Expert Anti-Koning Sudoku
Geen twee identieke cijfers mogen diagonaal aanraken (zoals een schaakkoningzet). Elke cel heeft tot 8 beperkte buren.
Expert Anti-Koning Sudoku. Elke plaatsing wordt gedwongen door verweven diagonale en standaard logica. De moeilijkste anti-koning puzzels op de site — niet raden vereist.
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9
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5
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9
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6
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Wat is Anti-Koning Sudoku?
Moeilijkheidsgraad
★★★☆☆
3/5
Beperkingstype
Anti-Beperkingen
Typische Gegeven Cijfers
22–28
Gem. Oplossing (Expert)
48 min
Oplostechnieken voor Expert Niveau
| Techniek | Beschrijving | Niveau |
|---|---|---|
| Diagonal Exclusion | The king constraint extends the exclusion zone to all 8 neighbours including diagonals. Apply diagonal exclusions before standard row/col/box logic. | Beginner |
| Corner Restriction | Corner cells (e.g., r1c1) only have 3 king-move neighbours. Start with corners and edges to build initial placements. | Gemiddeld |
| King-Chain Elimination | When a digit is placed, eliminate it simultaneously from all 8 surrounding cells. | Gemiddeld |
| Parity via King's Move | In Anti-King, consecutive digits often become mutually king-move incompatible — trace valid placement paths using this property. | Gevorderd |
Technieken om te beheersen op Expert
- X-Wing-techniek — At expert level, combine the fish with king logic: an X-Wing corner placement also clears the digit from eight surrounding cells, often collapsing a whole region.
- Swordfish technique — Expert Anti-King puzzles thin candidates with diagonal pressure until three-row Swordfish patterns become the only path — look for them on digits clustered near the grid centre.
Gemiddelde Oplossingstijd per Moeilijkheidsgraad
Gemakkelijk
5 min
Gemiddeld
13 min
Moeilijk
26 min
Expert
48 min
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Gerelateerde Varianten
Anti-Ridder Sudoku
The companion chess constraint — the forbidden repeat jumps a knight's move instead of one diagonal step.
Anti-Opeenvolgend Sudoku
Forbids a value relationship instead of a position: neighbours may touch, but their digits can't be consecutive.
Niet-opeenvolgend Sudoku
Another global anti-rule solved with the same reflex — every placement immediately bans candidates around it.
Veelgestelde Vragen — Expert Anti-Koning Sudoku
Meer vragen? Zie de volledige Anti-Koning Sudoku gids.