New feature! Added Elo rating system!
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# Mastodon Chess
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Play with other fediverse users a Chess game! Mastodon Chess control games, players and boards and even it post, graphically, every move to both players!
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Mastodon Chess (mastochess) uses [python-chess](https://python-chess.readthedocs.io/en/latest/) library.
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Mastodon Chess uses Elo rating system to calculate the relative skill levels of fediverse players!
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### How to play:
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@ -100,3 +101,4 @@ Within Python Virtual Environment:
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05.12.2020 - New feature! Add panel stats.
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19.12.2020 - New feature! Now you can configure bot's language!
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19.12.2020 - New feature! Added french language!
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21.12.2020 - New feature! Added Elo rating system!
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@ -71,3 +71,4 @@ post_my_panel_str: panell (publica les estadístiques)
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locale_change_successfully: llengua canviada amb èxit a
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locale_not_changed: encara no és suportada :-(
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change_lang_str: conf ca (per a configurar el bot en català)
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panel_elo_rating_str: Elo
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@ -71,3 +71,4 @@ post_my_panel_str: panel (post player stats)
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locale_change_successfully: language sucessfully changed to
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locale_not_changed: is not supported yet :-(
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change_lang_str: conf en (to configure the bot in english)
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panel_elo_rating_str: Elo
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@ -71,3 +71,4 @@ post_my_panel_str: panel (publica el panel de datos)
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locale_change_successfully: idioma cambiado con éxito a
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locale_not_changed: no es soportado aún :-(
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change_lang_str: conf es (para configurar el bot en castellano)
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panel_elo_rating_str: Elo
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@ -71,3 +71,4 @@ post_my_panel_str: panneau (publie les statistiques)
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locale_change_successfully: langue modifiée avec succès en
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locale_not_changed: n'est pas encore pris en charge :-(
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change_lang_str: conf fr (pour configurer le bot en français)
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panel_elo_rating_str: Elo
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@ -169,7 +169,7 @@ if __name__ == '__main__':
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create_table(db, db_user, table, sql)
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table = "players"
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sql = "create table "+table+" (player_id bigint PRIMARY KEY, player_name varchar(40), lang varchar(2))"
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sql = "create table "+table+" (player_id bigint PRIMARY KEY, player_name varchar(40), lang varchar(2), elo_rating float)"
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create_table(db, db_user, table, sql)
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############################################################
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133
mastochess.py
133
mastochess.py
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@ -20,7 +20,7 @@ import chess.svg
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from cairosvg import svg2png
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import chess.pgn
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from PIL import Image, ImageFont, ImageDraw
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import lichess.api
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import math
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def cleanhtml(raw_html):
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cleanr = re.compile('<.*?>')
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@ -31,7 +31,48 @@ def unescape(s):
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s = s.replace("'", "'")
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return s
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def create_panel(username, played_games, wins):
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# Function to calculate the Probability
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def Probability(rating1, rating2):
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return 1.0 * 1.0 / (1 + 1.0 * math.pow(10, 1.0 * (rating1 - rating2) / 400))
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# Function to calculate Elo rating
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# K is a constant.
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# d determines whether
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# Player A wins or Player B.
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def EloRating(Ra, Rb, K, d):
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# To calculate the Winning
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# Probability of Player B
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Pb = Probability(Ra, Rb)
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# To calculate the Winning
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# Probability of Player A
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Pa = Probability(Rb, Ra)
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# Case -1 When Player A wins
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# Updating the Elo Ratings
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if (d == 1) :
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Ra = Ra + K * (1 - Pa)
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Rb = Rb + K * (0 - Pb)
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# Case -2 When Player B wins
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# Updating the Elo Ratings
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else :
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Ra = Ra + K * (0 - Pa)
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Rb = Rb + K * (1 - Pb)
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Ra = round(Ra, 6)
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Rb = round(Rb, 6)
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print("Updated Ratings:-")
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print("Ra =", Ra," Rb =", Rb)
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return(Ra, Rb)
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# This code is contributed by
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# Smitha Dinesh Semwal
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def create_panel(username, rating, played_games, wins):
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if played_games > 0 and wins > 0:
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@ -77,10 +118,12 @@ def create_panel(username, played_games, wins):
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panel_games_str = get_locale("panel_games_str", player_lang)
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panel_wins_str = get_locale("panel_wins_str", player_lang)
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panel_ratio_str = get_locale("panel_ratio_str", player_lang)
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panel_elo_rating_str = get_locale("panel_elo_rating_str", player_lang)
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draw.text((y+70,x+120), panel_games_str + ': ' + str(played_games), font=fnt, fill=(255,255,255,220)) #fill=(255,255,255,255)) ## full opacity
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draw.text((y+70,x+170), panel_wins_str + ': ' + str(wins), font=fnt, fill=(255,255,255,220)) #fill=(255,255,255,255)) ## full opacity
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draw.text((y+70,x+220), panel_ratio_str + ': ' + str(ratio) + '%', font=fnt, fill=(255,255,255,220))
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draw.text((y+70,x+80), panel_games_str + ': ' + str(played_games), font=fnt, fill=(255,255,255,220)) #fill=(255,255,255,255)) ## full opacity
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draw.text((y+70,x+130), panel_wins_str + ': ' + str(wins), font=fnt, fill=(255,255,255,220)) #fill=(255,255,255,255)) ## full opacity
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draw.text((y+70,x+180), panel_ratio_str + ': ' + str(ratio) + '%', font=fnt, fill=(255,255,255,220))
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draw.text((y+70,x+230), panel_elo_rating_str + ': ' + str(round(rating)), font=fnt, fill=(255,255,255,220))
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fnt = ImageFont.truetype('app/fonts/DroidSans.ttf', 15, layout_engine=ImageFont.LAYOUT_BASIC)
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@ -978,6 +1021,8 @@ def claim_draw(username):
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def close_game(username, checkmate):
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d = 0
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try:
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conn = None
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@ -996,6 +1041,30 @@ def close_game(username, checkmate):
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black_player = row[1]
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cur.execute("select elo_rating from players where player_name = (%s)", (white_player,))
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row = cur.fetchone()
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if row[0] != None:
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white_rating = row[0]
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else:
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white_rating = 1500
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cur.execute("select elo_rating from players where player_name = (%s)", (black_player,))
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row = cur.fetchone()
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if row[0] != None:
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black_rating = row[0]
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else:
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black_rating = 1500
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cur.close()
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except (Exception, psycopg2.DatabaseError) as error:
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@ -1028,16 +1097,28 @@ def close_game(username, checkmate):
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winner = username
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if winner == white_player:
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d = 1
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else:
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if query_word == search_end and username == white_user and stalemate == False:
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winner = black_user
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d = 2
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elif query_word == search_end and username == black_user and stalemate == False:
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winner = white_user
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d = 1
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K = 30
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new_white_rating, new_black_rating = EloRating(white_rating, black_rating, K, d)
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try:
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conn = None
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@ -1050,6 +1131,10 @@ def close_game(username, checkmate):
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cur.execute("update stats set winner=(%s), finished=(%s), updated_at=(%s) where game_id=(%s)", (winner, finished, now, game_id))
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cur.execute("update players set elo_rating=(%s) where player_name=(%s)", (new_white_rating, white_user))
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cur.execute("update players set elo_rating=(%s) where player_name=(%s)", (new_black_rating, black_user))
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conn.commit()
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cur.close()
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@ -1094,9 +1179,21 @@ def get_stats(player):
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wins = row[0]
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cur.execute("select elo_rating from players where player_name = (%s)", (player,))
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row = cur.fetchone()
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if row[0] != None:
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rating = row[0]
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else:
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rating = 1500
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cur.close()
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return (played_games, wins)
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return (rating, played_games, wins)
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except (Exception, psycopg2.DatabaseError) as error:
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@ -1745,9 +1842,9 @@ if __name__ == '__main__':
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elif query_word == search_panel:
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played_games, wins = get_stats(username)
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rating, played_games, wins = get_stats(username)
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create_panel(username, played_games, wins)
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create_panel(username, rating, played_games, wins)
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toot_text = '@'+username
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@ -1969,11 +2066,11 @@ if __name__ == '__main__':
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toot_text += '\n' + winned_games + "\n"
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played_games, wins = get_stats(username)
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rating, played_games, wins = get_stats(username)
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wins_of_many = get_locale("wins_of_many", player_lang1)
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toot_text += username + ': ' + str(wins) + ' ' + wins_of_many + ' ' + str(played_games) + "\n"
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toot_text += username + ': ' + str(wins) + ' ' + wins_of_many + ' ' + str(played_games) + ' (Elo: ' + str(round(rating)) + ')' + '\n'
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player_lang2 = get_lang(playing_user)
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@ -1981,7 +2078,7 @@ if __name__ == '__main__':
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toot_text += "\n@"+playing_user + ': ' + well_done + "\n"
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played_games, wins = get_stats(playing_user)
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rating, played_games, wins = get_stats(playing_user)
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winned_games = get_locale("winned_games", player_lang2)
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@ -1989,7 +2086,7 @@ if __name__ == '__main__':
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toot_text += '\n\n' + winned_games + "\n"
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toot_text += playing_user + ': ' + str(wins) + ' ' + wins_of_many + ' ' + str(played_games) + "\n"
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toot_text += playing_user + ': ' + str(wins) + ' ' + wins_of_many + ' ' + str(played_games) + ' (Elo: ' + str(round(rating)) + ')' + '\n'
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elif check == False and stalemate == True:
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toot_text += '\n' + winned_games + "\n"
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played_games, wins = get_stats(username)
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rating, played_games, wins = get_stats(username)
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toot_text += username + ': ' + str(wins) + ' ' + wins_of_many + ' ' + str(played_games) + "\n"
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played_games, wins = get_stats(playing_user)
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rating, played_games, wins = get_stats(playing_user)
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toot_text += playing_user + ': ' + str(wins) + ' ' + wins_of_many + ' ' + str(played_games) + "\n"
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@ -2258,7 +2355,7 @@ if __name__ == '__main__':
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toot_text += '\n' + winned_games + "\n"
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played_games, wins = get_stats(white_player)
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rating, played_games, wins = get_stats(white_player)
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toot_text += white_player + ': ' + str(wins) + ' ' + wins_of_many + ' ' + str(played_games) + "\n"
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toot_text += '\n' + winned_games + "\n"
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played_games, wins = get_stats(black_player)
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rating, played_games, wins = get_stats(black_player)
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toot_text += black_player + ': ' + str(wins) + ' ' + wins_of_many + ' ' + str(played_games) + "\n"
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elif query_word == search_panel:
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played_games, wins = get_stats(username)
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rating, played_games, wins = get_stats(username)
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create_panel(username, played_games, wins)
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create_panel(username, rating, played_games, wins)
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toot_text = '@'+username
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