How do I play Shape Count Deluxe?

A figure made of straight lines is drawn. Count every triangle you can trace along the drawn lines · small cells, overlapping middles, and the big outlines · then tap the number you believe is right.

Are the answers really correct?

Yes, provably. The answer is computed by exhaustively checking every triple of intersection points in the figure with exact integer arithmetic · never counted by hand and never taken from a formula. The reveal shows every counted triangle, one by one.

What counts as a triangle?

Any three corner points of the figure that are not on one line, where all three connecting sides run entirely along drawn lines. Triangles of every size count, including ones that overlap or contain each other.

Why do I keep missing triangles?

Most people count only the smallest cells and forget the composed ones · two cells that merge into a bigger triangle, or the outer outline itself. Counting systematically by size is the skill the game trains.

What does Shape Count Deluxe train?

Systematic visual decomposition · breaking a cluttered figure into parts, scanning them in an order, and not trusting your first glance. The countdown at high difficulty adds speed pressure on top.

Shape Count Deluxe

图里藏了多少个三角形?每个答案都经穷举证明 · 揭晓时把数到的三角形一一点亮

FAQ

About PlayMemorize Shape Count Deluxe

Shape Count Deluxe is the classic "how many triangles are in this figure?" puzzle, rebuilt so it can never lie to you. One line figure is drawn · a fan of cevians, a cut triangle, a star overlay, or a scattered set of small figures · and you pick how many triangles hide in it, counting the tiny cells, the overlapping middles, and the big outlines alike.

Mathematically proven answers. The internet versions of this puzzle are famously wrong because their answers are counted by hand. Here the answer is computed by exhaustively enumerating every triple of intersection points over the exact drawn segments, with exact integer arithmetic · no rounding, no epsilon, no formula. The drawing and the proof come from the same data, so they cannot disagree.

See the proof. After you answer, the reveal flashes every counted triangle one by one with a numbered badge · the "aha" moment that shows exactly which triangles you missed or double-counted. Higher difficulties add more lines, trickier overlaps, and a countdown.

Part of the PlayMemorize family · runs in your browser and works offline as a Progressive Web App.

FAQ

How do I play Shape Count Deluxe?

A figure made of straight lines is drawn. Count every triangle you can trace along the drawn lines · small cells, overlapping middles, and the big outlines · then tap the number you believe is right.
Are the answers really correct?

Yes, provably. The answer is computed by exhaustively checking every triple of intersection points in the figure with exact integer arithmetic · never counted by hand and never taken from a formula. The reveal shows every counted triangle, one by one.
What counts as a triangle?

Any three corner points of the figure that are not on one line, where all three connecting sides run entirely along drawn lines. Triangles of every size count, including ones that overlap or contain each other.
Why do I keep missing triangles?

Most people count only the smallest cells and forget the composed ones · two cells that merge into a bigger triangle, or the outer outline itself. Counting systematically by size is the skill the game trains.
What does Shape Count Deluxe train?

Systematic visual decomposition · breaking a cluttered figure into parts, scanning them in an order, and not trusting your first glance. The countdown at high difficulty adds speed pressure on top.