Quick terminology question, 1 is a fork, 2 is a pin, but what do you call No. 3? Thanks in advance : r/chess

Glossary of chess - Wikipedia

Chess Noob - The Fork

Beginners! Read this! - Chess Forums

Fork in chess

Chess Tactics: Forks and Pins in Action - Chessable Blog

Chess Terms, Phrases, & Expressions Defined (With Examples)

Results: How do chess players think II

The King's Indian Defence - Move by Move, PDF

The 4 hour workweek by thushanth - Issuu

Science Cast

Chess Terms, Phrases, & Expressions Defined (With Examples)