Tag Archives: coloring bridge

Moito’s Road to Sudoku Mastery


My first Sysudoku review of 2018 is one of a host of new collection books with the same grid format, some with an unexplained rating system, some with listed authors A.D. Ardson and Rebecca Bean. Moito and Bean’s  Extremely Hard … Continue reading

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Berthier’s xyzt Chain


This post concludes my reading of Denis Berthier’s The Hidden Logic of Sudoku, with two example puzzles to illustrate his xyzt-chain. While it is good to be aware of Berthier’s “t” versions of classic XY chains, I don’t recommend a comprehensive … Continue reading

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Box Marking of Maestro 4


This is an extra post for any sysudokies working up Maestro 4 for color bridging. After 1: NWm=>Wm, Sm.  2: Cm. 3:NWm=>Wm, Sm.  4: NEm=>Em.  5: SW5=>Sm. 6: Nm=>Cm, SWm.   7:  Nc5np67.  8:  9: NE9=>(SEm, NE4=>(NW4m, NE5m=>E5m), NE2m), Cm. the grid … Continue reading

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