Isinyathelo 13 · Okochwepheshe
X-Wing: liyini leli qhinga? Indlela yokuxazulula i-Killer Sudoku
Uma inombolo inezindawo ezimbili kuphela emugqeni ngamunye kwemibili, futhi lezo zikwele ziqondene emakholomini amabili afanayo, ungasusa leyo nombolo kwezinye izikwele zalawo makholomu amabili (kuyasebenza nalapho imigqa namakholomu kushintshaniswa).
Liyini leli qhinga
Cabanga ngenombolo eyodwa kuphela (isib. u-4).
① Emigqeni emibili, u-4 ungena ezikweleni ezimbili ncamashí kulowo nalowo.
② Lezo zikwele ziqondene emakholomini amabili afanayo, ngakho izikwele ezine zakha amakhona onxande.
Khona-ke u-4 uya kumakhona amabili aphambene ngokutshekile: phezulu kwesobunxele + phansi kwesokudla, noma phezulu kwesokudla + phansi kwesobunxele.
Noma kunjani, o-4 balawo makholomu amabili basetshenziswa ngaphakathi kunxande. Ngakho asikho esinye isikwele kulawo makholomu amabili esingaba ngu-4.
Ungalibona kanjani
Khetha inombolo eyodwa bese uthola umugqa onezindawo ezimbili zayo ncamashí. Uma omunye umugqa unezindawo zawo ezimbili emakholomini amabili afanayo, kuyi-X-Wing (imigqa namakholomu kungashintshaniswa).
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.
Cabanga ngo-7 kuphela. Kokubili ekholomini 5 nasekholomini 9, u-7 angangena kuphela emugqeni 7 noma emugqeni 8 (M7K5, M8K5, M7K9 no-M8K9). Lezi zikwele ezine ngamakhona onxande, futhi u-7 uya kumakhona amabili aphambene ngokutshekile. Noma kunjani, o-7 bomugqa 7 nomugqa 8 basetshenziswa yilezi zikwele ezine, ngakho ezinye izikwele zomugqa 7 nomugqa 8 (M8K6) angeke zibe ngu-7.