Here's a rapport from my bluffcatching study session.
Bluffcatching is done by checking when the following criteria are satisfied:
- Villain is aggressive.
- We beat most of his current range - check/fold or a pure bluff are the best lines if we don't.
- We don't beat enough of his calling range to warrant a value bet - if we did, we would value bet.
We don't want to value bet since we don't beat enough of his calling range. However, since our villain is aggressive we expect him to bluff with many of the hands that we beat, thus we play check/call instead of betting.
When the villain bets we don't care that much about his sizing as we normally would. We are representing a weaker hand and we thus expect him to bet small when going for value. Thus a big bet is likely to be a bluff. Of course he might be trying to level us - many great players will bet big trying to represent a bluff in these situations - and some villains don't understand value betting either. So we can't be totally ignorant of his sizing.
Here are two example of bluffcatching, assume that we're playing against an aggressive villain in both.
Blinds: 15/30
Pre-Flop: (75, 2 players) Hero is BB with K♠ T♣
Villain raises to 75, Hero calls 60
Flop: K♦ 6♥ 5♥ (150, 2 players)
Hero bets 110, Villain calls 110
Turn: J♠ (370, 2 players)
Hero raises to 190, Villain calls 190
River: 9♠ (750, 2 players)
Hero checks, Villain bets 500, Hero calls 500
After villain has called two streets he's unlikely to be sitting on either of the lower pairs and if he do, he's probably not calling a third barrel with overcards on both the turn and river. However, a large part of his calling range are draws which have now missed. We go ahead and check, thus representing a missed draw ourselves and giving him the opportunity to bluff his missed draws.
Here's another one:
Blinds: 15/30
Pre-Flop: (75, 2 players) Hero is SB with Q♠ 7♦
Hero raises to 75, Villain calls 60
Flop: Q♦ 8♥ 4♣ (150, 2 players)
Villain checks, Hero bets 90, Villain calls 90
Turn: 8♠ (330, 2 players)
Villain checks, Hero checks
River: 2♠ (330, 2 players)
Villain bets 240, Hero calls 240
Against most opponents our mediocre top pair isn't good enough for three streets of value when the middle card pairs so by check behind on the turn we still extract maximum value (by betting the river if he checks) but we also give him the opportunity to bluff his floats.
The hero call is a very marginal bluffcatch, often relying on even more specific villain tendencies like timing or bet sizing tells. Calling with a 4 or A high in the second example would have been a hero call.
Another kind of bluffcatching move is the float. My favourite spot to do it is against 3 bets when the flop comes low and dry. Like this one:
Blinds: 15/30
Pre-Flop: (75, 2 players) Hero is SB with K♥ J♥
Hero raises to 75, Villain raises to 225, Hero calls 150
Flop: Q♦ 7♥ 2♣ (450, 2 players)
Villain bets 300, Hero calls 300
Turn: 8♠ (1050, 2 players)
Villain checks, Hero bets 650, Villain folds
We obviously need our villain to continuation bet a lot. This can be hard to get reads on so I'd just assume that if he continuation bets in position he'll do it out of position too. Furthermore, we don't want him to be one of those aggressive calling station that are so common on the weekends. Finally, we want the board to miss most of his 3 bet range - dry with two low cards should suffice. If he bets the turn folding here.
My next topic will be playing draws.