| # | Name | Elo | Total | Country | Rank |
| 601. | blacky_263 | 2271 | 135 | Amateur | |
| 602. | blauer reiter | 2555 | 117151 |
|
Grandmaster |
| 603. | blessymuk | 2153 | 478 | Talent | |
| 604. | bleys | 1743 | 11 | - | |
| 605. | blinco | 1740 | 13 |
|
- |
| 606. | blindschleiche | 2141 | 114 |
|
Amateur |
| 607. | blitzandblunders | 2154 | 114 | Amateur | |
| 608. | blitzgameofchess | 2217 | 119 | Amateur | |
| 609. | blitzkr | 1889 | 46 | Beginner | |
| 610. | blitzman | 2516 | 1846 |
|
Club Champion |
| 611. | blitzthilo | 1899 | 31 |
|
Beginner |
| 612. | blonder hans | 1939 | 99 | Amateur | |
| 613. | bloombs | 1879 | 21 | Beginner | |
| 614. | bluedoc23 | 2253 | 264 | - | |
| 615. | bluelion | 2303 | 37366 | FIDE Master | |
| 616. | bluenote79 | 1603 | 6 | - | |
| 617. | bluesoniq | 2091 | 3521 |
|
Club Champion |
| 618. | bluku | 2271 | 149 | Amateur | |
| 619. | blumenstiel | 2957 | 4390 | World Champion | |
| 620. | boardmember | 2392 | 30018 |
|
FIDE Master |
| 621. | bobblomquist | 2089 | 9768 | Master Candidate | |
| 622. | bobby171199 | 2314 | 492 | Strong Amateur | |
| 623. | bobby62 | 1853 | 30533 | Experienced Player | |
| 624. | bobbyfischere41 | 2222 | 100 | Amateur | |
| 625. | bobbyhopes | 2438 | 851 | Shooting Star |
| # | Name | Elo | Total | Country | Rank |
| 626. | bobc | 2311 | 8685 | FIDE Master | |
| 627. | bobopat | 2118 | 179 | Strong Amateur | |
| 628. | boby mooser | 2218 | 2232 | Top Player | |
| 629. | boddhisativa | 1993 | 3164 | Talent | |
| 630. | boera3689 | 2324 | 252 |
|
- |
| 631. | bogdanmadan | 2303 | 171 | Amateur | |
| 632. | bohenriksen | 2560 | 30911 | Grandmaster | |
| 633. | bohus | 2616 | 2158 | Top Player | |
| 634. | bokang motsamai | 2108 | 107 | Amateur | |
| 635. | bolan | 2414 | 48222 |
|
Internat. Master |
| 636. | bolllothar | 2094 | 4438 | Master Candidate | |
| 637. | bolzano_w | 1669 | 15 | - | |
| 638. | bonetti | 2164 | 9254 | Master Candidate | |
| 639. | bonghits | 2199 | 2594 | - | |
| 640. | booker25800 | 2049 | 274 | Apprentice | |
| 641. | bordok | 2150 | 98 |
|
Amateur |
| 642. | borisbv | 2882 | 1784 |
|
Shooting Star |
| 643. | borke39 | 2012 | 10034 | Top Player | |
| 644. | borna123 | 2122 | 120 | Strong Amateur | |
| 645. | bosluk00 | 1863 | 24 | Beginner | |
| 646. | bostizar | 2320 | 9463 | FIDE Master | |
| 647. | bot26 | 1858 | 34 | Beginner | |
| 648. | bouboujeje | 2051 | 88 | - | |
| 649. | boulanger | 2072 | 1436 | Shooting Star | |
| 650. | bour | 2255 | 746 | Player |