Preflop Chart

Cutoff opening range

The cutoff has only the button to worry about, so the range opens up: every pocket pair, every suited ace, suited connectors and one-gappers, and the offsuit broadways down to JTo. It is the seat where steals start paying.

Cutoff opening range54 hands, 25% of combos
Raise from any positionHijack and laterCutoff and buttonButton and small blindFold

Cutoff opening range, written out

Raise to 2.5 big blinds when the action folds to you. 54 hands, about 25% of all starting combinations.

Pairs
AA, KK, QQ, JJ, TT, 99, 88, 77, 66, 55, 44, 33, 22
Suited
AKs, AQs, AJs, ATs, A9s, A8s, A7s, A6s, A5s, A4s, A3s, A2s, KQs, KJs, KTs, K9s, QJs, QTs, Q9s, JTs, J9s, J8s, T9s, T8s, 98s, 97s, 87s, 76s, 65s, 54s
Offsuit
AKo, AQo, AJo, ATo, A9o, KQo, KJo, KTo, QJo, QTo, JTo
Added over the hijack
44, 33, 22, A7s, A6s, A4s, A3s, A2s, K9s, Q9s, J8s, T8s, 97s, 76s, 65s, 54s, ATo, A9o, KJo, KTo, QJo, QTo, JTo

Everything not listed is a fold from this seat. Ranges are simplified beginner ranges for 6-max, 100bb cash; solver ranges mix at the edges.