New db usage experience

[KuronoJoucho]

Thanks to a failed bluffing experience, I got an unpopular db situation.
if 4player, abcd
alice clue 2 to b
b:B1 R2 XX XX
c: B2 xx xx xx
d: B5 Y5 R5 R4
Then b will play blindly because he can't see the 1 that others can play, and successfully play B1, while Cathy will continue to play blindly because 2 is not the correct connection of 1, so it is revealed that 2 is a bluff, and 2 is regarded as not any 2 other than blue.
The situation I used before ignored the blind play of player C. In fact, this is a DB that will happen.
Thanks for reading.

[Romain672]

The situation is fully a disease bluff I think?
It is more obvious and more commun if you put r2 in D's hand and replace b2 by a 1:
B: b1-4-x-x
C: g1-4-x-x
D: 4-x-r2-x
A clues 2 to D.
B plays b1 expecting r1.
Then C know that D is going to bomb and can either correct the clue (by clueing b on b2 to E per example), assume 2x b2 in his hand, or play himself. The consensus on hgroup after testing all three was that the first possibility (heal clue) was too rare and too annoying to keep track of for few upside. The second was too rare and make you lose effeciency in a lot of situations if you assume that part. The third one (disease bluff) is what is commonly assumed in both hgroup on bga I believe.

Note that if you replace g1 by b2 that work too.


In your situation though, since the 2 is on B, C knows he has negative 1 since B didn't knew which color was it's 2, and so know he has exactly b2.

[Blacktango]

You can even make the bluff longer

Alice clue 5 to Carole :



Bob is bluffed. Carole tries to continue the B finesse, and David + Eve try to reveal the bluff.

[KuronoJoucho]

This is great, in fact everyone is talking about the variant of The Pestilent Double Bluff

[KuronoJoucho]

The situation is fully a disease bluff I think?
It is more obvious and more commun if you put r2 in D's hand and replace b2 by a 1:
B: b1-4-x-x
C: g1-4-x-x
D: 4-x-r2-x
A clues 2 to D.
B plays b1 expecting r1.
Then C know that D is going to bomb and can either correct the clue (by clueing b on b2 to E per example), assume 2x b2 in his hand, or play himself. The consensus on hgroup after testing all three was that the first possibility (heal clue) was too rare and too annoying to keep track of for few upside. The second was too rare and make you lose effeciency in a lot of situations if you assume that part. The third one (disease bluff) is what is commonly assumed in both hgroup on bga I believe.

Note that if you replace g1 by b2 that work too.


In your situation though, since the 2 is on B, C knows he has negative 1 since B didn't knew which color was it's 2, and so know he has exactly b2.

Yes, The Pestilent Double Bluff.
I realized this right away, but I played it as a self-bluff. There is no self-bluff based on pure numbers, self-bluff can only be done on the marked colors, and I paid a bombing price for this.That's why I posted a record

[Romain672]

Yeah it's called a Pestilent double bluff.
Just the disease bluff regroup all my three possibilities, but since two of the three interpretations are extremely rare, that name doesn't look useful anymore.