Guinness World Record Holder — Most Syndicated Puzzle Compiler

Science-Based Brain Training from the World Record Holder

6 research-backed cognitive exercises designed by Timothy E. Parker. Train working memory, attention, processing speed, and more — backed by peer-reviewed neuroscience.

Start Training Free See the Science
6
Cognitive Domains
6
Peer-Reviewed Citations
180M+
Puzzle Solvers Reached
30+
Years of Expertise

The Science Behind the Training

Every exercise is based on landmark cognitive science research.

🧠
Working Memory
Dual N-Back
Track position and color N trials back. Based on Jaeggi et al. (2008) showing fluid intelligence gains from working memory training.
PNAS, 105(19), 6829-6834
🎨
Executive Function
Stroop Challenge
Identify ink colors while ignoring conflicting word content. The Stroop effect (1935) is the gold standard for measuring inhibitory control.
J. Experimental Psychology, 18(6)
🔎
Attention
Flanker Focus
Identify the center target amid distractors. Eriksen & Eriksen (1974) demonstrated selective attention under interference conditions.
Perception & Psychophysics, 16(1)
🔄
Spatial Reasoning
Mental Rotation
Judge whether shapes are same-rotated or mirrored. Shepard & Metzler (1971) revealed the analog nature of spatial representation.
Science, 171(3972)
⚡
Processing Speed
Trail Blazer
Connect alternating number-letter nodes under time pressure. The Trail Making Test (Reitan, 1958) measures cognitive flexibility and processing speed.
Perceptual & Motor Skills, 8(3)
📝
Verbal Memory
Word Links
Study and recall word pair associations. Deese (1959) established the paired-associate paradigm for verbal memory research.
J. Experimental Psychology, 58(1)
Start Your First Exercise

Latest Articles

Fresh content published regularly by Timothy E. Parker.

All Crossword DesignWord PuzzlesLogic & StrategyPuzzle HistoryPro TechniquesCompetitions
🎓
Crossword Design
How to Create a Crossword Puzzle from Scratch
The step-by-step process I use to create puzzles for 180 million solvers. Grid construction, theme development, and clue writing.
Timothy E. Parker · New
📚
Word Puzzles
The 7 Types of Word Puzzles Every Solver Should Know
From anagrams to cryptograms, each word puzzle type trains a different cognitive skill. Master all seven for complete brain fitness.
Timothy E. Parker · New
🧠
Logic & Strategy
Logic Puzzle Solving: The Elimination Method
The single most powerful technique for solving logic puzzles. Once you learn elimination, puzzles that took 30 minutes take 5.
Timothy E. Parker · New
📖
Puzzle History
The Surprising History of the Crossword Puzzle
From Arthur Wynne's 1913 diamond-shaped grid to today's digital puzzles — the evolution of America's favorite word game.
Timothy E. Parker · New
⚡
Pro Techniques
Speed Solving: How Competition Puzzlers Think
Inside the minds of competitive puzzle solvers. The pattern recognition shortcuts and mental models they use to solve in seconds.
Timothy E. Parker · New
🏆
Competitions
Getting Started in Puzzle Competitions
From local crossword tournaments to the American Crossword Puzzle Tournament — your guide to competitive puzzle solving.
Timothy E. Parker · New

About the Creator

Learn directly from the Guinness World Record holder.

Timothy E. Parker

Timothy E. Parker

Guinness World Records Puzzle Master

Timothy E. Parker is the Guinness World Record holder as the world's most syndicated puzzle compiler, reaching 180 million solvers across 6 continents. He has authored dozens of puzzle books and created thousands of crosswords, word searches, and logic puzzles published in major newspapers worldwide.

From the Creator

Products and assessments by Timothy E. Parker.

🧠

Brain Training

6 science-based cognitive exercises with adaptive difficulty.

Train Now
🧠

Real World IQ Test

6-region cognitive assessment by the Puzzle Master.

Take the Test
🔢

SumCruncher

Daily number puzzles for mathematical training.

Play Free
🎯

Brain Games Hub

Daily brain training games and challenges.

Play Free
📚

Bible Brilliant

13 Bible games with 4,000+ questions.

Play Free

Join the Academy

Weekly lessons, techniques, and behind-the-scenes puzzle creation from the Guinness Record Holder.