Rated Sudoku

Rated Sudoku is a Sudoku game for learning, solving, analyzing, editing, generating and painting standard 9x9 puzzles. Its solving engine identifies applicable techniques and explains the logic behind eliminations.

Play and learn

You can ask for one of two levels of hints while solving. A vague hint partially highlights a technique; a detailed hint provides full highlighting and an explanation. The skill input system applies eliminations automatically: select a relevant cell and a skill, such as Fish, and the game makes the eliminations if that skill applies. If it does not apply to the selected cell, nothing happens.

Campaign mode teaches Sudoku from the basics through intermediate and advanced strategies, with explanations, diagrams and practice puzzles. It covers Obvious and Hidden Singles, Hidden and Obvious Sets, and patterns such as X-Wings, XYZ-Wings and Skyscrapers.

Analyze and practice

The Analyze feature searches a grid for all applicable techniques and explains their elimination logic. You can use it to study a particular puzzle or technique. Custom Game also includes partial puzzles that start at the point where you need to find a specific pattern and make its eliminations.

Create and share

The Sudoku Editor lets you create puzzles, while the generator produces new puzzles from easy to expert and lets you choose symmetry patterns. Sudoku Paint lets you make and export visual diagrams of solving strategies using tools to highlight cells and candidates, draw chains and add text.

Supported techniques

The solver supports a wide range of techniques, including:

• Obvious Sets, including Singles, Pairs and Triples
• Hidden Sets, including Singles, Pairs and Triples
• Fish Patterns, including Pointing, Claiming, X-Wing, Swordfish, Jellyfish, Finned Fish and Mutant Fish
• The XYZ-Wing family, including XY-Wing, XYZ-Wing and generalized XYZ-Wing patterns
• Unique Loops, including Unique Rectangle Types 1–4 and 6, Hidden Loop and Avoidable Loop
• Extended Rectangles, including Types 1–4 and 6, Hidden Extended Rectangle and Avoidable Extended Rectangle
• BUG Patterns (Bivalue Universal Grave), including Types 1–4 and 6, Hidden BUG
• AIC Chains (Alternate Inference Chains), including X-Chains, XY-Chains, Two-String Kite, Skyscraper, AIC Types 1 and 2, and continuous and discontinuous loops
• Grouped AIC Chains, including Empty Rectangle, Grouped X-Chains, Grouped AIC Types 1 and 2, and grouped continuous and discontinuous loops
• ALS Chains (Almost Locked Set Chains and Loops), including ALS-XZ and ALS-XY-Wing
• ALS Blossom patterns, also known as Death Blossom
• Sue de Coq

The game supports standard 9x9 Sudoku rules only; it does not include variants such as Killer Sudoku.