Pick a 3×3 region to fill, one by one, instead of attempting the whole 9×9 grid at once.Regardless of the medium, these solving techniques should work on every classic grid you play: You might love going old school with pen and paper, but s udoku is now popularly played online, with auto-checker tools helping build confidence. If you’d like a deep dive into all the possibilities, this Glossary of Sudoku is a good starting point. Each grid shares one 3×3 region with another grid.Ĭompetitive events, such as the Indian qualifiers for the World Sudoku Championships, have an interesting mix of variants that a solver must crack as fast as possible. Samurai Sudoku: Five 9×9 classic grids that overlap at their corners. The grid’s diagonals may form a hidden word. Wordoku: Classic sudoku but with alphabets in place of numbers. These regions resemble four windows in a frame, hence the name: Example of a windoku puzzle with shaded interior regions. The digits 1–9 must appear in the shaded regions only once. Windoku or Hyper Sudoku: Classic grid with 3×3 regions, but with four additional shaded 3×3 regions in the middle. Trending | After 11 years of trying, Mumbaikar wins India’s first silver at World Puzzle Championship
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