Quick answer
Mating Net is a tactical idea: a restricted king and a mating net. Work from the first evidence position for Mating Net, and begin by testing Kg8.
Begin from Kg8 in 8/7k/6pp/5p2/6P1/5N1P/1B3P2/6K1 b - - 0 3. Start with the forcing geometry: checks, captures, threats, defenders and flight squares around the target. The evidence answer is: Mating Net: count flight squares, defenders and forcing checks before calling the pattern a mate. Candidate line: Kg8.
In the Mating Net example, notice: side Black; pieces Black king h7, Black pawn g6, Black pawn h6, Black pawn f5, White pawn g4, White knight f3, White pawn h3, White bishop b2, White pawn f2, White king g1; legal first moves Kg8, g5, h5, f4, fxg4. Keep the piece census tied to this diagram—other positions with the same theme can look completely different.
The tactical trigger
The first evidence board tests a restricted king and a mating net; the second board tests a restricted king and a mating net. Construction note: A = direct FEN setup; B = direct FEN setup. Rebuild each board before comparing labels. Hub vocabulary: Chess Wiki · Tactics hub. Then compare Candidate Moves with Triple Attack, Perpetual Check, Stalemate Trick around the order of checks before captures.
The two inventories make the distinction concrete. A contains side Black; pieces Black king h7, Black pawn g6, Black pawn h6, Black pawn f5, White pawn g4, White knight f3, White pawn h3, White bishop b2, White pawn f2, White king g1; legal first moves Kg8, g5, h5, f4, fxg4; B contains side Black; pieces Black king g8, Black pawn f6, Black pawn g6, Black pawn h6, White knight e5, White pawn f2, White pawn g2, White pawn h2, White bishop e1, White king g1; legal first moves Kh8, Kh7, Kg7, Kf8, f5, fxe5, g5, h5. Compare the side to move before comparing the labels in the context of the loose unit behind the target.
Topic dossier for this page and board pair r1:8 | r2:7k | r3:6pp | r4:5p2 | r5:6P1 | r6:5N1P | r7:1B3P2 | r8:6K1 / r1:6k1 | r2:8 | r3:5ppp | r4:4N3 | r5:8 | r6:8 | r7:5PPP | r8:4B1K1: start with the order of checks before captures; then test the loose unit behind the target; keep a decoy square separate from the move that closes counterplay; use a quiet threat after the forcing move as the transfer check; and reserve an in-between move before recapture for the exception.
Calculation order
On the first board, calculate Kg8 after Kg8 and write down the opponent's best reply around the order of checks before captures. On the second board, calculate Kh8 after Kh8 and check the loose unit behind the target. 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 an in-between move before recapture.
Key claim: Mating Net is illustrated here by a restricted king and a mating net; the first concrete test is Kg8. The board anchor is 8/7k/6pp/5p2/6P1/5N1P/1B3P2/6K1; 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 mating net, calculate the winning idea, and test the defender's best resource?”, compare the recorded setup with Kh8 and the opponent's reply. The decision is useful only when the stated condition survives that concrete test on board 6k1/8/5ppp/4N3/8/8/5PPP/4B1K1. 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 | r2:8 | r3:5ppp | r4:4N3 | r5:8 | r6:8 | r7:5PPP | r8:4B1K1. The false-positive test is whether a decoy square appears without the move that closes counterplay, so the conclusion is useful only when the stated condition survives that concrete test.
Evidence positions
example-1: a restricted king and a mating net
Show answer
Mating Net: count flight squares, defenders and forcing checks before calling the pattern a mate. Candidate line: Kg8.
Why this position is here: Mating Net is represented by a restricted king and a mating net. This is a direct FEN setup with board anchor 8/7k/6pp/5p2/6P1/5N1P/1B3P2/6K1; no opening history is inferred from the diagram.
FEN: 8/7k/6pp/5p2/6P1/5N1P/1B3P2/6K1 b - - 0 3
Question: What is the first concrete decision in this mating net position?
Answer cue: Mating Net: count flight squares, defenders and forcing checks before calling the pattern a mate. Candidate line: Kg8. The first candidate to test is Kg8. Replay Kg8 on board anchor 8/7k/6pp/5p2/6P1/5N1P/1B3P2/6K1 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 restricted king and a mating net
Show answer
Mating Net: count flight squares, defenders and forcing checks before calling the pattern a mate. Candidate line: Kh8.
Why this position is here: Mating Net is represented by a restricted king and a mating net. This is a direct FEN setup with board anchor 6k1/8/5ppp/4N3/8/8/5PPP/4B1K1; no opening history is inferred from the diagram.
FEN: 6k1/8/5ppp/4N3/8/8/5PPP/4B1K1 b - - 3 2
Question: What is the first concrete decision in this mating net position?
Answer cue: Mating Net: count flight squares, defenders and forcing checks before calling the pattern a mate. Candidate line: Kh8. The first candidate to test is Kh8. Replay Kh8 on board anchor 6k1/8/5ppp/4N3/8/8/5PPP/4B1K1 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 restricted king and a mating net
Show answer
Mating Net: count flight squares, defenders and forcing checks before calling the pattern a mate. Candidate line: Bf4.
Why this position is here: Mating Net is represented by a restricted king and a mating net. This is a direct FEN setup with board anchor 6k1/8/5ppp/4B1N1/8/8/5PPP/6K1; no opening history is inferred from the diagram.
FEN: 6k1/8/5ppp/4B1N1/8/8/5PPP/6K1 w - - 4 3
Question: What is the first concrete decision in this mating net position?
Answer cue: Mating Net: count flight squares, defenders and forcing checks before calling the pattern a mate. Candidate line: Bf4. The first candidate to test is Bf4. Replay Bf4 on board anchor 6k1/8/5ppp/4B1N1/8/8/5PPP/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 Kg8, source fide-laws. This is a direct FEN setup with board anchor 8/7k/6pp/5p2/6P1/5N1P/1B3P2/6K1; no opening history is inferred from the diagram. If A does not expose a restricted king and a mating net, correct the evidence before relying on the prose.
Read the second example (id example-2) separately: continuation Kh8, source fide-laws. Its feature is a restricted king and a mating net; inventory side Black; pieces Black king g8, Black pawn f6, Black pawn g6, Black pawn h6, White knight e5, White pawn f2, White pawn g2, White pawn h2, White bishop e1, White king g1; legal first moves Kh8, Kh7, Kg7, Kf8, f5, fxe5, g5, h5. Compare what changes between Kg8 and Kh8.
The defensive resource
The main mistake to avoid with Mating Net 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 | r2:7k | r3:6pp | r4:5p2 | r5:6P1 | r6:5N1P | r7:1B3P2 | r8:6K1 after Kg8; in B, test it against r1:6k1 | r2:8 | r3:5ppp | r4:4N3 | r5:8 | r6:8 | r7:5PPP | r8:4B1K1 after Kh8.
For Mating Net, the first board's evidence boundary (after Kg8) 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 Mating Net 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 quiet threat after the forcing move, 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 | r2:7k | r3:6pp | r4:5p2 | r5:6P1 | r6:5N1P | r7:1B3P2 | r8:6K1; record two candidates, the reply to Kg8 and the correction. Repeat with B's side to move and r1:6k1 | r2:8 | r3:5ppp | r4:4N3 | r5:8 | r6:8 | r7:5PPP | r8:4B1K1; the changed board tests transfer rather than diagram memory.
After the drill, compare your notes with Triple Attack, Perpetual Check, Stalemate Trick through the move that closes counterplay. Keep A's rejected alternative beside B's chosen line Kh8; this shows whether the conclusion survived a new board signature.
Sources and scope
Sources for Mating Net: 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 | r2:7k | r3:6pp | r4:5p2 | r5:6P1 | r6:5N1P | r7:1B3P2 | r8:6K1 / r1:6k1 | r2:8 | r3:5ppp | r4:4N3 | r5:8 | r6:8 | r7:5PPP | r8:4B1K1: this page does not claim that Kg8 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 decoy square.