Slav 4…a6 5.a4[D15]-TWIC 965

Slav 4…a6(The Chebanenko Slav)
This branch of the Slav is now a major opening. Various ways to break this defence have been suggested and tried. The main positional line is 5.c5 which is advocated by Schandorff in Playing 1.d4-The Queen's Gambit(Quality Chess 2012).

Here a tribute to the inventor-Chebanenko




Here's a brief intro to the Chebanenko




TWIC 965
GM Petkov,V played 5.a4 in the feature game and took big risks for an attack in rd4 of the Llucmajor Open. Petkov shared first place with 7/9.

Here is the feature game.

Petkov,V (2566) - Krivoshey,S (2483)
Slav 4…a6 5.a4[D15]
Llucmajor Open 2013 Llucmajor ESP (4.1), 01.05.2013

Position 1
White has invested a piece for the attack but black has everything defended so far. What do you recommend for white?

White to Play

26..Qc5