Number Stack
1+2=3. Then only multiples of 3 merge with themselves. Different math from 2048.
Score
0
Max
3
Best
0
⌨️ Arrow keys / 📱 Swipe
How to play
A 4x4 board with numbers. Swipe in a direction; every tile shifts one cell that way. Merge rules:
- 1 + 2 = 3 (the only "non-multiple" merge)
- 3 + 3 = 6, 6 + 6 = 12, 12 + 12 = 24 ... and so on
- Other combinations don't merge (1+1, 2+2, 1+3 — none work)
After each swipe, a new 1, 2, or 3 spawns. Each tile's score equals its value. Goal: build the largest number you can.
Key difference vs 2048
In 2048, every same-color pair on a row merges in one swipe. In Number Stack, each tile merges at most once per swipe, and only if "1+2 or matching multiple of 3." That makes strategy more granular — you can't just clump all the 3s and expect them to auto-fuse; direction control is everything.
Inspiration
Tribute to Sirvo LLC's Threes! (2014). Fully original native DOM implementation here; visuals, rules, and feel are BverGame original.