| # | Name | Elo | Total | Country | Rank |
| 2651. | siefert | 2136 | 62387 | Experienced Player | |
| 2652. | siegbert | 2509 | 9342 |
|
Internat. Master |
| 2653. | siegmar001 | 2092 | 255 | Beginner | |
| 2654. | sigurdur eiriksson | 1640 | 3 | - | |
| 2655. | siimkanep | 2308 | 128 | Beginner | |
| 2656. | silbertaler | 2146 | 913 |
|
Shooting Star |
| 2657. | silentday | 2310 | 923 |
|
Shooting Star |
| 2658. | siluur1 | 1786 | 1118 | Strong Player | |
| 2659. | simart_19 | 2207 | 148 | Strong Amateur | |
| 2660. | simonanzinger | 2256 | 1193 | Shooting Star | |
| 2661. | sir alfred | 2388 | 501 | Apprentice | |
| 2662. | sirlocks | 2079 | 307 | Strong Apprentice | |
| 2663. | sirous1970 | 1828 | 26 | Beginner | |
| 2664. | siva2013 | 2105 | 128 | Strong Amateur | |
| 2665. | sivamurugan | 2411 | 1335 | Shooting Star | |
| 2666. | skakspiller2016 | 2329 | 23586 | Internat. Master | |
| 2667. | skebi | 2203 | 38082 | FIDE Master | |
| 2668. | ski60-rathke | 2002 | 140 | Strong Amateur | |
| 2669. | skill-less | 2525 | 6685 |
|
Grandmaster |
| 2670. | skipdever | 2232 | 10034 | FIDE Master | |
| 2671. | skomodo | 2640 | 5761 | Grandmaster | |
| 2672. | skyerwin | 2399 | 67370 | Internat. Master | |
| 2673. | skyfall4711 | 1828 | 157 | - | |
| 2674. | skyquake11 | 2186 | 6038 | Master Candidate | |
| 2675. | slakibuki | 2477 | 34122 |
|
Internat. Master |
| # | Name | Elo | Total | Country | Rank |
| 2676. | slatar | 1981 | 172 |
|
Strong Amateur |
| 2677. | slingos | 2215 | 531 |
|
Talent |
| 2678. | slugger | 2347 | 88350 | FIDE Master | |
| 2679. | sly111 | 2236 | 5159 | Master Candidate | |
| 2680. | smikush | 2171 | 182 | Strong Amateur | |
| 2681. | smog | 2433 | 6362 |
|
Internat. Master |
| 2682. | sneohy | 1859 | 129 | Strong Amateur | |
| 2683. | snofru | 2548 | 338237 | Internat. Master | |
| 2684. | soberphobia | 2353 | 3012 |
|
FIDE Master |
| 2685. | sogel | 2177 | 3064 |
|
Top Player |
| 2686. | sohuphidi | 2628 | 9144 | Grandmaster | |
| 2687. | soler-b | 2552 | 8365 | Internat. Master | |
| 2688. | solide | 2352 | 13808 | FIDE Master | |
| 2689. | solodiver | 2219 | 469 | Talent | |
| 2690. | somaclava | 2497 | 59804 | Internat. Master | |
| 2691. | soporifico | 2100 | 210 | Apprentice | |
| 2692. | soraisammoni | 2389 | 739 | Shooting Star | |
| 2693. | soretti | 2201 | 227 | Apprentice | |
| 2694. | soryan60 | 2422 | 9058 | Internat. Master | |
| 2695. | soso123 | 2337 | 30693 |
|
FIDE Master |
| 2696. | sotc16 | 2051 | 183 | Strong Amateur | |
| 2697. | sothulrich | 1818 | 24 | Beginner | |
| 2698. | space invader | 1669 | 2 |
|
- |
| 2699. | spacerace1960 | 2285 | 6938 | Master Candidate | |
| 2700. | spg-1178prep | 2258 | 2785 |
|
Master Candidate |