Player profile
Biernacki, Mark
Dossier
14 of 14 games analyzed.
Accuracy: 86.2%
Opened c4: 3/3
Castled kingside: 8Opposite-side castling: 4Same-side castling: 4Castled queenside: 1Did not castle: 1
Fianchettoed kingside: 6Played on the queenside: 5Fianchettoed queenside: 4Played on the kingside: 3Played in the center: 2
Sacrificed material: 9Initiated exchanges: 8Isolated pawn: 8Kept the bishop pair: 8Backward pawn: 7Active pieces: 6Missed tactics: 4Space advantage: 3Avoided exchanges: 1
Openings
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As White 3 games 2W 0D 1L
English Opening 1 game 1W 0D 0L
King's English Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Queen's Gambit Declined 1 game 0W 0D 1L
Barmen Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
King's Indian Defense 1 game 1W 0D 0L
Fianchetto Variation 1 game 1W 0D 0L
Kavalek Defense
1 game
1W
0D
0L
As Black 7 games 2W 0D 5L
Sicilian Defense 2 games 0W 0D 2L
Kan Variation 2 games 0W 0D 2L
Polugaevsky Variation
1 game
0W
0D
1L
Wing Attack
1 game
0W
0D
1L
King's Indian Defense 2 games 1W 0D 1L
Normal Variation 1 game 1W 0D 0L
Standard Development
1 game
1W
0D
0L
Fianchetto Variation 1 game 0W 0D 1L
Panno Variation
1 game
0W
0D
1L
English Opening 1 game 1W 0D 0L
Anglo-Indian Defense 1 game 1W 0D 0L
King's Indian Formation
1 game
1W
0D
0L
Indian Defense 1 game 0W 0D 1L
Accelerated London System 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Modern Defense 1 game 0W 0D 1L
Two Knights Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Blunders Top 4 of 83
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 |
|---|---|---|---|---|---|---|---|
| 2026.08.14 | Open Letní Praha 2026 | 8.22 | 2026.08.14 Simakhin, Martin (23788178) (2058) | 0 | 76.20% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2026.08.13 | Open Letní Praha 2026 | 7.9 | 2026.08.13 Gijsen, William (1053361) (2163) | 0 | 91.50% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2026.08.12 | Open Letní Praha 2026 | 6.13 | 2026.08.12 Pogorelskiy, Boris (34365478) (2135) | 1 | 93.00% | 1. c4 e5 2. Nc3 d6 3. Nf3 f5 | |
| 2026.08.09 | Open Letní Praha 2026 | 3.8 | 2026.08.09 Schletter, Felix (16240529) (2137) | 0 | 84.50% | 1. c4 e6 2. Nc3 d5 3. d4 Nf6 | |
| 2026.08.08 | Open Letní Praha 2026 | 2.19 | 2026.08.08 Rotolante, Luca (2819959) (2089) | 1 | 95.50% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2026.08.07 | Open Letní Praha 2026 | 1.3 | 2026.08.07 Jun, Rudolf (376612) (2345) | 1 | 91.00% | 1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 | |
| 2026.07.04 | Round 11: Sagar, Shah - Biernacki, Mark | 11.13 | 2026.07.04 Sagar, Shah (5022509) (2307) | 1 | 88.60% | 1. Nf3 Nf6 2. c4 g6 3. b3 Bg7 | |
| 2026.07.04 | Round 5: Rosen, Eric - Biernacki, Mark | 5.14 | 2026.07.04 Rosen, Eric (2032562) (2327) | 0 | 78.60% | 1. d4 Nf6 2. Bf4 g6 3. Nc3 d6 | |
| 2026.07.03 | Round 5: Bartholomew, John - Biernacki, Mark | 5.12 | 2026.07.03 Bartholomew, John (2019353) (2443) | 0 | 88.40% | 1. Nf3 g6 2. d4 Bg7 3. e4 d6 | |
| 2026.07.03 | Round 1: Rensch, Daniel - Biernacki, Mark | 1.20 | 2026.07.03 Rensch, Daniel (2017202) (2399) | 0 | 74.60% | 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 | |
| 2023.03.12 | Round 5: Darcy Lima - Mark Biernacki | 2023.03.12 Darcy Lima | 0 | 82.70% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | ||
| 2023.03.11 | Round 2: Dina Belenkaya - Mark Biernacki | 2023.03.11 Dina Belenkaya | 0 | 87.80% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | ||
| 2023.01.16 | Round 6: Richard Francisco - Mark Biernacki | 2023.01.16 Richard Francisco | ½ | 87.70% | 1. c4 g6 2. g3 Bg7 3. Bg2 Nf6 | ||
| 2023.01.14 | Round 1: Mark Biernacki - Kostya Kavutskiy | 2023.01.14 Kostya Kavutskiy | 0 | 89.90% | 1. c4 g6 2. Nc3 Bg7 3. Nf3 Nf6 |