Many thanks for this brilliant sudoku freeware.
Just one question, I don't understand what "possibles locked in a row" means.
 I tried studying the yellow coloured cells but can't really decipher the meaning of this remark.
 I tried studying the yellow coloured cells but can't really decipher the meaning of this remark.Kindly elaborate, thanks.
 I tried studying the yellow coloured cells but can't really decipher the meaning of this remark.
 I tried studying the yellow coloured cells but can't really decipher the meaning of this remark.