Professor Layton and the Diabolical Box

Puzzle 055: Sammy's Necklace

Original diagram for Puzzle 055: Sammy's Necklace

Join eight seven-link chains into one loop as cheaply as possible, at $2 per link opened and closed.

Chapter
Chapter 2
Location
Station Platform · Sammy
Picarats
30 picarats
Type
Write Answer
Region
Same in all versions
Hint 1: A gentle nudge. Tap to flip.
Hint 1

Opening the end of every chain works, but it isn't the cheapest.

Tap to flip back
Hint 2: The key idea. Unlocks after the previous card is flipped.
Hint 2

An opened link can join two chains. Where else could the links come from?

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Hint 3: Almost there. Unlocks after the previous card is flipped.
Hint 3

Sacrifice one whole chain: open all seven of its links and use them as connectors.

Tap to flip back
Answer: See the answer. Unlocks after the previous card is flipped.
Answer

The answer is $14.

Tap to flip back
Solution, FAQ and sources

Solution

Open all **seven** links of one chain. That leaves seven chains to join into a loop, and a loop of seven chains needs exactly seven connections: one opened link for each gap.

7 links × $2 = **$14**, cheaper than the $16 approach.

About this puzzle

Sammy has eight short chains of seven links each and wants one big loop. Opening and closing a link costs $2. Opening one end link on every chain would cost $16, but there’s a cheaper way. What’s the lowest cost?

Unofficial fan guide, not affiliated with LEVEL-5 or Nintendo. Puzzle description, hints and solution written by Hint by Hint.

Similar puzzles: Puzzle 054: Painting the Flag, Puzzle 059: A Ticket to Where?, Puzzle 060: Plaza Puzzle, Puzzle 047: The Mayoral Election

All Professor Layton and the Diabolical Box puzzles

FAQ

What is the answer to Puzzle 055, Sammy's Necklace, in Professor Layton and the Diabolical Box?

The answer is $14.

Where do you find Puzzle 055 in Diabolical Box?

Puzzle 055 appears in Chapter 2, in the Station Platform area, when you talk to Sammy.

How many picarats is Diabolical Box Puzzle 055 worth?

30 picarats.

Sources

Facts checked on November 14, 2026

Unofficial fan guide. Not affiliated with, endorsed by, or sponsored by LEVEL-5 Inc. Professor Layton, The New World of Steam, and all related names, characters, and trademarks are the property of their respective owners.