Bowling ball random when impacting a full rack of pins on the first delivery of a frame, and sometimes when hitting downed "dead wood" pins on subsequent deliveries—the candlepin bowling sport is the only major one that allows fallen pins, provided no part of any fallen pin extends more than 24 inches (61 cm) forward of the head-pin spot, to remain on the lane's pindeck to be used in knocking down more pins with the next ball delivery in the same round—up to three balls are delivered, much as in duckpins, in each round of candlepins for one bowler. Bowling ball A
Five-pin bowling react to a ball rolled or pin knocked down. When bowling on free fall pinsetters, the bowler would have to press a button to initiate a pick-up cycle to clear downed pins lying on the pin deck. If automatic scoring is in use, all automatic resets are actually initiated by the scoring computers. The lower operating and maintenance costs of the string pinsetter eventually led to the demise of free-fall pinsetters. When a bowling centre retires free-fall pinsetters, the old machines are usually bought by other free-fall equipped bowling centres and are disassembled for parts. Free fall pinsetters are still