Player profile

Boersma, Jan

Standard: 2115 Rapid: 0 Blitz: 0 (last updated 2026-11-02)

FIDE ID: 1003267 (view FIDE profile)

Federation: NED Sex: M Birth Year: 1958 Age: 68

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

Games: 33 Wins: 9 (27%) Draws: 13 (39%) Losses: 11 (33%)

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Dossier

31 of 33 games analyzed.

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Openings

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As White 9 games 5W 3D 1L

Sicilian Defense 6 games 3W 3D 0L

Closed 6 games 3W 3D 0L

(unspecified) 3 games 1W 2D 0L

Traditional 3 games 2W 1D 0L

Caro-Kann Defense 2 games 2W 0D 0L

Accelerated Panov Attack 2 games 2W 0D 0L

Modern Variation 2 games 2W 0D 0L

Four Knights Game 1 game 0W 0D 1L

Spanish Variation 1 game 0W 0D 1L

Rubinstein Variation, Henneberger Variation 1 game 0W 0D 1L

As Black 8 games 4W 2D 2L

Benoni Defense 3 games 1W 1D 1L

Hromádka System 2 games 1W 0D 1L

(unspecified) 2 games 1W 0D 1L

(unspecified) 1 game 0W 1D 0L

English Opening 1 game 1W 0D 0L

Great Snake Variation 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

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

Orthodox Variation 1 game 0W 1D 0L

(unspecified) 1 game 0W 1D 0L

Sicilian Defense 1 game 1W 0D 0L

Hyperaccelerated Dragon 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

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

Classical Variation 1 game 0W 0D 1L

(unspecified) 1 game 0W 0D 1L

Zukertort Opening 1 game 1W 0D 0L

Sicilian Invitation 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

Blunders Top 4 of 105

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

2023.07.25 · 24. Rac1 (−53.2% win chance) 0-1

Guus Bollen

Jan Boersma

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2023.07.25 · 23. Bg5 (−38.1% win chance) 0-1

Guus Bollen

Jan Boersma

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2023.07.25 · 26. Be2 (−29.9% win chance) 0-1

Guus Bollen

Jan Boersma

Engine View game

2025.07.24 · 34. Rb8 (−23.3% win chance) 0-1

Ghilon Etienne

Boersma, Jan

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Games Showing all 33 games

Date	Event	Round	Opponent	Result	Accuracy %	First moves
2026.07.24	Round 4: Smit, Emeline - Boersma, Jan	4.2	2026.07.24 Smit, Emeline (1042262) (1974)	1	94.30%	1. c4 g6 2. h4 Nf6 3. e3 Bg7
2026.07.23	Round 3: Boersma, Jan - Kompaan, Rick	3.5	2026.07.23 Kompaan, Rick (1049569) (1939)	1	92.30%	1. e4 c5 2. Nc3 d6 3. f4 g6
2026.07.22	Round 2: Seip, Rien - Boersma, Jan	2.3	2026.07.22 Seip, Rien (1013815) (1932)	½	89.00%	1. d4 Nf6 2. c4 g6 3. Nc3 Bg7
2026.07.21	Round 1: Boersma, Jan - Ngangbam, Chingthang	1.4	2026.07.21 Ngangbam, Chingthang (1086510) (1910)	1	94.00%	1. e4 c5 2. Nc3 Nc6 3. Bb5 Nd4
2025.12.29	Round 5: Boersma, Jan - Van Putten, Henk	5.4	2025.12.29 Van Putten, Henk (1028308) (2076)	½	97.20%	1. e4 c5 2. Nc3 d6 3. f4 Nc6
2025.12.27	Round 3: Vroombout, Enrico - Boersma, Jan	3.2	2025.12.27 Vroombout, Enrico (1008730) (2056)	1	98.20%	1. e4 c5 2. Nf3 g6 3. d4 cxd4
2025.12.26	Round 2: Boersma, Jan - Sijpkens, Michiel	2.4	2025.12.26 Sijpkens, Michiel (1013246) (2062)	1	97.20%	1. e4 c6 2. c4 d5 3. cxd5 cxd5
2025.12.03	Round 4: Ten Dam, Bram - Boersma, Jan	4.1	2025.12.03 Ten Dam, Bram (40104877) (2166)	0	89.00%	1. b3 d5 2. Bb2 Nf6 3. e3 c6
2025.07.30	Round 9: Boersma, Jan - Guillaumond, Matthieu	9.7	2025.07.30 Guillaumond, Matthieu (1097091) (1992)	½	88.70%	1. e4 c5 2. Nc3 Nc6 3. Bb5 Nd4
2025.07.29	Round 8: Mika Kleibeuker - Boersma, Jan	8.4	2025.07.29 Mika Kleibeuker (8577228)	0	89.60%	1. d4 Nf6 2. c4 c5 3. d5 d6
2025.07.28	Round 7: Boersma, Jan - Hylarides, Charlie Ronald	7.7	2025.07.28 Hylarides, Charlie Ronald (40105822) (1819)	1	84.30%	1. e4 c6 2. c4 d5 3. cxd5 cxd5
2025.07.27	Round 6: Ebels, Theo - Boersma, Jan	6.5	2025.07.27 Ebels, Theo (1019660) (1942)	½	93.20%	1. d4 Nf6 2. c4 c5 3. e3 g6
2025.07.26	Round 5: Boersma, Jan - Haans, Kaz	5.3	2025.07.26 Haans, Kaz (1058231) (1970)	½	92.10%	1. e4 c5 2. Nc3 e6 3. Nf3 Nc6
2025.07.25	Round 4: Asefi, Zaheeruddeen - Boersma, Jan	4.6	2025.07.25 Asefi, Zaheeruddeen (11700025) (1956)	1	93.40%	1. d4 Nf6 2. c4 c5 3. d5 d6
2025.07.24	Round 3: Boersma, Jan - Ghilon Etienne	3.3	2025.07.24 Ghilon Etienne (8852118)	0	85.90%	1. e4 e5 2. Nc3 Nc6 3. Nf3 Nf6
2025.07.23	Round 2: Heijmans, Stan - Boersma, Jan	2.3	2025.07.23 Heijmans, Stan (1042505) (1951)	1	-	1. Nf3 c5 2. b3 b6 3. Bb2 Bb7
2025.07.22	Round 1: Boersma, Jan - Van Ree, Thailo	1.3	2025.07.22 Van Ree, Thailo (40102181) (1925)	1	-	1. e4 c5 2. Nc3 Nc6 3. Bb5 Nd4
2023.10.27	Hoogeveen Open 2023	8.16	2023.10.27 Fehr, Axel, Dr. (4675185) (2011)	0	94.70%	1. Nf3 g6 2. c4 Bg7 3. g3 c5
2023.10.26	Hoogeveen Open 2023	7.16	2023.10.26 Zecha, Oscar (1073826) (1838)	0	86.70%	1. e4 c5 2. Nf3 g6 3. d4 cxd4
2023.10.25	Hoogeveen Open 2023	6.15	2023.10.25 Boeren, Jurriaan (1067478) (2120)	½	92.20%	1. e4 e6 2. d4 d5 3. Nc3 Nf6
2023.10.24	Hoogeveen Open 2023	4.16	2023.10.24 Vogel, Jaap (1000764) (2106)	½	92.80%	1. d4 Nf6 2. Nf3 g6 3. g3 Bg7
2023.10.23	Hoogeveen Open 2023	3.14	2023.10.23 Kett, Tim (1801210) (2130)	0	82.90%	1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6
2023.10.22	Hoogeveen Open 2023	2.8	2023.10.22 De Winter, Arthur (1069020) (2397)	0	82.20%	1. e4 c5 2. Nf3 g6 3. c3 d5
2023.10.21	Hoogeveen Open 2023	1.14	2023.10.21 Van Kooten, Luuk (1006533) (2255)	½	96.10%	1. e4 c5 2. Nc3 Nc6 3. Bb5 g6
2023.08.03	Round 9: Jan Boersma - John Raymond Markus		2023.08.03 John Raymond Markus	½	79.30%	1. Nc3 g6 2. e4 d6 3. f4 Bg7
2023.08.02	Round 8: Sascha Kurt - Jan Boersma		2023.08.02 Sascha Kurt	0	86.30%	1. e4 c5 2. Nf3 g6 3. d4 cxd4
2023.08.01	Round 7: Jan Boersma - Yu A. Hu		2023.08.01 Yu A. Hu	0	88.50%	1. e4 c5 2. Nc3 d6 3. f4 Nc6
2023.07.31	Round 6: Noah Ritzerveld - Jan Boersma		2023.07.31 Noah Ritzerveld	½	86.70%	1. e4 c5 2. Nf3 g6 3. d4 cxd4
2023.07.29	Round 5: Jan Boersma - Tom Bus		2023.07.29 Tom Bus	½	92.20%	1. e4 c5 2. Nc3 a6 3. g3 b5
2023.07.28	Round 4: William Shakhverdian - Jan Boersma		2023.07.28 William Shakhverdian	½	88.00%	1. d4 Nf6 2. c4 g6 3. Nc3 Bg7
2023.07.27	Round 3: Jan Boersma - Tom De Jong		2023.07.27 Tom De Jong	0	93.70%	1. e4 c6 2. c4 d5 3. cxd5 cxd5
2023.07.26	Round 2: Thomas Kools - Jan Boersma		2023.07.26 Thomas Kools	½	94.20%	1. e4 c5 2. Nc3 Nc6 3. g3 g6
2023.07.25	Round 1: Jan Boersma - Guus Bollen		2023.07.25 Guus Bollen	0	66.20%	1. e4 c6 2. c4 d5 3. exd5 cxd5