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Bud
Joined: 06 May 2010
Posts: 47
Location: Tampa, Florida
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 Posted: Thu Jul 01, 2010 2:01 pm Post subject: A Bivalue ER+1 Example |
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I think this is new but I have often been wrong before. The ER+1 box in this example is B6, Note that r6c9 is the +1 cell in this box since it and the ER are both devoid of the digits 3 and 6. The logic is simple. Either cell A is 3 or cell B is 6 and therefore cell C must be either 3 or 6. Since there are no other possibilities, all other digits can be eliminated from cell C. In this case 2 is the only digit that can be eliminated.
Bivalue ER+1 Example | Code: |
|-----------------+-----------------+-----------------|
| 9 25 6 | 1 3 4 | 8 7 25 |
| 134 345 145 | 7 26 8 | 26 9 45 |
| 8 24 7 | 5 269 69 | 3 1 246 |
|-----------------+-----------------+-----------------|
| 2347 3457 245 | 8 469 69 | 1 25 -236C |
| 34A 3458 9 | 46B 1 2 | 7 568 368 |
| 6 1 28 | 3 7 5 | 9 4 28 |
|-----------------+-----------------+-----------------|
| 247 4678 248 | 246 468 1 | 5 3 9 |
| 5 9 3 | 246 468 7 | 26 268 1 |
| 12 68 128 | 9 5 3 | 4 268 7 |
|-----------------+-----------------+-----------------| |
The original puzzle is Sudoku 9981 Extreme Book 48 #7. The only advanced move that I used to reach this point in the puzzle is a finned X-Wing in c69. |
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