Player profile
Costello, Colin A
Dossier
31 of 35 games analyzed.
Accuracy: 84.9%
Opened c4: 11/11
Castled kingside: 20Same-side castling: 18Opposite-side castling: 1
Played on the queenside: 11Fianchettoed kingside: 8Fianchettoed queenside: 8Played in the center: 6Played on the kingside: 1
Kept the bishop pair: 14Backward pawn: 14Space advantage: 13Initiated exchanges: 13Active pieces: 11Isolated pawn: 10Sacrificed material: 8Missed tactics: 7Avoided exchanges: 7
Openings
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As White 13 games 4W 4D 5L
English Opening 8 games 1W 3D 4L
King's English Variation 5 games 1W 2D 2L
Four Knights Variation, Fianchetto Line
2 games
0W
1D
1L
(unspecified)
1 game
0W
0D
1L
Kramnik-Shirov Counterattack
1 game
1W
0D
0L
Four Knights Variation, Flexible Line
1 game
0W
1D
0L
Agincourt Defense 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Great Snake Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Anglo-Dutch Defense 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Semi-Slav Defense 2 games 2W 0D 0L
Chigorin Defense 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Slav Defense 1 game 1W 0D 0L
Quiet Variation 1 game 1W 0D 0L
Schallopp Defense
1 game
1W
0D
0L
Queen's Gambit Declined 1 game 0W 1D 0L
Vienna Variation 1 game 0W 1D 0L
Quiet Variation
1 game
0W
1D
0L
French Defense 1 game 0W 0D 1L
Steiner Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
As Black 10 games 1W 4D 5L
Italian Game 4 games 0W 1D 3L
Classical Variation 2 games 0W 1D 1L
Giuoco Pianissimo
2 games
0W
1D
1L
Scotch Gambit 1 game 0W 0D 1L
Janowski Defense
1 game
0W
0D
1L
Giuoco Pianissimo 1 game 0W 0D 1L
Normal
1 game
0W
0D
1L
Bogo-Indian Defense 2 games 0W 1D 1L
Retreat Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Grünfeld Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Nimzo-Larsen Attack 1 game 0W 0D 1L
Modern Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Queen's Pawn Game 1 game 0W 1D 0L
Torre Attack 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Polish Opening 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Nimzo-Indian Defense 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Blunders Top 4 of 156
This player's costliest moves in analyzed games. Can you find the winning move?
Games Showing all 35 games
| Date | Event | Round | Color | Opponent | Result | Accuracy % | First moves |
|---|---|---|---|---|---|---|---|
| 2026.10.16 | Offene S?chsische Senioren-Einzelmeisterschaft 2026 | 1.1 | 2026.10.16 Heck, Norbert (4622928) (2241) | 0 | 81.80% | 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 | |
| 2026.07.30 | Round 1: Costello, Colin A - Eilenberg, Jonas | 1.1 | 2026.07.30 Eilenberg, Jonas (16204271) (2388) | 0 | 86.10% | 1. c4 e5 2. Nc3 d6 3. Nf3 f5 | |
| 2026.07.06 | Round 1: Costello, Colin A - Farrand, Tom | 1.8 | 2026.07.06 Farrand, Tom (406457) (2077) | 0 | 84.20% | 1. c4 e6 2. Nf3 f5 3. Nc3 Nf6 | |
| 2026.02.21 | Round 2: Costello, Colin A - Cooper, Malcolm H | 2.8 | 2026.02.21 Cooper, Malcolm H (469580) (1764) | 1 | - | 1. Nf3 d5 2. d4 Nf6 3. c4 c6 | |
| 2026.02.20 | Round 1: Pasqualetto, Lorenzo - Costello, Colin A | 1.7 | 2026.02.20 Pasqualetto, Lorenzo (855170) (1868) | 0 | - | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 | |
| 2025.05.28 | Round 1: Vavulin, Maxim - Costello, Colin A | 1.1 | 2025.05.28 Vavulin, Maxim (4169530) (2542) | 0 | 86.50% | 1. b3 e5 2. Bb2 Nc6 3. e3 Nf6 | |
| 2025.02.23 | Round 5: Costello, Colin A - Tarrant-Edwards, Philip | 5.6 | 2025.02.23 Tarrant-Edwards, Philip (343446124) (1768) | ½ | 93.00% | 1. c4 e6 2. Nf3 d5 3. d4 Nf6 | |
| 2025.02.23 | Round 4: Catabay, Mae Katelyn Rose - Costello, Colin A | 4.5 | 2025.02.23 Catabay, Mae Katelyn Rose (484768) (1825) | ½ | 97.00% | 1. d4 Nf6 2. Nf3 d5 3. Bg5 e6 | |
| 2025.02.22 | Round 3: Costello, Colin A - Catabay, Rezin C | 3.4 | 2025.02.22 Catabay, Rezin C (487686) (1764) | ½ | 88.20% | 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 | |
| 2025.02.22 | Round 2: Tso, Chi Wai - Costello, Colin A | 2.4 | 2025.02.22 Tso, Chi Wai (343461417) | ½ | 87.90% | 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ | |
| 2025.02.21 | Round 1: Costello, Colin A - Lloyd, Joel | 1.4 | 2025.02.21 Lloyd, Joel (343446809) | 1 | 97.50% | 1. c4 Nf6 2. Nc3 c6 3. Nf3 d5 | |
| 2025.02.21 | Round 6: Saxena, Advik - Costello, Colin A | 6.5 | 2025.02.21 Saxena, Advik (343423892) (1791) | ½ | 81.90% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 | |
| 2025.02.20 | Round 5: Costello, Colin A - Bowley, Clive | 5.3 | 2025.02.20 Bowley, Clive (445401) | ½ | 94.00% | 1. c4 g6 2. Nc3 Bg7 3. Nf3 d6 | |
| 2025.02.20 | Round 4: Costello, Colin A - Mottram, Paul | 4.8 | 2025.02.20 Mottram, Paul (451266) (1755) | 1 | 57.40% | 1. c4 c6 2. Nf3 d5 3. d4 Nf6 | |
| 2025.02.19 | Round 3: Foo, Jiu Weir Brien - Costello, Colin A | 3.2 | 2025.02.19 Foo, Jiu Weir Brien (5726786) (1856) | 0 | 68.60% | 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ | |
| 2025.02.18 | Round 2: Costello, Colin A - Warner, Nicholas | 2.4 | 2025.02.18 Warner, Nicholas (343414400) (1785) | 1 | - | 1. c4 e5 2. Nc3 Bb4 3. Nf3 Bxc3 | |
| 2025.02.18 | Round 1: Sainbayar, Anuurai - Costello, Colin A | 1.5 | 2025.02.18 Sainbayar, Anuurai (404047) (1682) | 1 | 83.50% | 1. b4 e5 2. Bb2 Bxb4 3. Bxe5 Nf6 | |
| 2024.11.17 | Round 5: Costello, Colin A - Shevchenko, Igor | 5.23 | 2024.11.17 Shevchenko, Igor (34634924) (1776) | 0 | 85.80% | 1. c4 e6 2. e4 d5 3. cxd5 exd5 | |
| 2024.11.17 | Round 4: Heirich, Andreas - Costello, Colin A | 4.23 | 2024.11.17 Heirich, Andreas (24600857) (1933) | ½ | 82.40% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2024.11.16 | Round 3: Costello, Colin A - Beckmann, Jonathan | 3.22 | 2024.11.16 Beckmann, Jonathan (34672591) (1860) | ½ | 82.50% | 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 | |
| 2024.11.16 | Round 2: Stoeber, Alexander - Costello, Colin A | 2.15 | 2024.11.16 Kleber, Alexander (16211766) (2018) | 0 | 88.60% | 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 | |
| 2024.11.15 | Round 1: Costello, Colin A - Laube, Reiner | 1.9 | 2024.11.15 Laube, Reiner (24680486) (2140) | 0 | 83.10% | 1. c4 f5 2. Nf3 Nf6 3. Nc3 g6 | |
| 2024.10.12 | Round 1: Boesel, Alexander - Costello, Colin A | 1.28 | 2024.10.12 Boesel, Alexander (4623185) (2045) | 0 | 87.10% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 | |
| Round 5: Boganadham, Ved Sudeep - Costello, Colin A | 5.14 | Boganadham, Ved Sudeep (343436048) (1731) | ½ | 95.00% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 | ||
| Round 4: Costello, Colin A - Jamie Barnes | 4.13 | Jamie Barnes | 0 | 81.70% | 1. c4 c5 2. Nc3 Nc6 3. Nf3 Nf6 | ||
| Round 3: Collier, James P - Costello, Colin A | 3.16 | Collier, James P (343454160) (1728) | 1 | 86.10% | 1. e4 e5 2. f4 Bc5 3. Nf3 d6 | ||
| Round 2: Costello, Colin A - Ichim, Grieg | 2.15 | Ichim, Grieg (343441890) | 0 | 75.60% | 1. c4 Nf6 2. Nc3 c5 3. Nf3 Nc6 | ||
| Round 1: Ashton, Adam G - Costello, Colin A | 1.3 | Ashton, Adam G (410110) (2274) | 0 | - | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | ||
| Round 7: Pickles, Stephen - Costello, Colin A | 7.10 | Pickles, Stephen (3200442) (2280) | 1 | 96.20% | 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 | ||
| Round 6: Costello, Colin A - De Coverly, Roger D | 6.20 | De Coverly, Roger D (405213) (1969) | 1 | 90.70% | 1. c4 Nf6 2. Nc3 g6 3. Nf3 Bg7 | ||
| Round 5: Habershon, Paul F - Costello, Colin A | 5.7 | Habershon, Paul F (409065) (1959) | ½ | 95.80% | 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 | ||
| Round 4: Costello, Colin A - Clark, Robert G | 4.5 | Clark, Robert G (421162) (1991) | ½ | 92.00% | 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 | ||
| Round 3: Moore, Geoffrey R - Costello, Colin A | 3.6 | Moore, Geoffrey R (446181) (1996) | ½ | 95.40% | 1. Nf3 d5 2. g3 Nf6 3. Bg2 Nbd7 | ||
| Round 2: Costello, Colin A - Clancy, Martin J | 2.24 | Clancy, Martin J (2403404) (1765) | 1 | 94.50% | 1. c4 Nf6 2. Nc3 g6 3. Nf3 Bg7 | ||
| Round 1: James, Geoffrey H - Costello, Colin A | 1.1 | James, Geoffrey H (402346) (2088) | 0 | 86.30% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 |