There are 55 row-minlex grids, that contain the clue set.

There are five minlex band 1's where adding

2r4c1 and the band as clues, gives a puzzle with a unique solution.

For two of those, the solution itself, is a minlex grid.

Something else is missing.

coloin wrote:The two clues in box 8 and 6 are significant !

The two band 1's, are at (1-based) indicies 24 and 29.

Since the two clues in boxes 8 and 6 are 2 and 9 (respectively), and band 29 is famous as being the only band with

2-clue puzzles,

I'll guess that the solution is:

- Code: Select all
`+-------+-------+-------+`

| 1 2 3 | 4 5 6 | 7 8 9 |

| 4 5 6 | 7 8 9 | 2 3 1 |

| 7 8 9 | 2 3 1 | 5 6 4 |

+-------+-------+-------+

| 2 3 5 | 1 4 8 | 9 7 6 |

| 6 9 1 | 5 2 7 | 3 4 8 |

| 8 4 7 | 9 6 3 | 1 2 5 |

+-------+-------+-------+

| 3 6 2 | 8 9 5 | 4 1 7 |

| 5 7 8 | 3 1 4 | 6 9 2 |

| 9 1 4 | 6 7 2 | 8 5 3 |

+-------+-------+-------+

coloin wrote:Its two easy now !

The proposed solution grid, also has

two automorphisms !