堡垒Fortress

标准数独基础上，涂色格内的数字大于相邻的白色格内的数字。

Classic rules applied, numbers in colored cells should be larger than the white cells adjacent to it.

◆涂色格 Colored cells

① 涂色格可能是1，当且仅当它周围没有相邻白格。

The colored cell may be 1 ,only if there are no white cells adjacent to it, vice versa.

② M种不同的涂色格相邻于白格A，则A≤N-M。

If there are M kinds of different colored cell adjacent to white cell A, A≤N-M. 

◆白格White cells

如果M种不同的白格相邻于涂色格A，则A≥N-M。

If there are M kinds of different white cell adjacent to colored cell A, A≥N-M. 

练习 Practice A

① 解答问号格 Find out the ？cells.

答案 Answer A

① C2=3; F3=1.

练习 Practice B

① 观察例题1 Observe the example-1.

(a) 六宫哪些格子可能是1？Which cells may 1 be in Box 6?

(b) 如果B9=8，五宫哪些格子可能是9？If B9=8, which cells may 9 be in Box 5?

(c) 五宫里2和3能否在同一行或列？Can 2 and 3 in Box 5, be in same Row or Column?

② 观察例题2 Observe the example-2.

(a) 哪些格子不能是1？Which cell cannot be 1?

(b) 你有更多推论吗？Do you have more inference?

答案 Answer B

① (a) D7 or F7 (b) D6、E6 and F6 (c) No, for no numbers smaller than 3.

② (a) 灰色部分不是1 The grey cells;

(b)A1, A9, I1, I9 里最多只有一个1 A1, A9, I1, I9 cannot own more than one 1.