The New Sudoku Players' Forum

[Cec]

Got as far as this on a Simple Suduko hard puzzle:

[36][236][246] [7] [345689][35689] [1][23489][2468]
[7][8][1] [349][3469][2] [369]349][5]
[9][5][246] [34][3468][1] [236][2348][7]

[8] [1269][269] [1249][12469][69] [5][7][3]
[16][7][3] [12459][124569][569] [8][1249][1246]
[5][4][269] [1239][1236789[36789] [269][129][126]

[2][13][8] [6][137][37] [4][5][9]
[4][139][5] [8][1239][39] [7][6][12]
[136][1369][7] [12359][12359][4] [23][1238][128]

Pressing the' Hint' button tells me to "Exclude based on 'Locked candidates'(1)

Any help would be appreciated to explain what this means.

Regards Bonsai Cec

[angusj]

http://angusj.com/sudoku/hints.php#locked_candidates_1