Player profile
Clasby, Derek
Dossier
14 of 14 games analyzed.
Accuracy: 93.2%
Opened e4: 5/5
Castled kingside: 9Same-side castling: 9
Played on the queenside: 5Played in the center: 2Fianchettoed queenside: 1Fianchettoed kingside: 1
Active pieces: 8Kept the bishop pair: 6Initiated exchanges: 6Backward pawn: 4Isolated pawn: 3Space advantage: 3Sacrificed material: 2Avoided exchanges: 2Missed tactics: 1
Openings
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As White 5 games 2W 2D 1L
Ruy Lopez 3 games 0W 2D 1L
Closed 2 games 0W 1D 1L
Breyer Defense, Zaitsev Hybrid
1 game
0W
1D
0L
(unspecified)
1 game
0W
0D
1L
Morphy Defense 1 game 0W 1D 0L
Møller Variation
1 game
0W
1D
0L
Sicilian Defense 1 game 1W 0D 0L
Chekhover Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Italian Game 1 game 1W 0D 0L
Giuoco Pianissimo 1 game 1W 0D 0L
Italian Four Knights Variation
1 game
1W
0D
0L
As Black 4 games 0W 1D 3L
Nimzo-Indian Defense 2 games 0W 1D 1L
Normal Variation 1 game 0W 1D 0L
Botvinnik System
1 game
0W
1D
0L
Classical Variation 1 game 0W 0D 1L
Noa Variation
1 game
0W
0D
1L
Ruy Lopez 1 game 0W 0D 1L
Closed 1 game 0W 0D 1L
Chigorin Defense
1 game
0W
0D
1L
English Opening 1 game 0W 0D 1L
Symmetrical Variation 1 game 0W 0D 1L
Fianchetto Variation
1 game
0W
0D
1L
Blunders Top 4 of 56
This player's costliest moves in analyzed games. Can you find the winning move?
Games Showing all 14 games
| Date | Event | Round | Color | Opponent | Result | Accuracy % | First moves |
|---|---|---|---|---|---|---|---|
| 2026.07.05 | 54th World Open - 2026 | 9.15 | 2026.07.05 Shvarts, Tim (39927830) (1990) | ½ | 93.60% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2026.07.05 | 54th World Open - 2026 | 8.14 | 2026.07.05 Baron, Tal (2809958) (2410) | ½ | 93.60% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2026.07.04 | 54th World Open - 2026 | 6.5 | 2026.07.04 Xue, Haowen (8625492) (2553) | 0 | 93.30% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2026.07.03 | 54th World Open - 2026 | 5.17 | 2026.07.03 Kaplan, Avi Harrison (30934559) (2251) | 1 | 97.10% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2026.07.02 | 54th World Open - 2026 | 2.22 | 2026.07.02 Jammalamadaka, Vihaan (30977134) (2109) | 0 | 89.00% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.07.03 | Round 3: Xiong, Jeffery - Clasby, Derek | 3.1 | 2025.07.03 Xiong, Jeffery (2047640) (2646) | 0 | 93.50% | 1. c4 Nf6 2. Nc3 c5 3. g3 g6 | |
| 2024.07.06 | 52nd Annual World Open | 6.16 | 2024.07.06 Urazayev, Arystanbek (13709810) (2476) | ½ | 95.50% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2024.07.05 | 52nd Annual World Open | 4.39 | 2024.07.05 Slade, Theodore (426547) (2109) | 1 | 94.70% | 1. e4 e5 2. Nc3 Nf6 3. Bc4 Bc5 | |
| 2024.07.04 | Round 2: Clasby, Derek - Durarbayli, Vasif | 2.2 | 2024.07.04 Durarbayli, Vasif (13402935) (2628) | 0 | 88.20% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2023.08.16 | Round 9: Derek Clasby - Pedro Espinosa | 2023.08.16 Pedro Espinosa | 1 | 91.30% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | ||
| 2023.08.14 | Round 6: Aaron Jacobson - Derek Clasby | 2023.08.14 Aaron Jacobson | 0 | 87.70% | 1. d4 Nf6 2. c4 g6 3. Nc3 d5 | ||
| 2023.08.14 | Round 5: Derek Clasby - Zachary Tanenbaum | 2023.08.14 Zachary Tanenbaum | 0 | 94.40% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | ||
| 2023.08.13 | Round 4: Qi Pang - Derek Clasby | 2023.08.13 Qi Pang | 1 | 92.90% | 1. Nf3 Nf6 2. d4 g6 3. g3 b6 | ||
| 2023.08.12 | Round 2: luka BUDISAVLJEVIC - Derek Clasby | 2023.08.12 luka BUDISAVLJEVIC | 0 | 89.50% | 1. Nf3 Nf6 2. c4 e6 3. b3 d5 |