Scoring rules:

• The person(s) closest to 21 points without going over wins.
• Number cards are their value (1 =1, 2 = 2, etc)
• King, Queen, and Jack cards are 10
• Ace can be counted as 1 or 11 (player’s choice).
• If someone scores over 21 they are disqualified.
• Anyone using over 5 cards is disqualified.

Some example hands:

A, J => 21
A, 10, A => 12
8, A, A => 20
5, 3, 7 => 15
K, Q, J => went over 21!

Inspired by:

• colinfmurphy.com/blackjack-code-kata/
• beatblackjack.org/en/rules/
• codewars.com/kata/blackjack-scorer