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Author Message
Topic: 5/13/07 Nightmare
Novajlija

Replies: 12
Views: 10893

Forum: Daily Sudoku Nightmare & Archive   Posted: Mon Oct 13, 2008 8:11 pm   Subject: 5/13/07 Nightmare
Number 4 is LOCKED in R1C1 and R1C3. If there is naked pair 4-7 then we have R1C5=1, R3C4=7, R4C7=7 and R6C3=4. So we ken eliminate number 7 from R1C1 or R1C1=4.

There is few more this kind of el ...
Topic: Is this valid 2?
Novajlija

Replies: 5
Views: 4088

Forum: Solving Techniques & Tips   Posted: Thu Apr 24, 2008 8:17 am   Subject: Is this valid 2?
Hi Steve.

My point is: If r8c1 = 8 then r9c1=6 so r9c1 ≠ 5.

Generally:
There is two cells (in the box/ column/ row) with locked candidate A:
cell1 = ABCD
cell2 = ABCF ...
Topic: Is this valid 2?
Novajlija

Replies: 5
Views: 4088

Forum: Solving Techniques & Tips   Posted: Sat Apr 12, 2008 9:08 am   Subject: Is this valid 2?
Let's use this code from another topic.

Code:
.------------------.------------------.------------------.
| 7 6 1 | 8 3 2 | 4 9 5 |
| 4 9 8 | 1 6 ...
Topic: Is this valid?
Novajlija

Replies: 3
Views: 3207

Forum: Solving Techniques & Tips   Posted: Mon Nov 19, 2007 2:15 am   Subject: Is this valid?
Hi Ruud!

I'm sorry, it's just oversight, it is R9C7=5.

And about rule: for me is easier to consider 2 or 3 cells in line (in the same box), at the same time, and see what is result.

I need h ...
Topic: Is this valid?
Novajlija

Replies: 3
Views: 3207

Forum: Solving Techniques & Tips   Posted: Sun Nov 18, 2007 11:21 pm   Subject: Is this valid?
Let's use this code from another topic.

.-----------------------.-----------------------.-----------------------.
|7 6 1 |8 3 2 |4 9 5 |
|4 ...

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