spin on the ball. At the other end of the spectrum there are finger spinners who rely much more on the wrist action. Either way, the wrist position at the point of release determines how the ball spins. Variations There is a large range of variations used by fingerspinners, with a brief description of the most common given below. Arm ball – a delivery with an upright seam faced towards the batsmen, which swings in and follows the direction of the arm. Generally bowled with a lot of backspin. Topspinner – a delivery with an upright seam rotating towards the batsmen, which generally tends to dip and bounce more than other deliveries Undercutter – a delivery with the seam horizontal, that skids on towards the batsmen. Seldom used in recent times. Doosra – a ball that turns from leg to off (a legbreak), but that is delivered in a similar manner to the traditional offbreak, such that it can be extremely difficult to differentiate between the two. Teesra – otherwise known as a backspinner, this delivery rotates backwards from the view of the batsmen, with the seam scrambled (thus differentiating it from the arm ball). Carrom ball – a surprise variation, flicked off the middle finger (in a similar fashion to a disk in the Asian game of Carrom) that turns from leg to off (a legbreak). Off-spin Traditionally, finger spinners bowled with an emphasis on side spin. With the advent of covered and better batting pitches the focus changed to bowling with a component of top spin. The top spin provides loop which makes it harder for the batsman to make an early judgement of the length of the delivery. The ball tends to be released with a slightly upward trajectory which raises the ball above the batsman's eye line. The topspin on the ball then causes the ball to dip earlier and bounce higher. The side spin component of the delivery causes it to drift, courtesy of Bernoulli's principle. For a stock, side spin or under cutter this causes the ball to drift away from the batsman. The combination of drift, loop and spin combine to provide the finger spinner's attacking ability. Doosra A doosra (, Hindi दूसरा) is a particular type of delivery by an off-spin bowler in the sport of cricket, popularised by Pakistani cricketer Saqlain Mushtaq. The term means ‘(the) second (one)’, or ’(the) other