Selected Catalan games

Matlakov-Naiditsch

Open Catalan 5..a6 6.0-0 Nc6

21st European Teams rd8

After 20.Bxc7(Diagram)

Black is a pawn down. How should the defence be conducted?

After 20.Bxc7

Bosiocic-Yilmaz

Open Catalan 5..c5,6..Nc6

21st European Teams rd9

After 37..Ra8(Diagram)

White needs to do something otherwise ..a5-a4 etc is coming.

What do you recommend?

After 37..Ra8

Bosiocic-Gharamian

Open Catalan 7.Qc2 b6

21st European Teams rd8

After 15..ed(Diagram)

Black got into trouble early by unnecessarily allowing Nc6 and made matters worse with a bad pawn sacrifice.

White is two pawns up and looking to cash in for the full point. What do you suggest?

After 15..ed