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Tag Archives: X-panel
Hodoku Grouped AIC I
This post uses two grouped AIC ANL from Hodoku to illustrate how such chains are inspired and constructed. After the first, readers are challenged to try this approach on the following examples, with checkpoint to follow. I was prepared to … Continue reading
Posted in Advanced Solving, Expert Reviews, Hobiger
Tagged AIC almost nice loops, Bernhard Hobiger, coloring trap, Grouped AIC ANL, Hodoku, X-panel
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A Little More Extreme
Here is a follow up on the advanced level More Extreme 4, with background looks at the bv map, XYZ map, and X-panel . There is a challenge to find a forcing chain XYZ alongside a regular one. Entering the … Continue reading
Stephens in the Library with a Laptop
This post continues with differences between sysudoku advanced solving and the Paul Stephens “extreme” order of battle. In particular, the power of full Medusa coloring compared to Stephens’ limited multi-colouring. Let’s begin with a checkpoint for solve-along sysudokie readers. In … Continue reading
What Regular Fish to Fish For
Come let us reason together about regular fishing, i.e. finding X-wings, swordfish, or jellyfish on an X-panel . We look at sets of lines in one direction, then the other. Rows and columns. We seek a set of n lines … Continue reading
Posted in Advanced Solving, Sudoku Toolware
Tagged regular fish, squirmbag, swordfish, X-panel
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Slink Loops
A “slinks only” X-loop of an even number of slinks consists of alternating true and false candidates. That we know by the logic of slinks. We just don’t know if it’s the arbitrary one we pick, or the next one, … Continue reading
The X-Panel and X-Chains
We will now be leaving methods relying on the bv map as the primary visual aid. With puzzles that survive these methods, we need to remember that the bv map file remains an important resource. With every clue or candidate … Continue reading
Posted in Advanced Solving, Sudoku Toolware
Tagged single chains, X-chains, X-cycles, X-panel, XY-wing, Y-wing
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