• En-Passant
• Format
• Data
  • Jan 2013 - Dec 2018
  • Color palette
• games.py
• gif.py
• Old code
• Some Games

En-Passant

• get all games (my estimate from most common to least common) on lichess.org with

  0. king the king delivering checkmate
  1. qbishop underpromoting to a bishop with mate
  2. qknight underpromoting to a knight with mate
  3. kcastle kingside castling with mate
  4. qcastle queenside castling with mate
  5. enpassant en passant mate

• all pgn files from lichess database

• until 2016: under En-Passant/data in .csv format

• all data: uploaded to Google Drive

Format

The data is written to a .csv file seperated by ,'s.

• number: type of checkmate delivered
  • 0: king
  • 1: qbishop
  • 2: qknight
  • 3: kcastle
  • 4: qcastle
  • 5: enpassant
• path: append to 'https://lichess.org/' to get full url
• date: UTC date of the game
• time: UTC time of the game
• white
• black
• white elo
• black elo
• time control
• event: type of the game
• moves: moves in pgn format (some with clock or evaluation data)

Example

0,csrzdu82,2013.01.01,20:23:57,Trebizonde,FF4,1715,1508,300+10,Rated Classical game,1. e4 b6 2. d4 ...

• 0: the king delivering checkmate
• url: https://lichess.org/csrzdu82
• played (UTC): 2013.01.01 20:23:57
• white: Trebizonde, 1715
• black: FF4, 1508
• time control: 300+10 or 5+10
• event: Rated Classical game
• moves: 1. e4 b6 2. d4 ...

Data

Jan 2013 - Dec 2018

Rating probability distribution

Number of games

Number of games per month

Number of games per month per million

Color palette

The colors are based on the lichess chessboard.

#f0d9b5, #b58863, #b57563, #b5534b, #ca6565, #ff9f9f

games.py

All of the code I used to make the diagrams is here. Parts of it are quite messy though and I'll have to clean them up in the future.

• read:
  • read_games: read the .csv file
  • read_log: read the log file
• p_ratings: probablity distribution in time interval
  • _fit: fit data with a gaussian
• games_t: number of games over time (relative or absolute)
• games_sum: sum of games over time
• ratings_sum_t: sum of rating every year over time (figures get saved in folder as .png files)
• _from_year: → _from_interval: get the relevant data from time interval
• _from_input: str, int, range, list are converted to list

gif.py

This code was used to make rapid screenshots of the lichess board. Those screenshots were then converted to a GIF with GIMP for some games.

• test: show a screenshot of region
• gif: save screenshots to folder

Old code

This is code without OOP from July 2021. There I had only implemented en passant mates. I searched for all en passant mates until 28.02.2018

Some Games

https://lichess.org/yTHX1AmK

https://lichess.org/C56jMMwJ

https://lichess.org/IsQiLytk

https://lichess.org/qt0fCmCF

https://lichess.org/J7hU9ZhQ

https://lichess.org/713ynukD

https://lichess.org/n1sYKpUy

https://lichess.org/BQZgi3HO

https://lichess.org/15yWW38A

https://lichess.org/MQu042Yx

https://lichess.org/zC0viWG7