28 July 2013, Kuala Lumpur – Here are the top twenty chess openings as played by International Masters and Grandmasters in May 2013. There were 2,072 games played between 1-31 May 2013 where both players were rated over 2400 Elo.
| Ranking | Movement | Opening | # of Games |
| 1 | King’s Indian Defence | 130 games | |
| 2 | Slav Defence | 114 games | |
| 3 | Nimzo-Indian Defence | 90 games | |
| 4 | Reti Opening | 84 games | |
| 5 | Caro-Kann Defence | 82 games | |
| 6 | Sicilian, Najdorf Variation | 66 games | |
| 7 | English, 1…Nf6 | 65 games | |
| 8 | Queen’s Gambit Declined | 63 games | |
| 9 | 1 d4 Nf6 sidelines | 59 games | |
| 10 | Grunfeld, Classical Var | 59 games | |
| 11 | Sicilian, Kan Variation | 55 games | |
| 12 | English, 1…c5 | 54 games | |
| 13 | Sicilian, 2 Nf3 sidelines | 53 games | |
| 14 | Ruy Lopez, Berlin Defence | 48 games | |
| 15 | Queen’s Indian Defence | 47 games | |
| 16 | Semi-Slav Defence | 45 games | |
| 17 | Sicilian, 2 Nf3 sidelines | 40 games | |
| 18 | English, 1…e5 | 39 games | |
| 19 | Ruy Lopez, closed sidelines | 35 games | |
| 20 | Sicilian, Taimanov Variation | 34 games |
source: TWIC as published in Chess, July 2013 edition.

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