What should always be split
Aces and 8s should always be split
What should never be split
10 and 5 should never be split
When should you split 2s
You should split 2s vs 2-7 (if doubling is allowed after against 2,3)
What other pairs follow the same rules for splitting 2s
3s and 7s are the other pairs that sallow the same rules for splitting 2s (7s doesn’t matter if DAS is allowed)
When should you split 9s
You should split 9s vs 2-9 except 7
When should you split 6s
You should split 6s vs 2-6 (if DAS offered against 2)
When should you split 4s
You should split 4s vs 5,6 if DAS allowed