| Dec 28, 2023 | Nikola Mitkov | 0–1 | Jianchao Zhou | Round 5: Nikola Mitkov - Jianchao Zhou | Sicilian Defense: Closed | |
| Dec 28, 2023 | Zaven Andriasian | ½–½ | Nikola Mitkov | Round 4: Zaven Andriasian - Nikola Mitkov | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Nov 10, 2023 | Cristhian Cruz | ½–½ | Nikola Mitkov | Round 9: Cristhian Cruz - Nikola Mitkov | Queen's Gambit Declined: Ragozin Defense | |
| Nov 10, 2023 | Nikola Mitkov | ½–½ | Alex Antonio Delgado Rosas | Round 8: Nikola Mitkov - Alex Antonio Delgado Rosas | Sicilian Defense: Closed | |
| Nov 9, 2023 | Carlos Fernando Neira Rodriguez | 0–1 | Nikola Mitkov | Round 7: Carlos Fernando Neira Rodriguez - Nikola Mitkov | Queen's Gambit Declined: Ragozin Defense, Alekhine Variation | |
| Nov 9, 2023 | Nikola Mitkov | 1–0 | Aldair Antonio Ferreira Araujo | Round 6: Nikola Mitkov - Aldair Antonio Ferreira Araujo | Sicilian Defense: Closed, Traditional | |
| Nov 8, 2023 | Andre Mendez Machado | 1–0 | Nikola Mitkov | Round 5: Andre Mendez Machado - Nikola Mitkov | Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line | |
| Nov 8, 2023 | Nikola Mitkov | 1–0 | Pedro Jose Gonzalez Soto | Round 4: Nikola Mitkov - Pedro Jose Gonzalez Soto | Sicilian Defense: Closed, Traditional | |
| Nov 7, 2023 | Johan-Sebastian Christiansen | 1–0 | Nikola Mitkov | Round 3: Johan-Sebastian Christiansen - Nikola Mitkov | Scotch Game: Potter Variation | |
| Nov 7, 2023 | Nikola Mitkov | 1–0 | Felipe Gabriel Chen Austin | Round 2: Nikola Mitkov - Felipe Gabriel Chen Austin | Sicilian Defense: Closed, Traditional | |
| Nov 7, 2023 | Ian Pierre Carrasco Chong | 0–1 | Nikola Mitkov | Round 1: Ian Pierre Carrasco Chong - Nikola Mitkov | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit | |
| Oct 15, 2023 | Munir Ben Jemaa | 0–1 | Nikola Mitkov | Round 5: Munir Ben Jemaa - Nikola Mitkov | Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred | |
| Oct 15, 2023 | Nikola Mitkov | ½–½ | Marvin Gao | Round 4: Nikola Mitkov - Marvin Gao | Sicilian Defense: Closed | |
| Oct 14, 2023 | John Ligotti | ½–½ | Nikola Mitkov | Round 3: John Ligotti - Nikola Mitkov | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Aug 6, 2023 | Terry Luo | 1–0 | Nikola Mitkov | Round 9: Terry Luo - Nikola Mitkov | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Aug 6, 2023 | Nikola Mitkov | ½–½ | Harshid Kunka | Round 8: Nikola Mitkov - Harshid Kunka | Caro-Kann Defense: Two Knights Attack | |
| Aug 5, 2023 | Nikola Mitkov | 1–0 | Maximillian Lu | Round 7: Nikola Mitkov - Maximillian Lu | King's Pawn Game | |
| Aug 5, 2023 | Aaron Jacobson | ½–½ | Nikola Mitkov | Round 6: Aaron Jacobson - Nikola Mitkov | Queen's Gambit Declined: Ragozin Defense, Alekhine Variation | |
| Aug 4, 2023 | Nikola Mitkov | 1–0 | Ezra Chambers | Round 5: Nikola Mitkov - Ezra Chambers | Queen's Pawn Game: Accelerated London System | |
| Aug 4, 2023 | Mark Heimann | 0–1 | Nikola Mitkov | Round 4: Mark Heimann - Nikola Mitkov | Scotch Game | |
| Aug 3, 2023 | Nikola Mitkov | ½–½ | Vladimir Georgiev | Round 3: Nikola Mitkov - Vladimir Georgiev | Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation | |
| Aug 3, 2023 | Sam Schmakel | ½–½ | Nikola Mitkov | Round 2: Sam Schmakel - Nikola Mitkov | Scotch Game: Potter Variation | |
| Aug 2, 2023 | Nikola Mitkov | ½–½ | G Peter Arnaudov | Round 1: Nikola Mitkov - G Peter Arnaudov | Queen's Gambit Declined | |
| Jul 13, 2023 | Ethan Sheehan | ½–½ | Nikola Mitkov | Round 9 (15m): Ethan Sheehan - Nikola Mitkov | Ruy Lopez: Exchange Variation, Normal Variation | |
| Jul 13, 2023 | Nikola Mitkov | ½–½ | Aryan Gutla | Round 8 (15m): Nikola Mitkov - Aryan Gutla | Sicilian Defense: Closed | |
| Jul 13, 2023 | Megan Lee | 0–1 | Nikola Mitkov | Round 7: Megan Lee - Nikola Mitkov | Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred | |
| Jul 12, 2023 | Nikola Mitkov | 1–0 | Neil Doknjas | Round 6: Nikola Mitkov - Neil Doknjas | Sicilian Defense: Kan Variation, Wing Attack, Spraggett Attack | |
| Jul 11, 2023 | Sean Senft | 1–0 | Nikola Mitkov | Round 5: Sean Senft - Nikola Mitkov | Queen's Indian Defense: Kasparov-Petrosian Variation, Main Line | |
| Jul 10, 2023 | Nicholas Vettese | 1–0 | Nikola Mitkov | Round 3: Nicholas Vettese - Nikola Mitkov | Scotch Game: Potter Variation | |
| Jul 10, 2023 | Nikola Mitkov | ½–½ | Andrew Jiang | Round 2: Nikola Mitkov - Andrew Jiang | Bishop's Opening: Berlin Defense | |
| Jul 9, 2023 | Evan Ai | ½–½ | Nikola Mitkov | Round 1: Evan Ai - Nikola Mitkov | Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred | |
| Jul 3, 2023 | Nikola Mitkov | 0–1 | Lino Orlando Blanco Fernandez | Round 9: Nikola Mitkov - Lino Orlando Blanco Fernandez | Sicilian Defense: Kan Variation, Knight Variation | |
| Jul 3, 2023 | Alejandro Ramirez | 1–0 | Nikola Mitkov | Round 8: Alejandro Ramirez - Nikola Mitkov | Zukertort Opening | |
| Jul 2, 2023 | Jorge Samuel Bobadilla Viera | ½–½ | Nikola Mitkov | Round 7: Jorge Samuel Bobadilla Viera - Nikola Mitkov | Bogo-Indian Defense: Retreat Variation | |
| Jul 1, 2023 | Nikola Mitkov | ½–½ | Roberto Garcia Pantoja | Round 6: Nikola Mitkov - Roberto Garcia Pantoja | Caro-Kann Defense: Two Knights Attack | |
| Jun 30, 2023 | Miguel A. Valdes Martinez | 0–1 | Nikola Mitkov | Round 5: Miguel A. Valdes Martinez - Nikola Mitkov | Queen's Pawn Game: Colle System, Anti-Colle | |
| Jun 30, 2023 | Nikola Mitkov | ½–½ | Jorge Cori | Round 4: Nikola Mitkov - Jorge Cori | Italian Game: Giuoco Pianissimo, Italian Four Knights Variation | |
| Jun 29, 2023 | Pablo Alexander Ruiz Aguilar | 0–1 | Nikola Mitkov | Round 3: Pablo Alexander Ruiz Aguilar - Nikola Mitkov | Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred | |
| Jun 29, 2023 | Nikola Mitkov | 1–0 | Sara Moncada Correa | Round 2: Nikola Mitkov - Sara Moncada Correa | French Defense: Rubinstein Variation, Fort Knox Variation | |
| May 29, 2023 | Nikola Mitkov | ½–½ | Gabriela Antova | 32nd Annual Chicago Open | Bishop's Opening: Vienna Hybrid | |
| May 27, 2023 | Liordis Vera | * | Nikola Mitkov | 32nd Annual Chicago Open | ? | |
| May 26, 2023 | Nikola Mitkov | * | Deepak Aaron | 32nd Annual Chicago Open | ? | |
| May 21, 2023 | Julio Becerra | ½–½ | Nikola Mitkov | Round 5: Julio Becerra - Nikola Mitkov | Ruy Lopez: Exchange Variation, Alapin Gambit | |
| May 21, 2023 | Nikola Mitkov | ½–½ | Jianchao Zhou | Round 4: Nikola Mitkov - Jianchao Zhou | Sicilian Defense: Closed | |
| May 20, 2023 | Brejesh Chakrabarti | 0–1 | Nikola Mitkov | Round 3: Brejesh Chakrabarti - Nikola Mitkov | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| May 20, 2023 | Nikola Mitkov | 1–0 | Scott Ramer | Round 2: Nikola Mitkov - Scott Ramer | Vienna Game: Frankenstein-Dracula Variation | |
| May 20, 2023 | Ulises De Cozar | 0–1 | Nikola Mitkov | Round 1: Ulises De Cozar - Nikola Mitkov | English Opening: King's English Variation | |
| Apr 9, 2023 | Oscar Gerardo Sanchez Enriquez | 0–1 | Nikola Mitkov | Round 8: Nikola Mitkov - Luis Carlos Torres Rosas | Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred | |
| Apr 9, 2023 | Nikola Mitkov | 1–0 | Carlos Sandoval Mercado | Round 9: Nikola Mitkov - Carlos Sandoval Mercado | Sicilian Defense: Closed | |
| Apr 8, 2023 | Nikola Mitkov | ½–½ | Luis Carlos Torres Rosas | Round 7: Nikola Mitkov - Luis Carlos Torres Rosas | Sicilian Defense: Sozin Attack, Main Line | |
| Apr 7, 2023 | Rogerio Sperb Becker | 0–1 | Nikola Mitkov | Round 6 | 11-20: Rogerio Sperb Becker - Nikola Mitkov | Bishop's Opening: Vienna Hybrid | |
| Apr 7, 2023 | Nikola Mitkov | * | Enmanuel Rey Galvan | Round 1: Nikola Mitkov - Enmanuel Rey Galvan | Sicilian Defense: Closed | |
| Apr 7, 2023 | Nikola Mitkov | ½–½ | Edwin Urbina Quiroz | Round 5 | 11-20: Nikola Mitkov - Edwin Urbina Quiroz | Bishop's Opening: Vienna Hybrid | |
| Apr 7, 2023 | Julio Cesar Diaz Rosas | 1–0 | Nikola Mitkov | Round 4: Julio Cesar Diaz Rosas - Nikola Mitkov | Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred | |
| Apr 6, 2023 | Nikola Mitkov | 1–0 | Pablo Adib Tapie Amione | Round 3 | 11-20: Nikola Mitkov - Pablo Adib Tapie Amione | Sicilian Defense: Closed, Anti-Sveshnikov Variation, with d6 | |
| Apr 6, 2023 | Julian Estrada Nieto | * | Nikola Mitkov | Round 2: Julian Estrada Nieto - Nikola Mitkov | Ruy Lopez: Morphy Defense, Classical Defense Deferred | |
| Jan 8, 2023 | Nikola Mitkov | 1–0 | Vladimir Georgiev | Round 5: Nikola Mitkov - Vladimir Georgiev | Sicilian Defense: Kan Variation, Wing Attack | |
| Jan 8, 2023 | Bach Ngo | ½–½ | Nikola Mitkov | Round 4: Bach Ngo - Nikola Mitkov | Queen's Gambit Declined: Ragozin Defense | |
| Jan 7, 2023 | Nikola Mitkov | 1–0 | Mikhail Zlotnikov | Round 3: Nikola Mitkov - Mikhail Zlotnikov | Modern Defense | |
| Jan 7, 2023 | Ray Kaufman | ½–½ | Nikola Mitkov | Round 2: Ray Kaufman - Nikola Mitkov | Queen's Gambit Declined: Queen's Knight Variation | |
| Jan 7, 2023 | Nikola Mitkov | 1–0 | Cesar Valido Bouza | Round 1: Nikola Mitkov - Cesar Valido Bouza | Vienna Game: Stanley Variation, Reversed Spanish | |
| Dec 30, 2023 | Nikola Mitkov | 1–0 | Dalton Perrine | 33rd Annual North American Open | Caro-Kann Defense | |
| Dec 29, 2023 | Eric Lawson | 0–1 | Nikola Mitkov | 33rd Annual North American Open | Queen's Pawn Game: Chigorin Variation, Alburt Defense | |
| Nov 20, 2022 | Nikola Mitkov | ½–½ | Pedro Perez | Round 5: Nikola Mitkov - Pedro Perez | Sicilian Defense: Closed, Traditional | |
| Nov 20, 2022 | Brejesh Chakrabarti | ½–½ | Nikola Mitkov | Round 4: Brejesh Chakrabarti - Nikola Mitkov | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Nov 19, 2022 | Nikola Mitkov | 1–0 | Aldo Lopez | Round 3: Nikola Mitkov - Aldo Lopez | French Defense: Winawer Variation, Alekhine Gambit, Kan Variation | |
| Nov 19, 2022 | Jessica Regam | ½–½ | Nikola Mitkov | test: Chapter 1 | Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred | |