A Pawn is Worth Three Tempi - Chess Lecture - Volume 94

GM Jesse Kraai explains how to use the old Russian rule set to evaluate Tempo in chess. What is Tempi or Tempo in Chess? “The gaining or losing of time and effectiveness relative to one's continued mobility or developing position, especially with respect to the number of moves required to gain an objective: Black gained a tempo”.

Smerdon's Scandinavian by Smerdon, David

Game Courier -- Comment Listing

GM Jesse Kraai explains how to use the old Russian rule set to evaluate Tempo in chess. What is Tempi or Tempo in Chess? “The gaining or losing of

E-DVD A Pawn is Worth Three Tempi - Chess Lecture - Volume 94

Everyman Chess Archives - British Chess News

Who goes first in the game of chess? - Quora

Chess and Music by Edward Winter

Mark Dvoretsky - Artur Yusupov - School of Chess Excellence 5 - Attack and Defence (1998) PDF, PDF, Chess

Candidates R13: It's Karjakin or Caruana!

Game Courier -- Comment Listing

Chess forum by Grandmasters

Learn Chess Tactics: Discover the Secrets of How to Win Chess Games 1901983986, 9781901983982

The Complete Book of Chess Strategy - Hinsdale South High School