Solutions to hard and very hard Sudoku puzzle games are collected together in a comprehensive updated list. It includes level 4 and NY Times Sudoku puzzles.
The very hard expert Sudoku level 5 game 12 is solved step by step by advanced Sudoku techniques and the new technique of linked single digit lock analysis.
After initial hard to come by breakthroughs, the very hard Sudoku game 38 finally solved by repeated X wing reduction of possible digit.
Sudoku hard game 37 is solved by advanced Sudoku solution techniques of double digit scan, parallel scan, Cycles and naked cell by digit subset reduction.
Sudoku hard game 36 is solved by advanced Sudoku solution techniques of double digit scan, parallel scan, and naked cell by long digit subset reduction.
After initial hard to come by breakthroughs, the very hard Sudoku 35 finally solved by linked locked digit pair analysis and test of invalid choice.
Sudoku hard level 4 game 34 solved by Sudoku hard solution techniques. Persistent use of single digit lock and other patterns provided breakthroughs.
Sudoku hard level 4 game 33 solved by forming an X wing pattern of two pairs of digits sharing same two columns and rows for the critical breakthrough.
Very Hard Sudoku Level 4 Game 32 Solved by asymmetric X wing diagonal test. A pair of diagonally opposite locked digits are tested invalid for breakthrough.
Sudoku hard solution techniques are used with intensity and innovation to solve the Sudoku hard level 4 game 31 in easy steps.
