There is something strange about the Hahn games score. If one doesn't win by 100% (resignation) and the board is counted, splitting the score percents, the game is marked as lost for both players, in the games list and in calculating the rating.

Example: https://www.littlegolem.net/jsp/game/game.jsp?gid=1870170

I'm not familiar with the Hahn score system, but it does look strange: when I went to the game (the above weblink) I see:

White: 73 (area) + 24 (prisoners) + 6.5 (komi) = 103.5 points

Black: 80 (area) + 9 (prisoners) = 89 points

White win by 14.5 points.

And White getting “70” and Black getting “30”… but in your game record list it does show it as a loss for you:

List of games [Crelo] [Go]

GameOpponentRatingTournamentMovesResult#1870170Stefan Wroclawski3.7dgo19.in.HAHN.53 Hahn Pointing System244lost

…and as a lost game for your opponent too.

Weird.

List of games [Crelo] [Go]

GameOpponentRatingTournamentMovesResult

#1888532silversmith76.4kgo19.in.HAHN.56 Hahn Pointing System54win

#1882884Manowar73.6kgo19.in.HAHN.55 Hahn Pointing System117lost

Yes one is a win and one a loss, but both were won 100-0

Indeed. The funny part is that Stefan lost it also:

This bug has been around for a few years:

“Hahn counting wins as losses”

http://littlegolem.net/jsp/forum/topic2.jsp?forum=20&topic=345

“Hahn Pointing System - won games counted as lost games!!”

http://littlegolem.net/jsp/forum/topic2.jsp?forum=20&topic=301