Logic
Sudoku, kakuro, nonograms, riddles: rules, strategies and game ideas for anyone who loves deduction.
11 articles
Logic games for high school students: prep for admissions tests 
No-timer logic games online: play at your own pace 
Elimination deduction games online: think like Sherlock 
Online Secret Code Games: Decode and Encrypt 
Online logical problem-solving games 
Online Logical Reasoning Test: Check Your Level 
Online Logic Puzzles: Reasoning and Deduction 
Online Logic Riddles: Solve Deduction Puzzles 
Online logical sequences: find the hidden rule 
Advanced Sudoku Online: Master Expert Techniques 
Free Online Kakuro: rules, strategies, and where to play