The Cusp of Helix

Puzzle Introduction

SDK Lattice

6.3...87.89.5..4.2..6.9...757...8.6..4.9.2.5..2.3...989...2.1..7.9..5.84.57...3.9 11.222.3311.222.33.........44.555.6644.555.6644.555.66.........77.888.9977.888.99 ..........111.222..111.222..111.222...........333.444..333.444..333.444..........

"SDK Lattice" is new variant of "Sudoku(= Number Place) *1". The shape of blocks of "SDK Lattice" is different from standard Sudoku.


Blocks of "SDK Lattice" consists of two layers. Please see puzzle board.

  1. First layer has four 3x3-blocks. These blocks were bounded by red border in the puzzle board.
  2. Second layer has four 2x2-blocks, four 3x2-blocks, and one 3x3-block.

"SDK Lattice" has 13 blocks in first and second layer. Digits cannot repeat on each row, column and block.

Android app on Google PlaySDK Lattice