Isinyathelo 5 · Okuphakathi
Cage Pointing (isibaya esikhombayo): liyini leli qhinga? Indlela yokuxazulula i-Killer Sudoku
Uma inombolo kufanele ingene esibayeni futhi zonke izikwele zayo ezingenzeka lapho zisemugqeni owodwa, ekholomini eyodwa noma ebhokisini elilodwa, ungayisusa leyo nombolo kuyo yonke enye ingxenye yawo ngaphandle kwesibaya.
Liyini leli qhinga
Inombolo ekuzo zonke izinhlanganisela zesibaya kufanele ingene kuleso sibaya.
Uma zonke izikwele zesibaya lapho leyo nombolo ingangena khona zisemugqeni owodwa (ekholomini noma ebhokisini), leyo nombolo ayikwazi ukungena kwenye ingxenye yalowo mugqa engaphandle kwesibaya.
Isibonelo: isibaya sezikwele ezi-2 esinesamba esingu-3 emugqeni owodwa sigcwaliswa ngu-1 no-2, ngakho asikho esinye isikwele kulowo mugqa esingaba ngu-1 noma u-2.
Okuphambene: uma zonke izindawo zenombolo emugqeni zingaphakathi esibayeni esisodwa, leso sibaya kufanele sibe nayo leyo nombolo.
Ungalibona kanjani
Uma isibaya esincane (noma esikhulu) kufanele sibe nenombolo ethile, hlola ukuthi izikwele okungenzeka zayo esibayeni ziqondene yini.
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.
Inhlanganisela eyodwa yesibaya esingu-24 ku-M3K6 ngu-7+9, futhi inaye u-7, ngakho u-7 kufanele angene ndawo thize kulesi sibaya. Ngaphakathi esibayeni, u-7 angangena kuphela ezikweleni M3K6 no-M4K6, futhi zonke zisekholomini 6. Ngakho u-7 angeke angene kwezinye izikwele ekholomini 6 ezingaphandle kwesibaya (M1K6, M2K6, M5K6, M6K6 no-M7K6).
→ Ishadi lezinhlanganisela ze-Killer Sudoku: zonke izibaya (izikwele ezingu-2–9, zonke ezingu-502)