board games with recfiles

data/recfiles.md

@@ -44,6 +44,7 @@ recsel $database
 ```
 
 - [Extended example](recfiles/extended.md)
+- [Playing with board games data](recfiles/Board_Games.md)
 
 # Resources
 

data/recfiles/Board_Games.md

@@ -0,0 +1,61 @@
+---
+title: "Board Games"
+tags: [ "data", "recfiles" ]
+---
+
+You can play with a board games database from boardgamegeek.com.
+
+## Download the Database
+
+```sh
+mkdir board_games
+cd board_games
+curl -Lo bg.zip 'https://www.kaggle.com/api/v1/datasets/download/threnjen/board-games-database-from-boardgamegeek'
+unzip bg.zip
+```
+
+The header line shows fields with a bunch of colons, which will confused `recutils`, so we'll have to get rid of them.
+
+```sh
+sed -i '1s/://g' *.csv 
+```
+
+Convert the games to `.rec` format.
+
+```sh
+csv2rec games.csv > games.rec
+```
+
+## Queries
+
+If you try to look at older games, you'll find lots of results.
+
+```sh
+recsel games.rec -e "YearPublished < 1800" -c
+recsel games.rec -e "YearPublished < 1800" -Cp Name
+```
+But most are wrong.
+The problem is games with a `YearPublished` date of `0`, probably because the year published is unknown.
+
+```sh
+recsel games.rec -e "Name = 'The Goblin King is Angry'" -p YearPublished
+```
+
+Fix the query by removing games published in '0 AD'.
+
+```sh
+recsel games.rec -e "YearPublished < 1800 && YearPublished != 0" -R YearPublished,Name
+```
+
+Or fix the database setting `YearPublished` to 'unknown':
+
+```sh
+recsel games.rec -e "YearPublished = 0" -Cp Name
+recset games.rec -e "YearPublished = 0" -f "YearPublished" -S 'unknown'
+```
+
+Strategic games which work best with 3 players, sorted by Average Rating:
+
+```sh
+recsel games.rec -e "BestPlayers = 3 && CatStrategy = 1" -CR Name --sort=AvgRating
+```