| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. J Guerra Mendez vs L Aroshidze |
| ½-½ | 25 | 2017 | TCh-CAT Gp2 | B40 Sicilian |
| 27. J M Lopez Martinez vs J Guerra Mendez |
 | 1-0 | 30 | 2017 | TCh-CAT Gp2 | B12 Caro-Kann Defense |
| 28. J Guerra Mendez vs J Magem Badals |
| ½-½ | 14 | 2017 | TCh-CAT Gp2 | B41 Sicilian, Kan |
| 29. A Jerez Perez vs J Guerra Mendez |
| ½-½ | 57 | 2017 | TCh-CAT Gp2 | B18 Caro-Kann, Classical |
| 30. J Guerra Mendez vs A Pablo Marin |
| 1-0 | 34 | 2017 | TCh-CAT Gp2 | B18 Caro-Kann, Classical |
| 31. A Rakhmanov vs J Guerra Mendez |
| 1-0 | 36 | 2017 | TCh-CAT Gp2 | E47 Nimzo-Indian, 4.e3 O-O 5.Bd3 |
| 32. J Guerra Mendez vs M Munoz Pantoja |
| 1-0 | 71 | 2018 | ch-CAT | B32 Sicilian |
| 33. M Munoz Pantoja vs J Guerra Mendez |
| 0-1 | 73 | 2018 | ch-CAT | C22 Center Game |
| 34. H Asis Gargatagli vs J Guerra Mendez |
| ½-½ | 27 | 2018 | ch-CAT | C50 Giuoco Piano |
| 35. J Guerra Mendez vs H Asis Gargatagli |
| 0-1 | 43 | 2018 | ch-CAT | B90 Sicilian, Najdorf |
| 36. J Guerra Mendez vs H Asis Gargatagli |
| ½-½ | 56 | 2018 | ch-CAT | B15 Caro-Kann |
| 37. H Asis Gargatagli vs J Guerra Mendez |
| ½-½ | 59 | 2018 | ch-CAT | C50 Giuoco Piano |
| 38. M Illescas vs J Guerra Mendez |
| 1-0 | 58 | 2018 | 20th Sants Open | A28 English |
| 39. F Peralta vs J Guerra Mendez |
| ½-½ | 32 | 2018 | Barcelona Masters CAT-ARG | E12 Queen's Indian |
| 40. J Guerra Mendez vs S Mareco |
| 0-1 | 130 | 2018 | Barcelona Masters CAT-ARG | B22 Sicilian, Alapin |
| 41. S Mareco vs J Guerra Mendez |
| ½-½ | 25 | 2018 | Barcelona Rapid CAT-ARG | A13 English |
| 42. J Guerra Mendez vs F Peralta |
| 0-1 | 35 | 2018 | Barcelona Rapid CAT-ARG | B08 Pirc, Classical |
| 43. F Peralta vs J Guerra Mendez |
| ½-½ | 51 | 2018 | Barcelona Rapid CAT-ARG | E12 Queen's Indian |
| 44. J Guerra Mendez vs S Mareco |
| 0-1 | 40 | 2018 | Barcelona Rapid CAT-ARG | A07 King's Indian Attack |
| 45. J Guerra Mendez vs A Rosell |
| ½-½ | 34 | 2020 | TCh-CAT Gp1 | B50 Sicilian |
| 46. J Guerra Mendez vs C Albornoz Cabrera |
| 0-1 | 33 | 2020 | TCh-CAT Gp1 | A14 English |
| 47. J Guerra Mendez vs V Larkin |
| ½-½ | 34 | 2025 | Portuguese Top League | A46 Queen's Pawn Game |
| 48. V Carnicelli vs J Guerra Mendez |
| ½-½ | 91 | 2025 | Portuguese Top League | B90 Sicilian, Najdorf |
| 49. J Guerra Mendez vs A G Dorado |
| 1-0 | 48 | 2025 | Portuguese Top League | D05 Queen's Pawn Game |
| 50. J Guerra Mendez vs H Carneiro Sousa |
| 1-0 | 34 | 2025 | Portuguese Top League | A46 Queen's Pawn Game |
Kibitzing
