- Code: Select all
xx7/6xx/8xx
2xx/x1x/63x
6xx/x4x/2x5
-----------------
x2x/9xx/16x
x1x/3xx/x2x
x86/xxx/xxx
-----------------
x42/59x/786
87x/2xx/95x
569/x78/3x2
Thanks
xx7/6xx/8xx
2xx/x1x/63x
6xx/x4x/2x5
-----------------
x2x/9xx/16x
x1x/3xx/x2x
x86/xxx/xxx
-----------------
x42/59x/786
87x/2xx/95x
569/x78/3x2
+-------+-------+-------+
| * . 7 | 6 . . | 8 . * |
| 2 . . | . 1 . | 6 3 . |
| 6 . * | . 4 . | 2 . 5 |
+-------+-------+-------+
| . 2 . | 9 . . | 1 6 . |
| . 1 . | 3 . . | . 2 . |
| . 8 6 | . . . | . . . |
+-------+-------+-------+
| * 4 2 | 5 9 . | 7 8 6 |
| 8 7 * | 2 . . | 9 5 * |
| 5 6 9 | . 7 8 | 3 . 2 |
+-------+-------+-------+
JasonLion wrote:Without pencil marks I can't tell exactly how far you have gotten. From the puzzle as presented, you will need several locked candidates, a few naked pairs, and a sashimi X-wing, also called a skyscraper, to reduce it to singles.
eleven wrote:
- Code: Select all
+-------+-------+-------+
| * . 7 | 6 . . | 8 . * |
| 2 . . | . 1 . | 6 3 . |
| 6 . * | . 4 . | 2 . 5 |
+-------+-------+-------+
| . 2 . | 9 . . | 1 6 . |
| . 1 . | 3 . . | . 2 . |
| . 8 6 | . . . | . . . |
+-------+-------+-------+
| * 4 2 | 5 9 . | 7 8 6 |
| 8 7 * | 2 . . | 9 5 * |
| 5 6 9 | . 7 8 | 3 . 2 |
+-------+-------+-------+
Look at the 1 in columns 1, 3 and 9. You only have 2 possibilities each (cells marked *).
They are forming 2 skyscrapers in colums 19 (2 * being in row 1, one of r7c1 and r9c8 must be 1) and 39 (row 8, one of r3c3 or r1c9 must be 1), both solve the puzzle.
See here for skyscrapers.
Maria wrote:Can someone tell me what next step is, the technique to be used, and explanation
JasonLion wrote:Without pencil marks I can't tell exactly how far you have gotten.
eleven wrote:Look at the 1 in columns 1, 3 and 9. You only have 2 possibilities each (cells marked *).
They are forming 2 skyscrapers in colums 19 (2 * being in row 1, one of r7c1 and r9c8 must be 1) and 39 (row 8, one of r3c3 or r1c9 must be 1), both solve the puzzle.
ronk wrote:Maria wrote:Can someone tell me what next step is, the technique to be used, and explanationJasonLion wrote:Without pencil marks I can't tell exactly how far you have gotten.
Maria, are you even using pencilmarks? If not, it would be helpful to say so at the outset, otherwise most people will assume you are.eleven wrote:Look at the 1 in columns 1, 3 and 9. You only have 2 possibilities each (cells marked *).
They are forming 2 skyscrapers in colums 19 (2 * being in row 1, one of r7c1 and r9c8 must be 1) and 39 (row 8, one of r3c3 or r1c9 must be 1), both solve the puzzle.
eleven, very nice pencilmark-less solution.
Maria wrote:eleven wrote:
- Code: Select all
+-------+-------+-------+
| * . 7 | 6 . . | 8 . * |
| 2 . . | . 1 . | 6 3 . |
| 6 . * | . 4 . | 2 . 5 |
+-------+-------+-------+
| . 2 . | 9 . . | 1 6 . |
| . 1 . | 3 . . | . 2 . |
| . 8 6 | . . . | . . . |
+-------+-------+-------+
| * 4 2 | 5 9 . | 7 8 6 |
| 8 7 * | 2 . . | 9 5 * |
| 5 6 9 | . 7 8 | 3 . 2 |
+-------+-------+-------+
Look at the 1 in columns 1, 3 and 9. You only have 2 possibilities each (cells marked *).
They are forming 2 skyscrapers in colums 19 (2 * being in row 1, one of r7c1 and r9c8 must be 1) and 39 (row 8, one of r3c3 or r1c9 must be 1), both solve the puzzle.
See here for skyscrapers.
following yr advice and the link...... with patience I may succeeed - keep you posted - thanks for yr kind help