A mathematical sequence from 1202 governs your every stamp. Match the target fabric by placing blocks on cells the sequence permits — one move at a time.
In 1202, the Italian mathematician Leonardo of Pisa — known as Fibonacci — described a sequence he found in the growth of rabbit populations: 1, 1, 2, 3, 5, 8, 13, 21… where each number is the sum of the two before it. He had no idea he was also describing the spiral of a nautilus shell, the floret arrangement of a sunflower, the branching of a river delta — and the underlying geometry of how master block printers in Bagru and Sanganer have laid their stamps for centuries, without ever writing a formula.
1
+
1
=
2
→
3
→
5
→
8
→
13
→ ∞
✦
In nature
Sunflower seeds, nautilus chambers, pine cone spirals — the most efficient packing geometry in the natural world.
⬡
In Rajasthani craft
Bagru and Sanganer printers space their repeats at Fibonacci intervals intuitively — patterns that feel alive, not mechanical.
◈
In this game
The current Fibonacci number sets your stamping stride — which cells are reachable shifts with every move you make.
1
Each turn, the active Fibonacci number sets a stride. Cells whose position on the fabric is divisible by that number are highlighted — those are your only valid moves.
2
After each stamp, the sequence advances to the next number. Early turns give dense choices; later turns open into sparse, wide leaps.
3
Match the target's shape, dye color, and rotation exactly. You have finite ink — plan which cells matter most before the stride moves past them.
Choose your difficulty
Apprentice
4×4 · 16 ink
Artisan
5×5 · 20 ink
Master
6×6 · 24 ink
fibonacci · stride 1
stride 1every cell is valid
"The printer's first sweep"
The sequence begins. Every cell is valid — like a printer's first full sweep across fresh khaddar. It won't stay this open for long.
Fibonacci sequence — active stride shown in terracotta
Your fabric
Click an amber cell to select it
Target pattern
0% match
Shape, dye, and rotation must all align
Match
—
Ink used
—
Round score
—
Block shape
Dye color
Rotation
Select an amber cell, then stamp.
About Fibonacci mode
Leonardo of Pisa (1202) found this sequence in rabbit population growth. It also governs nautilus spirals, sunflower florets, and the stamping cadence of Bagru block printers — all without a formula ever being written. The stride expands with the sequence: small early, vast late. Current stride: 1 — every cell is yours.