CD Top TNT No 4 covers the top tournaments played from May 1st to August 31st, 2009.

It brings three theoretical articles elaborating on the most important continuations (C 42, E 04, E 97).

A database of important games played during this period are available in four different formats (CI Expert, PGN, ChessBase, Chess Assistant). Each game contains a precisely defined novelty with additional information from Chess Informants and Encyclopaedia of Chess Openings.

In 4 different formats (CIE, PGN, CBH, CA)