Time to start

 My choice for a new repertoire seems to be fairly definite. I'm very happy with it, and have the feeling for the first time that these are the openings I want to play for the next years:

• London system Jobava variation
• Sicilian accelerated dragon
• Leningrad dutch defense

You might notice that the hyper has disappeared from the accelerated dragon. At the moment I don't think that the Rossolimo is worth a special treatment in order to avoid it. But insights might change overtime.

We agreed on the following method to improve: build concepts that are transferable to different positions. So that is what I'm going to try. I score well with the London, therefore I will focus on the black repertoire. For the dragon I'm waiting for the treatise of GM Hungaski about the Maroczy, which is in the making at Chessable. So I start with the Leningrad. Base is the work of FM Michiel Abeln about the Leningrad at Chessable.

So what are the possible concepts which need a closer investigation? To name a few:

• 1. ... f5 is designed to create an imbalance from move 1. Not quite unlike the Sicilian. In certain variations you get a Kings Indian with two tempi up, since you don't block your f pawn with Nf6 from the start.
• 1. ... f5 is usable against all first moves of white except for 1. e4 or 1. g4
• There are quite a few anti dutch system around, but none is played twice by the same white player. They are not dangerous, but you need to be prepared
• the thrust e5 is a common theme for black. What needs to be worked out is the WHY behind this thrust. When is the thrust beneficial or even possible, and why is it beneficial.
• The danger of Qb3 in combination with Ng5
• The double attack of Qb3+ against Kg8 and b7
• When Qb6 works against Qb3 and when not
  
• Na6 or Nd7
• not Qe8 but Qe7
  
• moving Bc8 only when b7 is save
• points of pressure b7, e6 and f7
• wing attack when the center is secure
• what decides on which wing to attack
• themes of the kingside attack
• themes of the queenside attack

Let's see what we can come up with.