3Doku

3Doku challenges you to solve a 3D Sudoku puzzle with numbers 1–16. Rotate the cube, follow rows and columns and sharpen your logic with daily puzzles.

INTRODUCTION

3Doku puts a fresh spin on classic Sudoku by wrapping the puzzle around a three-dimensional cube. Instead of working with numbers 1–9 on a flat grid, players use numbers 1–16 across six connected faces. Every move requires careful thinking, pattern recognition, and a good sense of how each side connects to the next.

Daily puzzles offer a fun challenge for teens who enjoy brain teasers and logic games. Monday puzzles start gently, while the difficulty increases throughout the week. Saturday brings tougher challenges, and Sunday features a wildcard puzzle. Helpful hints and automatic pencil marks also make tricky grids easier to manage without taking away the fun.

How to Play 3Doku

The goal is to complete the cube so that every face contains the numbers 1–16, with no repeats in any row or column. Each face follows Sudoku-style rules, but the connected cube adds an extra twist.

• Study each face: Look at the existing numbers and identify the empty cells that need to be filled.
• Check rows and columns: Each row and column must contain the numbers 1–16 exactly once.
• Follow the edges: Rows and columns continue across the cube's edges onto neighboring faces. Track these connections all the way around until they return to the starting face.
• Fill in the missing numbers: Use logic and the available clues to find the correct number for each empty cell.
• Use helpful tools: Select the highlighter tool and choose “groups for cell” mode to highlight the rows and columns connected to a particular cell. Hints and automatic pencil marks can also help narrow down possible answers.

Why Play 3Doku?

3Doku combines familiar Sudoku logic with a unique 3D layout that keeps every puzzle interesting. The daily difficulty curve gives beginners room to learn and experienced puzzle fans a reason to return. Its highlighting tools, hints, and pencil marks make the challenge approachable while still rewarding careful planning.

Patience, logical thinking, and attention to detail are the keys to mastering the cube. Each completed puzzle brings a satisfying sense of progress, one number at a time.