user5653: When and what was the last open tournament that Vishy Anand participated in before this 2016 Gibraltar Open? 

user1485: The 1993 Biel Interzonal according to The Hindu.

5653: <p>When and what was the last open tournament that Vishy Anand participated in before this 2016 Gibraltar Open? </p>
 1485: <p>The 1993 Biel Interzonal according to <a href="http://www.thehindu.com/sport/other-sports/viswanathan-anand-back-in-open-tournament-after-23-years/article8154597.ece" rel="nofollow">The Hindu</a>.</p>
