Overcome an obstacle

Failure: fail or succeed at a serious cost
Tie: fail or succeed at a minor cost
Success: success
Success with style: success, gain a boost/offer a story detail)

Create an advantage (created/discovered aspect)

Failure: no aspect is created, or aspect is created but enemy gets free invocation
Tie: boost is created/discovered
Success: aspect is created/discovered, gain one free invocation (you or ally)
Success with style: aspect is created/discovered, gain two free invocations (you or ally, can invoke on same turn)

Create an advantage (known aspect)

Failure: no advantage is created
Tie: gain one free invocation (you or ally)
Success: gain one free invocation (you or ally)
Success with style: gain two free invocations (you or ally)

Attack

Failure: attack fails
Tie: attack fails, gain a boost
Success: attack succeeds (damage equal shifts)
Success with style: attack succeeds (damage equal shifts or one less and gain a boost)

Defend

Failure: attack succeeds
Tie: attack fails, opponent gains a boost
Success: attack fails
Success with style: attack fails, gain a boost