Board   E4EC
Find the details about playing chess is the club
  Chess Server Facilities

The table below shows detailed information what is supported in the club and what is not.

Feature Supported? Remark
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
Using multiple email addresses Yes
Changing email address Yes
Digest mode Yes To get only one or two messages per day.
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.
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
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
Studying game analyses Yes
Submitting game analyses Yes
Users manual Yes
Frequently Asked Questions Yes
Guidance for new players Yes
Digitally sign outgoing messages Yes
Digital signature verification on incoming messages Yes Messages with missing or invalid signature can be rejected
Submitting chess problems Yes
Submitting chess problems using FEN line Yes
Solving chess problems Yes

*: This rule is more complex than many think. I've summarized its aspects in the page. The tight interpretation of this rule is supported by the server, this is the first four cases in that page.

ELO Rating

Muscler An ELO rating is the result of statistical calculations designed to measure the playing strength of players. These methods were developed by Arpad Elo and are named after him. The ELO system is in almost universal use and has been further refined by others, notably Glicko, but is still named after its creator.

In devising the ELO scale, some premises were used that are worthy of note. It was decided that a rating of 2000 would be the equivalent to scoring 50% in a US Open Championship. It was also decided that a player's rating would never be negative.

Importantly, the standard deviation was fixed at 200 points. This means that if a player's true strength is 1500, he will score around 68% of his results within the range of 1400 to 1600 (as measured by performance formulae). Another result of fixing the standard deviation at 200 points is that it also defines playing categories. For example, most International Masters and Grandmasters are in the 2400 - 2600 category, most national masters in the 2200 - 2400 category. Those in the 2000 - 2200 category are called Experts, or Candidate Masters.
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