Recently, X's club was hosting a two-stage tournament. The first stage consisted of a full round-robin between all teams and the second stage would be a final betwen the top two teams from the round-robin.
Among the entrants for the tournament, there were two heavyweights: Team A, the defending champions, and Team B, the runners-up from the previous edition. Both teams contained experienced players who had chalked up tons of masterpoints in the past.
After the penultimate round of the round-robin, three teams remained in contention for the final. A were sitting pretty with a ~25 VP lead over second-placed B, who in turn had a 5 VP lead over Team C, a surprise contender full of young and inexperienced players. Notably, there were no masters of any level in C, unlike A and B.
In the last round, A played C (my friend admits that in hindsight, this schedule was a bad idea). Shockingly, C won the match 79-5 on IMPs and 20-0 on VPs (16-board rounds) to overtake B, who could only win ~13-7, into second place. C eventually lost by a considerable margin to A in the final, unlike the previous year where the final between A and B was hotly contested.
Shortly after the last round, several members of B approached X, who was directing at that time, and accused A of exhibiting "suspicious behaviour" in their match against C. They alleged that A had deliberately thrown the match against C in order to face a more favourable opponent in the final. Below are some boards they provided for my friend for reference (I am not a proficient player by any means so unlike X, I have no authority to judge the legitimacy of their claims):
Board 4, Closed Room (EW are from A).
Claim (by B): With 20 HCP, East jumped straight to 7NT, which is frankly ridiculous given that his partner can have as low as 15 HCP. Even though West had a good hand, he could have simply invited the grand by bidding 5NT or used a more scientific method, knowing very well that an ace might be missing.
Defense (by A): East held a good hand and felt that his clubs could provide a source of extra tricks even if partner was minimum. As they did not play Gerber, there was no way to tell if partner was missing an ace and they were willing to take a 'small' risk as they had already qualified.
Result: -1 when North cashed his ace. Other room was 6NT+1 after a diamond lead and North was squeezed in the club and heart suits.
Board 12, Closed Room.
Claim: Even NV against V, to preempt 3C with a Yarborough is completely insane - or a deliberate move to throw away thousands of points when the opponents have no game/slam.
Defense: It is in EW's convention card that they play light preempts (this is confirmed by X), which can become very light at favourable vulnerability. However, EW admitted that they had never preempted with a 0 HCP hand (but had frequently done so with 2-3 HCP hands) prior to this tournament.
Result: -6 for -1400. Other table: +1370 for NS in 6D.
Board 15, Open Room.
Declarer won the heart lead in dummy and led to the ace of trumps, before crossing to dummy and finessing in the spade suit. West won and promptly cashed the ace of diamonds to set the contract.
Claim: Finessing in the spade suit makes no sense at all - the norm is always to play for the drop with a 9-card fit.
Defense: The odds are very close and East played suspiciously quickly on the first round of trumps - so that swings the balance in favour of finessing. (According to X, observing an opponent's tempo is apparently AI.)
Result: -1, -100. At the other table, declarer played for the drop and made +1430.
After observing the boards with only B's input, X came to the conclusion that there was indeed instances of suspicious behaviour by A and hence sought clarification from members of A on their actions after the final had finished - to which they provided the defenses as stated above. While vehemently denying throwing the match, they did admit that they had played a bit "loosely" as they had already qualified for the final (see board 4 above). In the end, X ruled that there was insufficient evidence to conclude that A had thrown the match, but is still interested to seek other's opinions.
These are his questions:
1. Was X's decision correct? Was there ample evidence to conclude that A was game throwing?
2. Even if they had been found guilty of game throwing, would A have faced disciplinary action? In other words, is game throwing
(a) Illegal, i.e. is it against any specific Law;
(b) Unethical, meaning it can be investigated in the same way that cheating has been?
3. If game throwing is both legal and ethical, then by extension can match-fixing be as well? For example, if two teams agree to pass out all boards so that they can both get 10 VPs, would this be skirting the boundaries of permissible behaviour?
4. If game throwing is either illegal or unethical, how much evidence is needed to conclude that a team is game throwing, and how strong must the evidence be? For instance, a team biding 7NT on all boards and then conceding 13 tricks is obviously game throwing, but the boards mentioned above may not be.
Thanks all!