I'm relatively new to the sudoku/killer sudoku world. I downloaded the top 2 apps for each respective category and started playing. I got the the highest difficulty on the killer sudoku and i havent completed even one yet. Now i'm stuck on a new puzzle. Am i missing something obvious? Please assist
To get you started: 23 in row 6 = 689, 16 in col 1 = 79 -> r6c1=7,r7c1=9 boxes 4,5 have 87 without r6c2 -> r6c2=3 r6c78=4,1 rows 56 have 82 without r5c5 -> r5c5=8,r1c4=8,r1c5=2 box 4 has 36 without r5c3 -> r5c3=9