Variations on Junior Sudoku Logic Puzzles (Vol 1) Step-by-Step Instructions for Puzzle 928   (29/36) Diff: 11/221.1AA3.3474 The numbers in the puzzle below refer to the step number at which the value of the location can be deduced. Locations without step numbers contain the initial values found in corresponding puzzle in your edition of the book.

Rows are numbered top to bottom, columns from left to right, and rectangles from left to right and then top to bottom. Coordinates are (col, row). Precise details on numbering within each group are specified in the on-line instructions for 'Sudoku-6up-UR-D' puzzles.

Step 1. There are 2 independent moves.

• The only spot left for 4 in the 2nd 2x3 rectangle is at (4, 2).
• The only spot left for 3 in the 5th 2x3 rectangle is at (3, 4).

Step 2. There are 2 independent moves.

• The only spot left for 5 in the 2nd 2x3 rectangle is at (3, 2).
• The only spot left for 2 in the 5th 2x3 rectangle is at (3, 5).

Step 3. There is 1 independent move.

• The only spot left for 1 in the 2nd 2x3 rectangle is at (3, 1).

Step 4. There is 1 independent move.

• The only spot left for 6 in the 2nd 2x3 rectangle is at (3, 3).

Step 5. There is 1 independent move.

• 4 must be placed at (1, 1) because it is the only value left that is not already in the 1st row, the 1st column, the 1st 2x3 rectangle or the diagonal elements.

Step 6. There is 1 independent move.

• 1 must be placed at (5, 5) because it is the only value left that is not already in the 5th row, the 5th column, the 6th 2x3 rectangle or the diagonal elements.

Step 7. There are 3 independent moves.

• The only spot left for 1 in the 3rd 2x3 rectangle is at (6, 2).
• The only spot left for 1 in the 5th 2x3 rectangle is at (4, 6).
• The only spot left for 1 in the upper right corners of each rectangle is at (2, 4).

Step 8. There are 3 independent moves.

• The only spot left for 4 in the 4th 2x3 rectangle is at (2, 5).
• The only spot left for 6 in the 5th 2x3 rectangle is at (4, 5).
• The only spot left for 4 in the upper right corners of each rectangle is at (6, 4).

Step 9. There are 4 independent moves.

• The only spot left for 5 in the 5th row is at (6, 5).
• The only spot left for 6 in the 6th column is at (6, 1).
• The only spot left for 4 in the 3rd 2x3 rectangle is at (5, 3).
• The only spot left for 5 in the upper right corners of each rectangle is at (4, 4).

Step 10. There are 7 independent moves.

• The only spot left for 2 in the 3rd row is at (6, 3).
• The only spot left for 6 in the 2nd column is at (2, 6).
• The only spot left for 3 in the 6th column is at (6, 6).
• The only spot left for 6 in the 1st 2x3 rectangle is at (1, 2).
• The only spot left for 3 in the 3rd 2x3 rectangle is at (5, 2).
• The only spot left for 5 in the 4th 2x3 rectangle is at (1, 6).
• The only spot left for 3 in the upper right corners of each rectangle is at (2, 1).

Step 11. There are 4 independent moves.

• The only spot left for 2 in the 6th row is at (5, 6).
• The only spot left for 2 in the 4th 2x3 rectangle is at (1, 4).
• The only spot left for 6 in the 6th 2x3 rectangle is at (5, 4).
• The only spot left for 2 in the diagonal elements is at (2, 2).