Levels / Level 37

Signal Before Key

Target 120 · 9 active colors
Level details

Reach the first score signal before a yellow clear can open the center. Reach 120 points across 9 colors. This board has ordered 2-signal lock at 0,0. The opening includes a 11-layer blue stack at 1,0.

LIVE CAMPAIGNHexa Stack
SPACE9
Score0of 120
Gates0/10/2 · 10 score → ▲ Yellow
Whole board overview-2,0: Empty+-2,1: 3 layers, top yellow3-2,2: Empty+-1,-1: Empty+-1,0: 3 layers, top green3-1,1: Empty+0,-2: 3 layers, top purple30,-1: Empty+0,0: 0/2 · 10 score → ▲ Yellow0/2 · 10 score → ▲ Yellow0,1: Empty+1,-2: Empty+1,-1: Empty+1,0: 11 layers, top blue111,1: Empty+2,-1: 5 layers, top red5

Overview only. Use the board below to place stacks. ! marks a fragile landing.

E 0
?
Tools at a glance

UndoNo action to undoRestore the last action. Limited uses; no energy cost.

Tray RefreshNeed 8 more energyReplace the remaining stacks in your hand.

Board RefreshNeed 20 more energyExchange occupied stacks; matching neighbors merge only after your next placement. Needs two different stacks.

HammerNeed 16 more energyRemove one occupied stack to reopen space.

Drag the background sideways to see the whole board
Click or dragUse all 3 to refill

Reach the first score signal before a yellow clear can open the center. The yellow key only counts after the score signal is lit; keep a landing cell ready for it.

Move 0 · Clear at 10+
1–3 select · Arrows move · Enter place · U undo · R restart · M sound

Hexa Stack puzzle level 37

How to play Signal Before Key

Reach the first score signal before a yellow clear can open the center. Reach 120 points across 9 colors. This board has ordered 2-signal lock at 0,0. The opening includes a 11-layer blue stack at 1,0.

Hexa Stack Level 37 opening board diagram
Opening board preview for level 37
Campaign difficulty
Medium
Board cells
15
Chapter
Sequence Locks
Target score
120 cleared layers
Active colors
9

Strategy hint

The yellow key only counts after the score signal is lit; keep a landing cell ready for it.

Need the core rules? Read the how-to-play guide.