When accuracy matters, IM Vaishali Rameshbabu plays with extreme precision. You can test your own accuracy with this position from her sixth round win over IM Elisabeth Pähtz. Black (Pähtz) has just played 59… d1=Q. Having promoted to a queen a half move ahead of her opponent, White (Rameshbabu) has a winning advantage but must be precise. In fact, IM Vaishali Rameshbabu starts a mate in 10 sequence! What was her move and how does it lead to a mate in 10?
Bonus question: Who is IM Vaishali Rameshbabu’s brother?