Guiang, Mark
Current rating: 1786 (#2593)
Record: 58-36-1
| Grand Prix Oakland 2019 (modern) | starting rating: 1819 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 291 | Valentino, Jayme (1432) | Won 2-0 | +111830 |
| 2modern | 189 | Milechman, Daniel (1706) | Won 2-0 | +161846 |
| 3modern | 48 | [anonymous] | Lost 0-2 | -251821 |
| 4modern | 336 | McCamey, Bobby (1473) | Lost 0-2 | -241797 |
| 5modern | 304 | Shagla-McKotch, Alexander (1459) | Won 2-0 | +121809 |
| 6modern | 243 | Montgomery, John (1517) | Lost 1-2 | -231786 |
| top | average opponent: 1508record: 3-3 | new rating: 1786 | ||
| Grand Prix Los Angeles 2016 (modern) | starting rating: 1757 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 169 | Daykin, Tyler (1403) | Won 2-0 | +121769 |
| 2modern | 292 | Moreland, William (1431) | Won 2-1 | +121781 |
| 3modern | 340 | Corvese, Harry (1773) | Won 2-1 | +181799 |
| 4modern | 180 | Nguyen, Minh D (1639) | Won 2-0 | +151814 |
| 5modern | 21 | Crawford, Matthew (1525) | Won 2-1 | +131827 |
| 6modern | 45 | Black, Joe (1591) | Won 2-1 | +141841 |
| 7modern | 2 | Sacher, AJ (1931) | Won 2-1 | +201861 |
| 8modern | 11 | Li, Jinlin (1714) | Draw 1-1 | -31858 |
| 9modern | 9 | Rodrigues, Thiago (1848) | Won 2-1 | +181876 |
| 10modern | 5 | Hunter, Sean (1546) | Lost 1-2 | -241852 |
| 11modern | 20 | Lee, Valerian (1636) | Lost 1-2 | -221830 |
| 12modern | 55 | Lopez, Carlos (1715) | Lost 0-2 | -201810 |
| 13modern | 101 | Cords, Joshua (1623) | Won 2-0 | +151825 |
| 14modern | 70 | Pierce, Stephen (1719) | Lost 1-2 | -201805 |
| 15modern | 108 | Miller, Sean (1574) | Won 2-1 | +141819 |
| top | average opponent: 1645record: 10-4-1 | new rating: 1819 | ||
| Grand Prix Oakland 2016 (BFZ standard) | starting rating: 1751 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 467 | Barragan, Jesus (1447) | Won 2-0 | +121763 |
| 2standard | 196 | Satta-Hutton, Kale (1693) | Won 2-1 | +171780 |
| 3standard | 366 | Ulanov, Denis (1766) | Won 2-0 | +181798 |
| 4standard | 187 | Eck, Kyle (1705) | Won 2-1 | +161814 |
| 5standard | 68 | Weitz, Benjamin (2102) | Lost 0-2 | -131801 |
| 6standard | 89 | Munteanu, Laura (1479) | Lost 1-2 | -231778 |
| 7standard | 274 | Oaks, Christian (1508) | Won 2-1 | +131791 |
| 8standard | 232 | Zeoli, Benny (1562) | Won 2-1 | +141805 |
| 9standard | 132 | Hoffeld, Joshua (1657) | Lost 1-2 | -211784 |
| 10standard | 178 | Gogol, Billy (1604) | Lost 1-2 | -211763 |
| 11standard | 194 | Hsu, Charlie (1598) | Won 2-0 | +151778 |
| 12standard | 142 | Li, Chen (1646) | Lost 1-2 | -211757 |
| top | average opponent: 1647record: 7-5 | new rating: 1757 | ||
| Grand Prix Los Angeles 2014 (KTK standard) | starting rating: 1738 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 386 | Way, Eric (1539) | Won 2-0 | +141752 |
| 3standard | 43 | Siazon, Gerard (1586) | Won 2-0 | +151767 |
| 4standard | 139 | Stephenson, Scott (1553) | Won 2-1 | +141781 |
| 5standard | 549 | Carvalho, Pedro (1890) | Won 2-1 | +201801 |
| 6standard | 22 | Akers, Chris (1695) | Won 2-0 | +161817 |
| 7standard | 19 | Skallerup, Josiah (1655) | Lost 1-2 | -211796 |
| 8standard | 36 | Hixson, Jeremy (1487) | Lost 1-2 | -231773 |
| 9standard | 92 | Ramirez, Daniel (1551) | Lost 1-2 | -221751 |
| top | average opponent: 1620record: 5-3 | new rating: 1751 | ||
| Grand Prix Sacramento 2014 (THS limited) | starting rating: 1643 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 1108 | Antuzzi, David (1518) | Won 2-0 | +161659 |
| 3sealed | 1115 | Dirks, Dan (1536) | Won 2-0 | +161675 |
| 4sealed | 1061 | Myers, William (1492) | Won 2-1 | +151690 |
| 5sealed | 1022 | Severson, Eric (1657) | Lost 0-2 | -191671 |
| 6sealed | 1070 | Cui, Andy (1557) | Won 2-1 | +161687 |
| 7sealed | 1024 | Watts, Timothy (1525) | Won 2-1 | +151702 |
| 8sealed | 1010 | Ferguson, Charles (1649) | Won 2-0 | +171719 |
| 9sealed | 1014 | Boeckmann, Trevor (1613) | Won 2-0 | +161735 |
| 10draft | 90 | Ha, Raymond (1627) | Won 2-0 | +161751 |
| 11draft | 45 | Moulton, Jesse (1774) | Lost 0-2 | -171734 |
| 12draft | 24 | Gillam, Tim (1719) | Won 2-0 | +171751 |
| 13draft | 43 | Pettingill, Christopher (1824) | Lost 0-2 | -161735 |
| 14draft | 20 | Chapman, Ben (1701) | Won 2-1 | +171752 |
| 15draft | 26 | Vidugiris, Gaudenis (1952) | Lost 0-2 | -141738 |
| top | average opponent: 1653record: 10-4 | new rating: 1738 | ||
| Grand Prix Oakland 2013 (M14 limited) | starting rating: 1652 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 572 | Weiner, Andrew (1489) | Won 2-1 | +151667 |
| 4sealed | 134 | Rietzl, Paul (1832) | Lost 0-2 | -151652 |
| 5sealed | 138 | Keding, Reggie (1537) | Won 2-0 | +161668 |
| 6sealed | 51 | Heath, Joel (1606) | Won 2-0 | +171685 |
| 7sealed | 248 | Ciuca, Razvan (1544) | Lost 0-2 | -211664 |
| 8sealed | 192 | Williams, Spencer (1499) | Lost 0-2 | -211643 |
| top | average opponent: 1585record: 3-3 | new rating: 1643 | ||
| Grand Prix San Diego 2013 (modern) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 36 | Cabal, Christopher (1518) | Won 2-0 | +191502 |
| 3modern | 183 | Colt, Cody (1519) | Won 2-0 | +181520 |
| 4modern | 64 | Scott-Vargas, Luis (1850) | Lost 0-2 | -121508 |
| 5modern | 156 | Carey-Lang, Sullivan (1541) | Won 2-0 | +191527 |
| 6modern | 106 | Jurek, Benjamin (1487) | Won 2-0 | +171544 |
| 7modern | 61 | Pan, Phimus (1670) | Lost 1-2 | -161528 |
| 8modern | 36 | Pugliese, Tyler (1494) | Won 2-1 | +181546 |
| 9modern | 36 | Sidher, Ricky (1862) | Won 2-1 | +231569 |
| 10modern | 25 | Sittner, Alex (1751) | Won 2-0 | +221591 |
| 11modern | 18 | Carrera, Oscar (1581) | Lost 1-2 | -191572 |
| 12modern | 31 | Tang, Jeffery (1564) | Won 2-0 | +181590 |
| 13modern | 21 | Ogreenc, Greg (1714) | Won 2-1 | +211611 |
| 14modern | 21 | Burkhart, Corey (1614) | Won 2-0 | +181629 |
| 15modern | 10 | Majlaton, Alex (1939) | Won 2-0 | +231652 |
| top | average opponent: 1650record: 11-3 | new rating: 1652 | ||
| Grand Prix Manila 2012 (AVR standard) | starting rating: 1495 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 38 | Sirilertvorakul, Veerapat (1777) | Lost 0-2 | -131482 |
| 3standard | 325 | Lingling, Ken (1484) | Lost 1-2 | -181464 |
| 4standard | 385 | Eusebio, Ariel (1447) | Lost 0-2 | -191445 |
| 5standard | 443 | Abellera, John Michaet (1466) | Won 2-1 | +191464 |
| 6standard | 349 | Laudencia, Mikhail (1525) | Won 2-1 | +191483 |
| 7standard | 338 | Tinio, David P (1498) | Won 2-0 | +181501 |
| 8standard | 223 | Tan, Liam Gabriel (1518) | Lost 1-2 | -181483 |
| top | average opponent: 1531record: 3-4 | new rating: 1483 | ||
| Grand Prix Manila 2010 (ROE standard) | starting rating: 1549 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 21 | Bandou, Junichirou (1665) | Lost 1-2 | -161533 |
| 3standard | 211 | Sabater, Aldin (1500) | Lost 1-2 | -191514 |
| 4standard | 370 | Santos, Fernando (1482) | Lost 0-2 | -181496 |
| 5standard | 405 | Aquino, Miguel Carlos (1464) | Won 2-0 | +171513 |
| 6standard | 340 | Valle, Andrew (1483) | Lost 1-2 | -181495 |
| top | average opponent: 1519record: 1-4 | new rating: 1495 | ||
| Grand Prix Manila 2008 (Lorwyn block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 194 | Bulante, Fernando B (1500) | Won 2-0 | +181518 |
| 2block | 136 | Yam, Wing Chun (1500) | Lost 1-2 | -181500 |
| 3block | 120 | Cabigao, Eden Gabriel (1500) | Won 2-1 | +181518 |
| 4block | 125 | Lazaro, Paul Ernest (1574) | Won 2-0 | +191537 |
| 5block | 21 | Chao, Peter (1609) | Won 2-1 | +191556 |
| 6block | 16 | Relucio, Jonathan (1572) | Won 2-1 | +181574 |
| 7block | 2 | Mihara, Makihito (2125) | Lost 1-2 | -91565 |
| 8block | 24 | Nakajima, Chikara (1644) | Lost 0-2 | -161549 |
| top | average opponent: 1628record: 5-3 | new rating: 1549 | ||