Player profile

Sierra Romero, Ronald Esteban

Standard: 1593 Rapid: 1602 Blitz: 1615 (last updated 2026-10-02)

FIDE ID: 144458371 (view FIDE profile)

Federation: COL Sex: M Birth Year: 2014 Age: 12

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

Games: 16 Wins: 5 (31%) Draws: 4 (25%) Losses: 5 (31%) Other: 2

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Dossier

13 of 16 games analyzed.

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Openings

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As White 8 games 4W 1D 1L

Sicilian Defense 3 games 1W 1D 0L

Kalashnikov Variation 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

Löwenthal Variation 1 game 0W 0D 0L

(unspecified) 1 game 0W 0D 0L

Hyperaccelerated Dragon 1 game 0W 1D 0L

(unspecified) 1 game 0W 1D 0L

Scotch Game 3 games 2W 0D 0L

(unspecified) 2 games 1W 0D 0L

Schmidt Variation 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

French Defense 1 game 0W 0D 1L

Rubinstein Variation 1 game 0W 0D 1L

Blackburne Defense 1 game 0W 0D 1L

Petrov's Defense 1 game 1W 0D 0L

Modern Attack 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

As Black 8 games 1W 3D 4L

Sicilian Defense 5 games 0W 3D 2L

Lasker-Pelikan Variation 3 games 0W 3D 0L

Retreat Variation 2 games 0W 2D 0L

Schlechter Variation 1 game 0W 1D 0L

Alapin Variation 1 game 0W 0D 1L

(unspecified) 1 game 0W 0D 1L

Old Sicilian 1 game 0W 0D 1L

(unspecified) 1 game 0W 0D 1L

Indian Defense 2 games 1W 0D 1L

Accelerated London System 1 game 0W 0D 1L

(unspecified) 1 game 0W 0D 1L

Reversed Chigorin Defense 1 game 1W 0D 0L

(unspecified) 1 game 1W 0D 0L

Benoni Defense 1 game 0W 0D 1L

Classical Variation 1 game 0W 0D 1L

(unspecified) 1 game 0W 0D 1L

Blunders Top 4 of 49

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

2026.03.22 · 10... Nxd4 (−41.5% win chance) 1-0

Sierra Romero, Ronald Esteban

Martinez Redondo, Victor Andres

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2026.10.28 · 34... Nxd1 (−34.7% win chance) 1-0

Sierra Romero, Ronald Esteban

Romero Ballesteros, Gabriel Matias

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2026.03.22 · 50. Rh8 (−34.2% win chance) 1/2-1/2

Cardona Salazar, Matias

Sierra Romero, Ronald Esteban

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2026.10.31 · 12... Nc6 (−23.5% win chance) 1-0

Sierra Romero, Ronald Esteban

Ortega Rueda, Nicolas

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Games Showing all 16 games

Date	Event	Round	Opponent	Result	Accuracy %	First moves
2026.10.31	Round 9: Ortega Rueda, Nicolas - Sierra Romero, Ronald Esteban	9.5	2026.10.31 Ortega Rueda, Nicolas (144407700) (1909)	0	90.40%	1. d4 Nf6 2. Bf4 c5 3. e3 g6
2026.10.30	Round 8: Villada Londono, Thomas - Sierra Romero, Ronald Esteban	8.6	2026.10.30 Villada Londono, Thomas (144405510) (1659)	1	92.00%	1. d4 Nf6 2. Nc3 c5 3. d5 e6
2026.10.30	Round 7: Sierra Romero, Ronald Esteban - Ladino Hernandez, Angel Joel	7.4	2026.10.30 Ladino Hernandez, Angel Joel (4496701) (1816)	0	90.90%	1. e4 e6 2. d4 d5 3. Nd2 dxe4
2026.10.29	Round 6: Sierra Romero, Ronald Esteban - Miranda Agudelo, Santiago	6.7	2026.10.29 Miranda Agudelo, Santiago (144451946) (1572)	1	97.00%	1. e4 c5 2. Nf3 Nc6 3. d4 cxd4
2026.10.29	Round 5: Ramirez Cervantes, Emanuel - Sierra Romero, Ronald Esteban	5.6	2026.10.29 Ramirez Cervantes, Emanuel (144455607) (1545)	½	92.00%	1. e4 c5 2. Nf3 Nc6 3. d4 cxd4
2026.10.28	Round 4: Sierra Romero, Ronald Esteban - Gurrute Samboni, Samuel Josue	4.10	2026.10.28 Gurrute Samboni, Samuel Josue (144447302) (1509)	1	95.20%	1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4
2026.10.28	Round 3: Romero Ballesteros, Gabriel Matias - Sierra Romero, Ronald Esteban	3.5	2026.10.28 Romero Ballesteros, Gabriel Matias (144402902) (1662)	0	89.00%	1. d4 Nf6 2. c4 c5 3. d5 e6
2026.10.27	Round 2: Sierra Romero, Ronald Esteban - Canon Nunez, Christopher Giovanny	2.9	2026.10.27 Canon Nunez, Christopher Giovanny (144429053)	*	-	1. e4 c5 2. Nf3 Nc6 3. d4 cxd4
2026.10.27	Round 1: Forero Vargas, David Enrique - Sierra Romero, Ronald Esteban	1.12	2026.10.27 Forero Vargas, David Enrique (144467290)	½	94.20%	1. e4 c5 2. Nf3 Nc6 3. d4 cxd4
2026.03.23	Round 7: Sierra Romero, Ronald Esteban - Ayala Gonzalez, Hector Manuel	7.17	2026.03.23 Ayala Gonzalez, Hector Manuel (4496698) (1426)	*	-	1. e4 e5 2. Nf3 Nc6 3. d4 d6
2026.03.23	Round 6: Zuluaga Penagos, Gabriel - Sierra Romero, Ronald Esteban	6.18	2026.03.23 Zuluaga Penagos, Gabriel (144439776)	½	-	1. e4 c5 2. Nf3 Nc6 3. d4 cxd4
2026.03.22	Round 5: Sierra Romero, Ronald Esteban - Gonzalez Martinez, Aitor	5.28	2026.03.22 Gonzalez Martinez, Aitor (144451083)	1	99.20%	1. e4 e5 2. Nf3 Nc6 3. d4 exd4
2026.03.22	Round 4: Martinez Redondo, Victor Andres - Sierra Romero, Ronald Esteban	4.20	2026.03.22 Martinez Redondo, Victor Andres (144422520)	0	87.30%	1. e4 c5 2. c3 e6 3. d4 cxd4
2026.03.22	Round 3: Sierra Romero, Ronald Esteban - Cardona Salazar, Matias	3.16	2026.03.22 Cardona Salazar, Matias (144417250) (1402)	½	86.40%	1. e4 c5 2. Nf3 g6 3. d4 cxd4
2026.03.21	Round 2: Alvarez Guzman, Joseph Emmanuel - Sierra Romero, Ronald Esteban	2.15	2026.03.21 Alvarez Guzman, Joseph Emmanuel (4498747) (1458)	0	80.90%	1. e4 c5 2. Nf3 Nc6 3. d3 e6
2026.03.20	Round 1: Sierra Romero, Ronald Esteban - Samuel Daniel Castellanos Castaneda	1.15	2026.03.20 Castellanos Castaneda, Samuel Daniel (144465483)	1	94.10%	1. e4 e5 2. Nf3 Nc6 3. d4 d6