Depends what you play in all honesty.
If its cash then if your on a losing session for more than a coupe of days then some would say its variance but more than likely its your game thats at fault.
I"ve been on a losing streak far longer than a few days on a few occasions in cash games. I was getting my money in with the best hands and then getting shafted by variance. AA v KK busted three times in one session - losing four times my initial stack on the last occasion (and therefore negating 6 hours of relatively good and productive play).
Of course, I made mistakes and my play wasn"t perfect, but variance can certainly affect your cash game for more than a couple of days.
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there is always a method of playing a hand which can minimise its affect!
I just think its all to easy to blame "luck".
You can keep the pot size small to minimise the effect of bad luck because it means that you lose less if you"re outdrawn - but that"s not necessarily good poker.
For example if after the flop you have bottom pair and your short stacked opponent goes all in - but - you put him on 2 overcards to the (non flushing, non straightening) board (eg AK or AQ), wouldn"t you call?
You"re about 75% favourite to win the pot, you have to call if you trust your judgement - but if he pairs one of his overcards that"s just bad luck, and the only way you would have been able to play it to avoid the damage would have been to fold when you were a massive favourite to win the pot.
Is this what you would advocate?
Im not advocating laying down the best hand at all here, yes he has a 25% chance of hitting but its not bad luck its simply a 1 in 4 statistical possibility.
And thats what ppl sometimes forget, its not "bad luck"! Its people who believe in luck that are usually the ones red in the face suffering from tilt!
My counter argument to yours jon would be that unless this was very early on in the tournament you should be looking to be agressive and be stealing blinds/antes so when a shortstack does do something like this, you should be freerolling with your call anyway.
If you win great, more chips- if you lose, back to where you were maybe 20 minutes ago.
Like i said your mistake doesnt have to be made on the hand you currently playing, it could have been two/three rounds ago when you had the chance to steal chips to freeroll against a shortstack, am i making sense?