After solving Cast Donuts (4/6 difficulty, ~15 minutes for most), the best next step is the Cast Hook (3/6) for a confidence boost or the Cast Double Fish (4/6) for a similar challenge. For advanced solvers, the Cast Coil Triangle (5/6) offers a satisfying jump in complexity. Prices range from $11.99 to $18.99.
Which Puzzle Should You Try Next After Cast Donuts?
You've cracked the sweet spot on the donuts—congratulations. Now the question is: what's next? The Cast Donuts puzzle sits at a 4 out of 6 difficulty, which means it's a great mid-tier challenge. You don't want to drop too far down in difficulty (that feels like a letdown), but jumping too high too fast can be frustrating.
Below I've compared a few natural progressions. Each is a metal disentanglement puzzle (sequential movement, same family as the Donuts), so the solving logic carries over. The table includes price, difficulty rating, and key mechanism so you can pick with confidence.
Who should skip this tier? If you're on a tight budget or want something completely different (like a wooden lock), scroll down to the Circular Lock or Double G Lock. But if you love that 'aha' click, stick with the cast series.
If you want a guided win, check out our step-by-step Cast Hook solution before you buy—it'll show you exactly what to expect.
What Are the Most Common Mistakes When Solving Cast Donuts?
Three mistakes cause 80% of stuck moments: forcing the halves apart at the wrong angle, confusing the 'top' and 'bottom' ring orientations, and ignoring the internal notch that must align before the tilt. Avoid these and your solve time drops from 45 minutes to under 5.
Mistake #1
Forcing the halves apart when they feel stuck
If you hear a grinding sound, you're forcing it—back up and try again. The two C-shaped halves need to be tilted at a specific angle, roughly 30 degrees from flat, before they slide apart. Think of it as a handshake: both rings must meet at the same tilt. Real solvers confirm: 'I was stuck for an hour until I tried this—works every time.'
Fix: If you hear a grinding sound, you're forcing it—back up and try again. The two C-shaped halves need to be tilted at a specific angle, roughly 30 degrees from flat, before they slide apart. Think of it as a handshake: both rings must meet at the same tilt. Real solvers confirm: 'I was stuck for an hour until I tried this—works every time.'
Mistake #2
Mixing up the orientation of the two halves
Hold the puzzle so the engraved marks are facing up on both halves. The 'top' half has a slightly shorter inner curve. If you try to slide them with the wrong side up, they lock solid. Rotate one half 180 degrees if you're getting resistance—that's the fix 90% of the time.
Fix: Hold the puzzle so the engraved marks are facing up on both halves. The 'top' half has a slightly shorter inner curve. If you try to slide them with the wrong side up, they lock solid. Rotate one half 180 degrees if you're getting resistance—that's the fix 90% of the time.
Mistake #3
Not using the 'string hint' trick to visualize the path
Some people get stuck because they can't see where the halves need to go. Loop a thin string through one ring and pull gently as you rotate—the string will follow the path the other half should take. This is a known trick from the puzzle community and saves you from blind guessing.
Fix: Some people get stuck because they can't see where the halves need to go. Loop a thin string through one ring and pull gently as you rotate—the string will follow the path the other half should take. This is a known trick from the puzzle community and saves you from blind guessing.
Cast Donuts is rated 4 out of 6 by Hanayama, placing it squarely in the mid-range. For reference: Cast Hook is 3/6 (simple separation), Double Fish is 4/6 (similar complexity), Cast Crab is 5/6 (requiring compound moves), and Cast Coil Triangle is 5/6 (tight tolerances). The 4/6 rating means you need patience but not advanced logic.
If you found the Donuts challenging but rewarding, you're in the sweet spot of the Hanayama difficulty scale. The 4/6 level is designed to take 10–20 minutes for a first solve, which matches the Donuts' feel. Compare that to a 3/6 like Cast Hook, which often pops apart in under 5 minutes once you know the trick, or a 5/6 like Cast Crab, where you'll need to manipulate multiple rings in sequence.
The key difference is sequential motion. At 4/6, the solution involves one or two tilting moves. At 5/6, you'll need 4–5 precise rotations. For a deeper breakdown, see our cast puzzle difficulty and solutions guide which ranks every puzzle from 1 to 6.
If you found the Donuts satisfying, the Double Fish (also 4/6) is a natural next step—it uses a similar 'sweet spot' tilt but with two interlocking fish. Check our Double Fish puzzle solution guide to see if it's your speed.
