129 Better [better]: Sudoku

This reserve helps delay symptoms of cognitive decline and keeps synapses firing efficiently.

: Unlikely, as sudoku grids are 9x9. 129 is too large for clue count (max 81) and too small for a sum of all cells (405). But in killer sudoku, cages sum to numbers; 129 could be the sum of a specific region. sudoku 129 better