Compact Split Box (pre 4.6.0)

The Compact Split Box was a Pro Kit Box in Asphalt 8: Airborne introduced in the 2018 Spring Update.

It is one of the few boxes that still grant blueprints and bike-specific cards after the 2019 Spring Update. If players still have it in their pending boxes list, it is advised to open them wisely, for example during a bike event.

Players are presented four card pairs and can choose one card from each pair. This enables them to increase the frequency of a desired card by rejecting the other one.

Availability
The box was rewarded for completing a Daily Tasks streak. As of the Fast Lane Update, completing a streak now rewards instead of a box, so the Compact Split Box is practically discontinued as there is no other way to obtain it.

Hidden rules
The presented card pairs follow certain rules:
 * 50:50 – The first two pairs grant Blueprints, the second two pairs grant  Car Parts, Bike Parts, Tech or Engines.
 * 1) Equal type – Each of the second pairs is either Car Parts, Bike Parts, Tech or Engines.
 * 2) Equal class – If one of the second pairs is Car Parts or Bike Parts, they are of equal class.
 * 3) Exception – Engine cards can also appear together with Tech or Part cards. They break rule 2.

Statistics
Although a player can only obtain 4 cards from this box, all 8 offered cards were included in the sample, so the sample size for this box shows cards from  boxes, instead of the expected  cards. This has the advantage that all possible outcomes are included so that the relative frequencies of cards are unbiased and independent from the player's choice.

Tech
As the hidden rules guarantee that the cards of each pair are of equal type, Early Tech and Initial Tech will always be presented togther. This makes it a good opportunity for players looking for Early or Initial Tech: A player in need of Initial Tech cards can double their current relative frequency of % to % by always choosing them from the Tech pairs.

As the box is not available any more, players can open the instead which has the same mechanism.