Koon, David
Current rating: 1709 (#5990)
Record: 58-47
| Grand Prix Milwaukee 2018 (GRN standard) | starting rating: 1730 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 68 | Helsten, Dan (1482) | Lost 0-2 | -221708 |
| 4standard | 171 | Nytes, Ian (1498) | Won 2-0 | +141722 |
| 5standard | 80 | Neville, John (1534) | Won 2-1 | +151737 |
| 6standard | 98 | Beasley, Shanice (1569) | Lost 1-2 | -211716 |
| 7standard | 140 | Habel, Jonathon (1575) | Lost 1-2 | -211695 |
| 8standard | 272 | Taylor, Heather (1429) | Won 1-0 | +141709 |
| top | average opponent: 1515record: 3-3 | new rating: 1709 | ||
| Grand Prix Memphis 2018 (RIX standard) | starting rating: 1649 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 80 | Williams, Travis (1434) | Won 2-0 | +141663 |
| 4standard | 61 | Deerman, Jason (1552) | Won 2-1 | +161679 |
| 5standard | 45 | Bose, Arjune (1660) | Won 2-1 | +181697 |
| 6standard | 3 | Maeba, Hideaki (1862) | Won 2-0 | +211718 |
| 7standard | 1 | Baumeister, Corey (2141) | Lost 0-2 | -111707 |
| 8standard | 31 | Wijaya, Vidianto (2082) | Won 2-0 | +251732 |
| 9standard | 21 | Rolf, John (2110) | Lost 0-2 | -121720 |
| 10standard | 22 | Zurawski, Alex (1718) | Lost 0-2 | -181702 |
| 11standard | 50 | Nass, Matthew (1977) | Won 2-1 | +231725 |
| 12standard | 61 | Pennachio, Joe (1717) | Won 2-1 | +181743 |
| 13standard | 36 | Sullivan, Cameron (1794) | Lost 0-2 | -171726 |
| 14standard | 59 | Snyder, Asa (1775) | Won 2-1 | +191745 |
| 15standard | 27 | Black, Samuel (1949) | Lost 0-2 | -151730 |
| top | average opponent: 1828record: 8-5 | new rating: 1730 | ||
| Grand Prix Indianapolis 2017 (HOU limited) | starting rating: 1671 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 86 | Clarke, Collin (1538) | Won 2-0 | +161687 |
| 4sealed | 119 | Linne, Mason (1798) | Lost 0-2 | -161671 |
| 5sealed | 152 | Molesch, Max (1914) | Lost 0-2 | -141657 |
| 6sealed | 265 | Cottongim, Luke (1519) | Lost 0-2 | -201637 |
| 7sealed | 332 | Cunningham, Brittany (1448) | Won 2-0 | +141651 |
| 8sealed | 252 | Sage, Nathan (1543) | Won 2-0 | +161667 |
| 9sealed | 185 | Ferraiuolo, Vincent (1654) | Lost 0-2 | -181649 |
| top | average opponent: 1631record: 3-4 | new rating: 1649 | ||
| Grand Prix Minneapolis 2017 (HOU standard) | starting rating: 1698 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 9 | Davila, David (1535) | Won 2-0 | +151713 |
| 4standard | 50 | Weiser, Daniel (1825) | Lost 1-2 | -161697 |
| 5standard | 109 | Carlson, Gwen (1533) | Won 2-0 | +151712 |
| 6standard | 126 | Pham, Phillip (1778) | Won 2-0 | +191731 |
| 7standard | 68 | Wells, John W (1717) | Lost 1-2 | -181713 |
| 8standard | 68 | Newman, Matt (1569) | Won 2-0 | +161729 |
| 9standard | 35 | Klenotic, Tom (1747) | Lost 1-2 | -181711 |
| 10standard | 607 | Choi, Jungje (1728) | Won 2-1 | +181729 |
| 11standard | 503 | Malowski, William (1608) | Lost 0-2 | -201709 |
| 12standard | 555 | Glover, Dalton (1558) | Lost 1-2 | -211688 |
| 13standard | 570 | Brumby, Gene (1634) | Lost 1-2 | -191669 |
| 14standard | 572 | Llodra, Juan Pablo (1755) | Won 2-1 | +201689 |
| 15standard | 552 | Booth, JT (1713) | Lost 0-2 | -181671 |
| top | average opponent: 1669record: 6-7 | new rating: 1671 | ||
| Grand Prix Richmond 2017 (AKH limited) | starting rating: 1633 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 42 | Miller, Jason A (1672) | Lost 1-2 | -181615 |
| 4sealed | 385 | Knapp, Zane (1563) | Won 2-0 | +171632 |
| 5sealed | 178 | Shenhar, Shahar (1833) | Lost 0-2 | -141618 |
| 6sealed | 262 | Unterman, Matthew (1447) | Won 2-1 | +151633 |
| 7sealed | 194 | Bogner, Ryan (1877) | Won 2-0 | +221655 |
| 8sealed | 240 | Baugh, Jacob (1777) | Won 2-0 | +211676 |
| 9sealed | 121 | Ma, Jesse (1644) | Won 2-0 | +171693 |
| 10draft | 838 | Buchner, Hans (1817) | Won 2-0 | +201713 |
| 11draft | 674 | Caserta, Michael (1625) | Lost 1-2 | -191694 |
| 12draft | 784 | Ortiz, Luis (1617) | Lost 0-2 | -201674 |
| 13draft | 628 | Shenhar, Shahar (1850) | Won 2-0 | +211695 |
| 14draft | 625 | Sullano, Andrew (1850) | Lost 1-2 | -151680 |
| 15draft | 625 | Borakove, Steven (1674) | Won 2-1 | +181698 |
| top | average opponent: 1711record: 8-5 | new rating: 1698 | ||
| Grand Prix Indianapolis 2016 (modern) | starting rating: 1634 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 309 | Carson, Erik (1816) | Lost 0-2 | -141620 |
| 4modern | 380 | Vanderjagt, Zachary (1541) | Won 2-1 | +161636 |
| 5modern | 150 | Graves, Robert (1757) | Lost 1-2 | -161620 |
| 6modern | 315 | Lunceford, Drew (1602) | Won 2-0 | +181638 |
| 7modern | 346 | Bodee, Roger (1642) | Won 2-0 | +181656 |
| 8modern | 183 | Lutes, Tyler (1515) | Won 2-0 | +151671 |
| 9modern | 176 | Battles, Brendan (1584) | Lost 1-2 | -191652 |
| 10modern | 1067 | Symmonds, Kelly (1586) | Lost 0-2 | -191633 |
| top | average opponent: 1630record: 4-4 | new rating: 1633 | ||
| Grand Prix Pittsburgh 2016 (SOI standard) | starting rating: 1644 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 10 | McVety, Max (1995) | Lost 0-2 | -121632 |
| 4standard | 345 | Forrest, Brad (1693) | Won 2-1 | +191651 |
| 5standard | 305 | Johnson, Gary (1519) | Lost 1-2 | -201631 |
| 6standard | 314 | Labutka, Adam (1590) | Won 2-0 | +171648 |
| 7standard | 139 | Musser, Dan (1985) | Won 2-0 | +241672 |
| 8standard | 132 | Tanner, Charles (1641) | Lost 0-2 | -181654 |
| 9standard | 233 | Page, Veronica (1579) | Lost 1-2 | -201634 |
| top | average opponent: 1714record: 3-4 | new rating: 1634 | ||
| Grand Prix Columbus 2016 (legacy) | starting rating: 1675 | |||
| round | table | opponent (rating) | result | Δrating |
| 3legacy | 68 | Slowikowski, James (1534) | Won 2-1 | +161691 |
| 4legacy | 148 | Wachtler, Jake (1523) | Lost 1-2 | -211670 |
| 5legacy | 160 | Santomassino, Joseph (1712) | Lost 0-2 | -181652 |
| 6legacy | 364 | Tian, David (1574) | Won 2-0 | +171669 |
| 7legacy | 356 | Borthwick, Matt (1520) | Won 2-0 | +151684 |
| 8legacy | 180 | Gallagher, Phillip (1615) | Lost 1-2 | -191665 |
| 9legacy | 274 | Mapson, Michael (1510) | Lost 1-2 | -211644 |
| top | average opponent: 1570record: 3-4 | new rating: 1644 | ||
| Grand Prix Charlotte 2016 (modern) | starting rating: 1584 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 326 | Flury, Julian Felix (1821) | Won 2-0 | +231607 |
| 4modern | 434 | Rolik, Tim (1542) | Won 2-1 | +161623 |
| 5modern | 15 | White, George (1507) | Won 2-0 | +161639 |
| 6modern | 359 | Poulin, Anthony (1561) | Won 2-0 | +171656 |
| 7modern | 27 | Rill, Eric (1781) | Won 2-1 | +201676 |
| 8modern | 17 | Hatfield, Cody (1597) | Lost 1-2 | -191657 |
| 9modern | 56 | Adinolfi, Vincent (1589) | Won 2-1 | +161673 |
| 10modern | 24 | Brennan, Corey (1591) | Lost 0-2 | -191654 |
| 11modern | 52 | Bowman, Adam (1711) | Won 2-0 | +191673 |
| 12modern | 56 | Allen, Evan (1602) | Won 2-1 | +171690 |
| 13modern | 12 | Rhoden, Matt (1649) | Lost 1-2 | -191671 |
| 14modern | 49 | Tobias, David (1823) | Won 2-0 | +211692 |
| 15modern | 16 | Shea, Michael (1769) | Lost 0-2 | -171675 |
| top | average opponent: 1657record: 9-4 | new rating: 1675 | ||
| Grand Prix Indianapolis 2015 (BFZ standard) | starting rating: 1530 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 178 | Honigmann, Joshua (1513) | Won 2-0 | +171547 |
| 2standard | 140 | Lillard, Mario (1542) | Won 2-0 | +181565 |
| 3standard | 30 | Jetha, David (1712) | Lost 0-2 | -151550 |
| 4standard | 319 | Higgins, Aaron (1432) | Won 2-0 | +161566 |
| 5standard | 178 | Passarelli, Hayden (1632) | Lost 0-2 | -171549 |
| 6standard | 188 | Banaszewski, Matthew (1523) | Lost 0-2 | -191530 |
| 7standard | 291 | Ranney, Chad (1502) | Won 2-1 | +181548 |
| 8standard | 201 | Moreno Miranda, German (1521) | Won 2-0 | +171565 |
| 9standard | 165 | Lambert, Dan (1620) | Won 0-0 | +191584 |
| top | average opponent: 1555record: 6-3 | new rating: 1584 | ||
| Grand Prix Cincinnati 2014 (BNG standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 117 | Rullman, Thad (1500) | Won 1-0 | +181518 |
| 2standard | 21 | Salinas, Conor (1583) | Lost 1-2 | -171501 |
| 3standard | 617 | Leden, Rebecca (1500) | Won 2-0 | +181519 |
| 4standard | 314 | Kandziolka, James (1621) | Won 2-0 | +201539 |
| 5standard | 211 | Boss, Allen (1536) | Lost 0-2 | -181521 |
| 6standard | 290 | Kirk, James (1522) | Won 2-1 | +181539 |
| 7standard | 317 | Shenhar, Shahar (1907) | Lost 0-2 | -121527 |
| 8standard | 272 | Smith, Kyle 1962 (1654) | Won 2-1 | +211548 |
| 9standard | 242 | Combs, Cam (1537) | Lost 0-2 | -181530 |
| top | average opponent: 1596record: 5-4 | new rating: 1530 | ||