Solution

Sudoku Solution

Killer Sudoku 300521

a3=8

i7=8

Killer Sudoku 300514

Killer Sudoku 300507

Killer Sudoku 300430

Killer Sudoku 300423

Killer Sudoku 300416

Killer Sudoku 300409

Killer Sudoku 300402

Killer Sudoku 300326

AC:

g6 = 45 + 45 - 11 - 15 - 9 - 13 - 14 - 12 - 8 = 8

g7 = 11-8 = 3

c4 = 45 + 45 - 15 - 19 - 11 - 8 - 5 - 7 - 16 = 9

c3 = 11 - 9 = 2

d3 = 45 - 13 - 25 - 6 (NDC d1,d2) = 1

d4 = 5

f7 = 45 - 26 - 7 - 10 (NDC f8,f9) = 2

f6 = 3

DC:

f8,g8 = 3 = 1,2

NDC:

d1,d2 = 18 + 22 + 9 + 2 - 45 = 6

f8,f9 = 21 + 3 + 28 + 3 - 45 = 10

d4, f6 = 45 - 37 = 8

Killer Sudoku 300319

3 AC available at e5, h3 and h7.

AC at e5 = 45 + 45 - 9 - 24 - 13 - 26 - 12 = 6

AC at h3 = 45 - 20 - 11 - 10 = 4

providing NDC for sum of 9 - 4 = 5 at h4, i4

AC at h7 = 45 - 10 - 17 - 15 = 3

providing NDC for sum of 18 - 3 =15 at h6, i6

2 DC available at c3,d2,d3 and h8,h9

DC at cage c3,d2,d3 = 7,8,9 with sum of 3-cell cage being 24

DC at cage h8,h9 = 8,9 with sum of 2-cell cage being 17

Killer Sudoku 300312

There are 2 AC at A3 and i 7.

Use the Golden Rule. It is obvious that A3 = 45 - 10 - 19 - 14 = 3

If follows A4 = 3 - 2 = 1

Another AC is i 7 = 45 - 21 - 7 - 9 = 8

If follows that i 6 = 11 - 8 = 3

Use the x method to eliminate all impossible numbers in all squares with clues.

Having these 4 numbers put in the Killer Sudoku, what would be your next step ?

殺手數獨300312
在A3和i 7處有2個絕對線索。

使用黃金法則，很明顯，A3 = 45-10-19-14 = 3
因此，A4 = 2-3 = 1

另一個絕對線索是 i 7 = 45-21-7-9 = 8
因此，i 6 = 11-8 = 3

使用“消除”方法。輸入“ x”以在空白方塊中顯示所有不可能的數字。

將這四個數字放入殺手數獨中後，下一步是什麼？

Killer Sudoku 300312 (cont'd)

After screening of the whole board with all AC, DC, NDC, there is still no explicit solution to the next step.

The tactics will be to look for some cages with 3 squares containing possible clue. Due to the numerous possibilites, it is difficult when working on 3-square cages. The advantageous approach will look first those with more x input. Obviously the DC will produce more x than NDC.

在用所有AC，DC，NDC篩選整個遊戲板之後，下一步仍然沒有明確的解決方案。策略是尋找一些可能帶有線索的3個正方形的籠子。由於存在多種可能性，因此在考慮包含3個正方形的籠子時很難做到。有利的方法是首先查看那些具有更多x輸入的籠子。顯然，DC將比NDC產生更多的x。

Killer Sudoku 300312 (cont'd)

The cage a6, a7, b7 contains an DC. This would be a good clue to follow.

The DC provides possibilities of either 8 or 9 at a6. Taking note of the AC at i7, DC at c7 and d7, the working of the cage will be:

Cage sum

DC at a6

consequential sum of a7 b7

consequential possible DC of a7 b7

Consideration

Cage of 3 Squares

8,1

No - AC at i7, DC at c7 and d7

7,2

No - DC at c7 and d7

6,3

5,4

No - DC at c7 and d7

Killer Sudoku 300305

AC1:

a3=45-14-30=1

NDC:

a4,b4=12-1=11

a7,c7=14+30+12+14+3+17+13-90=13

AC2:

c8=45-13-19-9=4

d8=12-4=8

NDC2:

d7,f7=45-8-12-19=6

d6,f6 =5+6-6=5

DC2:

d4,f4 =45-5-23=17

NDC2:

d3,f3 =17+15-17=15

AC3:

f2 =45-15-20-5=5

g2 =12-5=7

NDC:

g3,i3 =45-14-15-7=9

AC:

i7 =45-11-31=3

NDC:

h6,i6 =19-3=16

Killer Sudoku 300227

AC:

c7 : 45-16-7-7-7=8

d7 : 15-8=7

g7 : 45-13-10-8-13=1

f7: 5-1=4

e7 : 45-32-7-7=2

NDC:

c3,d6 : 13+11-(45-23-14)=16

f6,g3 : 19+15-(45-17-7)=13

Sudoku 數獨

Killer Sudoku 殺手數獨

Sudoku Solution