Player profile
Sieber, Bert
Dossier
51 of 54 games analyzed.
Accuracy: 89.3%
Opened d4: 19/19
Castled kingside: 38Same-side castling: 31Did not castle: 3Opposite-side castling: 3Castled queenside: 1
Played on the queenside: 17Played on the kingside: 15Fianchettoed queenside: 10Played in the center: 9Fianchettoed kingside: 7
Space advantage: 29Initiated exchanges: 28Backward pawn: 28Kept the bishop pair: 27Sacrificed material: 27Active pieces: 25Isolated pawn: 22Missed tactics: 13Avoided exchanges: 8Played gambits: 2
Openings
Click "+" to add that group to the games list below. Multiple groups can be added at once.
As White 22 games 11W 2D 9L
Nimzo-Indian Defense 9 games 4W 0D 5L
Normal Variation 5 games 2W 0D 3L
Classical Defense
3 games
0W
0D
3L
(unspecified)
2 games
2W
0D
0L
Rubinstein System 2 games 1W 0D 1L
Rubinstein Variation
1 game
1W
0D
0L
(unspecified)
1 game
0W
0D
1L
St. Petersburg Variation 2 games 1W 0D 1L
Fischer Variation
1 game
0W
0D
1L
(unspecified)
1 game
1W
0D
0L
King's Indian Defense 3 games 1W 0D 2L
Orthodox Variation 2 games 0W 0D 2L
(unspecified)
1 game
0W
0D
1L
Aronin-Taimanov Defense
1 game
0W
0D
1L
Normal Variation 1 game 1W 0D 0L
Rare Defenses
1 game
1W
0D
0L
Queen's Gambit Declined 3 games 3W 0D 0L
Exchange Variation 2 games 2W 0D 0L
Positional Variation
2 games
2W
0D
0L
Austrian Defense 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Grünfeld Defense 2 games 1W 1D 0L
Russian Variation 2 games 1W 1D 0L
Hungarian Variation
1 game
0W
1D
0L
Prins Variation
1 game
1W
0D
0L
English Defense 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Dutch Defense 1 game 0W 0D 1L
Hopton Attack 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Queen's Gambit Accepted 1 game 1W 0D 0L
Central Variation 1 game 1W 0D 0L
Alekhine System
1 game
1W
0D
0L
Slav Defense 1 game 0W 1D 0L
Modern Line 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Queen's Indian Accelerated 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
As Black 23 games 10W 4D 9L
Sicilian Defense 14 games 7W 3D 4L
Kan Variation 7 games 3W 1D 3L
Polugaevsky Variation
5 games
1W
1D
3L
Wing Attack, Fianchetto Variation
1 game
1W
0D
0L
Wing Attack
1 game
1W
0D
0L
Accelerated Dragon 3 games 2W 1D 0L
Maróczy Bind, Gurgenidze Variation
1 game
1W
0D
0L
Modern Variation
1 game
0W
1D
0L
Modern Bc4 Variation
1 game
1W
0D
0L
McDonnell Attack 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Closed 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Kramnik Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Old Sicilian 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Queen's Gambit Declined 6 games 2W 1D 3L
(unspecified) 3 games 1W 0D 2L
(unspecified)
3 games
1W
0D
2L
Queen's Knight Variation 2 games 1W 0D 1L
(unspecified)
2 games
1W
0D
1L
Exchange Variation 1 game 0W 1D 0L
Positional Variation
1 game
0W
1D
0L
Zukertort Opening 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
English Opening 1 game 0W 0D 1L
Anglo-Indian Defense 1 game 0W 0D 1L
King's Knight Variation
1 game
0W
0D
1L
Richter-Veresov Attack 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Blunders Top 4 of 252
This player's costliest moves in analyzed games. Can you find the winning move?
Games Showing all 54 games
| Date | Event | Round | Color | Opponent | Result | Accuracy % | First moves |
|---|---|---|---|---|---|---|---|
| 2026.08.09 | Round 7: Jacobi, Felix-Hagen - Sieber, Bert | 7.5 | 2026.08.09 Jacobi, Felix-Hagen (1270475) (2056) | 1 | 94.80% | 1. e4 c5 2. f4 a6 3. Nf3 b5 | |
| 2026.08.09 | Round 6: Sieber, Bert - Tonndorf, Matthias | 6.2 | 2026.08.09 Tonndorf, Matthias (4682033) (2229) | 0 | 86.80% | 1. d4 e6 2. c4 b6 3. Nc3 Bb7 | |
| 2026.08.08 | Round 5: de Voogt, Juergen - Sieber, Bert | 5.4 | 2026.08.08 de Voogt, Juergen (4677064) (2254) | 1 | 88.10% | 1. e4 c5 2. Nc3 a6 3. g3 Nc6 | |
| 2026.08.08 | Round 4: Sieber, Bert - Laubsch, Bernd | 4.4 | 2026.08.08 Laubsch, Bernd (4663314) (2156) | ½ | 88.40% | 1. d4 Nf6 2. c4 g6 3. Nc3 d5 | |
| 2026.08.07 | Round 3: Tietje, Daniel - Sieber, Bert | 3.5 | 2026.08.07 Tietje, Daniel (533055637) (1943) | 1 | 95.80% | 1. Nf3 d5 2. e3 Nf6 3. c4 e6 | |
| 2026.08.07 | Round 2: Sieber, Bert - Juergenpott, Maximilian | 2.14 | 2026.08.07 Juergenpott, Maximilian (16297733) (1867) | 1 | 93.30% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2026.08.06 | Round 1: Nizamova, Rita - Sieber, Bert | 1.9 | 2026.08.06 Nizamova, Rita (16221940) (1895) | ½ | 83.80% | 1. e4 c5 2. Nf3 e6 3. c4 Nc6 | |
| 2026.04.02 | Grenke Chess Festival 2026 Open | 1.9 | 2026.04.02 Horvath, Dominik (1642561) (2541) | 0 | 86.20% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2026.01.05 | Runde 7: Scheffner, Jarno - Sieber, Bert | 7.11 | 2026.01.05 Scheffner, Jarno (12981176) (2010) | 0 | 88.40% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2026.01.04 | Runde 6: Sieber, Bert - Kieselbach, Marvin | 6.12 | 2026.01.04 Kieselbach, Marvin (16235770) (1936) | 1 | 89.10% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2026.01.04 | Runde 5: Riemay, David - Sieber, Bert | 5.11 | 2026.01.04 Riemay, David (4682076) (2250) | 0 | 85.40% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2026.01.03 | Runde 4: Lau, Theodor - Sieber, Bert | 4.12 | 2026.01.03 Lau, Theodor (12946524) (1836) | 1 | 85.90% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2026.01.03 | Runde 3: Sieber, Bert - Holtwessels, Jan | 3.10 | 2026.01.03 Holtwessels, Jan (34639560) (2062) | 0 | 87.30% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2026.01.02 | Runde 2: Hoellman, Ludger - Sieber, Bert | 2.10 | 2026.01.02 Hoellman, Ludger (4606507) (1996) | 0 | 82.20% | 1. d4 d5 2. c4 e6 3. Nf3 h6 | |
| 2026.01.02 | Runde 1: Sieber, Bert - Hampel, Felix | 1.3 | 2026.01.02 Hampel, Felix (24668125) (2333) | 0 | 85.60% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2025.10.05 | Deutsche Ländermeisterschaft 2025 | 7 | 2025.10.05 Mader, Fabian (16265866) (2153) | 1 | 90.10% | 1. d4 Nf6 2. c4 g6 3. Nc3 d5 | |
| 2025.10.04 | Deutsche Ländermeisterschaft 2025 | 6 | 2025.10.04 Guo, Philipp Ziming (16245199) (2184) | ½ | 84.20% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2025.10.03 | Deutsche Ländermeisterschaft 2025 | 5 | 2025.10.03 Mester, Philipp (34624902) (2246) | 0 | 85.70% | 1. d4 f5 2. Bg5 g6 3. Nc3 Bg7 | |
| 2025.10.03 | Deutsche Ländermeisterschaft 2025 | 4 | 2025.10.03 Belin, Anton (34610952) (2124) | 0 | 92.70% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2025.10.02 | Deutsche Ländermeisterschaft 2025 | 3 | 2025.10.02 Vortmeier, Jan (16261321) (2190) | 1 | 84.30% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2025.10.01 | Deutsche Ländermeisterschaft 2025 | 2 | 2025.10.01 Grossmann, Piet (16234359) (2077) | 1 | 94.50% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2025.10.01 | Deutsche Ländermeisterschaft 2025 | 1 | 2025.10.01 Semling, Julius (16290160) (2248) | 0 | - | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.06.14 | DEM U18 2025 | 9 | 2025.06.14 Petzold, Johannes Julius (16289455) (1986) | 1 | 92.70% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2025.06.13 | DEM U18 2025 | 8 | 2025.06.13 Mueller, Maximilian (16243552) (2018) | 0 | - | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.06.12 | DEM U18 2025 | 7 | 2025.06.12 Stork, Christopher (16215400) (2132) | 0 | 82.90% | 1. d4 d5 2. c4 e6 3. Nf3 a6 | |
| 2025.06.11 | DEM U18 2025 | 6 | 2025.06.11 Deschler, Arne (16274415) (2055) | 1 | - | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 | |
| 2025.06.11 | DEM U18 2025 | 5 | 2025.06.11 Eitel, Luc (16299728) (1935) | 1 | 92.00% | 1. d4 d5 2. c4 dxc4 3. e4 Nf6 | |
| 2025.06.10 | DEM U18 2025 | 4 | 2025.06.10 Cilo, Selimhan (16246756) (2164) | 1 | 97.20% | 1. d4 d5 2. c4 e6 3. Nf3 a6 | |
| 2025.06.09 | DEM U18 2025 | 3 | 2025.06.09 Lippitz, Jaden (34608893) (1828) | 0 | 88.80% | 1. c4 Nf6 2. Nf3 e6 3. Nc3 d5 | |
| 2025.06.08 | DEM U18 2025 | 2 | 2025.06.08 Rempe, Jonas (16202406) (2135) | 0 | 88.80% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.06.08 | DEM U18 2025 | 1 | 2025.06.08 Strehse, Nelson (16228898) (2168) | 0 | 86.70% | 1. d4 d5 2. c4 e6 3. Nc3 h6 | |
| 2025.05.25 | Round 5: Sieber, Bert - Greiving, Felix | 5.21 | 2025.05.25 Greiving, Felix (12967548) (1947) | ½ | 86.50% | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | |
| 2025.05.24 | Round 3: Daemmig, Matthias, Dr. - Sieber, Bert | 3.25 | 2025.05.24 Daemmig, Matthias, Dr. (12901539) (2046) | 0 | 87.00% | 1. d4 d5 2. Nc3 Nf6 3. Bg5 a6 | |
| 2025.05.24 | Round 2: Sieber, Bert - Mimkes, Antal | 2.21 | 2025.05.24 Mimkes, Antal (16265963) (2062) | 1 | 96.30% | 1. d4 Nf6 2. c4 b6 3. Nc3 Bb7 | |
| 2025.05.23 | Round 1: Kroeze, Frank - Sieber, Bert | 1.5 | 2025.05.23 Kroeze, Frank (1002880) (2375) | 0 | 83.00% | 1. e4 c5 2. Nf3 Nc6 3. g3 g6 | |
| 2025.04.17 | Runde 8: Beckmann, Jonathan - Sieber, Bert | 8.2 | 2025.04.17 Beckmann, Jonathan (34672591) (1832) | 1 | 96.10% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | |
| 2025.04.16 | Runde 7: Sieber, Bert - Wilmink, Anna | 7.2 | 2025.04.16 Wilmink, Anna (16273680) (2025) | 1 | 96.10% | 1. d4 d5 2. c4 c5 3. cxd5 Qxd5 | |
| 2025.04.16 | Runde 6: Sieber, Bert - Freise, Linus | 6.3 | 2025.04.16 Freise, Linus (16298870) (1797) | 1 | 86.70% | 1. d4 e6 2. c4 b6 3. Nc3 Bb4 | |
| 2025.04.15 | Runde 5: Kieselbach, Marvin - Sieber, Bert | 5.2 | 2025.04.15 Kieselbach, Marvin (16235770) (2000) | ½ | 87.30% | 1. e4 c5 2. Nf3 Nc6 3. Nc3 g6 | |
| 2025.04.13 | Runde 2: Sieber, Bert - Burnus, Finn Crispin | 2.4 | 2025.04.13 Burnus, Finn Crispin (34641211) (1876) | 1 | 91.60% | 1. d4 Nf6 2. c4 e6 3. Nc3 d5 | |
| 2025.04.12 | Runde 1: Ivan Jovic - Sieber, Bert | 1.4 | 2025.04.12 Ivan Jovic | 1 | 98.40% | 1. d4 d5 2. c4 e6 3. Nc3 h6 | |
| 2025.04.11 | Runde 9: Sieber, Bert - Ponyrko, Matviy | 9.1 | 2025.04.11 Ponyrko, Matviy (14199050) (1662) | 1 | 94.30% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.04.11 | Runde 4: Sieber, Bert - Kieselbach, Jannik | 4.1 | 2025.04.11 Kieselbach, Jannik (16246403) (2068) | 0 | 79.80% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.04.11 | Runde 3: Zweigait, Leon - Sieber, Bert | 3.1 | 2025.04.11 Zweigait, Leon (16201388) (1913) | 1 | 91.50% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | |
| 2024.11.23 | Round 3: Mog, Martin - Sieber, Bert | 3.14 | 2024.11.23 Mog, Martin (12937355) (2095) | ½ | 93.50% | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 | |
| Round 7: Torosyan, Bagrat - Sieber, Bert | 7.5 | Torosyan, Bagrat (16258134) (2091) | 1 | 92.10% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | ||
| Round 6: Sieber, Bert - Steffens, Olaf | 6.2 | Steffens, Olaf (4630564) (2148) | 0 | 87.40% | 1. d4 e6 2. c4 b6 3. Nc3 Bb7 | ||
| Round 5: Schulz, Jannis - Sieber, Bert | 5.1 | Schulz, Jannis (16224710) (2031) | ½ | 96.30% | 1. d4 d5 2. Bf4 e6 3. e3 Nf6 | ||
| Round 4: Sieber, Bert - Huseynov, Ahad | 4.1 | Huseynov, Ahad (16225880) (2146) | 1 | 86.30% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | ||
| Round 3: Krueger, Moritz - Sieber, Bert | 3.7 | Krueger, Moritz (34608923) (1797) | 1 | 94.60% | 1. d4 d5 2. Nf3 e6 3. g3 Nf6 | ||
| Round 2: Sieber, Bert - Schubert, Matthias | 2.11 | Schubert, Matthias (24661139) (1879) | 1 | 85.30% | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 | ||
| Round 1: Buergener, Richard - Sieber, Bert | 1.15 | Buergener, Richard (16268768) (1903) | 1 | 94.80% | 1. e4 c5 2. c3 d5 3. exd5 Nf6 | ||
| Round 7: Sieber, Bert - Reichmann, Felix | 7.3 | Reichmann, Felix (16238290) (2167) | 1 | 92.90% | 1. d4 Nf6 2. c4 g6 3. Nc3 d5 | ||
| Round 6: Huber, Benedikt - Sieber, Bert | 6.5 | Huber, Benedikt (12923583) (2269) | 1 | 89.60% | 1. d4 d5 2. Nf3 e6 3. e3 Nf6 |