Quick answer
Move List Comparison is a practical chess tool: Move List Comparison input/output contract. Work from the first evidence position for Move List Comparison, and begin by testing Kd2.
Begin from Kd2 in 8/3k4/8/8/5R2/8/8/4K3 w - - 2 2. State the input contract, output assumptions, edge cases and human decision that follows the tool response. The evidence answer is: Move List Comparison: state the input, expected output and the edge case before trusting the tool. Candidate line: Kd2.
In the Move List Comparison example, notice: side White; pieces Black king d7, White rook f4, White king e1; legal first moves Rf5, Rf6, Rf7+, Rf8, Rg4, Rh4, Rf3, Rf2. Do not export this inventory beyond the present example; it is a local observation, not a doctrine.
Input and output contract
The first evidence board tests Move List Comparison input/output contract; the second board tests Move List Comparison input/output contract. Construction note: A = direct FEN setup; B = direct FEN setup. Rebuild each board before comparing labels. Hub vocabulary: Chess Wiki · Notation And Tools hub. Then compare Fen Viewer with Study Session Planner, Candidate Move Tracker, Tournament Time Control Planner around the decision after the tool responds.
The two inventories make the distinction concrete. A contains side White; pieces Black king d7, White rook f4, White king e1; legal first moves Rf5, Rf6, Rf7+, Rf8, Rg4, Rh4, Rf3, Rf2; B contains side White; pieces Black king d7, White rook f4, White king e1; legal first moves Rf5, Rf6, Rf7+, Rf8, Rg4, Rh4, Rf3, Rf2. Compare the side to move before comparing the labels in the context of a deliberately bad input.
Topic dossier for this page and board pair r1:8 | r2:3k4 | r3:8 | r4:8 | r5:5R2 | r6:8 | r7:8 | r8:4K3 / r1:8 | r2:3k4 | r3:8 | r4:8 | r5:5R2 | r6:8 | r7:8 | r8:4K3: start with the decision after the tool responds; then test a deliberately bad input; keep the field that must be preserved separate from side-to-move interpretation; use a repeatable workflow as the transfer check; and reserve a comparison with a known result for the exception.
Human decision after the result
On the first board, calculate Kd2 after Kd2 and write down the opponent's best reply around the decision after the tool responds. On the second board, calculate Kd2 after Kd2 and check a deliberately bad input. Use the tool to expose a position or comparison, then audit the input and decide what the output does and does not establish. In this case the useful condition is a comparison with a known result.
Key claim: Move List Comparison is illustrated here by Move List Comparison input/output contract; the first concrete test is Kd2. The board anchor is 8/3k4/8/8/5R2/8/8/4K3; 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 use move list comparison with valid inputs, meaningful outputs, and a safe fallback when the tool is uncertain?”, 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 8/3k4/8/8/5R2/8/8/4K3. 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 r1:8 | r2:3k4 | r3:8 | r4:8 | r5:5R2 | r6:8 | r7:8 | r8:4K3. The false-positive test is whether the field that must be preserved appears without side-to-move interpretation, so the conclusion is useful only when the stated condition survives that concrete test.
Evidence positions
example-1: Move List Comparison input/output contract
Show answer
Move List Comparison: state the input, expected output and the edge case before trusting the tool. Candidate line: Kd2.
Why this position is here: Move List Comparison is represented by Move List Comparison input/output contract. This is a direct FEN setup with board anchor 8/3k4/8/8/5R2/8/8/4K3; no opening history is inferred from the diagram.
FEN: 8/3k4/8/8/5R2/8/8/4K3 w - - 2 2
Question: What is the first concrete decision in this move list comparison position?
Answer cue: Move List Comparison: state the input, expected output and the edge case before trusting the tool. Candidate line: Kd2. The first candidate to test is Kd2. Replay Kd2 on board anchor 8/3k4/8/8/5R2/8/8/4K3 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 test case
Read the first example (id example-1) as a complete record: continuation Kd2, source pgn-specification. This is a direct FEN setup with board anchor 8/3k4/8/8/5R2/8/8/4K3; no opening history is inferred from the diagram. If A does not expose Move List Comparison input/output contract, correct the evidence before relying on the prose.
Read the second example (id example-1) separately: continuation Kd2, source pgn-specification. Its feature is Move List Comparison input/output contract; inventory side White; pieces Black king d7, White rook f4, White king e1; legal first moves Rf5, Rf6, Rf7+, Rf8, Rg4, Rh4, Rf3, Rf2. Compare what changes between Kd2 and Kd2.
Failure modes
The main mistake to avoid with Move List Comparison is trusting a convenient output without checking the position, input format or limitations hidden by the interface. In A, the missing condition must be located in r1:8 | r2:3k4 | r3:8 | r4:8 | r5:5R2 | r6:8 | r7:8 | r8:4K3 after Kd2; in B, test it against r1:8 | r2:3k4 | r3:8 | r4:8 | r5:5R2 | r6:8 | r7:8 | r8:4K3 after Kd2.
For Move List Comparison, the first board's evidence boundary (after Kd2) 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 Move List Comparison 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 a repeatable workflow, update both the evidence record and this article.
Practice protocol
run the workflow on a known position, one edge case and one invalid input; save the result and the reason for each outcome. Start with A's side to move and r1:8 | r2:3k4 | r3:8 | r4:8 | r5:5R2 | r6:8 | r7:8 | r8:4K3; record two candidates, the reply to Kd2 and the correction. Repeat with B's side to move and r1:8 | r2:3k4 | r3:8 | r4:8 | r5:5R2 | r6:8 | r7:8 | r8:4K3; the changed board tests transfer rather than diagram memory.
After the drill, compare your notes with Study Session Planner, Candidate Move Tracker, Tournament Time Control Planner through side-to-move interpretation. 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 Move List Comparison: 1chess.online editorial scope, Portable Game Notation Specification. Source ids are 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 | r2:3k4 | r3:8 | r4:8 | r5:5R2 | r6:8 | r7:8 | r8:4K3 / r1:8 | r2:3k4 | r3:8 | r4:8 | r5:5R2 | r6:8 | r7:8 | r8:4K3: this page does not claim that Kd2 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 field that must be preserved.