Originally Posted by cover drive man
Hate to sound ignorant here, but what is a doosra?
As Richard said, it is the finger-spinners delivery that turns the opposite way to the standard off break (eg, for a right arm off spin bowler, bowling to a right hand batsman, it's a ball that would turn to the off side, or from the bowlers point of view, to the left).
I've tried bowling it numerous times (I am a seam bowler, but occasionally bowl a bit of spin), and I say it is impossible to bowl legally. Whilst IMO, in time they will learn to bowl it legally, whether through actually learning how to do it more effectively, or the rules being bended again, but it will eventually happen. Thus, I think this is stupid, we should be teaching our young spin bowlers the doosra as a variation ball, after they have competently learned their stock ball and the ins and outs of bowling finger spin.