I agree,b4 also wins.İnfact black’s position is almost hopeless.The pieces are jailed between the pawns.For instance; 1.b4 KxN 2.bxa5 and whatever black plays,opponent wins Ra3.İn both lines(i mean Nc5 and b4) the strong white Quenn takes role on open diagonal.
1. Nc5. Nice!!
1.Nc5 bc5(1…dc5 2.Rd7)2.Ra3 and no remedy for Ra5. 2…Kb8 3.Ra5 and Ra8 for mate.
1.Nc5 is the best move, but doesn’t 1.b4 also win?
I agree,b4 also wins.İnfact black’s position is almost hopeless.The pieces are jailed between the pawns.For instance; 1.b4 KxN 2.bxa5 and whatever black plays,opponent wins Ra3.İn both lines(i mean Nc5 and b4) the strong white Quenn takes role on open diagonal.