Games played by Pierre Jean Costa
| White | ELO W | Black | ELO B | Result | Moves | ECO | Date | Tournament | View |
| Winckel, F | Costa, P | ½-½  |
23 | D90 | 2003 | St Quentin op 6th |
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| Costa, P | Cureau, M | ½-½ |
25 | C87 | 2003 | St Quentin op 6th |
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| Mazaltob, G | Costa, P | 0-1 |
50 | D85 | 2003 | St Quentin op 6th |
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| D'Avout d'Averstaedt, G | Costa, P | 1-0 |
47 | E61 | 2003 | St Quentin op 6th |
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| Costa, P | Le Scraigne, E | ½-½ |
20 | C65 | 2003 | St Quentin op 6th |
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| D'Avout d'Averstaedt, G | Costa, P | 1-0 |
47 | E61 | 2003 | St Quentin op 6th |
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| Wuthrich, G | Costa, P | 0-1 |
24 | D02 | 2003 | St Quentin op 6th |
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| Costa, P | Dubos, J | 0-1 |
54 | B76 | 2003 | St Quentin op 6th |
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