Ma, Geoff
Current rating: 1704 (#6255)
Record: 47-31
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1676 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 369 | Nakamura, Kazuhiro (1489) | Won 2-1 | +151691 |
| 4sealed | 194 | Yamaguchi, Tomoyuki (1569) | Lost 1-2 | -201671 |
| 5sealed | 409 | Harada, Akio (1491) | Won 2-1 | +151686 |
| 6sealed | 298 | Endo, Natsumi (1551) | Lost 0-2 | -211665 |
| 7sealed | 469 | Yamada, Takahiro (1430) | Won 2-0 | +141679 |
| 8sealed | 288 | Hozuki, Atsushi (1448) | Won 2-0 | +141693 |
| 9sealed | 119 | Matsubara, Ichiro (1700) | Won 2-0 | +181711 |
| 10draft | 26 | Soh, Joe (2123) | Lost 0-2 | -111700 |
| 11draft | 337 | Lee, Kuangyao (1604) | Won 2-1 | +161716 |
| 12draft | 177 | Tsuchihashi, Takuya (1799) | Lost 1-2 | -161700 |
| 13draft | 40 | Ieda, Toma (1552) | Won 2-0 | +151715 |
| 14draft | 36 | Saporito, Thiago (2119) | Lost 0-2 | -111704 |
| top | average opponent: 1656record: 7-5 | new rating: 1704 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1671 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 280 | Nakamura, Taro (1381) | Won 2-0 | +121683 |
| 2modern | 106 | Okada, Hajime (1384) | Won 2-1 | +131696 |
| 3modern | 113 | Kusadani, Takehiko (1654) | Lost 0-2 | -191677 |
| 4modern | 670 | Yamawaki, Satoru (1486) | Lost 0-2 | -211656 |
| 5modern | 821 | Nakamura, Yuki 6139 (1539) | Lost 0-2 | -201636 |
| 6modern | 925 | Kondo, Go (1468) | Won 2-1 | +151651 |
| 7modern | 703 | Maruno, Takaaki (1520) | Won 2-0 | +151666 |
| 8modern | 725 | Bushisue, Hidehiro (1512) | Won 2-0 | +161682 |
| 9modern | 313 | Kunisada, Hayato (1535) | Won 2-0 | +151697 |
| 10modern | 220 | Kouta, Hayakawa (1558) | Lost 0-2 | -211676 |
| top | average opponent: 1504record: 6-4 | new rating: 1676 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1600 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 800 | Hata, Hirotaka (1617) | Lost 1-2 | -171583 |
| 2sealed | 761 | Kotani, Sunao (1372) | Won 2-0 | +141597 |
| 3sealed | 903 | Hara, Hiroyuki (1502) | Won 2-0 | +161613 |
| 4sealed | 445 | Ono, Ikumi (1458) | Won 2-0 | +151628 |
| 5sealed | 194 | Shinomiya, Yusuke (1468) | Lost 0-2 | -211607 |
| 6sealed | 536 | Fukumoto, Nobuhiro (1453) | Won 2-0 | +161623 |
| 7sealed | 404 | Yasuo, Matui (1541) | Won 2-1 | +161639 |
| 8sealed | 169 | Shibayama, Hayato (1431) | Won 2-1 | +141653 |
| 9sealed | 203 | Sugimura, Yoshiyasu (1682) | Lost 1-2 | -171636 |
| 10draft | 91 | Harada, Masao (1610) | Won 2-1 | +181654 |
| 11draft | 233 | Koga, Tomohiro (1577) | Won 2-0 | +161670 |
| 12draft | 169 | Masuda, Jyunya (1611) | Won 2-1 | +171687 |
| 13draft | 177 | Katayama, Koujun (1553) | Won 2-1 | +161703 |
| 14draft | 272 | Keller, Thomas (1710) | Lost 1-2 | -181685 |
| 15draft | 172 | Shigehara, Toshinori (1900) | Lost 1-2 | -141671 |
| top | average opponent: 1566record: 10-5 | new rating: 1671 | ||
| Grand Prix Vancouver 2014 (THS standard) | starting rating: 1624 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 223 | Kwok, Ellis (1664) | Lost 0-2 | -171607 |
| 2standard | 352 | Grann, Fayth (1411) | Won 2-0 | +141621 |
| 3standard | 335 | Haggstrom, Eric (1466) | Won 2-1 | +161637 |
| 4standard | 228 | Huteson, Tom (1745) | Lost 0-2 | -161621 |
| 5standard | 292 | MacMillan, Dan (1500) | Lost 1-2 | -211600 |
| top | average opponent: 1557record: 2-3 | new rating: 1600 | ||
| Grand Prix Portland 2013 (modern) | starting rating: 1659 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 148 | Lopez, Angel (1484) | Lost 0-2 | -221637 |
| 2modern | 357 | Clancy, Paul J (1455) | Won 2-1 | +151652 |
| 3modern | 293 | Rock, Kenneth (1499) | Lost 1-2 | -211631 |
| 4modern | 417 | Gilbert, Tyson (1448) | Won 2-0 | +151646 |
| 5modern | 281 | Williams, Aaron M (1434) | Lost 0-2 | -221624 |
| top | average opponent: 1464record: 2-3 | new rating: 1624 | ||
| Grand Prix Vancouver 2012 (AVR limited) | starting rating: 1620 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 273 | Lundstrom, Kyle (1500) | Won 2-0 | +151635 |
| 2sealed | 15 | Leclair, Oliver (1517) | Lost 0-2 | -201615 |
| 3sealed | 135 | Genovese, Tony (1485) | Won 2-0 | +161631 |
| 4sealed | 125 | Yee, Ted (1516) | Won 2-0 | +161647 |
| 5sealed | 91 | Zafra, Marcel Angelo (1720) | Won 2-1 | +191666 |
| 6sealed | 98 | Erickson, Kyle (1552) | Lost 0-2 | -201646 |
| 7sealed | 113 | Muir, Brandon (1485) | Won 2-1 | +151661 |
| 8sealed | 91 | Yeung, Tim (1540) | Won 2-0 | +161677 |
| 9sealed | 70 | Watson, Garrett (1656) | Lost 1-2 | -181659 |
| top | average opponent: 1552record: 6-3 | new rating: 1659 | ||
| Grand Prix Seattle-Tacoma 2012 (DKA limited) | starting rating: 1633 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 27 | MCCOMBER, CHRIS (1500) | Won 2-0 | +161649 |
| 2sealed | 207 | deChatonnayree, Erik T (1518) | Lost 0-2 | -201629 |
| 3sealed | 355 | Ringue, Melvin (1482) | Won 2-0 | +151644 |
| 4sealed | 278 | Adair, Zach (1493) | Lost 1-2 | -211623 |
| 5sealed | 405 | Woods, Chris (1548) | Won 2-1 | +171640 |
| 6sealed | 219 | Kolb, Jon (1518) | Lost 1-2 | -201620 |
| top | average opponent: 1510record: 3-3 | new rating: 1620 | ||
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 52 | Beal, Jeremy (1500) | Won 2-1 | +181518 |
| 2sealed | 294 | Jansen, Adam (1500) | Won 2-1 | +181536 |
| 3sealed | 85 | Toelken, Austin (1616) | Won 2-0 | +191555 |
| 4sealed | 97 | Wu, Jia (1741) | Lost 0-2 | -151540 |
| 5sealed | 96 | Clay, Ellis (1678) | Won 2-1 | +211561 |
| 6sealed | 50 | Lambert, Kevin (1510) | Won 2-1 | +171578 |
| 7sealed | 100 | Bailey, Benjamin (1594) | Lost 1-2 | -181560 |
| 8sealed | 175 | Edwards, Terry (1558) | Won 2-0 | +181578 |
| 9sealed | 53 | Sperling, Matthew (1991) | Won 2-0 | +251603 |
| 10sealed | 25 | Young, Nick w (1641) | Won 2-0 | +191622 |
| 11draft | 46 | Cooper, Caleb D (1625) | Lost 1-2 | -181604 |
| 12draft | 37 | Paulello, Tristan (1580) | Won 2-0 | +181622 |
| 13draft | 66 | Munyer, Shane (1632) | Lost 1-2 | -181604 |
| 14draft | 48 | Black, Samuel (1861) | Won 2-0 | +221626 |
| 15draft | 6 | Rietzl, Paul (2025) | Lost 0-2 | -111615 |
| 16draft | 45 | Braun, Andrew (1615) | Won 2-0 | +181633 |
| top | average opponent: 1667record: 11-5 | new rating: 1633 | ||