"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.
- First layer has four 3x3-blocks. These blocks were bounded by red border in the puzzle board.
- 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.