50THBirthday

Size:

12x12.

Elements:

5, 0, T, H, B, i, r, t, h, d, a, and y.

Groups: Thirty-six total.

The 12 rows.

The 12 columns.

The 12 4x3 rectangles.

Instructions:

Precise details on group numbering.

Answer grids:

Puzzle Difficulty levels and Examples

Difficulty Level	Low	High	Example
Easiest	2	2	Puzzle   ·   3-steps   ·   All-steps   ·   Solution grid
Easy	3	4	Puzzle   ·   3-steps   ·   All-steps   ·   Solution grid
Medium	5	8	Puzzle   ·   3-steps   ·   All-steps   ·   Solution grid
Difficult	9	14	Puzzle   ·   3-steps   ·   All-steps   ·   Solution grid
Challenging	15	20
Tournament	21	29
TournamentPlus	30	45
Perplexing	46	60