Player profile
Jacobs, Calvin Nicholas
Dossier
22 of 29 games analyzed.
Accuracy: 91.4%
Opened e4: 10/14Opened b3: 4/14
Castled kingside: 15Same-side castling: 9Did not castle: 6Opposite-side castling: 4Castled queenside: 1
Played on the kingside: 9Played in the center: 8Fianchettoed queenside: 6Played on the queenside: 5Fianchettoed kingside: 3
Backward pawn: 16Active pieces: 15Kept the bishop pair: 13Initiated exchanges: 12Space advantage: 11Sacrificed material: 11Isolated pawn: 9Avoided exchanges: 7Missed tactics: 5Played gambits: 2
Openings
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As White 16 games 7W 6D 3L
Sicilian Defense 7 games 2W 4D 1L
Smith-Morra Gambit Accepted 4 games 2W 2D 0L
(unspecified)
1 game
1W
0D
0L
Scheveningen Formation
1 game
0W
1D
0L
Fianchetto Defense
1 game
1W
0D
0L
Kan Formation
1 game
0W
1D
0L
Alapin Variation 2 games 0W 1D 1L
Smith-Morra Declined
2 games
0W
1D
1L
Smith-Morra Gambit 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Nimzo-Larsen Attack 4 games 3W 0D 1L
Modern Variation 2 games 2W 0D 0L
(unspecified)
2 games
2W
0D
0L
Classical Variation 2 games 1W 0D 1L
(unspecified)
2 games
1W
0D
1L
Caro-Kann Defense 2 games 1W 1D 0L
Maróczy Variation 2 games 1W 1D 0L
(unspecified)
2 games
1W
1D
0L
French Defense 2 games 1W 1D 0L
Two Knights Variation 2 games 1W 1D 0L
(unspecified)
2 games
1W
1D
0L
Italian Game 1 game 0W 0D 1L
Scotch Gambit 1 game 0W 0D 1L
Max Lange Attack
1 game
0W
0D
1L
As Black 13 games 5W 3D 5L
Sicilian Defense 8 games 2W 2D 4L
Four Knights Variation 3 games 1W 0D 2L
Cobra Variation
2 games
1W
0D
1L
(unspecified)
1 game
0W
0D
1L
Closed 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Scheveningen Variation 1 game 1W 0D 0L
Keres Attack
1 game
1W
0D
0L
French Variation 1 game 0W 0D 1L
Normal
1 game
0W
0D
1L
Kramnik Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Taimanov Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Dutch Defense 4 games 3W 0D 1L
Leningrad Variation 3 games 2W 0D 1L
Warsaw Variation
3 games
2W
0D
1L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
English Opening 1 game 0W 1D 0L
Anglo-Dutch Defense 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Blunders Top 4 of 104
This player's costliest moves in analyzed games. Can you find the winning move?
Games Showing all 29 games
| Date | Event | Round | Color | Opponent | Result | Accuracy % | First moves |
|---|---|---|---|---|---|---|---|
| 2025.07.05 | South African Chess Open | 11.7 | 2025.07.05 Hercules, Benjamin Vincent (14301938) (2084) | ½ | 96.20% | 1. e4 c6 2. d4 d5 3. f3 dxe4 | |
| 2025.07.04 | South African Chess Open | 10.3 | 2025.07.04 Simpson, Michael (14338882) (2204) | 0 | 88.30% | 1. e4 c5 2. Ne2 e6 3. d4 cxd4 | |
| 2025.07.04 | South African Chess Open | 9.2 | 2025.07.04 Beukes, Dante M (15200540) (2246) | ½ | 98.20% | 1. e4 c5 2. d4 cxd4 3. c3 Nf6 | |
| 2025.07.03 | South African Chess Open | 8.6 | 2025.07.03 Peter, Neathan (14323648) (2075) | 1 | 90.10% | 1. e4 c5 2. d4 cxd4 3. c3 dxc3 | |
| 2025.07.02 | South African Chess Open | 7.5 | 2025.07.02 Van Zyl-Rudd, Jack (14309017) (2228) | 1 | - | 1. d4 f5 2. Bf4 Nf6 3. e3 d6 | |
| 2025.07.01 | South African Chess Open | 6.8 | 2025.07.01 Palmer, Reegan (14322145) (2057) | ½ | 96.00% | 1. e4 e6 2. Nf3 d5 3. Nc3 Nf6 | |
| 2025.06.30 | South African Chess Open | 5.10 | 2025.06.30 Felix, Raphael (14339544) (2227) | 1 | 93.60% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2025.06.29 | South African Chess Open | 4.9 | 2025.06.29 Mahlangu, Sello (14334623) (2015) | 0 | - | 1. d4 f5 2. Nf3 Nf6 3. g3 g6 | |
| 2025.06.28 | South African Chess Open | 3.10 | 2025.06.28 Smit, Devon (14330849) (1915) | 1 | 89.80% | 1. b3 e5 2. Bb2 Nc6 3. Nf3 e4 | |
| 2025.06.28 | South African Chess Open | 1.5 | 2025.06.28 Oatlhotse, Providence (11300507) (2241) | 0 | 89.10% | 1. b3 d5 2. Bb2 Bf5 3. e3 Nf6 | |
| 2025.04.29 | Round 6: Celso Andre Manjate - Jacobs, Calvin Nicholas | 6.7 | 2025.04.29 Manjate, Celso Andre (14800802) (1898) | 0 | - | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2025.04.28 | Round 5: Jacobs, Calvin Nicholas - Mmola, Tumelo | 5.11 | 2025.04.28 Mmola, Tumelo (14352516) (1840) | 1 | 97.90% | 1. e4 e6 2. Nf3 d5 3. Nc3 Nf6 | |
| 2025.04.28 | Round 4: Mathebula, Xolani Cebo - Jacobs, Calvin Nicholas | 4.10 | 2025.04.28 Mathebula, Xolani Cebo (14328771) (1874) | ½ | - | 1. e4 c5 2. Nc3 e6 3. Nf3 Nc6 | |
| 2025.04.27 | Round 3: Jacobs, Calvin Nicholas - Sarakusebwa, Shepard | 3.6 | 2025.04.27 Sarakusebwa, Shepard (14372533) (1828) | ½ | - | 1. e4 c5 2. d4 cxd4 3. c3 dxc3 | |
| 2025.04.27 | Round 2: Mashigo, Hluli - Jacobs, Calvin Nicholas | 2.8 | 2025.04.27 Mashigo, Hluli (14322749) (1800) | 1 | - | 1. d4 f5 2. g3 Nf6 3. Bg2 g6 | |
| 2025.04.26 | Round 1: Jacobs, Calvin Nicholas - Dortley, Devon | 1.9 | 2025.04.26 Dortley, Devon (14327740) (1731) | 1 | - | 1. e4 c5 2. d4 cxd4 3. c3 dxc3 | |
| 2024.09.29 | Round 9: Jacobs, Calvin Nicholas - Ngcongo, Minenhle | 9.9 | 2024.09.29 Ngcongo, Minenhle (14332370) (1869) | 0 | 86.20% | 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 | |
| 2024.09.28 | Round 8: Potgieter, Edward - Jacobs, Calvin Nicholas | 8.13 | 2024.09.28 Potgieter, Edward (14329867) (1934) | 1 | 95.80% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2024.09.27 | Round 5: Jacobs, Calvin Nicholas - Simpson, Michael | 5.11 | 2024.09.27 Simpson, Michael (14338882) (2125) | 0 | 88.00% | 1. e4 c5 2. d4 cxd4 3. c3 Nf6 | |
| 2024.09.26 | Round 4: Acho, Christian - Jacobs, Calvin Nicholas | 4.10 | 2024.09.26 Acho, Christian (14319667) (1976) | 0 | 82.20% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2024.09.26 | Round 3: Jacobs, Calvin Nicholas - Samuels, Ethan | 3.8 | 2024.09.26 Samuels, Ethan (14321068) (1979) | ½ | 87.00% | 1. e4 c5 2. d4 cxd4 3. c3 e6 | |
| 2024.09.25 | Round 2: Mnguni, Jacob Dumisani - Jacobs, Calvin Nicholas | 2.8 | 2024.09.25 Mnguni, Jacob Dumisani (14320908) (2195) | ½ | 83.30% | 1. c4 f5 2. g3 Nf6 3. Bg2 g6 | |
| 2024.09.25 | Round 1: Jacobs, Calvin Nicholas - Oatlhotse, Providence | 1.7 | 2024.09.25 Oatlhotse, Providence (11300507) (2239) | 1 | 94.20% | 1. e4 c6 2. d4 d5 3. f3 Nf6 | |
| 2024.06.22 | Round 9: Jacobs, Calvin Nicholas - Yan, Weilun | 2024.06.22 Yan, Weilun (14352591) (1676) | 1 | 88.40% | 1. b3 e5 2. Bb2 Nc6 3. e3 Nf6 | ||
| 2024.06.20 | 2024 AFRICAN YOUTH CHESS CHAMPIONSHIPS - U16 OPEN | 7 | 2024.06.20 Baruch, Liam (14322064) (1857) | 1 | 94.30% | 1. b3 d5 2. Bb2 Bf5 3. e3 Nf6 | |
| 2024.06.19 | Round 6: Mpene Thuto - Jacobs, Calvin Nicholas | 2024.06.19 Mpene Thuto (11313498) (1975) | 1 | 91.00% | 1. d4 f5 2. c4 Nf6 3. g3 g6 | ||
| 2024.06.19 | Round 5: Jacobs, Calvin Nicholas - Abdallah, Mohamed Khalil | 2024.06.19 Abdallah, Mohamed Khalil (5529506) (1724) | ½ | 96.90% | 1. e4 c5 2. d4 cxd4 3. c3 dxc3 | ||
| 2024.06.18 | Round 4: Potgieter, Edward - Jacobs, Calvin Nicholas | 2024.06.18 Potgieter, Edward (14329867) (1878) | ½ | 94.90% | 1. e4 c5 2. Nf3 e6 3. c4 Nc6 | ||
| 2024.06.15 | Round 8: Kandil, Ahmed - Jacobs, Calvin Nicholas | 2024.06.15 Kandil, Ahmed (10628401) (2069) | 0 | 89.60% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 |