Player profile

Pecka, Jan

Standard: 2059 Rapid: 1988 Blitz: 0 (last updated 2026-11-02)

FIDE ID: 23712520 (view FIDE profile)

Federation: CZE Sex: M Birth Year: 2006 Age: 20

Title: — Women's title: — Other title: — FOA title: —

Games: 34 Wins: 12 (35%) Draws: 9 (26%) Losses: 13 (38%)

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Dossier

24 of 34 games analyzed.

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Openings

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As White 9 games 6W 2D 1L

Sicilian Defense 2 games 2W 0D 0L

Modern Variations 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

Moscow Variation 1 game 1W 0D 0L

Main Line 1 game 1W 0D 0L

King's Indian Defense 1 game 0W 0D 1L

Sämisch Variation 1 game 0W 0D 1L

Double Fianchetto 1 game 0W 0D 1L

Indian Defense 1 game 1W 0D 0L

Anti-Grünfeld 1 game 1W 0D 0L

Basman-Williams Attack 1 game 1W 0D 0L

English Opening 1 game 0W 1D 0L

Symmetrical Variation 1 game 0W 1D 0L

(unspecified) 1 game 0W 1D 0L

Grünfeld Defense 1 game 1W 0D 0L

Exchange Variation 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

Caro-Kann Defense 1 game 1W 0D 0L

Two Knights Attack 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

French Defense 1 game 1W 0D 0L

Tarrasch Variation 1 game 1W 0D 0L

Closed Variation 1 game 1W 0D 0L

Nimzo-Larsen Attack 1 game 0W 1D 0L

Modern Variation 1 game 0W 1D 0L

(unspecified) 1 game 0W 1D 0L

As Black 9 games 2W 0D 7L

Ruy Lopez 3 games 0W 0D 3L

Closed 2 games 0W 0D 2L

Breyer Defense, Zaitsev Hybrid 1 game 0W 0D 1L

Breyer Defense 1 game 0W 0D 1L

Classical Defense 1 game 0W 0D 1L

Benelux Variation 1 game 0W 0D 1L

Catalan Opening 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

Nimzo-Indian Defense 1 game 0W 0D 1L

Classical Variation 1 game 0W 0D 1L

(unspecified) 1 game 0W 0D 1L

Zukertort Opening 1 game 0W 0D 1L

(unspecified) 1 game 0W 0D 1L

Scandinavian Defense 1 game 0W 0D 1L

Mieses-Kotroc Variation 1 game 0W 0D 1L

(unspecified) 1 game 0W 0D 1L

Sicilian Defense 1 game 0W 0D 1L

Keres Variation 1 game 0W 0D 1L

(unspecified) 1 game 0W 0D 1L

Italian Game 1 game 1W 0D 0L

Two Knights Defense 1 game 1W 0D 0L

Modern Bishop's Opening 1 game 1W 0D 0L

Blunders Top 4 of 102

This player's costliest moves in analyzed games. Can you find the winning move?

2025.07.02 · 25... Bxg3 (−53.2% win chance) 1-0

Pecka, Jan

Kroulik, Vaclav

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2023.08.29 · 28... g6 (−45.8% win chance) 1/2-1/2

Pecka, Jan

Sedlak, Milan

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2023.08.29 · 23... Rab8 (−45.7% win chance) 1/2-1/2

Pecka, Jan

Sedlak, Milan

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2023.08.28 · 25. c4 (−43.6% win chance) 0-1

Svadlenka, Dominik

Pecka, Jan

Engine View game

View blunders & mistakes

Games Showing all 34 games

Date	Event	Round	Opponent	Result	Accuracy %	First moves
2025.11.22	Polofinale MCR junioru 2025	9.12	2025.11.22 Zadrapova, Amalie (23710276) (1961)	0	-	1. d4 Nf6 2. c4 g6 3. Nc3 Bg7
2025.11.21	Polofinale MCR junioru 2025	8.8	2025.11.21 Davidek, Zdenek (23725001) (2236)	0	-	1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5
2025.11.20	Polofinale MCR junioru 2025	7.17	2025.11.20 Bohatyrov, Mykola (34137793) (1940)	1	90.00%	1. d4 Nf6 2. c4 g6 3. h4 Bg7
2025.11.19	Polofinale MCR junioru 2025	6.20	2025.11.19 Cech, Nicolas (23764228) (1839)	1	-	1. d4 Nf6 2. c4 e6 3. g3 Bb4+
2025.11.18	Polofinale MCR junioru 2025	5.12	2025.11.18 Rybackova, Lucie (23739207) (2016)	0	-	1. e4 e5 2. Nf3 Nc6 3. Bb5 a6
2025.11.18	Polofinale MCR junioru 2025	4.19	2025.11.18 Belaska, Vaclav (23726881) (1883)	1	-	1. e4 c5 2. Nf3 d6 3. Bc4 Nf6
2025.11.17	Polofinale MCR junioru 2025	3.29	2025.11.17 Hladky, Mikulas (23720476) (1848)	1	-	1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7
2025.11.16	Polofinale MCR junioru 2025	2.20	2025.11.16 Pusztai, Radim (23736950) (1936)	0	-	1. e4 e5 2. Nf3 Nc6 3. Bb5 a6
2025.11.16	Polofinale MCR junioru 2025	1.19	2025.11.16 Siles, Jan (23715405) (1892)	½	-	1. Nf3 c5 2. c4 g6 3. g3 Bg7
2025.07.06	Round 9: Svadlenka, Dominik - Pecka, Jan	9.6	2025.07.06 Svadlenka, Dominik (23716258) (2128)	0	74.60%	1. d4 Nf6 2. c4 e6 3. Nc3 Bb4
2025.07.05	Round 8: Pecka, Jan - Bara, Jan	8.10	2025.07.05 Bara, Jan (23716150) (1964)	1	94.20%	1. c4 Nf6 2. d4 g6 3. Nc3 d5
2025.07.04	Round 7: Horak, Martin - Pecka, Jan	7.3	2025.07.04 Horak, Martin (367095) (2324)	0	76.20%	1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7
2025.07.03	Round 6: Pecka, Jan - Langmajer, Jan	6.9	2025.07.03 Langmajer, Jan (397920) (1994)	1	92.70%	1. e4 c6 2. Nc3 d5 3. Nf3 dxe4
2025.07.02	Round 5: Kroulik, Vaclav - Pecka, Jan	5.4	2025.07.02 Kroulik, Vaclav (23725478) (2088)	0	81.00%	1. e4 d5 2. exd5 Qxd5 3. Nc3 Qe5+
2025.07.01	Round 4: Pecka, Jan - Pycha, Patrik	4.8	2025.07.01 Pycha, Patrik (344630) (2076)	1	86.20%	1. d4 e6 2. e4 d5 3. Nd2 Nf6
2025.06.29	Round 3: Pirklova, Hana - Pecka, Jan	3.9	2025.06.29 Pirklova, Hana (313777) (2048)	0	87.00%	1. e4 c5 2. Ne2 Nc6 3. c4 e6
2025.06.29	Round 2: Pecka, Jan - Andrle, Filip	2.9	2025.06.29 Andrle, Filip (23718749) (2019)	½	-	1. b3 e5 2. Bb2 Nc6 3. e3 Nf6
2025.06.28	Round 1: Petrasek, Jiri - Pecka, Jan	1.12	2025.06.28 Petrasek, Jiri (23735880) (1919)	1	-	1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6
2023.08.31	POHÁR města Říčany 2023	7.19	2023.08.31 Konvalinka, Vladislav (342955) (1705)	1	95.30%	1. d4 Nf6 2. c4 e6 3. g3 c5
2023.08.30	POHÁR města Říčany 2023	6.20	2023.08.30 Zemen, Pavel (387410) (1785)	½	93.30%	1. d4 Nf6 2. c4 g6 3. Nc3 Bg7
2023.08.29	POHÁR města Říčany 2023	5.17	2023.08.29 Sedlak, Milan (23746149) (1785)	½	64.20%	1. Nf3 Nc6 2. c4 e5 3. Nc3 Bb4
2023.08.28	POHÁR města Říčany 2023	4.14	2023.08.28 Svadlenka, Dominik (23716258) (1515)	0	77.40%	1. e4 c6 2. d4 d5 3. exd5 cxd5
2023.08.26	POHÁR města Říčany 2023	1.17	2023.08.26 Lavrincik, Pavel (320188) (1657)	½	76.10%	1. c4 b6 2. Nc3 Bb7 3. e4 e6
2023.09.02	Round 9: Oleksandra Korniichuk - Jan Pecka		2023.09.02 Oleksandra Korniichuk	1	95.50%	1. e4 Nc6 2. d4 d5 3. e5 Bf5
2023.09.01	Round 8: Jan Pecka - Jan Siles		2023.09.01 Jan Siles	1	87.20%	1. e4 c5 2. Nf3 Nc6 3. Bb5 g6
2023.07.16	Czech Open 2023 - E	6.32	2023.07.16 Postl, Petr (320579)	0	78.00%	1. e4 d6 2. d4 g6 3. c4 Bg7
2023.07.15	Czech Open 2023 - E	5.31	2023.07.15 Hlavina, Matous (386650)	½	93.50%	1. e4 e6 2. d4 d5 3. Bd3 c5
2023.07.09	Round 9: Artem Mametev - Jan Pecka		2023.07.09 Artem Mametev	0	86.50%	1. e4 c5 2. Nf3 Nc6 3. d4 cxd4
2023.07.08	Round 8: Jan Pecka - Ondrej Skypala		2023.07.08 Ondrej Skypala	½	97.20%	1. d4 Nf6 2. c4 g6 3. Nc3 Bg7
2023.07.07	Round 7: Roman Simak - Jan Pecka		2023.07.07 Roman Simak	1	96.80%	1. e4 c5 2. b3 d6 3. Bb2 Nf6
2023.07.06	Round 6: Jan Pecka - Vaclav Kroulik		2023.07.06 Vaclav Kroulik	½	81.50%	1. e3 d5 2. c4 e6 3. Nf3 Nf6
2023.07.05	Round 5: David Martirosyan - Jan Pecka		2023.07.05 David Martirosyan	½	86.40%	1. d4 Nf6 2. c4 e6 3. Nc3 Bb4
2023.07.03	Round 3: Vojtech Stary - Jan Pecka		2023.07.03 Vojtech Stary	0	88.10%	1. e4 c5 2. Nf3 Nc6 3. d4 cxd4
2023.07.02	Round 2: Jan Pecka - Rudolf Jun		2023.07.02 Rudolf Jun	0	82.70%	1. d4 Nf6 2. c4 c5 3. d5 e6