/8 w - - 4 3
Question: What is the first concrete decision in this capture notation position?
Answer cue: Capture Notation: preserve side to move, check markers and move numbering while rebuilding the board. Candidate line: Rg5. The first candidate to test is Rg5. Replay Rg5 on board anchor 8/5k2/8/8/6R1/8/5K2/8 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.
example-2: a position reconstructed from notation
Show answer
Capture Notation: preserve side to move, check markers and move numbering while rebuilding the board. Candidate line: Kd2.
Why this position is here: Capture Notation is represented by a position reconstructed from notation. This is a direct FEN setup with board anchor 8/4k3/8/8/6R1/8/4K3/8; no opening history is inferred from the diagram.
FEN: 8/4k3/8/8/6R1/8/4K3/8 w - - 6 4
Question: What is the first concrete decision in this capture notation position?
Answer cue: Capture Notation: preserve side to move, check markers and move numbering while rebuilding the board. Candidate line: Kd2. The first candidate to test is Kd2. Replay Kd2 on board anchor 8/4k3/8/8/6R1/8/4K3/8 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 Rg5, source pgn-specification. This is a direct FEN setup with board anchor 8/5k2/8/8/6R1/8/5K2/8; no opening history is inferred from the diagram. If A does not expose a position reconstructed from notation, correct the evidence before relying on the prose.
Read the second example (id example-2) separately: continuation Kd2, source pgn-specification. Its feature is a position reconstructed from notation; inventory side White; pieces Black king e7, White rook g4, White king e2; legal first moves Rg5, Rg6, Rg7+, Rg8, Rh4, Rg3, Rg2, Rg1. Compare what changes between Rg5 and Kd2.
Common confusions
The main mistake to avoid with Capture Notation 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 | r2:5k2 | r3:8 | r4:8 | r5:6R1 | r6:8 | r7:5K2 | r8:8 after Rg5; in B, test it against r1:8 | r2:4k3 | r3:8 | r4:8 | r5:6R1 | r6:8 | r7:4K3 | r8:8 after Kd2.
For Capture Notation, the first board's evidence boundary (after Rg5) 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 Capture Notation 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 clock state at flag fall, 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 | r2:5k2 | r3:8 | r4:8 | r5:6R1 | r6:8 | r7:5K2 | r8:8; record two candidates, the reply to Rg5 and the correction. Repeat with B's side to move and r1:8 | r2:4k3 | r3:8 | r4:8 | r5:6R1 | r6:8 | r7:4K3 | r8:8; the changed board tests transfer rather than diagram memory.
After the drill, compare your notes with Check And Checkmate Symbols, Game Result Markers, Chess Annotation Symbols through the identity used for repetition. Keep A's rejected alternative beside B's chosen line Kd2; this shows whether the conclusion survived a new board signature.
Sources and scope
Sources for Capture Notation: FIDE Laws of Chess, 1chess.online editorial scope, Portable Game Notation Specification. Source ids are fide-laws, original-analysis, pgn-specification. Primary evidence hook: pgn-specification. Comparisons and practice notes are editorial. Evidence revision: 2026-08-remediation-r2.
Scope note for board pair r1:8 | r2:5k2 | r3:8 | r4:8 | r5:6R1 | r6:8 | r7:5K2 | r8:8 / r1:8 | r2:4k3 | r3:8 | r4:8 | r5:6R1 | r6:8 | r7:4K3 | r8:8: this page does not claim that Rg5 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 a malformed game record.