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Perplexing Sudoku-by5 Group Puzzle

The grouppuzzles.com Perplexing Sudoku-by5 puzzle for  with all 52 steps marked

The small superscript in each undetermined location is the step number at which the location must be fill before all of the locations with subsequent step numbers can be determined. A detailed description of the moves in each step is given below.

Display the puzzle with superscripts showing just the step number for the first few steps in their empty grid locations.

See the puzzle answer grid.

Deductive steps to solve the puzzle

The moves within each step may be done in any order.

All of the moves within a particular step must be done before all of the moves in the subsequent step can be guaranteed to be completed.

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 .

Step 1. There are 20 independent moves.

Step 2. There are 11 independent moves.

Step 3. There are 8 independent moves.

Step 4. There are 7 independent moves.

Step 5. There are 9 independent moves.

Step 6. There are 5 independent moves.

Step 7. There are 3 independent moves.

Step 8. There are 4 independent moves.

Step 9. There are 5 independent moves.

Step 10. There are 6 independent moves.

Step 11. There are 8 independent moves.

Step 12. There are 9 independent moves.

Step 13. There are 7 independent moves.

Step 14. There are 5 independent moves.

Step 15. There are 7 independent moves.

Step 16. There are 4 independent moves.

Step 17. There are 3 independent moves.

Step 18. There are 4 independent moves.

Step 19. There are 3 independent moves.

Step 20. There are 5 independent moves.

Step 21. There are 8 independent moves.

Step 22. There are 8 independent moves.

Step 23. There are 9 independent moves.

Step 24. There are 4 independent moves.

Step 25. There are 4 independent moves.

Step 26. There are 6 independent moves.

Step 27. There are 7 independent moves.

Step 28. There are 3 independent moves.

Step 29. There is 1 independent move.

Step 30. There is 1 independent move.

Step 31. There is 1 independent move.

Step 32. There is 1 independent move.

Step 33. There are 2 independent moves.

Step 34. There are 3 independent moves.

Step 35. There are 4 independent moves.

Step 36. There are 3 independent moves.

Step 37. There are 2 independent moves.

Step 38. There are 5 independent moves.

Step 39. There are 3 independent moves.

Step 40. There are 3 independent moves.

Step 41. There are 7 independent moves.

Step 42. There are 7 independent moves.

Step 43. There are 6 independent moves.

Step 44. There are 2 independent moves.

Step 45. There are 2 independent moves.

Step 46. There are 5 independent moves.

Step 47. There are 5 independent moves.

Step 48. There are 3 independent moves.

Step 49. There are 4 independent moves.

Step 50. There are 10 independent moves.

Step 51. There are 9 independent moves.

Step 52. There is 1 independent move.

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