Meet the Author
Leonard J. Barr
"L3nnyB23"
Leonard Barr is a chess educator, author, and creator known online as L3nnyB23. His chess journey began in 2001 and has grown into a lifelong passion for the strategy, beauty, and discipline of the game. The 15 Principles gathered in his book are the distillation of a quarter-century of play, study, and reflection.
This page is a living document — Leonard verifies and adds his own milestones, memories, and rating as the story continues to unfold from 2001 to 2026 and beyond.
Find L3nnyB23 online
The story behind the 15 Principles
Over years of play and teaching, Leonard noticed the same ideas winning games again and again — checks, captures, skewers, pins, discovered attacks, and the quiet discipline of always looking one move ahead. The 15 Principles are his way of passing those ideas on, free, to anyone who wants to improve.
The Journey · 2001–2026
Timeline milestones are being added. Check back soon.
A foundation for what's next
More books, lessons, and projects are on the way. This is just the opening move.
Explore the book