Fdb97531 is the 8 ball version of the infamous 7 ball siteswap db97531. Each of the 8 crossing throws is lower than the last so that the balls are caught in the reverse order. The first throw (a "15") should be four times as high as the basic pattern, and the balls should all peak at about the same time.
The world record for the longest run of this pattern is 2 rounds (to a collect), set by Luke Davies in 2017.(video) Alex Barron(video) and Luke Davies(video) are the only people who have done an fdb97531 to a qualify.
Other people who have done an fdb97531 to a collect or to a non-qualifying run:
- Daniel Eaker in 2008 (video)
- Josh Turner in 2011 (video)
- Marcin Hałas in 2012 (video)
- Leo Daniels in 2012 (at age 12 - video)
- Amadeusz Kołak in 2013 (video)
- Dan Wood in 2013 (video)
- Malte Hamann in 2015 (video at 4:18)
- Julius Preu in 2015 (video)
- Alex McGillivray in 2017 (video)
- Tom Whitfield in 2017 (video)
- Foppe Coenen in 2018 (video)
- Carlos Chaparro in 2018 (video)
- Hadrien de Crozals in 2019 (video)
- Dylan Tweed in 2019 (video)
- Lauge Benjaminsen (claim)
- Dave Leahy (8 throws before and after - claim)
- Nick Thomas (claim)
- Felix Sürbe (claim)
- Max Kuschmierz (8 throws after - claim)
You can use these siteswaps to practice some of the same kinds of throws and sequences of throws that are done in fdb97531, before you try the full trick.