What is 9b 2b?

2b stands for 2 base hit or a double.

4a+2b+a

From 6 April 1997 any salary related scheme that wants to Contract-out has to meet a test of overall scheme quality - the Reference Scheme Test (RST). Schemes must provide benefits for members that...

for batters 2b means double which means the got to second base on one hit for fielders it means second basemen

In baseball statistics, 2B refers to a "double," a hit where the batter ends up on second base. 2B can also refer to the second baseman, or to second base, depending on the context.