About Razvan Preotu Razvan Preotu earned the Grandmaster title in 2016 at the age of 17. The most notable result during his meteoric rise was at the 2016 Calgary International, which he won outright ahead of a strong international field including five GMs. Books by Razvan Preotu The Chess Attacker's Handbook by (author) Michael Song & Razvan Preotu foreword by Evgeny Bareev