# sudoku

step 1 2 3 4 5 6 7 8 9 10
<home

A very easy puzzle to get the idea of how sudoku is solved
explanations:-
this is step 9

c3 has a 2 in its last cell in box 7 which makes a 7 in the last cell of box 7.

Now c1 has only one cell left for a 2 in c1r1, and a 7 completes Box 1 and c2.

c4 also has only one cell free at c4r2 for the missing 2.

Box 8 is short of a 3 and a 7 but the existing 7 in c5 decides the placing. Just a 1 to finish off c5 at c5r3.

The last two numbers in Box 2 are 3 and 8 and are the opposite of 3 and 8 in Box 1.

r2 is short of a 1 and r3 needs a 2 to finish.

r1 needs 7 and 8 but the 7 in c9r4 decides the position.

 c1 c2 c3 c4 c5 c6 c7 c8 c9 2 4 1 5 9 6 7 3 8 r1 box 1 2 & 3 3 -box 1- 7 6 2 -box 2- 4 8 9 - box 3  1 5 r2 8 5 9 7 1 3 2 4 6 r3 9 8 3 4 2 1 6 5 7 r4 box 4 5 & 6 6 - box 4  1 4 8 - box 5 - 7 5 - box 6  9 r5 5 2 7 3 6 9 1 8 4 r6 7 3 8 1 5 2 4 6 9 r7 box 7 8 & 9 4 - box 7  9 5 6 - box 8 3 7 box 9 r8 1 6 2 9 8 4 5 r9
 [ contact me, Roger Walker ] 15th january 2010 © 2014