| Feature |
Supported? |
Remark |
| Rules |
| En passant captures, castling, promotion |
Yes |
|
| Draw offer |
Yes |
FIDE Laws of Chess 9.1 |
| 3 boards repetition rule |
Yes |
FIDE Laws of Chess 9.2 |
| 50 moves rule |
Yes |
FIDE Laws of Chess 9.3 |
| Insufficient mating material rule |
Yes* |
FIDE Laws of Chess 9.6 |
| Validity check of moves, rejecting invalid moves |
Yes |
|
| Automatic recognition of checkmate and stalemate |
Yes |
|
| Resigning a game |
Yes |
|
| Formats, notations |
| Plain text message format |
Yes |
|
| Html (graphical) message format |
Yes |
|
| Game diagram as attachment |
No |
Use html message format instead |
| Short (or standard) algebraic notation |
Yes |
E.g. Nxc3+, O-O, etc. |
| Long algebraic notation |
Yes |
E.g. a4-c4, a4c3+, a4xc4, etc. |
| Coordinate notation |
Yes |
E.g. a4c4, a4c3, a4c4, etc. |
| Correspondence notation |
Yes |
E.g. 1434, 1433, 17281, etc. |
| PGN support |
Yes |
|
| Downloading games in PGN format |
Yes |
|
| Starting, playing and finishing games |
| Challenging any player |
Yes |
|
| Refusing any challenge |
Yes |
|
| Rated games |
Yes |
|
|
Friendly games |
Yes |
|
| Choosing color |
Yes |
By the challenger |
| Choosing time control |
Yes |
By the challenger |
| Simultaneous games |
Yes |
16 games initially, raises by 2 with every normally finished game |
| Requesting pairing |
Yes |
Automatic, according to rating, adjustable |
| Starting from predefined setup using move list |
Yes |
|
| Starting from predefined setup using FEN line |
Yes |
|
| Conditional moves |
Yes |
E.g. IF c5 THEN Nxa2 |
| Claiming result in broken games |
Yes |
Winning, draw, losing or deleting |
| Archiving games |
| Saving finished games for future access |
Yes |
|
| Email |
| Using multiple email addresses |
Yes |
|
| Changing email address |
Yes |
|
| Digest mode |
Yes |
To get only one or two messages per day. |
| Information |
| Rating calculation |
Yes |
Implemented by the Glicko method. |
| Players list, ratings list |
Yes |
|
| Newsletter |
Yes |
|
| Country codes |
Yes |
ISO 3166-1 |
| Age and gender, real name, other textual information |
Yes |
|
| Uploading photo |
Yes |
|
| Requesting last contact times |
Yes |
|
| Calculating average move times |
Yes |
|
| Calculating most active time in a day |
Yes |
|
| Game logs |
Yes |
Who when, what moved, etc. |
| Player logs |
Yes |
When you did something, what happened, etc. |
| Tournament logs |
Yes |
Entries, results, etc. |
| Communication |
| Giving out email addresses |
No |
Nor even planned |
| Sending messages to players |
Yes |
|
| Setting up spoken languages |
Yes |
ISO 639-2 |
| Sending messages to the opponent with moves, challenges, etc. |
Yes |
|
| Broadcast messages |
No |
Nor even planned |
| Ignoring players |
Yes |
|
| Discussion lists |
Yes |
|
| Forums |
Yes |
|
| Time controls |
| The 10/30, 10/40, 10/50 systems |
Yes |
|
| The 5+1 system |
Yes |
|
| Games without time control |
Yes |
|
| Other player defined time controls |
Not yet |
|
| Vacation availability |
Yes |
|
| Automatic vacation |
Yes |
|
|
Time forfeit |
Yes |
The innocent player wins |
| Reminders about late moves |
Yes |
Adjustable |
|
Tournaments |
| Public tournament games |
Yes |
All tournament games |
| Class based single round-robins |
Yes |
7 players |
| Swiss tournaments |
Not yet |
|
| KO tournaments |
Not yet |
|
| Open, rating independent tournaments |
Not yet |
|
| Tournaments for established players only |
Yes |
5 normally finished games needed to enter for tournaments |
| Invitation based official tournaments |
Yes |
|
| Downloading all tournament games in PGN |
Yes |
|
| Analyses |
| Studying game analyses |
Yes |
|
| Submitting game analyses |
Yes |
|
| Help |
| Users manual |
Yes |
|
| Frequently Asked Questions |
Yes |
|
| Guidance for new players |
Yes |
|
| Security |
| Digitally sign outgoing messages |
Yes |
|
| Digital signature verification on incoming messages |
Yes |
Messages with missing or invalid signature can be rejected |
| Other |
| Submitting chess problems |
Yes |
|
| Submitting chess problems using FEN line |
Yes |
|
| Solving chess problems |
Yes |
|
An ELO rating is the result of statistical calculations designed to measure the playing strength of players. These methods were developed by