Isinyathelo 3 · Okwabaqalayo
Cage Combinations (izinhlanganisela zesibaya): liyini leli qhinga? Indlela yokuxazulula i-Killer Sudoku
Ngesamba sesibaya nenani lezikwele zaso, linciphisa izinombolo ezingangena esibayeni; inombolo engekho kunoma iyiphi inhlanganisela engenzeka ayikwazi ukungena esibayeni.
Liyini leli qhinga
Izinombolo esibayeni (indawo ezungezwe ulayini wamachashazi) aziphindwa, futhi isamba sazo silingana nenombolo encane esekhoneni laso. Ngakho yizinhlanganisela ezimbalwa kuphela zezinombolo ezihlukene ezinganika leso samba.
Isibonelo: izikwele ezi-2 ezinesamba esingu-3 zingaba ngu-1+2 kuphela, izikwele ezi-2 ezinesamba esingu-17 ngu-8+9 kuphela, kanti izikwele ezi-3 ezinesamba esingu-7 ngu-1+2+4 kuphela.
Inombolo engekho kunoma iyiphi inhlanganisela ayikwazi ukungena esibayeni. Uma kusala isikwele esisodwa kuphela esingenalutho esibayeni, singu-isamba kukhishwe izinombolo esezikhona.
Ungalibona kanjani
Qala ngezibaya ezinesamba esincane kakhulu noma esikhulu kakhulu (izikwele ezi-2: 3, 4, 16, 17; izikwele ezi-3: 6, 7, 23, 24). Zinenhlanganisela eyodwa kuphela, ngakho zinciphisa izinketho ngokushesha.
Isibonelo
Izindawo ezizungezwe ulayini wamachashazi yizibaya, isamba sisekhoneni eliphezulu kwesokunxele. Izikwele eziphuzi zikhombisa ukuthi ubheke kuphi, ezisawolintshi ziyisizathu, izinombolo ezibomvu yizinombolo ezingenzeka ongazisusa, kanti inombolo eluhlaza okotshani iyimpendulo.
Esibayeni esingu-4 ku-M8K5, izikwele ezingu-2 (M8K5 no-M9K5) zinesamba esingu-4. Izinombolo esibayeni aziphindwa, ngakho funa izinombolo ezihlukene ezingu-2 ezihlangana zibe ngu-4. Amathuba kuphela yilawa: 1+3. Izinombolo ezingekho kunoma iyiphi yazo (2, 4, 5, 6, 7, 8 no-9) angeke zingene ezikweleni M8K5 no-M9K5. Futhi, uma M8K5=3, izikwele ezisele zesibaya bezingeke zigcwaliswe ngezinombolo zazo ezingenzeka, ngakho naleyo nombolo iyasuswa.
→ Ishadi lezinhlanganisela ze-Killer Sudoku: zonke izibaya (izikwele ezingu-2–9, zonke ezingu-502)