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config.yml.default
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token: "xxxxxxxxxxxxxxxxxxxxxx" # Lichess OAuth2 Token.
url: "https://lichess.org/" # Lichess base URL.
engine: # Engine settings.
dir: "./engines/" # Directory containing the engine. This can be an absolute path or one relative to lichess-bot/.
name: "engine_name" # Binary name of the engine to use.
# interpreter: "java"
# interpreter_options:
# - "-jar"
working_dir: "" # Directory where the chess engine will read and write files. If blank or missing, the current directory is used.
# NOTE: If working_dir is set, the engine will look for files and directories relative to this directory, not where lichess-bot was launched. Absolute paths are unaffected.
protocol: "uci" # "uci", "xboard" or "homemade"
ponder: true # Think on opponent's time.
polyglot:
enabled: false # Activate polyglot book.
book:
standard: # List of book file paths for variant standard.
- engines/book1.bin
- engines/book2.bin
# atomic: # List of book file paths for variant atomic.
# - engines/atomicbook1.bin
# - engines/atomicbook2.bin
# etc.
# Use the same pattern for 'chess960', 'giveaway' (antichess), 'crazyhouse', 'horde', 'kingofthehill', 'racingkings' and '3check' as well.
min_weight: 1 # Does not select moves with weight below min_weight (min 0, max: 65535).
selection: "weighted_random" # Move selection is one of "weighted_random", "uniform_random" or "best_move" (but not below the min_weight in the 2nd and 3rd case).
max_depth: 20 # How many moves from the start to take from the book.
draw_or_resign:
resign_enabled: false # Whether or not the bot should resign.
resign_score: -1000 # If the score is less than or equal to this value, the bot resigns (in cp).
resign_for_egtb_minus_two: true # If true the bot will resign in positions where the online_egtb returns a wdl of -2.
resign_moves: 3 # How many moves in a row the score has to be below the resign value.
offer_draw_enabled: true # Whether or not the bot should offer/accept draw.
offer_draw_score: 0 # If the absolute value of the score is less than or equal to this value, the bot offers/accepts draw (in cp).
offer_draw_for_egtb_zero: true # If true the bot will offer/accept draw in positions where the online_egtb returns a wdl of 0.
offer_draw_moves: 10 # How many moves in a row the absolute value of the score has to be below the draw value.
offer_draw_pieces: 10 # Only if the pieces on board are less than or equal to this value, the bot offers/accepts draw.
online_moves:
max_out_of_book_moves: 10 # Stop using online opening books after they don't have a move for 'max_out_of_book_moves' positions. Doesn't apply to the online endgame tablebases.
max_retries: 2 # The maximum amount of retries when getting an online move.
# max_depth: 10 # How many moves from the start to take from online books. Default is no limit.
chessdb_book:
enabled: false # Whether or not to use chessdb book.
min_time: 20 # Minimum time (in seconds) to use chessdb book.
move_quality: "good" # One of "all", "good", "best".
min_depth: 20 # Only for move_quality: "best".
lichess_cloud_analysis:
enabled: false # Whether or not to use lichess cloud analysis.
min_time: 20 # Minimum time (in seconds) the bot must have to use cloud analysis.
move_quality: "best" # One of "good", "best".
max_score_difference: 50 # Only for move_quality: "good". The maximum score difference (in cp) between the best move and the other moves.
min_depth: 20
min_knodes: 0
lichess_opening_explorer:
enabled: false
min_time: 20
source: "masters" # One of "lichess", "masters", "player"
player_name: "" # The lichess username. Leave empty for the bot's username to be used. Used only when source is "player".
sort: "winrate" # One of "winrate", "games_played"
min_games: 10 # Minimum number of times a move must have been played to be chosen.
online_egtb:
enabled: false # Whether or not to enable online endgame tablebases.
min_time: 20 # Minimum time (in seconds) the bot must have to use online EGTBs.
max_pieces: 7 # Maximum number of pieces on the board to use endgame tablebases.
source: "lichess" # One of "lichess", "chessdb".
move_quality: "best" # One of "best" or "suggest" (it takes all the moves with the same WDL and tells the engine to only consider these; will move instantly if there is only 1 "good" move).
lichess_bot_tbs: # The tablebases list here will be read by lichess-bot, not the engine.
syzygy:
enabled: false # Whether or not to use local syzygy endgame tablebases.
paths: # Paths to Syzygy endgame tablebases.
- "engines/syzygy"
max_pieces: 7 # Maximum number of pieces in the endgame tablebase.
move_quality: "best" # One of "best" or "suggest" (it takes all the moves with the same WDL and tells the engine to only consider these; will move instantly if there is only 1 "good" move).
gaviota:
enabled: false # Whether or not to use local gaviota endgame tablebases.
paths:
- "engines/gaviota"
max_pieces: 5
min_dtm_to_consider_as_wdl_1: 120 # The minimum DTM to consider as syzygy WDL=1/-1. Set to 100 to disable.
move_quality: "best" # One of "best" or "suggest" (it takes all the moves with the same WDL and tells the engine to only consider these; will move instantly if there is only 1 "good" move).
# engine_options: # Any custom command line params to pass to the engine.
# cpuct: 3.1
homemade_options:
# Hash: 256
uci_options: # Arbitrary UCI options passed to the engine.
Move Overhead: 100 # Increase if your bot flags games too often.
Threads: 4 # Max CPU threads the engine can use.
Hash: 512 # Max memory (in megabytes) the engine can allocate.
SyzygyPath: "./syzygy/" # Paths to Syzygy endgame tablebases that the engine reads.
UCI_ShowWDL: true # Show the chance of the engine winning.
# go_commands: # Additional options to pass to the UCI go command.
# nodes: 1 # Search so many nodes only.
# depth: 5 # Search depth ply only.
# movetime: 1000 # Integer. Search exactly movetime milliseconds.
# xboard_options: # Arbitrary XBoard options passed to the engine.
# cores: "4"
# memory: "4096"
# egtpath: # Directory containing egtb (endgame tablabases), relative to this project. For 'xboard' engines.
# gaviota: "Gaviota path"
# nalimov: "Nalimov Path"
# scorpio: "Scorpio Path"
# syzygy: "Syzygy Path"
# go_commands: # Additional options to pass to the XBoard go command.
# depth: 5 # Search depth ply only.
# Do note that the go commands 'movetime' and 'nodes' are invalid and may cause bad time management for XBoard engines.
silence_stderr: false # Some engines (yes you, Leela) are very noisy.
abort_time: 30 # Time to abort a game in seconds when there is no activity.
fake_think_time: false # Artificially slow down the bot to pretend like it's thinking.
rate_limiting_delay: 0 # Time (in ms) to delay after sending a move to prevent "Too Many Requests" errors.
move_overhead: 2000 # Increase if your bot flags games too often.
max_takebacks_accepted: 0 # The number of times to allow an opponent to take back a move in a game.
quit_after_all_games_finish: false # If set to true, then pressing Ctrl-C to quit will only stop lichess-bot after all current games have finished.
correspondence:
move_time: 60 # Time in seconds to search in correspondence games.
checkin_period: 300 # How often to check for opponent moves in correspondence games after disconnecting.
disconnect_time: 150 # Time before disconnecting from a correspondence game.
ponder: false # Ponder in correspondence games the bot is connected to.
challenge: # Incoming challenges.
concurrency: 1 # Number of games to play simultaneously.
sort_by: "best" # Possible values: "best" and "first".
preference: "none" # Possible values: "none", "human", "bot".
accept_bot: true # Accepts challenges coming from other bots.
only_bot: false # Accept challenges by bots only.
max_increment: 20 # Maximum amount of increment to accept a challenge in seconds. The max is 180. Set to 0 for no increment.
min_increment: 0 # Minimum amount of increment to accept a challenge in seconds.
max_base: 1800 # Maximum amount of base time to accept a challenge in seconds. The max is 10800 (3 hours).
min_base: 0 # Minimum amount of base time to accept a challenge in seconds.
max_days: 14 # Maximum number of days per move to accept a challenge for a correspondence game.
# Unlimited games can be accepted by removing this field or specifying .inf
min_days: 1 # Minimum number of days per move to accept a challenge for a correspondence game.
variants: # Chess variants to accept (https://lichess.org/variant).
- standard
# - fromPosition
# - antichess
# - atomic
# - chess960
# - crazyhouse
# - horde
# - kingOfTheHill
# - racingKings
# - threeCheck
time_controls: # Time controls to accept (bots are not allowed to play ultraBullet).
- bullet
- blitz
- rapid
- classical
# - correspondence
modes: # Game modes to accept.
- casual # Unrated games.
- rated # Rated games - must comment if the engine doesn't try to win.
# block_list: # List of users from which the challenges are always declined.
# - user1
# - user2
# allow_list: # List of users from which challenges are exclusively accepted, all others being declined. If empty, challenges from all users may be accepted.
# - user3
# - user4
# recent_bot_challenge_age: 60 # Maximum age of a bot challenge to be considered recent in seconds
# max_recent_bot_challenges: 2 # Maximum number of recent challenges that can be accepted from the same bot
bullet_requires_increment: false # Require that bullet game challenges from bots have a non-zero increment
max_simultaneous_games_per_user: 5 # Maximum number of simultaneous games with the same user
greeting:
# Optional substitution keywords (include curly braces):
# {opponent} to insert opponent's name
# {me} to insert bot's name
# Any other words in curly braces will be removed.
hello: "Hi! I'm {me}. Good luck! Type !help for a list of commands I can respond to." # Message to send to opponent chat at the start of a game
goodbye: "Good game!" # Message to send to opponent chat at the end of a game
hello_spectators: "Hi! I'm {me}. Type !help for a list of commands I can respond to." # Message to send to spectator chat at the start of a game
goodbye_spectators: "Thanks for watching!" # Message to send to spectator chat at the end of a game
# pgn_directory: "game_records" # A directory where PGN-format records of the bot's games are kept
# pgn_file_grouping: "game" # How to group games into files. Options are "game", "opponent", and "all"
# "game" (default) - every game is written to a different file named "{White name} vs. {Black name} - {lichess game ID}.pgn"
# "opponent" - every game with a given opponent is written to a file named "{Bot name} games vs. {Opponent name}.pgn"
# "all" - every game is written to a single file named "{Bot name} games.pgn"
matchmaking:
allow_matchmaking: false # Set it to 'true' to challenge other bots.
allow_during_games: false # Set it to 'true' to create challenges during long games.
challenge_variant: "random" # If set to 'random', the bot will choose one variant from the variants enabled in 'challenge.variants'.
challenge_timeout: 30 # Create a challenge after being idle for 'challenge_timeout' minutes. The minimum is 1 minute.
challenge_initial_time: # Initial time in seconds of the challenge (to be chosen at random).
- 60
- 180
challenge_increment: # Increment in seconds of the challenge (to be chosen at random).
- 1
- 2
# challenge_days: # Days for correspondence challenge (to be chosen at random).
# - 1
# - 2
# opponent_min_rating: 600 # Opponents rating should be above this value (600 is the minimum rating in lichess).
# opponent_max_rating: 4000 # Opponents rating should be below this value (4000 is the maximum rating in lichess).
opponent_rating_difference: 300 # The maximum difference in rating between the bot's rating and opponent's rating.
rating_preference: "none" # One of "none", "high", "low".
opponent_allow_tos_violation: false # Set to 'true' to allow challenging bots that violated the Lichess Terms of Service.
challenge_mode: "random" # Set it to the mode in which challenges are sent. Possible options are 'casual', 'rated' and 'random'.
challenge_filter: none # If a bot declines a challenge, do not issue a similar challenge to that bot. Possible options are 'none', 'coarse', and 'fine'.
# block_list: # The list of bots that will not be challenged
# - user1
# - user2
include_challenge_block_list: false # Do not challenge bots in the challenge: block_list in addition to the matchmaking block list.
# overrides: # List of overrides for the matchmaking specifications above. When a challenge is created, either the default specification above or one of the overrides will be randomly chosen.
# bullet_only_horde: # Name of the override. Can be anything as long as each override has a unique name ("bullet_only_horde" and "easy_chess960" in these examples).
# challenge_variant: "horde" # List of options to override. Only the options mentioned will change when making the challenge. The rest will follow the default matchmaking options above.
# challenge_initial_time:
# - 1
# - 2
# challenge_increment:
# - 0
# - 1
#
# easy_chess960:
# challenge_variant: "chess960"
# opponent_min_rating: 400
# opponent_max_rating: 1200
# opponent_rating_difference:
# challenge_mode: casual
#
# no_pressure_correspondence:
# challenge_initial_time:
# challenge_increment:
# challenge_days:
# - 2
# - 3
# challenge_mode: casual
#
# The following configurations cannot be overridden: allow_matchmaking, challenge_timeout, challenge_filter and block_list.