Ky thuat Sudoku nang cao: Giai thich X-Wing, Swordfish va XY-Wing

Vuot qua nhung dieu co ban

Neu ban da giai sudoku mot thoi gian, ban co the da gap buc tuong ma cac ky thuat co ban nhu quet, naked single va hidden single khong con du. Ba ky thuat nang cao quan trong nhat la X-Wing, Swordfish va XY-Wing. Thanh thao cac mau nay se mo khoa nhung cau do tuong chung bat kha thi va mang lai loi the khi thi dau tren Sudoku Rival.

Hieu ve loai bo ung vien

Tat ca ky thuat nang cao deu chia se mot muc tieu: loai bo ung vien. Khac voi phuong phap co ban dat so truc tiep, ky thuat nang cao loai bo kha nang tu cac o. Bang cach thu hep ung vien, ban cuoi cung se lo ra naked hoac hidden single.

Ky thuat X-Wing

X-Wing la gi?

Mau X-Wing xuat hien khi mot ung vien cu the chi xuat hien o dung hai o trong moi hang cua hai hang khac nhau, va nhung o do nam tren cung hai cot. Bon o tao thanh mot hinh chu nhat. Ban co the loai bo ung vien do tu tat ca cac o khac trong hai cot do.

Cach nhan biet X-Wing

Bat dau kiem tra ghi chu but chi cho mot so. Tim nhung hang ma so do chi la ung vien o dung hai o. Neu tim thay hai hang nhu vay va cac o ung vien nam tren cung hai cot, ban co X-Wing.

Vi du X-Wing

So 5 la ung vien o Hang 2 (cot 3 va 7) va Hang 8 (cung cot 3 va 7). Bon o tao hinh chu nhat. Ban co the xoa 5 tu moi o khac trong cot 3 va 7.

Ky thuat Swordfish

Swordfish la gi?

Swordfish la mo rong cua X-Wing qua ba hang va ba cot. Mot ung vien xuat hien o hai hoac ba o trong ba hang khac nhau, va tat ca o do nam trong cung ba cot.

Cach nhan biet Swordfish

Chon mot ung vien va xem tung hang. Tim ba hang ma ung vien nam trong cung ba cot. Mau khong can la hinh chu nhat hoan hao.

Vi du Swordfish

So 7 la ung vien o Hang 1 cot 2 va 5, Hang 4 cot 2 va 9, Hang 7 cot 5 va 9. Tat ca nam trong cot 2, 5 va 9 — mot Swordfish. Xoa 7 tu moi o khac trong cot 2, 5 va 9.

Ky thuat XY-Wing

XY-Wing la gi?

XY-Wing lien quan den ba o, moi o co dung hai ung vien. Mot o la "tru" va hai o la "kep". Tru chia se mot ung vien voi moi kep, va hai kep chia se mot ung vien chung ma tru khong co. Bat ky o nao thay ca hai kep co the loai bo ung vien chung do.

Cach nhan biet XY-Wing

Tim mot o co dung hai ung vien, vi du X va Y. Day la tru tiem nang. Tim hai o ma tru thay — mot co X va Z, mot co Y va Z. Ung vien Z la ung vien chung. Bat ky o nao thay ca hai kep khong the chua Z.

Vi du XY-Wing

O R1C1 co {3, 5}. O R1C7 co {3, 8}. O R5C1 co {5, 8}. R1C1 la tru. Ung vien chung la 8. Bat ky o nao thay ca R1C7 va R5C1 khong the chua 8.

Ket hop tat ca

Chia khoa de thanh thao ky thuat nang cao la luyen tap va kien nhan. Bat dau voi X-Wing vi de nhan biet nhat. Khi thoai mai, chuyen sang Swordfish roi XY-Wing. Su dung Sudoku Rival de luyen tren cau do Kho va Chuyen gia.

Luyen tap tao su hoan hao

Thu cach nay: giai cau do kho ma khong doan. Khi bi ket, tim mau X-Wing tung so mot cach he thong. Neu khong thay, thu Swordfish roi XY-Wing. Tren Sudoku Rival, thanh thao ky thuat nang cao la dieu tach biet nguoi giai gioi va nguoi giai xuat sac.