Db97531

Db97531 is a symmetrical 7 object siteswap where all the throws cross, and the objects are thrown and then caught in the reverse order. This is the 7 object version of b97531. The d (a "13") is four times as high as the cascade, and almost 1 1/2 times as high as the b (an "11"). All the objects should peak at the same time.
Thomas Dietz was the first person to do a db97531 and go back to a qualified basic pattern on video,(at 7:04) in 2003. (Ben Beever is reported to have done this trick before that, but not on video). Daniel Eaker was the first person to connect two of them and go back to a qualified pattern.(video) Lauge Benjaminsen was the first person to do three connected db97531s with a qualify afterward,(video) as well as the first to do four rounds to a qualify.(video) The youngest person ever to do a db97531 to a qualify was Leo Daniels, at age 12.(video)
==World records==
A round of this pattern is one instance of the throws "db97531", all of which must be caught for that round to be counted. Multiple rounds must all be directly connected.
World records with publicly available video evidence:
*7 ball db97531: 26 rounds by Ofek Snir in 2016 (video)
*7 ring db97531: 1 round by Lauge Benjaminsen in 2012* (video), Jonah Botvinick-Greenhouse in 2018* (non-public video, later video), and Spencer Androli in 2023* (video)
*7 club db97531: 1 round by Moritz Rosner in 2020 (video) and Spencer Androli in 2023* (video)
Unverified claims:
*7 ball db97531: 31 rounds by Ofek Snir in 2017 (claim)
*7 ring db97531: 1 round by Christian Hauschild in 2014 (claim) and Eivind Dragsjø (claim)
*to a qualify
==Siteswap exercises ==
You can use these exercises to practice the same kinds of throws and sequences of throws that are done in this pattern, before you learn the full pattern.
Some of the siteswaps listed below are shortened to leave out parts where you’re not doing anything. Click on them to see animations of the exercises.
You should practice doing these starting with your right hand and with your left hand, so that you will be ready to learn the full symmetrical pattern.
Prerequisites: b9753, 8888881
Exercises to prepare for db97531:
*1 ball d
*2 ball db
*3 ball d
*3 ball db1
*3 ball db9
*4 ball db
*4 ball db91
*4 ball db97
*5 ball db9
*5 ball db971
*5 ball db975
*6 ball db97
*6 ball db9751
*6 ball db9753
*7 ball db975
==Variations==
*fdb97531
*fdb9753
*e531db9
*db97c31
*db975a1db97538
*db97538
*eca86420
thumb|left|640px|3 rounds of db97531 by Lauge Benjaminsenthumb|left|640px|db97531 variations by Josh Turner
Category:Patterns
Category:Siteswaps
Category:7 object patterns
Category:Asynchronous patterns
Category:Ground state siteswaps
Category:Period 7 patterns
Category:Freeze-frames
Category:Symmetric patterns