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PGExplainer

PGExplainer is a Minimal SudokuExplainer, to rate (ER/EP/ED) sudoku puzzles.

It is Nicolas Juillerat's SudokuExplainer 1.2.1, with Glenn Fowler's serate code (SE 1.2.1.3), with the multi-threaded chaining code from SukakuExplainer, and with a number of additional code changes by me.

All code not needed in the serate process have also been removed.

Usage - serate

java.exe -Xrs -Xmx500m -cp PGExplainer.jar sudoku.serate --input=puzzles.txt --output=output.txt

Options

Only these options are supported:

-f, --format=FORMAT
-i, --input=FILE
-o, --output=FILE

The default FORMAT is "%g ED=%r/%p/%d", so this does not have to be specified.

Options - for sudokus with multiple solutions

Only these options are supported:

-M  for sudokus with multiple solutions

-N  use with -M, disable Nested Forcing Chains checks
-D  use with -M, disable Dynamic Forcing Chains checks (implies -N)

Comparison

Comparison of time taken to rate all sudokus posted in Patterns Game 415 (87 sudokus, including more's):

                        Version     Size            Rating Time

SudokuExplainer.jar   - 1.2.1.3   - 304,777 bytes - 10 m 34 s

PGExplainer.jar       - 2021.3.30 - 56,712 bytes  -  2 m 45 s