Modus operandi in cheating, collusion and secretly communicating in Tichu cardgame involves:
a) 2 persons - the most common one, usually they sits together in table 1/2 vs 3/4, and instead of same nationality, they are using difference nationality. Amateur approach will be of same nationality. 2 "The Duet" vs "The Marks"(another 2 players).
b) 3 persons "Trio of deception". Lurking in random table.
c) 4 persons or more - a ring. Training mode table? Internal cheatings among this small group of players.
d) One person? One person using multiple accounts??, This person has to be highly IT skill proficiency, (please read topic "The Rise and Fall..."). A is B and A is also C. ABC vs D.
3 persons or "Trio of deception" involves ABC versus D ("The Mark").
A is the mastermind, his minions B and C are working to boost his rating. B will partner D, B will pass 2/3 constantly to A and C or dog to C, so if C wins lead, C will pass lead to A.
Instead of passing to make a quad or flush bomb frequently(amateur approach), they go for long straights or 1010JJ, a much more quieter combination than the usual bomb "kaboom" noise that arouses suspicion from "The Mark". Lesser singles to throw out from team AC, increases their chance of 1-2, thus winning the game.
In the future, there will be "Trio of deception", and it will be 3 players from 3 different nationalities.