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  2. Lichess - Wikipedia

    en.wikipedia.org/wiki/Lichess

    Lichess (/ ˈ l iː tʃ ɛ s /; LEE-ches) [3] [4] is a free and open-source Internet chess server run by a non-profit organization of the same name. Users of the site can play online chess anonymously and optionally register an account to play rated games .

  3. Endgame tablebase - Wikipedia

    en.wikipedia.org/wiki/Endgame_tablebase

    Their total size is about 140 TB. [3] They were attacked by a ransomware in 2021, and have been offline since then. [27] Ronald de Man and Bojun Guo, who generated the seven man DTZ tablebase called the Syzygy tablebase in 2018. They were able to reduce the size of seven-man tablebases from 140 TB to 18.4 TB. [4]

  4. Glicko rating system - Wikipedia

    en.wikipedia.org/wiki/Glicko_rating_system

    Mark Glickman created the Glicko rating system in 1995 as an improvement on the Elo rating system. [1]Both the Glicko and Glicko-2 rating systems are under public domain and have been implemented on game servers online like Counter-Strike: Global Offensive, Team Fortress 2, [2] Dota 2, [3] Guild Wars 2, [4] Splatoon 2, [5] Online-go.com, [6] Lichess and chess.com.

  5. List of chess variants - Wikipedia

    en.wikipedia.org/wiki/List_of_chess_variants

    Polgar reform chess [multivariant]: In his book Reform-Chess (1997), László Polgár proposed several variants played on board of size 5×8, 6×8, 8×6, or 9×6. [12] The initial piece setup is determined by players in the same way as in Benko's Pre-chess. There are special rules for castling depending on the board. Polgár recommended these ...

  6. Staunton chess set - Wikipedia

    en.wikipedia.org/wiki/Staunton_chess_set

    Pieces representing human characters (the king, queen, bishop, and pawn) have a flat disk separating the body from the head design, which is known as a collar. A modified Staunton chess set, described in the FIDE Laws of Chess, [13] is used for the blind and visually impaired. In such a set, the black pieces are differentiated from the white ...

  7. Wikipedia:WikiProject Chess - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:WikiProject_Chess

    I am interested in the chess history and chess openings and techniques. In terms of ratings I play mostly on chess.com and have a 1800+ rapid rating, 1700+ blitz rating and 1750+ bullet rating, although o sometimes play on lichess for blitz and bullet time controls and I am around 1900 for bullet and 2100 for Blitz.

  8. Chess annotation symbols - Wikipedia

    en.wikipedia.org/wiki/Chess_annotation_symbols

    1.1.7 Three or more character combinations. 1.1.8 Parentheses. 1.2 Alternative uses. ... On certain Internet chess servers, such as Chess.com and Lichess, this kind ...

  9. Portable Game Notation - Wikipedia

    en.wikipedia.org/wiki/Portable_Game_Notation

    The entries in the HTML column are named HTML entities for representing the symbol or character; the Unicode numeric value can always be used where a specific entity does not exist. For example, the left right double arrow ($239) can be represented as either Unicode decimal ⇔ (⇔) or Unicode hexadecimal ⇔ (⇔) or HTML ⇔ (⇔).