| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 801. D Kosic vs Macieja |
| 0-1 | 32 |
2012 |
Chess Olympiad | D39 Queen's Gambit Declined, Ragozin, Vienna Variation |
| 802. Macieja vs G Gajewski |
| 1-0 | 41 |
2012 |
Polish Championships | D38 Queen's Gambit Declined, Ragozin Variation |
| 803. Macieja vs D Fernandez |
| 1-0 | 37 |
2012 |
2nd UNAM Open Section I | B81 Sicilian, Scheveningen, Keres Attack |
| 804. Macieja vs A Manea |
 | 1-0 | 16 |
2012 |
13th European Individual Championship | B48 Sicilian, Taimanov Variation |
| 805. Robson vs Macieja |
| 1-0 | 72 |
2012 |
Chess Olympiad | B48 Sicilian, Taimanov Variation |
| 806. R Wojtaszek vs Macieja |
| ½-½ | 47 |
2012 |
Polish Championships | D39 Queen's Gambit Declined, Ragozin, Vienna Variation |
| 807. Macieja vs J Gonzalez Garcia |
| 1-0 | 56 |
2012 |
2nd UNAM Open Section I | A31 English, Symmetrical, Benoni Formation |
| 808. Macieja vs N Djukic |
| 1-0 | 35 |
2012 |
13th European Individual Championship | E92 King's Indian |
| 809. Macieja vs F Berkes |
| ½-½ | 33 |
2012 |
Chess Olympiad | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 810. M Bartel vs Macieja |
| ½-½ | 40 |
2012 |
Polish Championships | D02 Queen's Pawn Game |
| 811. A Hambleton vs Macieja |
| ½-½ | 27 |
2012 |
2nd UNAM Open Section I | A10 English |
| 812. M Codenotti vs Macieja |
| ½-½ | 42 |
2012 |
13th European Individual Championship | B30 Sicilian |
| 813. Macieja vs I Khmelniker |
| 1-0 | 50 |
2012 |
13th European Individual Championship | D99 Grunfeld Defense, Smyslov |
| 814. Macieja vs V Babula |
| 1-0 | 80 |
2012 |
Chess Olympiad | B07 Pirc |
| 815. Macieja vs K Kuzmicz |
 | 1-0 | 41 |
2012 |
Polish Championships | B10 Caro-Kann |
| 816. Macieja vs H Hernandez |
| 1-0 | 56 |
2012 |
2nd UNAM Open Section I | E11 Bogo-Indian Defense |
| 817. A Stella vs Macieja |
| 0-1 | 33 |
2012 |
13th European Individual Championship | A20 English |
| 818. S Mareco vs Macieja |
| 0-1 | 36 |
2012 |
Chess Olympiad | A28 English |
| 819. Macieja vs D Swiercz |
| 1-0 | 55 |
2012 |
Polish Championships | A10 English |
| 820. Macieja vs J Estrada Nieto |
| 1-0 | 50 |
2012 |
2nd UNAM Open Section I | C97 Ruy Lopez, Closed, Chigorin |
| 821. Macieja vs E Nakar |
| 0-1 | 34 |
2012 |
13th European Individual Championship | E92 King's Indian |
| 822. A Riazantsev vs Macieja |
| 1-0 | 72 |
2012 |
13th European Individual Championship | D39 Queen's Gambit Declined, Ragozin, Vienna Variation |
| 823. G Guseinov vs Macieja |
| ½-½ | 32 |
2012 |
Chess Olympiad | B48 Sicilian, Taimanov Variation |
| 824. K Miton vs Macieja |
| ½-½ | 31 |
2012 |
Polish Championships | D32 Queen's Gambit Declined, Tarrasch |
| 825. I R Ortiz Suarez vs Macieja |
| 0-1 | 53 |
2012 |
2nd UNAM Open Section I | B18 Caro-Kann, Classical |