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Some Gruntzerz may not do Sudoku puzzlez, so do not know how to begin.

Sudoku (in its standard form) consistz of 9 blockz wide by 9 blockz high, with 9 groupz of 3 blocks wide by 3 blockz high.
The numberz 1 through 9 (or 9 different Gruntz. ) will fit into the arrangement so that no number (or Grunt) appearz in the same row (across), column (down) or box of 3X3 more than once.
I have never seen a puzzle with 1 through 9 in sequence across or down. I also have never seen 1 through 9 in sequence in a spiral in a box.
(It is impossible to avoid duplicationz on the diagonalz. )
Frequently, the entry Tile will also be the CheckPoint Switch for the last Grunt to arrive.
So if a 3X3 box does not have an entry marked, the last Grunt's Tile is also the entry point.
The Gruntz marked 'first' and 'last' are the Designer's suggestionz.