Some calculation is needed as the obvious sequence 2. Nxa5 Qxa5 3. Bxb7 loses a piece. You have to flick in 2. .. Bxe4. But with two minor pieces being exchanged, the position is changing.soheil_hooshdaran wrote: What is wrong with 1..Na5
Otherwise .. Na5 looks sensible to evict the well placed Knight from c4.