2-3

2-3 can refer to the following:
 * World 2-3 from various games
 * Level 2-3 from various games
 * Stage 2-3 from Donkey Kong for the Game Boy
 * Chapter 2-3 from Super Paper Mario
 * Area 2-3 from Mario vs. Donkey Kong: Mini-Land Mayhem!
 * 2-3 Remix (Pyramids), a sample course in Super Mario Maker

2-3