The Triangle Setup - A complete defense against 1.d4 Schachtrainer The Carlsbad structure

The Carlsbad structure

and a doubled pawn's strength or weakness

In Thinking Inside the Box Jacob Aagaard describes his chess improvement philosophy

even describes some old analysis by Botvinnik as 'wishful thinking'

The Triangle Setup - A complete defense against 1.d4 Schachtrainer The Carlsbad structureSemi Slav (1. d4 d5 followed by e7 e6 and c7 c6) is one of the most popular Black opening systems. Black can follow two different concepts. Early Ng8 f6 leads to a number of popular and extensively analyzed systems: Merano Variation, Anti Merano, Botvinnik Variation, Moscow Variation, Anti Moscow, Westphalian Variation, etc. The other concept, where Black foregoes early Ng8 f6, is explained by GM Michal Krasenkow on this DVD. If White plays e2 e3