SudoCue Users

After several steps the grid looks like this: .------------------.------------------.------------------. | 8 46 369 | 7 2 13 | 5 1469 349 | | 7 1 23569| 359 359 4 | 2389 268 239 | | 345 245 2359 | 6 1359 8 | 239 1249 7 | :------------------+------------------+------------------: | 12...

Ruud, Ron, thanks guys. So if one finds such reflections chances are that there are some fishes close there. (By the way, coloring the beam in both directions, I mean starting from one end of the strong link and marking all true candidates, then starting from the other end and marking true candidate...

I found a different use of this technique. In the below example it works with more general reflections, not only with empty rectangles. (This arrangement is a random unfair sudoku, generated with SudoCue, after several steps) * * .|2 * 7|* * 3 * * .|* * .|6 2 . 2 3 .|6 * 8|4 * . -----+-----+----- 7 ...

In today's nightmare there are several possibilities of using chains of empty rectangles. For example after few steps there are two such chains: . . .|* * .|* . * . 3 1|7 * 5|9 8 * . 7 4|. . .|6 1 . -----+-----+----- * 8 .|1 . 3|5 2 * * * .|. 5 .|* . . . 5 .|9 . 4|. 7 . -----+-----+----- . 9 8|5 . ....