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What happens if both players go berserk?

There are 9 people in a tournament: A, B, C, D, E, F, G, H and I.
A, B, C, D and E are friends and they decide that, if two of these play against each other (for example A-B or B-E), both go berserk and it's an advantage (the games are shorter and are worth more points). What to do against it?
There's nothing you can do about it. The serious answer IS to beat them.
From a game theory perspective #4 is correct. If the majority collude to attempt to win a tournament, unless the tournament has specific rules against it then you just need to defeat them all.

There's no rule against collusion in the Lichess Terms of Service (unless to advance some other aim such as rating inflation/deflation, or something else that explicitly violates an existing rule).
even if you win all games, you are not guaranteed to win the tournament, because the other players might simply get to more games with their strategy
@mrburns123 Such is true with any form of collusion; they could play solid openings against you but risky openings against each other, resulting in more games.

A Swiss or Round-Robin format would somewhat help in that regard, but years ago Lichess had Swiss events and nobody would play them.
Answered 2 years ago by Chess_Agent

This is a label that is found on profiles that engage in two forms of cheating. Both forms are outlined in Lichess' TOS (http://en.lichess.org/terms-of-service).

1. Sandbagging:

Sandbagging is the act of "deliberately playing below one's actual ability in order to fool opponents into accepting higher stakes bets, or to lower one's competitive rating in order to play in a future event with a higher handicap and consequently have a better chance to win" (en.wikipedia.org/wiki/Sandbagging).

Essentially, if you attempt/aim to lose in order to lower your rating, you are sandbagging.

2. Boosting:
Boosting is the act of artificially increasing your rating. This can be done in many ways. One of the common ways is to create another account and play rated games against it. Another common way to boost one's rating is to ask a friend to help you do so. They lose, you win, and the computer slaps both your profiles with that red label.

You can be considered a booster if you assist sandbaggers. If you know that somebody is sandbagging and you continue to play them, you are artificially boosting your rating. It is tempting to continue, but please don't. The computer has no mercy and you will both be marked.

If you notice someone sandbagging, please do report it. Sandbagging affects many users and makes it less fun to play. (Example, if a 1200 plays at a grandmaster level, you would be pretty angry once you lose 35 rating points to the sandbagger.)

Thank you :)

"Collusion" in tournaments would fall under "asking a friends help" to manipulate ratings. Although the rules do not specifically mention "sandbagging to help friends win a tournament, they apply to this case.
Just recently, in the Yearly Arena Event, a player had all his games removed and scores deleted for this very same infraction.

So Toadofsky's statement "there is no rule against collusion in tournaments" that would effect results (as well as ratings) is incorrect.

Common sense, fair play rules tells us "collusion" (fixing games by intentionally losing; sandbagging) is against the rules, whether it be for ratings or tournament results.
So the answer to what can be done? Report it, state the evidence and let Moderators do their job. Keep in mind, frivolous reports are highly frowned upon. These cases are difficult at times to prove, but is easily within the scope of the detection team.
Of course it is against the rules to fix games in an attempt to influence the outcome of a tournament.
Ha... my statement in its entirety was:

"There's no rule against collusion in the Lichess Terms of Service (unless to advance some other aim such as rating inflation/deflation, or something else that explicitly violates an existing rule)."

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