Category Archives: Nakamoto

Wrapping Up Nakamoto Extreme With 183

Posted on April 28, 2020 by Sudent

This post completes the review of the Nakamoto Extreme collection. The review table follows the finish of Nakex 183. A Sudokuwiki assisted solution of Nakex 183 continues with the second APE triggered by the first’s removal of 8r2c9. In this one, … Continue reading →

Posted in Extreme Solving, Nakamoto, Puzzle Reviews | Tagged ALS APE, ALS bv boomerang, ANL boxline, coloring bridge, coloring shortcut ANL, grouped ANL, J.B.Nakamoto Extreme, review table, XY-wing | Leave a comment

Nakex 183 Hides the Keys

Posted on April 21, 2020 by Sudent

The last review puzzle, Nakamoto Extreme 183, follows the collection’s pattern of hiding easier removals behind methods that are very difficult to spot. An effective defense is to maintain bv maps, X-panels, and coloring clusters carefully as more advanced results … Continue reading →

Posted in Extreme Solving, Nakamoto, Puzzle Reviews | Tagged ALS APE, confirming ANL by bv boomer, grouped X ANL, hidden UR 1, J.B.Nakamoto Extreme, Sudoku BARN, WXYZ-wing | Leave a comment

An Orphan Takes Down Nakamoto Extreme 163

Posted on April 14, 2020 by Sudent

In this post, AIC building is replaced by BARN’s, conventional chains, coloring, and a noteworthy pattern analysis result. Nakex 163 basic starts with a 3-fill. The bypass contains six more. Two resolve into clue and naked pair, and one, into … Continue reading →

Posted in Advanced Solving, Nakamoto, Puzzle Reviews | Tagged 4 or 3-BARN, BARN parade, freeform cluster expansion, J.B.Nakamoto Extreme, orphan cluster expansion, Type 2 UR | Leave a comment

Nakamoto 143 Avoids Extremes

Posted on April 7, 2020 by Sudent

Nakex 143, the eighth puzzle in the review, avoids AIC building with an outstanding exhibition of advanced techniques, and three subsets in basic line marking, including this naked triple. Two more show up in LM closing, the stage that examines … Continue reading →

Posted in Advanced Solving, Nakamoto, Puzzle Reviews | Tagged coloring bridge, J.B.Nakamoto Extreme, LM hidden pair, LM naked triple, multiple ANL, swordfish, WXYZ-wing | Leave a comment

Nakamoto Extreme 123 Is, Briefly

Posted on March 31, 2020 by Sudent

Nakex 123 limps into AIC building briefly, then succumbs to Sudokuwiki XY chains, simple coloring traps, a coloring bridge and an outstanding BARN. Here is the grid at the end of a bypass exceptional among Nakamoto Extreme puzzles. The slink … Continue reading →

Posted in Advanced Solving, Extreme Solving, Nakamoto | Tagged ALS bv boomerang, bypass, coloring traps, J.B.Nakamoto Extreme, Sudoku BARN, XY wraps, XY-chains, XYZ-wing | Leave a comment

A Pattern Analysis Attack on Nakex 103

Posted on March 24, 2020 by Sudent

This post reports an alternative Sysudoku solution to Nakamoto Extreme 103, starting with a pattern analysis signaled on an X-panel. The analysis develops and exploits a coloring cluster to accelerate the solution. The starting cluster is … Continue reading →

Posted in Advanced Solving, Nakamoto, Puzzle Reviews | Tagged freeform pattern analysis, pattern wrap, shortcut confirming ANL, XY chain ANL | Leave a comment

Sudokuwiki’s Nakamoto Extreme 103

Posted on March 17, 2020 by Sudent

After Sysudoku Basic, this post describes the Sudokuwiki advanced and AIC solution path on Nakex 103. The next post reports an alternative path shortened significantly by a freeform pattern analysis. Nakex 103 starts a little differently, with some bypass success: … Continue reading →

Posted in Extreme Solving, Nakamoto, Puzzle Reviews | Tagged AIC boomerangs, AIC confirming ANL, AIC nice loop, APE, boomer wrap, digit forcing chain, hidden UR type 2b, J.B.Nakamoto Extreme, LM X-wing, Sudoku BARN, XYZ-wing | Leave a comment

A Nakex 83 BARN Storming Finish

Posted on March 10, 2020 by Sudent

This post details the unusual finish of Nakamoto Extreme 83, with three more interdependent BARN’s, well assisted by Medusa coloring. From the first cluster trap and BARN, further expansion and the aligned triple continue to move Nakamoto Extreme 83 towards … Continue reading →

Posted in Advanced Solving, Nakamoto, Puzzle Reviews | Tagged J.B.Nakamoto Extreme, Shortcut ANL, Sudoku BARN | Leave a comment

A Nakex 83 BARN Challenge

Posted on March 3, 2020 by Sudent

Nakamoto 83 earns its Extreme badge by an extremely tough Basic, and resistance to anything short of AIC building. It ends with an expanding cluster, accelerated by a series of BARNs. This post brings you to the first one, and … Continue reading →

Posted in Extreme Solving, Nakamoto, Puzzle Reviews | Tagged AIC ALS nice loop, boomer confirming ANL, J.B.Nakamoto Extreme, Sudoku BARN, XY ANL | 8 Comments

Sudokuwiki Ends Nakex 63 On Its Own

Posted on February 25, 2020 by Sudent

This post picks up on the Sudokuwiki/Sysudoku resolution of Nakamoto Extreme 63 where it was overtaken by pattern analysis and coloring, and finishes it in two ways, one humanly practical and one not. Sudokuwiki doesn’t maintain coloring clusters between moves, … Continue reading →

Posted in Extreme Solving, Nakamoto, Puzzle Reviews | Tagged AIC ANL, AIC nice loop, ALS toxic pair, APE, cell forcing chains, hidden UR type 2, J.B.Nakamoto Extreme, Sudoku BARN, UR strong link | Leave a comment

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