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BUG+2

 
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Sat Oct 20, 2007 9:08 pm    Post subject: BUG+2 Reply with quote
Here is a good example:

Code:
Puzzle: BB102007vh
+-------+-------+-------+
| . 2 . | 5 3 7 | . 4 . |
| 5 . 3 | . . . | 2 . 1 |
| . 7 . | . . . | . 5 . |
+-------+-------+-------+
| 9 . . | 3 . 5 | . . 2 |
| 3 . . | . . . | . . 7 |
| 7 . . | 8 . 4 | . . 5 |
+-------+-------+-------+
| . 9 . | . . . | . 6 . |
| 4 . 6 | . . . | 7 . 9 |
| . 3 . | 6 1 9 | . 2 . |
+-------+-------+-------+

There is a UR that should be ignored.

Keith
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Johan



Joined: 25 Jun 2007
Posts: 206
Location: Bornem Belgium
PostPosted: Sat Oct 20, 2007 10:40 pm    Post subject: Reply with quote
Ignoring the type 1 UR, i used a 7-cell XY-chain.

Starting with <4> in R2C2, chain ends with <8> in R4C8, eliminating <8> in R4C2

Code:

+----------+----------+---------+
| 1 2  89  | 5  3  7  | 89 4  6 |
| 5 A48 3  |B49 89 6  | 2  7  1 |
| 6 7  489 | 14 28 12 | 89 5  3 |
+----------+----------+---------+
| 9 4-8 148| 3  7  5  | 6  G18 2|
| 3 5  28  |C19 6  D12| 4  89 7 |
| 7 6  12  | 8  E29 4 | 3  F19 5|
+----------+----------+---------+
| 2 9  5   | 7  4  3  | 1  6  8 |
| 4 1  6   | 2  5  8  | 7  3  9 |
| 8 3  7   | 6  1  9  | 5  2  4 |
+----------+----------+---------+
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