If competition has multiple categories and there is a special rule saying that pigeon can carry 1 race only in 1 category, MyPigeons offers an option to lock certain races to selected pigeon and selected competition.
Calculation will ommit these races in other competitions (categories) that allow locking. Good example is Slovak championship (2013 - 2016) which comes in 5 diferrent categories (Short, Middle, Long, Super-long and Yearling team competition).
In each category fancier needs 3-5 winning pigeons, each pigeon needs to win 2-5 prizes in diferrent distance category. Special rule was, that 1 pigeon can use 1 race in 1 category. Pigeon could be in multiple categories, but under condition that he won separate races for each category.
In case, races are overlapping over multiple categories, Fancier is supposed to choose his priority and sign up for 1 of them, or alternatively, pick next best pigeons / races for the second category and still fight for the best prize.
To help fanciers with automating this calculation MyPigeons offers an option to lock race for a pigeon in competition so no other competition will use this race for this pigeon in calculation.
To change this setting, you need to be logged in to your account and you need access to this pigeon - either your account is paired to fancier record with ownership of this pigeon, or you are club / district administrator where this pigeon competes.
If you have access to this pigeon, just click the "lock" or "unlock" icon in detailed view next to race you want to change. Setting is saved immediately, if you refresh other categories you can see changes (used races) in detailed view immediately. Total list order and pigeons used for this categories will change after next recalculation.