Quick answer
Protected Passed Pawn is an endgame technique: promotion race and tempo. Work from the first evidence position for Protected Passed Pawn, and begin by testing e4.
Begin from e4 in 8/8/3p4/8/8/4P3/5K1k/8 w - - 2 2. Count the material, king routes, promotion squares and reserve tempi before applying a theoretical rule. The evidence answer is: Protected Passed Pawn: calculate both promotion paths and include checks before assuming the faster pawn wins. Candidate line: e4.
In the Protected Passed Pawn example, notice: side White; pieces Black pawn d6, White pawn e3, White king f2, Black king h2; legal first moves e4, Kf3, Kf1, Ke1, Ke2. Read those squares as a snapshot of this single board, not as a standing rule you can copy into every game.
Material and result question
The first evidence board tests promotion race and tempo; the second board tests promotion race and tempo. Sequence A is direct FEN setup. Sequence B is direct FEN setup. Compare them only after setting both FENs. The Chess Wiki and the Endgames hub collect the shared vocabulary. Then compare Material Values with Pawn Race Calculation, Connected Passed Pawns, Rook Versus Pawn around the pawn's promotion square.
The two inventories make the distinction concrete. A contains side White; pieces Black pawn d6, White pawn e3, White king f2, Black king h2; legal first moves e4, Kf3, Kf1, Ke1, Ke2; B contains side Black; pieces Black pawn d6, White pawn e3, White king e2, Black king g2; legal first moves d5, Kg3, Kh3, Kh2, Kh1, Kg1. Compare the side to move before comparing the labels in the context of the defender's fortress setup.
Topic dossier for this page and board pair r1:8 | r2:8 | r3:3p4 | r4:8 | r5:8 | r6:4P3 | r7:5K1k | r8:8 / r1:8 | r2:8 | r3:3p4 | r4:8 | r5:8 | r6:4P3 | r7:4K1k1 | r8:8: start with the pawn's promotion square; then test the defender's fortress setup; keep an outside passer used as a decoy separate from the defender's only active counterplay; use the active rook before the pawn push as the transfer check; and reserve the conversion move order for the exception.
Conversion or defense plan
On the first board, calculate e4 after e4 and write down the opponent's best reply around the pawn's promotion square. On the second board, calculate d5 after d5 and check the defender's fortress setup. Separate the practical conversion question from the result question; side to move and one checking distance can change the conclusion. In this case the useful condition is the conversion move order.
Key claim: Protected Passed Pawn is illustrated here by promotion race and tempo; the first concrete test is e4. The board anchor is 8/8/3p4/8/8/4P3/5K1k/8; the example is intentionally narrower than the topic label and should not be generalised without checking the surrounding position..
Practical boundary: To answer “What exact king, pawn, and move-order conditions decide protected passed pawn, and how should each side play them?”, compare the recorded setup with d5 and the opponent's reply. The decision is useful only when the stated condition survives that concrete test on board 8/8/3p4/8/8/4P3/4K1k1/8. The evidence records No tablebase outcome is asserted by this generated record; verify the exact FEN before publication and the second board signature r1:8 | r2:8 | r3:3p4 | r4:8 | r5:8 | r6:4P3 | r7:4K1k1 | r8:8. The false-positive test is whether an outside passer used as a decoy appears without the defender's only active counterplay, so the conclusion is useful only when the stated condition survives that concrete test.
Evidence positions
example-1: promotion race and tempo
Show answer
Protected Passed Pawn: calculate both promotion paths and include checks before assuming the faster pawn wins. Candidate line: e4.
Why this position is here: Protected Passed Pawn is represented by promotion race and tempo. This is a direct FEN setup with board anchor 8/8/3p4/8/8/4P3/5K1k/8; no opening history is inferred from the diagram.
FEN: 8/8/3p4/8/8/4P3/5K1k/8 w - - 2 2
Question: What is the first concrete decision in this protected passed pawn position?
Answer cue: Protected Passed Pawn: calculate both promotion paths and include checks before assuming the faster pawn wins. Candidate line: e4. The first candidate to test is e4. Replay e4 on board anchor 8/8/3p4/8/8/4P3/5K1k/8 and write down what changes after it.
Evidence boundary: No tablebase outcome is asserted by this generated record; verify the exact FEN before publication.
example-2: promotion race and tempo
Show answer
Protected Passed Pawn: calculate both promotion paths and include checks before assuming the faster pawn wins. Candidate line: d5.
Why this position is here: Protected Passed Pawn is represented by promotion race and tempo. This is a direct FEN setup with board anchor 8/8/3p4/8/8/4P3/4K1k1/8; no opening history is inferred from the diagram.
FEN: 8/8/3p4/8/8/4P3/4K1k1/8 b - - 3 2
Question: What is the first concrete decision in this protected passed pawn position?
Answer cue: Protected Passed Pawn: calculate both promotion paths and include checks before assuming the faster pawn wins. Candidate line: d5. The first candidate to test is d5. Replay d5 on board anchor 8/8/3p4/8/8/4P3/4K1k1/8 and write down what changes after it.
Evidence boundary: No tablebase outcome is asserted by this generated record; verify the exact FEN before publication.
example-3: promotion race and tempo
Show answer
Protected Passed Pawn: calculate both promotion paths and include checks before assuming the faster pawn wins. Candidate line: e4.
Why this position is here: Protected Passed Pawn is represented by promotion race and tempo. This is a direct FEN setup with board anchor 8/8/8/3p4/8/4P3/8/5K1k; no opening history is inferred from the diagram.
FEN: 8/8/8/3p4/8/4P3/8/5K1k w - - 0 2
Question: What is the first concrete decision in this protected passed pawn position?
Answer cue: Protected Passed Pawn: calculate both promotion paths and include checks before assuming the faster pawn wins. Candidate line: e4. The first candidate to test is e4. Replay e4 on board anchor 8/8/8/3p4/8/4P3/8/5K1k and write down what changes after it.
Evidence boundary: No tablebase outcome is asserted by this generated record; verify the exact FEN before publication.
Reading the line
Read the first example (id example-1) as a complete record: continuation e4, source tablebase. This is a direct FEN setup with board anchor 8/8/3p4/8/8/4P3/5K1k/8; no opening history is inferred from the diagram. If A does not expose promotion race and tempo, correct the evidence before relying on the prose.
Read the second example (id example-2) separately: continuation d5, source tablebase. Its feature is promotion race and tempo; inventory side Black; pieces Black pawn d6, White pawn e3, White king e2, Black king g2; legal first moves d5, Kg3, Kh3, Kh2, Kh1, Kg1. Compare what changes between e4 and d5.
Boundary cases
The main mistake to avoid with Protected Passed Pawn is applying a remembered endgame rule while ignoring side to move, king placement or an unverified result. In A, the missing condition must be located in r1:8 | r2:8 | r3:3p4 | r4:8 | r5:8 | r6:4P3 | r7:5K1k | r8:8 after e4; in B, test it against r1:8 | r2:8 | r3:3p4 | r4:8 | r5:8 | r6:4P3 | r7:4K1k1 | r8:8 after d5.
For Protected Passed Pawn, the first board's evidence boundary (after e4) is No tablebase outcome is asserted by this generated record; verify the exact FEN before publication. The second board's evidence boundary for Protected Passed Pawn is No tablebase outcome is asserted by this generated record; verify the exact FEN before publication. If a trusted source or careful calculation changes the conclusion around the active rook before the pawn push, update both the evidence record and this article.
Practice from a real game
play the position for both sides, record the critical tempo, and verify the exact FEN against the cited tablebase before publication. Start with A's side to move and r1:8 | r2:8 | r3:3p4 | r4:8 | r5:8 | r6:4P3 | r7:5K1k | r8:8; record two candidates, the reply to e4 and the correction. Repeat with B's side to move and r1:8 | r2:8 | r3:3p4 | r4:8 | r5:8 | r6:4P3 | r7:4K1k1 | r8:8; the changed board tests transfer rather than diagram memory.
After the drill, compare your notes with Pawn Race Calculation, Connected Passed Pawns, Rook Versus Pawn through the defender's only active counterplay. Keep A's rejected alternative beside B's chosen line d5; this shows whether the conclusion survived a new board signature.
Sources and scope
Sources for Protected Passed Pawn: Syzygy tablebase verification reference, 1chess.online editorial scope. Source ids are tablebase, original-analysis. Primary evidence hook: tablebase. Comparisons and practice notes are editorial. Evidence revision: 2026-08-remediation-r2.
Scope note for board pair r1:8 | r2:8 | r3:3p4 | r4:8 | r5:8 | r6:4P3 | r7:5K1k | r8:8 / r1:8 | r2:8 | r3:3p4 | r4:8 | r5:8 | r6:4P3 | r7:4K1k1 | 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 an outside passer used as a decoy.