What is my next best move?

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Avatar of GeorgSchaechinger

I am white and it's my turn. Can anyone help me? I cannot figure out what my next best move is and why.

Avatar of Philly499

I'm not very good but I'd move a3 I assume he will Na2 and Ra1

Avatar of clemctte
Je suis noir et c’est mon tour, ai je encore une solution ?