Sand Blocks Level 423 Walkthrough
10/21/2026
Overview
Medium merge mastery on Level 423. Video walkthrough.
Step-by-step walkthrough
Level 423 is medium-block dominant with aggressive queue. Cluster 3 medium in L-shape same color, drop 4th → 16-cell cascade. Set up 7 such cascades per level. Every drop without a cascade wastes 3 cells. Level 423 tests your medium-block clustering ability above all. Watch cluster positions at drops 4, 10, 16, 22, 28, 34.
💡 Pro tip
Cluster 3 medium, drop 4th = 16-cell cascade. 7 clusters per level.