I'm working on adding "1800" to the game list.
One of the features it uses is bonds. This seems to be different from the bonds of the 1830 "bonds" variant at http://www.fernuni-hagen.de/FTB/dc/docu/18xx/games/e1830bon.txt
Details at https://boardgamegeek.com/filepage/76947/1800-rules
I'm working on adding "1800" to the game list.
One of the features it uses is bonds. This seems to be different from the bonds of the 1830 "bonds" variant at http://www.fernuni-hagen.de/FTB/dc/docu/18xx/games/e1830bon.txt
Details at https://boardgamegeek.com/filepage/76947/1800-rules