Piedra, Christopher
Current rating: 1875 (#853)
Record: 67-37-4
| Regional Championships Dallas 2023 (pioneer) | starting rating: 1859 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 397 | Kudva, Vikram (1719) | Lost 0-2 | -201839 |
| 2pioneer | 572 | Bartlett, Greg (1669) | Won 2-0 | +151854 |
| 3pioneer | 290 | Motchkavitz, Matt (1593) | Won 2-0 | +131867 |
| 4pioneer | 114 | Garcia, Christopher (1488) | Won 2-1 | +111878 |
| 5pioneer | 77 | Jao, Jeff (1846) | Won 2-1 | +181896 |
| 6pioneer | 60 | Adamson, Ryker (1565) | Won 2-1 | +121908 |
| 7pioneer | 50 | Wright, Matthew C (1718) | Lost 1-2 | -211887 |
| 8pioneer | 88 | Nossett, Miles (1633) | Lost 1-2 | -231864 |
| 9pioneer | 191 | Griffith, Cole (1594) | Won 2-0 | +131877 |
| 10pioneer | 85 | Shah-Jones, Hugo (1472) | Lost 1-2 | -251852 |
| 11pioneer | 116 | Duran, David (1711) | Won 2-1 | +161868 |
| 12pioneer | 102 | Chu, Xiong (1744) | Won 2-0 | +151883 |
| 13pioneer | 55 | Gallagher, Sean (1678) | Lost 1-2 | -211862 |
| 14pioneer | 73 | Blackburn, Justin (1578) | Won 2-1 | +131875 |
| top | average opponent: 1643record: 9-5 | new rating: 1875 | ||
| Grand Prix Orlando 2018 (M19 standard) | starting rating: 1887 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 58 | Coloyan, Peter (1741) | Won 2-1 | +151902 |
| 2standard | 86 | Mata, Andrew (1736) | Lost 1-2 | -211881 |
| 3standard | 258 | Power, John (1467) | Won 2-0 | +111892 |
| 4standard | 217 | Russo, David (1516) | Lost 0-2 | -241868 |
| 5standard | 349 | Perez, Antonio (1424) | Won 2-0 | +101878 |
| 6standard | 286 | De Los Santos, Julian (1844) | Lost 1-2 | -191859 |
| top | average opponent: 1621record: 3-3 | new rating: 1859 | ||
| Grand Prix Las Vegas 2017 (legacy) (legacy) | starting rating: 1806 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 196 | Hughes, David (1500) | Won 2-0 | +131819 |
| 2legacy | 365 | Chien, Andrew (1584) | Won 2-0 | +141833 |
| 3legacy | 338 | Haversat, Jacob (1825) | Lost 0-2 | -181815 |
| 4legacy | 684 | Shrader, Lance (1570) | Won 2-0 | +131828 |
| 5legacy | 259 | Chin, Jim (1484) | Won 2-0 | +121840 |
| 6legacy | 341 | Elenbogen, Andrew (1786) | Won 2-1 | +171857 |
| 7legacy | 155 | Morawski, Jonathan (2006) | Won 2-0 | +211878 |
| 8legacy | 130 | Mulligan, Richard (1564) | Lost 0-2 | -241854 |
| 9legacy | 172 | Crotti, Enrico (1588) | Lost 1-2 | -221832 |
| 10legacy | 217 | Davila, Gilbert (1532) | Won 2-1 | +121844 |
| 11legacy | 228 | Smith, Donald (1832) | Lost 1-2 | -181826 |
| 12legacy | 219 | Beg, Zaiem (1543) | Won 2-1 | +131839 |
| 13legacy | 210 | Bauer, David (1891) | Won 2-0 | +191858 |
| 14legacy | 114 | McHugh, Adam (1633) | Won 2-1 | +141872 |
| 15legacy | 103 | Prusa, Adam (1696) | Won 2-0 | +151887 |
| top | average opponent: 1669record: 11-4 | new rating: 1887 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1693 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 755 | Kimura, Yasunori (1500) | Won 2-0 | +141707 |
| 2legacy | 182 | Tsutsui, Yuki (1679) | Draw 1-1 | 01707 |
| 3legacy | 594 | Kurikawa, Hideyuki (1368) | Won 2-0 | +121719 |
| 4legacy | 302 | Yaman, Senturk (1491) | Won 2-1 | +141733 |
| 5legacy | 150 | Kajitani, Tsuyoshi (1564) | Won 2-1 | +151748 |
| 6legacy | 80 | Shibata, Kenta (1575) | Won 2-0 | +151763 |
| 7legacy | 39 | Oda, Kouichi (1528) | Lost 1-2 | -231740 |
| 8legacy | 129 | Sano, Masahiko (1559) | Won 2-0 | +151755 |
| 9legacy | 70 | Chen, Yen-Hsiang (1500) | Won 2-1 | +141769 |
| 10legacy | 43 | Lee, Shi Tian (2123) | Won 2-1 | +241793 |
| 11legacy | 22 | Aikawa, Yuki (1645) | Lost 0-2 | -211772 |
| 12legacy | 60 | Sakitani, Jyunya (1610) | Lost 1-2 | -211751 |
| 13legacy | 119 | Izushi, Kazuya (1594) | Won 2-0 | +151766 |
| 14legacy | 82 | Cho, Jeong Woo (1840) | Won 2-0 | +201786 |
| 15legacy | 50 | Harane, Kenta (1937) | Won 2-0 | +201806 |
| top | average opponent: 1634record: 11-3-1 | new rating: 1806 | ||
| Grand Prix Charlotte 2016 (modern) | starting rating: 1640 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 620 | McKinney, James (1507) | Draw 1-1 | -21638 |
| 2modern | 558 | Johnson, Jeffrey (1499) | Won 2-0 | +151653 |
| 3modern | 524 | Urcinola, Chris (1509) | Won 2-1 | +161669 |
| 4modern | 803 | Mei, Tony (1473) | Won 2-0 | +141683 |
| 5modern | 161 | Sumrow, Stephen (1538) | Draw 1-1 | -31680 |
| 6modern | 635 | Boccio, Matthew (1979) | Won 2-0 | +241704 |
| 7modern | 214 | Alabi, Hafez (1508) | Won 2-0 | +141718 |
| 8modern | 129 | Humphries, Jake (1615) | Lost 1-2 | -201698 |
| 9modern | 237 | Swan, Thomas (1648) | Won 2-0 | +171715 |
| 10modern | 156 | Bogucki, Woodrow (1744) | Won 2-1 | +191734 |
| 11modern | 96 | Totman, Andrew (1621) | Lost 0-2 | -201714 |
| 12modern | 171 | Kaiser, Taylor (1649) | Lost 1-2 | -191695 |
| 13modern | 211 | Norsworthy, Jeremy (1619) | Won 2-0 | +161711 |
| 14modern | 157 | Frankosky, Davin (1687) | Lost 1-2 | -181693 |
| top | average opponent: 1614record: 8-4-2 | new rating: 1693 | ||
| Grand Prix Seattle-Tacoma 2015 (legacy) | starting rating: 1587 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 623 | Jung, Mark (1471) | Won 2-1 | +161603 |
| 2legacy | 46 | Chembars, Richard (1517) | Won 2-0 | +161619 |
| 3legacy | 330 | Duterte, Daniel (1675) | Won 2-1 | +191638 |
| 4legacy | 81 | Pringle, Shaun (1497) | Won 2-1 | +161654 |
| 5legacy | 4 | Koch, Nathaniel (1553) | Lost 1-2 | -201634 |
| 6legacy | 167 | Jones, Mike (1518) | Won 2-1 | +161650 |
| 7legacy | 94 | Ruprecht, Adam (1947) | Won 2-1 | +231673 |
| 8legacy | 52 | Reilly, Devin (1546) | Lost 1-2 | -201653 |
| 9legacy | 114 | Shenhar, Shahar (1957) | Lost 0-2 | -131640 |
| top | average opponent: 1631record: 6-3 | new rating: 1640 | ||
| Grand Prix Orlando 2014 (KTK limited) | starting rating: 1529 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 566 | Melchor, Carlos (1585) | Won 2-1 | +191548 |
| 2sealed | 774 | Fountain, Nathan (1521) | Lost 0-2 | -191529 |
| 3sealed | 245 | Ren, Jiaoli (1402) | Won 2-0 | +161545 |
| 4sealed | 274 | Kubler, Carl (1520) | Won 0-0 | +181563 |
| 5sealed | 108 | Trifilo, Bradley (1665) | Draw 1-1 | +11564 |
| 6sealed | 147 | Gribbin, Sean (1535) | Won 2-0 | +181582 |
| 7sealed | 82 | Staton, Destiny (1554) | Won 2-1 | +171599 |
| 8sealed | 46 | Majors, Michael (1905) | Lost 1-2 | -121587 |
| top | average opponent: 1586record: 5-2-1 | new rating: 1587 | ||
| Grand Prix Miami 2013 (DGM standard) | starting rating: 1505 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 364 | Sanchez, Douglas (1470) | Lost 1-2 | -181487 |
| 2standard | 416 | Davis, Darrin (1480) | Won 2-1 | +171504 |
| 3standard | 363 | Barnes, Michael (1483) | Lost 0-2 | -181486 |
| 4standard | 525 | Baerwalde, Brooke (1482) | Won 2-0 | +181504 |
| 5standard | 459 | Kersey, Nick (1502) | Won 2-1 | +181522 |
| 6standard | 308 | Black, Samuel (1975) | Won 2-1 | +261548 |
| 7standard | 125 | Giraldi, Jesse (1502) | Lost 1-2 | -191529 |
| top | average opponent: 1556record: 4-3 | new rating: 1529 | ||
| Grand Prix Atlanta 2012 (legacy) | starting rating: 1508 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 33 | Park, Sean (1485) | Lost 0-2 | -181490 |
| 2legacy | 291 | Patel, Vilish b (1482) | Won 2-0 | +181508 |
| 3legacy | 199 | Johnson, George T (1482) | Won 2-1 | +171525 |
| 4legacy | 300 | Mitchell, Greg 1205 (1504) | Won 2-0 | +181543 |
| 5legacy | 113 | King, Byron (1510) | Lost 0-2 | -191524 |
| 6legacy | 180 | Ledford, Charles (1521) | Lost 0-2 | -181506 |
| 7legacy | 252 | Allen, Dustin (1483) | Won 2-1 | +181524 |
| 8legacy | 226 | Eitel, Matthew (1492) | Lost 0-2 | -191505 |
| top | average opponent: 1495record: 4-4 | new rating: 1505 | ||
| Grand Prix Atlanta 2011 (extended) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 436 | Dunks, Jess (1543) | Won 2-0 | +191523 |
| 2extended | 410 | Darby, Scott (1601) | Lost 1-2 | -171506 |
| 3extended | 551 | Gaard, Sam (1624) | Lost 1-2 | -161490 |
| 4extended | 605 | Counts, Ryan (1516) | Won 2-0 | +191509 |
| 5extended | 624 | Giachetti, Shane (1499) | Won 2-0 | +171526 |
| 6extended | 516 | Conrad, Tanner (1518) | Lost 1-2 | -181508 |
| top | average opponent: 1550record: 3-3 | new rating: 1508 | ||
| Grand Prix Tampa 2009 (ZEN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 191 | Beauchamp, Adam (1535) | Won 2-1 | +191519 |
| 2sealed | 136 | Arris, Troy (1503) | Won 2-0 | +171536 |
| 3sealed | 43 | Monsalve, Andres (1578) | Lost 0-2 | -171519 |
| 4sealed | 124 | Leddy, Michael (1517) | Lost 0-2 | -181501 |
| 5sealed | 296 | Goldstein, Max (1503) | Won 2-0 | +181519 |
| 6sealed | 158 | Bartolomei, Iain (1675) | Lost 1-2 | -151504 |
| top | average opponent: 1552record: 3-3 | new rating: 1504 | ||