Hi eddydo and welcome to the Forum.

You say you are new to Sudoku. The possible numbers for unsolved cells are known as "candidates" or "pencilmarks" and your "Pencilmark" grid would look like this:

- Code: Select all
` *-----------------------------------------------------------------------------*`

| 28 6 7 | 289 3 2489 | 1 5 24 |

| 3 19 129 | 7 1469 5 | 2469 2469 8 |

| 4 159 12589 | 12689 1689 12689 | 2679 2679 3 |

|-------------------------+-------------------------+-------------------------|

| 16 7 1356 | 123569 14569 12469 | 23469 8 245 |

| 9 1345 13568 | 123568 14568 12468 | 2346 246 7 |

| 68 2 3568 | 35689 456789 46789 | 3469 1 45 |

|-------------------------+-------------------------+-------------------------|

| 7 139 1239 | 1589 1589 189 | 248 24 6 |

| 5 1 126 | 4 1678 3 | 278 27 9 |

| 16 8 4 | 169 2 1679 | 5 3 1 |

*-----------------------------------------------------------------------------*

Each row, column and "Box" (these are the nine 3X3 boxes within the puzzle grid) must contain each of the digits 1 to 9. As you already have digits 3,4,5 and 9 placed in row8 (r8) and digits 2,6,7 and 8 placed in column2 (c2) then this leaves only one possible number (known as a "naked single") to fill cell r8c2 - it can only be digit 1. By excluding the other candidate 1's in c2 this leaves digit 9 as the only number to fill cell r2c2. In row9 candidate 1 is the only number that can fill cell r9c9 - this then enables all other candidate1's being excluded from row9 leaving digit 6 to fill cell r9c1.

Continuing with this procedure can lead to solving this puzzle. If you need more help then just ask - there is usually someone available to help you

You can read up on the procedure for posting puzzles and terminology by clicking on

HERE. The following links are also popular for learning the "basic" solving techniques:

http://www.angusj.com/sudoku/hints.phphttp://www.simes.clara.co.uk/programs/sudokutechniques.htmGood luck with your sudoku.

PS.

Hud is correct that this puzzle is pretty straight forward without the need for pencilmarks but I decided to retain my above comments as additional help.

Cec