Player profile

Matthaiou, Theodoros

Standard: 1857 Rapid: 1854 Blitz: 1814 (last updated 2026-11-02)

FIDE ID: 42137438 (view FIDE profile)

Federation: GRE Sex: M Birth Year: 2011 Age: 15

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

Games: 37 Wins: 13 (35%) Draws: 4 (11%) Losses: 19 (51%) Other: 1

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Dossier

32 of 37 games analyzed.

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Openings

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As White 16 games 7W 3D 6L

? 4 games 4W 0D 0L

(unspecified) 4 games 4W 0D 0L

Ruy Lopez 3 games 1W 1D 1L

Closed 1 game 0W 1D 0L

Chigorin Defense, Panov System 1 game 0W 1D 0L

Nürnberg Variation 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

Morphy Defense 1 game 0W 0D 1L

Anderssen Variation 1 game 0W 0D 1L

Sicilian Defense 3 games 1W 1D 1L

O'Kelly Variation 1 game 0W 0D 1L

Venice System 1 game 0W 0D 1L

Moscow Variation 1 game 1W 0D 0L

Main Line 1 game 1W 0D 0L

Hyperaccelerated Dragon 1 game 0W 1D 0L

(unspecified) 1 game 0W 1D 0L

Modern Defense 1 game 0W 0D 1L

Pseudo-Austrian Attack 1 game 0W 0D 1L

(unspecified) 1 game 0W 0D 1L

St. George Defense 1 game 0W 1D 0L

(unspecified) 1 game 0W 1D 0L

Scandinavian Defense 1 game 0W 0D 1L

Gubinsky-Melts Defense 1 game 0W 0D 1L

(unspecified) 1 game 0W 0D 1L

Four Knights Game 1 game 0W 0D 1L

Scotch Variation Accepted 1 game 0W 0D 1L

(unspecified) 1 game 0W 0D 1L

French Defense 1 game 0W 0D 1L

Exchange Variation 1 game 0W 0D 1L

(unspecified) 1 game 0W 0D 1L

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

Exchange Variation 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

As Black 21 games 6W 1D 13L

Italian Game 5 games 2W 0D 3L

Classical Variation 4 games 1W 0D 3L

Giuoco Pianissimo 3 games 0W 0D 3L

Greco Gambit, Moeller-Therkatz Attack 1 game 1W 0D 0L

Giuoco Pianissimo 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

? 3 games 0W 0D 3L

(unspecified) 3 games 0W 0D 3L

King's Indian Defense 3 games 2W 0D 1L

Orthodox Variation 1 game 1W 0D 0L

Gligoric-Taimanov System 1 game 1W 0D 0L

Smyslov Variation 1 game 0W 0D 1L

(unspecified) 1 game 0W 0D 1L

Fianchetto Variation 1 game 1W 0D 0L

Uhlmann-Szabo System 1 game 1W 0D 0L

Ruy Lopez 2 games 0W 0D 2L

Morphy Defense 1 game 0W 0D 1L

Anderssen Variation 1 game 0W 0D 1L

Closed 1 game 0W 0D 1L

(unspecified) 1 game 0W 0D 1L

Sicilian Defense 2 games 0W 1D 1L

Najdorf Variation 1 game 0W 1D 0L

Lipnitsky Attack 1 game 0W 1D 0L

O'Kelly Variation 1 game 0W 0D 1L

Normal System 1 game 0W 0D 1L

English Opening 2 games 0W 0D 2L

Anglo-Indian Defense 2 games 0W 0D 2L

(unspecified) 2 games 0W 0D 2L

Four Knights Game 1 game 1W 0D 0L

Scotch Variation Accepted 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

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

Symmetrical Defense 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

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

(unspecified) 1 game 0W 0D 0L

Benoni Defense 1 game 0W 0D 1L

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

Kingside Move Order 1 game 0W 0D 1L

Blunders Top 4 of 172

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

2026.07.15 · 31. Bxe8 (−55.1% win chance) 0-1

Tsamtsouris, Efthymios

Matthaiou, Theodoros

Engine View game

2026.07.16 · 65. Rxa5 (−47.5% win chance) 1/2-1/2

Benakis, Ioannis

Matthaiou, Theodoros

Engine View game

2026.07.14 · 41. Kf4 (−47.5% win chance) 0-1

Kartsakis, Ioannis

Matthaiou, Theodoros

Engine View game

2026.07.14 · 43. Nb7 (−44.4% win chance) 0-1

Kartsakis, Ioannis

Matthaiou, Theodoros

Engine View game

View blunders & mistakes

Games Showing all 37 games

Date	Event	Round	Opponent	Result	Accuracy %	First moves
2026.09.04	Round 7: Matthaiou, Theodoros - Lemoni, Maria - Ioanna	7.7	2026.09.04 Lemoni, Maria - Ioanna (4236424) (1779)	1	86.00%	1. f4 c6 2. e4 Qc7 3. h3 g6
2026.09.04	Round 6: Karantoniou, Stylianos - Matthaiou, Theodoros	6.5	2026.09.04 Karantoniou, Stylianos (42139996) (1561)	0	72.00%	1. e3 e5 2. b3 Ba3+ 3. Bb2 Bxb2+
2026.09.04	Round 3: Matthaiou, Theodoros - Gkountis, Paraschos	3.6	2026.09.04 Gkountis, Paraschos (541002490) (1683)	1	92.00%	1. a3 b6 2. Ba2 Ng6 3. e3 Nd6
2026.09.04	Round 1: Matthaiou, Theodoros - Dimakis, Evangelos	1.10	2026.09.04 Dimakis, Evangelos (541009045) (1489)	1	65.90%	1. c4 b6 2. Nf3 Bb7 3. b3 Nf6
2026.09.03	Round 5: Matthaiou, Theodoros - Chompas, Vasileios	5.5	2026.09.03 Chompas, Vasileios (42142377) (1860)	1	70.70%	1. O-O O-O 2. d4 d5 3. c4 dxc4
2026.09.03	Round 4: Stavropoulos, Sotirios - Matthaiou, Theodoros	4.3	2026.09.03 Stavropoulos, Sotirios (42108802) (2074)	0	87.20%	1. c4 Nf6 2. e3 d5 3. Nf3 dxc4
2026.09.03	Round 2: Pournaras, Panagiotis - Matthaiou, Theodoros	2.2	2026.09.03 Pournaras, Panagiotis (25890840) (1924)	0	82.60%	1. d4 g5 2. e3 g4 3. g3 c6
2026.08.31	Round 1: Matthaiou, Theodoros - Loutragotis, Dimitrios	1.6	2026.08.31 Loutragotis, Dimitrios (4268458) (2295)	0	81.40%	1. e4 g6 2. d4 Bg7 3. Nc3 d6
2026.08.30	Round 7: Matthaiou, Theodoros - Bekker, Gary D	7.7	2026.08.30 Bekker, Gary D (3203972) (2004)	½	92.90%	1. e4 e5 2. Nf3 Nc6 3. Bb5 a6
2026.08.29	Round 6: Paouris, Nikolaos - Matthaiou, Theodoros	6.9	2026.08.29 Paouris, Nikolaos (4211839) (1902)	1	90.30%	1. c4 Nf6 2. Nf3 g6 3. Nc3 Bg7
2026.08.27	Round 4: Synetos, Dionysios - Matthaiou, Theodoros	4.9	2026.08.27 Synetos, Dionysios (25828967) (1905)	0	75.30%	1. d4 Nf6 2. c4 g6 3. Nc3 Bg7
2026.08.25	Round 2: Karathanasis, Vlasis - Matthaiou, Theodoros	2.5	2026.08.25 Karathanasis, Vlasis (4243030) (2024)	0	86.70%	1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5
2026.07.16	Round 4: Vaggos, Konstantinos - Matthaiou, Theodoros	4.6	2026.07.16 Vaggos, Konstantinos (25849697) (1717)	0	78.20%	1. e4 e5 2. Nf3 Nc6 3. Bb5 a6
2026.07.16	Round 3: Matthaiou, Theodoros - Benakis, Ioannis	3.3	2026.07.16 Benakis, Ioannis (25858360) (1942)	½	75.80%	1. e4 a6 2. d4 d6 3. Nc3 g6
2026.07.16	Round 2: Psarianou, Eleni - Matthaiou, Theodoros	2.9	2026.07.16 Psarianou, Eleni (25882392) (1753)	1	80.60%	1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7
2026.07.15	Round 6: Matthaiou, Theodoros - Tsamtsouris, Efthymios	6.3	2026.07.15 Tsamtsouris, Efthymios (25889095) (2027)	0	72.50%	1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6
2026.07.15	Round 5: Matthaiou, Theodoros - Tzoumis, Petros	5.9	2026.07.15 Tzoumis, Petros (42198321) (1563)	1	83.30%	1. e4 e5 2. Nf3 Nc6 3. Bb5 f6
2026.07.14	Round 7: Chatzikyriakos, Christos - Matthaiou, Theodoros	7.5	2026.07.14 Chatzikyriakos, Christos (42197830) (1481)	1	76.10%	1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5
2026.07.14	Round 6: Dallas, Iasonas - Matthaiou, Theodoros	6.5	2026.07.14 Dallas, Iasonas (25866311) (1633)	0	88.20%	1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5
2026.07.14	Round 5: Matthaiou, Theodoros - Mantazis, Georgios Rafail	5.2	2026.07.14 Mantazis, Georgios Rafail (42122570) (2056)	0	83.10%	1. e4 e5 2. Nf3 Nc6 3. Bb5 a6
2026.07.14	Round 4: Matthaiou, Theodoros - Kartsakis, Ioannis	4.2	2026.07.14 Kartsakis, Ioannis (42124034) (1689)	0	74.90%	1. e4 c5 2. Nf3 a6 3. c3 d5
2026.07.14	Round 3: Efientzi, Rafailia - Matthaiou, Theodoros	3.3	2026.07.14 Efientzi, Rafailia (42157870) (1727)	1	96.30%	1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6
2026.07.14	Round 2: Matthaiou, Theodoros - Spiliotopoulos, Spyridon	2.2	2026.07.14 Spiliotopoulos, Spyridon (42100771) (1785)	0	81.40%	1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6
2026.07.14	Round 1: Tzoumis, Petros - Matthaiou, Theodoros	1.4	2026.07.14 Tzoumis, Petros (42198321) (1563)	1	90.70%	1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5
2026.04.20	Round 9: Patrinos, Ektor - Matthaiou, Theodoros	9.18	2026.04.20 Patrinos, Ektor (42179815) (1786)	½	97.60%	1. e4 c5 2. Nf3 d6 3. d4 cxd4
2026.04.20	Round 8: Matthaiou, Theodoros - Gkikas, Nektarios	8.20	2026.04.20 Gkikas, Nektarios (42128650) (1608)	1	-	1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7
2026.04.18	Round 6: Ntrekis, Minas - Matthaiou, Theodoros	6.20	2026.04.18 Ntrekis, Minas (42174503) (1486)	0	-	1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5
2026.04.17	Round 5: Matthaiou, Theodoros - Sellis, Charalampos	5.20	2026.04.17 Sellis, Charalampos (42181259) (1684)	½	81.70%	1. e4 c5 2. Nf3 g6 3. c3 d6
2026.04.17	Round 4: Asvestopoulos, Sergios - Matthaiou, Theodoros	4.16	2026.04.17 Asvestopoulos, Sergios (42160758) (1695)	0	-	1. e4 e5 2. Nf3 Nc6 3. Bb5 a6
2026.04.15	Round 3: Matthaiou, Theodoros - Giakamozis, Apostolos	3.17	2026.04.15 Giakamozis, Apostolos (42133483) (1579)	0	88.80%	1. e4 e6 2. d4 d5 3. exd5 exd5
2026.04.15	Round 2: Theodoridis, Charalampos - Matthaiou, Theodoros	2.6	2026.04.15 Theodoridis, Charalampos (25874675) (2074)	0	-	1. c4 Nf6 2. g3 g6 3. Bg2 Bg7
2026.03.23	3rd International Open Chess Tournament of Katerini Group B	7.2	2026.03.23 Bahar-Mosse, Iakov (4251512) (1828)	1	94.60%	1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7
2025.04.25	Round 5: Diamantidis, Stamatios - Matthaiou, Theodoros	5.4	2025.04.25 Diamantidis, Stamatios (42141931) (1611)	*	-	1. e4 c6 2. Nc3 d5 3. exd5 cxd5
2025.04.24	Round 4: Matthaiou, Theodoros - Galerakis, Panagiotis Spyridon	4.5	2025.04.24 Galerakis, Panagiotis Spyridon (42174090) (1623)	1	83.50%	1. e4 c6 2. d4 d5 3. exd5 cxd5
2025.04.23	Round 2: Latifis, Panagiotis - Matthaiou, Theodoros	2.2	2025.04.23 Latifis, Panagiotis (25896946) (1671)	0	87.40%	1. d4 Nf6 2. Nf3 c5 3. d5 d6
2024.06.26	Round 7: Nikolakopoulos, Leonidas Marios - Matthaiou, Theodoros	7.16	2024.06.26 Nikolakopoulos, Leonidas Marios (42104246) (1716)	0	84.40%	1. e4 c5 2. Nf3 a6 3. d4 cxd4
2024.05.07	Round 1: Lafkidis, Apostolos - Matthaiou, Theodoros		2024.05.07 Lafkidis, Apostolos (25869930) (1924)	0	88.00%	1. c4 Nf6 2. g3 g6 3. Bg2 Bg7