Tag Archives: Sysudoku box marking

KDST 575 Highlights Box Marking


Box marking gets to shine in the redo of Super-Tough, volume 5, book 7, #5. Here is the grid after the relatively modest bypass. The fill strings show where 4-fills were examined, but only one was found. In this snapshot, … Continue reading

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Lucky Panda 480 Ends the Review


The last review Sudoku of the Lucky Panda Books 500 Sudoku Puzzles, 480, finishes on message with Sysudoku’s choices of bv mining tools, the XY railway and coloring. If you have time for nothing else, you might try your hand … Continue reading

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Sysdudoku Box Marking


This post describes in detail the procedure of box marking, the first of two basic solving stages of Systematic Sudoku.  Box marking identifies and marks slinks and naked subsets within boxes, as well as new clues.  A walkthrough illustrates  the … Continue reading

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