CATAN
Can you reveal a victory point card bought this turn to reach 10 points and win at once?
The rulebook gives this exception for a victory point card that reaches 10, and forum replies agree; one online version is said to differ.
Yes. A victory point card you buy on your turn can be shown for the win at once if it lifts you to 10 points, so you do not have to hold it for a later turn. Showing it for the win does not count as using your development-card play.