Swiss tournaments are on Lichess

Thanks a lot @thibault for making Swiss possible! This is really another fantastic improvement on Lichess! We are very happy with this.

I will do a test tournament with my team tomorrow. One thing: after I made the swiss tournament (that starts tomorrow) I wanted to change it in an unrated tournament. But this seems not to be possible, because after I put the swtich to unrated and I save the new tournament settings, it still is a rated tournament. Is this a bug maybe?

I just completed a 15 player Swiss 6 rounds for our club - the new format worked really well. Congratulations and thanks to all involved. Really pleased at the speed and quality of the response from LiChess to forum feedback.

👍👍👍👍👍

Some bugs remain:

1. One player should not get multiple byes unless absolutely necessary.
2. Tournaments are ending, saying all legal pairings have been exhausted. That's clearly not the case.

lichess.org/swiss/WPU5gToH

So excited this is being offered here. Thanks for adding the feature so quickly!

@schack2

1. With so few participants, this may not be avoided. Maybe it was necessary. The Swiss system is designed for tournaments with a large number of participants and not for tournaments with a small number of participants. Maybe that's why multiple byes of one player couldn't be avoided. Smaller teams or teams in which only a few people participate in team tournaments, I advise to wait until round robin tournaments are available here on lichess.

2. The tournaments end when the number of rounds that the tournament director/creator has predetermined has been played. He has set the tournament to 4 rounds. So only 4 rounds are played.
And once in addition to said; with only 7 participants, that's already a lot.

@schack2

1. I agree, we had a player who got two byes here: lichess.org/swiss/QZ3aGhcE
#15 had two byes, when e.g. #13 had none. Seems unnecessary!

2. It's hard to tell from the final standing of the tournament. If a players has paused participation or left lichess, he/she will not be considered for the next draw. I had this situation here: lichess.org/swiss/OVz8sSEt where I could see that out of the active players, both #1 and #2 only had #8 left to play, since players #6, #7 and #9 were all paused or had left

@Randomeister Players, who are pausing or do not participate anymore, are marked with "-" in these rounds. This tournament lichess.org/swiss/WPU5gToH shows that all players played all rounds!

@odoaker2015 Not completely sure what this answer was in reference to?

1. I still think the drawing is incorrect when the same player gets a bye more than once, even though there are other players who could have a bye instead

2. If a tournament ends prematurely, presumably due to no possible draw, then it's impossible to see afterwards who was paused and who was available for the next round at that point. My example was showing that lichess terminated the tournament correctly, since three players had paused or left the tournament at that point. You can't see that from the table.

@Randomeister

1. "If a players has paused participation or left lichess, he/she will not be considered for the next draw. I had this situation here: lichess.org/swiss/OVz8sSEt where I could see that out of the active players, both #1 and #2 only had #8 left to play, since players #6, #7 and #9 were all paused or had left" That is what my answer was referring to.

2. Yes, you can see who is pausing or has left the tourney: In your tournament see 7 Bustuta he is marked with - in round 5 He was absent. 8 Rawow he is marked with - in the rounds 2 and 3 because in these rounds he was absent too.

@odoaker2015

The discussion initiated by @schack2 is concerning why the tournament was terminated before all rounds had completed. You can not see from the table who was active at the point when the tournament was terminated. Your example is from someone who was absent in a previous round. Not at the point of tournament termination.