Uncategorized

The Best Puzzle Boxes

This post contains affiliate links. As an Amazon Associate we earn from qualifying purchases.

Our picks are based on Amazon bestseller rankings, verified customer ratings, and product availability. We update our recommendations regularly to ensure accuracy.

Puzzle boxes encompass a broad category, ranging from practical storage solutions to intricate brain teasers designed to challenge problem-solving skills. Whether used for organizing kids' toys and craft supplies or as unique gifts holding hidden treasures, their functionality varies significantly. Products were evaluated based on their intended purpose, material durability, complexity of engagement, user reviews, and feature analysis.

Best Overall

Puzzle Potato Tesla Box - Electronic Puzzle Box - Escape Room Game in a Box - Brain Teaser - 3D Wooden Puzzle for Adults - Money Puzzle Box for Cash Gift - Birthday GiftBox MoneyBox

$59.99

The Puzzle Potato Tesla Box offers a unique blend of electronic and mechanical challenges, providing a highly engaging escape room experience in a box.

Search on Amazon
Best Budget
IRIS USA Board Game Storage Craft Organizer Box with Snap-Tight Latch Lid, 10-Pack Portable Plastic Case Bin for Puzzles, Magazines, Hobbies, Art Supplies, Fits 8.5" x 11" & A4 Papers, Slim, Clear

IRIS USA Board Game Storage Craft Organizer Box with Snap-Tight Latch Lid, 10-Pack Portable Plastic Case Bin for Puzzles, Magazines, Hobbies, Art Supplies, Fits 8.5" x 11" & A4 Papers, Slim, Clear

$49.49

The IRIS USA 10-pack provides a cost-effective solution for organizing multiple puzzles or craft supplies with its clear, durable plastic cases.

View on Amazon
Best Premium

iDventure Cluebox The Trial of Camelot | Escape Room Puzzle Box | Challenging 3D Puzzle | Brain Teaser for Adults | Unique Gift Idea

$54.95

The iDventure Cluebox The Trial of Camelot delivers a sophisticated, story-driven escape room puzzle box, offering substantial replayability and a deep challenge.

Search on Amazon

Looking for the best Puzzle Boxes?

Discover now our comparison of the best Puzzle Boxes. It is never easy to choose from the wide range of offers. On the market, you will find an incalculable number of models, all at different prices. And as you will discover, the best Puzzle Boxes are not always the ones at the highest prices! Many criteria are used, and they make the richness and relevance of this comparison.
To help you make the best choice among the hundreds of products available, we have decided to offer you a comparison of the Puzzle Boxes in order to find the best quality/price ratio. In this ranking, you will find products listed according to their price, but also their characteristics and the opinions of other customers. Also discover our comparisons by categories. You won’t have to choose your products at random anymore.

SaleNo. 1
Puzzle Potato Tesla Box - Electronic Puzzle Box - Escape Room Game in a Box - Brain Teaser - 3D Wooden Puzzle...
  • 𝐓𝐄𝐒𝐋𝐀 𝐁𝐎𝐗 - Embark on an electrifying journey and uncover the secrets of Nikola Tesla's lost invention.
  • 𝐄𝐋𝐄𝐂𝐓𝐑𝐎-𝐌𝐄𝐂𝐇𝐀𝐍𝐈𝐂𝐀𝐋 𝐏𝐔𝐙𝐙𝐋𝐄𝐒 - Test yourself and your friends with this escape room in a box, featuring mind-boggling electro-mechanical riddles and unique mechanics using 38 hidden...
  • 𝐔𝐍𝐈𝐐𝐔𝐄 𝐄𝐗𝐏𝐄𝐑𝐈𝐄𝐍𝐂𝐄 - By combining electronic and mechanical challenges, the Tesla Box stands apart from traditional wooden puzzle boxes. Its truly immersive puzzles will keep you engaged at every turn!
  • 𝐏𝐄𝐑𝐅𝐄𝐂𝐓 𝐅𝐎𝐑 𝐌𝐎𝐍𝐄𝐘 𝐆𝐈𝐅𝐓𝐒 - Suitable as a gift box with a hidden compartment for jewelry, coins, and bills. Perfect gift idea for birthdays, weddings, and Christmas. (Hiding a present inside will...
  • 𝐑𝐄𝐒𝐄𝐓𝐓𝐀𝐁𝐋𝐄 - The Tesla Box is completelly resettable. Which means, it can be played as many times as you want. Reset instructions can be accessed via QR code.
No. 2
Onietoiy Big 32 Steps Wooden Secret Puzzle Box Toys Beech Wood Money Holder Handmade Storage Brain Teaser...
  • [ENGAGING 32-STEP CHALLENGE] – FUN FOR KIDS & TEENS Unlock the joy of discovery! Our 32-step interlocking mechanism is specifically designed to spark curiosity and logical thinking in children aged 6+ without being overly frustrating. It’s a perfect...
  • [THE ULTIMATE GIFT WITHIN A GIFT] – CREATIVE SURPRISE BOX Upgrade your gifting game! This secret compartment box is the most memorable way to give cash, gift cards, or small jewelry. Instead of a boring envelope, hide your surprise inside the box and...
  • [100% NATURAL SOLID BEECH WOOD] – SAFE & DURABLE Quality you can trust. Crafted from high-grade German Beech wood, this puzzle box is sturdy enough to withstand active play. Each piece is hand-polished to a silky-smooth finish with no sharp edges or...
  • [LARGE HIDDEN TREASURE CHEST] – STORE SMALL SECRETS More than just a puzzle! With its generous interior space (7.8" x 3.9" x 4.3"), it serves as a "private safe" for kids to store their favorite coins, stickers, or small collectibles. The elegant...
  • [PREMIUM GIFT-READY PACKAGING] – NO EXTRA WRAPPING NEEDED Make a lasting impression right out of the box. Our wooden mystery box comes in a luxurious dark green gift box with elegant gold foil accents. Whether it’s for Christmas stocking stuffers...
No. 3
Cryptex Da Vinci Code Mini Cryptex Lock Puzzle Boxes with Hidden Compartments Anniversary Valentine's Day...
  • 【THE STORY OF DA VINCI CODE】The Da Vinci Codec is copied from the Da Vinci manuscript in "The Da Vinci Code". According to the plot of the story, there is a scroll about the greatest secret of the Priory of Sion and even the whole Christianity hidden...
  • 【EASY TO USE】Password setting: The default password of the cryptex is I LOVE U, you can also set your own password. We provide steps and tools to modify the password, which is very simple. You can play a detective game with your partner or children...
  • 【LOVE GIFT】If you plan to propose or give a Valentine’s Day gift, anniversary, anniversary gift, etc., then the cryptex is a great choice for you. Its unique password setting will add romance, fun and mystery to you. We will give you a pair The...
  • 【GIFT】The Da Vinci code is an excellent gift, the most interesting gift for friends, colleagues, children, parents, partners, etc. on Christmas, Halloween, New Year and other memorial days. Mysterious and surprising.You can play it as a puzzle box.
  • 【AFTER-SALES SERVICE】If you are not satisfied with the Da Vinci code or have any other questions about the cryptex, please contact us and we will try our best to solve your problem. Unconditionally provide a 90-day money-back guarantee.
No. 4
allboxesinoneplace Puzzle Box, Secret Wooden Puzzle Box with Hidden Compartments for Money, Gift Card, Escape...
  • HOW IT WORKS - This medium difficulty puzzle box requires five steps to be solved The average time to open the brain teaser puzzles is 15 minutes The first clue is given by the hinges – you will figure out at once that the cover is secured by a secret...
  • HOW IT'S MADE - Everything is made using classic tools and a lot of soul, from solid recycled sycamore wood The wooden puzzle box are carefully crafted, carved and finished in our workshop in small batches The puzzle boxes are hand carved with...
  • THE STORY - One day a beautiful young woman, Ecaterina, whom my great-grandfather loved in secret, came to visit his workshop She asked him to make her a japanese puzzle box with a hidden compartment Constantin crafted a beautiful mind games, which he...
  • TIPS AND TRICKS - If you want to tell someone you like them and you lack the inspiration, you can do it without words Just take the five steps required to open the puzzle box for kids with secret safe, five small steps for mankind, five giant leaps for...
  • STYLE - This treasure chest borrows design elements from industrial, steampunk and retro styles, and is manufactured in Transylvania Elegant and simple, the puzzle gift box will perfectly go with your ambient and it is appropriate for modern, classic, or...
  • SIZE - Outer size: see product pictures, Inner size - *Main secret compartment: 4.6 in x 2.6 in x 1.37 in *Bottom secret compartment: 4.6 in x 2.6 in x 0.4 in
  • SPECIFICATION - Material: solid sycamore wood, Finish: natural oils and lacquers, Texture: smooth, Weight: 12 ounces, Compartments: two secret compartments, Puzzles Box - Made in Transylvania
SaleNo. 5
IRIS USA Board Game Storage Craft Organizer Box with Snap-Tight Latch Lid, 10-Pack Portable Plastic Case Bin...
  • MADE IN USA with global materials: Keep your projects organized and portable. The clear plastic hobby modular storage satchel offers an easy solution to organize everything from hobby goods and office supplies, stationery and documents to quilting...
  • SEE THROUGH: Quickly find what you're looking for thanks to the see-through design of the clear plastic organizing container that lets you see what's inside from any angle.
  • CONVENIENT DESIGN: The latch securely closes the craft supply box to keep contents stored and organized inside while also keeping them safe from dust and liquids. The molded handle makes transporting your hobby supplies a breeze and lets you take projects...
  • GET ORGANIZED: The stackable design of the craft caddy container case means you can make the most of limited space and keep different hobbies, crafts, and projects separate. You can even be a super organizer with stickers or labels to easily identify the...
  • GREAT SIZE: BPA-Free 100% Polypropylene 12.2"L x 13"W x 1.6"H.
SaleNo. 6
WOODEN.CITY Treasure Chest Puzzle Box for Adults – 3D Wooden Puzzles Mystery Box Brain Teaser & Escape Room...
  • Escape‑room challenge at home - build the 3d wooden puzzles for adults, then solve the puzzle box for adults to reveal the hidden compartment. A hands‑on mystery box that blends logic, dexterity and story
  • Build & solve - 165 precision‑cut pieces; average build time about 3 hours. After assembly, tackle sequential steps to unlock the secret opening like a real escape room puzzle
  • Gift‑ready & reusable - use as a money puzzle gift box for cash or small surprises; then reset and let friends take the challenge. A memorable present for brain teaser puzzles for adults fans
  • Premium birch craftsmanship - laser‑cut birch wood parts fit smoothly and feel great in hand; kit includes finishing accessories and spare elements for a satisfying, durable result, mind puzzles for adults
  • Compact display piece - finished size approx. 5 × 2.91 × 3.46 in; recommended 14+; medium difficulty (great for difficult puzzles for adults). Looks striking on a desk or shelf
No. 7
iDventure Cluebox The Trial of Camelot | Escape Room Puzzle Box | Challenging 3D Puzzle | Brain Teaser for...
  • 🔑 ESCAPE ROOM GAME – iDventure Cluebox “The secret of Camelot” is a brain teaser puzzle featuring a series of captivating logic challenges that must be solved step by step to unlock the wooden puzzle box. Immerse yourself in the Escape Room...
  • ⚔️ FASCINATING STORY – Legend says that Galahad, the son of Lancelot from Camelot, received this mysterious box from Merlin. Will you be able to solve our brain teaser puzzles and reveal the secret of Camelot?
  • ♻️ REUSABLE BRAIN GAMES – Our Escape Room in a box offers you 60-90 minutes of immersive gameplay. After you have solved our treasure box, you can simply reassemble the Cluebox and let other players solve it. The Cluebox is not just a game, but also...
  • 🎁 CREATIVE GIFT IDEA - Are you already looking for a suitable Christmas present for your loved ones? Thanks to the clever mechanisms, our wooden puzzle for adults will make the heart of any gadget lover beat faster and can also be used as a puzzle box...
  • 🏆 REWARD – As a reward for solving the 3D puzzle you can immortalise yourself on our Wall of Fame. Experience the thrill of our Escape Room Game, delivering an immersive adventure with a level of challenge similar to an advanced Exit Game. The...
SaleNo. 8
DC-BEAUTIFUL Impossible Dovetail Box Mini 3D Brain Teaser Wooden Magic Drawers Gift Jewelery Box Puzzle Toy...
  • ☺This puzzle box is made of high quality wood, safe and no toxic, no peculiar smell, makes you rest assured to use. Recommend for adults and teens aged above 14 years.
  • ☺Bright colors attracts you, smooth surface will not hurts your skin, delicate craftsmanship gives you more fun.
  • ☺This educational puzzle box is at size of 3 * 3 * 2in/ 7.6 * 7.6 * 5cm, light weight allows to carry. Portable feature makes it a practical toy to kill the spare time.
  • ☺This intelligence box is full of challenge if there is no instruction, which can develop the ability to think and practice.
  • ☺Believe in us, this puzzle box must be a best gift for friends and your family, just enjoy the joy of playing together.
No. 9
Puzzle Box 6 Pack Wooden Secret Puzzle Box with Hidden Compartment 3D Brain Teaser Magic Drawers Secret Magic...
  • 【SECRET HIDDEN COMPARTMENT】-You will receive 6 packs of puzzle gift boxes with different styles, and each of them is designed with hidden compartments to hide your treasures, such as cards, cash, jewelry, coins, small gift card, and so on.
  • 【PREMIUM WOODEN MATERIAL】-Our money puzzle boxes are made of premium wooden material, solid and durable, won’t break or deform easily. There are 6 sizes of puzzle gift boxes, and you can choose them according to your storing needs.
  • 【CHALLENGING BOX PUZZLE】-When you feel bored and want to challenge yourself, these difficult puzzle boxes are excellent choices for you. The rule of the puzzle game is to open the trick box ingeniously without violence. Just use your intelligence to...
  • 【INTERESTING AND MEMORABLE GIFT】-You can hide your exquisite gift in these wooden puzzle boxes and see the recipient try their best to get the present, and the process must be very funny and exciting. Especially for those who love brain teasers and...
  • 【FUNNY & EDUCATIONAL】-Our secret puzzle box can foster logical thinking, relieve stress, develop intelligence, improve problem-solving ability, exercise your brain ability, and hand-brain coordination. Suitable for both adults and kids.
No. 10
BSIRI Wooden Secret Money Puzzle Box Brain Teaser with Hidden Compartments Ideal Jewelry Stash 3D Lock Gift...
  • Hidden Compartment Design: A clever puzzle box with a secret compartment that keeps cash or cards secure until the solution is found—fun, surprising, and memorable.
  • Brain Teaser for Adults and Teens: Engaging money puzzle box for cash gift for adults that challenges logic and patience while delivering a satisfying aha moment; perfect as a conversation starter. This puzzle box for adults is a magnificent gift.
  • Gift Card Holder Upgrade: Turn presents into an experience with a gift card puzzle boxes with hidden compartments and unique gift card holder that makes gifting interactive and unforgettable. It is suit to be money gift boxes for cash.
  • Money Gift Made Fun: Use as a money puzzle box for birthdays and holidays; hide bills or lottery tickets and let recipients solve steps to unlock the reward. It is a hard to open gift box.
  • Versatile and Unique: This puzzle gift box serves as a multifunctional item - a stylish jewelry box, a mind-bending brain teaser, and a conversation starter. Surprise your loved ones with this cool gift. It is a puzzle storage for desk decor.

What is the purpose of a comparison site?

When you search for a product on the Internet, you can compare all the offers that are available from the sellers. However, it can take time when it is necessary to open all the pages, compare the opinions of the Internet users, the characteristics of the products, the prices of the different models… Offering you reliable comparisons allows us to offer you a certain time saving and a great ease of use. Shopping on the Internet is no longer a chore, but a real pleasure!
We do everything we can to offer you relevant comparisons, based on various criteria and constantly updated. The product you are looking for is probably among these pages. A few clicks will allow you to make a fair and relevant choice. Don’t be disappointed with your purchases made on the Internet and compare the best Puzzle Boxes now!

Last update on 2026-04-16 / Affiliate links / Images from Amazon Product Advertising API

How to Choose the Best Puzzle Boxes

Understanding the Primary Purpose

When selecting a puzzle box, the main difference lies in its intended function. Are you seeking a practical storage solution or a complex brain teaser? Brands like IRIS USA primarily offer clear plastic storage bins, exemplified by their 10-pack and 6-pack organizers. These are designed to keep items like board games, puzzles, or craft supplies neatly contained and visible, featuring snap-tight latch lids for secure closure. In practice, these excel at organization and portability for children's items or hobbyists. Conversely, products from PUZZLE POTATO, onietoiy, and iDventure are crafted as engaging puzzles, designed to be solved through a series of steps or challenges. The Puzzle Potato Tesla Box, for instance, is an electronic and mechanical puzzle, while the Onietoiy Big 32 Steps Wooden box presents a multi-stage physical unlocking sequence. Users typically find that clarifying this initial purpose streamlines the selection process significantly.

Material and Construction Durability

The material composition of a puzzle box directly impacts its longevity and the tactile experience. Storage-focused boxes, such as those from IRIS USA, are typically made from clear, durable plastic, which allows for easy content identification and is resilient to typical wear and tear in a children's environment. For brain teaser puzzle boxes, wood is a common material, seen in products from onietoiy and iDventure. The Onietoiy box, for example, is made of high-quality beech wood, suggesting a robust construction that withstands repeated manipulation during solving. The iDventure Cluebox also utilizes wooden components, which users often report provides a satisfying weight and feel during gameplay. Electronic puzzle boxes, like the Puzzle Potato Tesla Box, integrate various materials including wood and electronic components, requiring careful handling to preserve their intricate mechanisms.

Complexity and Engagement Level

The level of challenge and engagement offered by a puzzle box varies widely. Simple storage boxes from IRIS USA offer minimal engagement beyond opening a latch. However, for brain teasers, complexity is a core feature. The Onietoiy Big 32 Steps Wooden Secret Puzzle Box, with its 32 interlocking tracks, indicates a significant time investment and a methodical approach required for unlocking. Similarly, iDventure's Cluebox series, like 'The Trial of Camelot', is explicitly designed as an escape room game in a box, featuring a series of captivating puzzles that typically take 60-90 minutes to solve. The Puzzle Potato Tesla Box stands out with its electro-mechanical puzzles, which often introduce a novel dimension to problem-solving compared to purely mechanical wooden puzzles. When evaluating, consider the age and experience level of the intended user, as the 'mind-boggling' nature of some puzzles might be overwhelming for younger children or those new to complex brain teasers.

Reusability and Gifting Potential

Another key consideration is whether the puzzle box offers reusability and if it's suitable as a gift. Storage boxes from IRIS USA are inherently reusable, serving their organizational purpose indefinitely. For brain teaser puzzle boxes, reusability is a significant differentiator. The iDventure Cluebox, for instance, explicitly states it is a 'Reusable Brain Games' item, meaning it can be reset and passed on to others or replayed after a period. This feature adds considerable value, particularly for escape room enthusiasts. Many puzzle boxes, including those from onietoiy and PUZZLE POTATO, are also designed with gifting in mind, often featuring unique aesthetics or the capacity to hold a surprise inside, like cash or a gift card. The ability to reset the puzzle or use it as a creative gift presentation enhances its overall appeal and extends its lifespan beyond a single solve.

Pros & Cons

IRIS USA Board Game Storage Craft Organizer Box with Snap-Tight Latch Lid, 10-Pack Portable Plastic Case Bin for Puzzles, Magazines, Hobbies, Art Supplies, Fits 8.5" x 11" & A4 Papers, Slim, Clear

Pros

  • Clear design allows for quick identification of contents, enhancing efficiency.
  • Snap-tight latch lid provides secure closure, preventing items from spilling.
  • Modular design facilitates stacking and organization within various storage spaces.

Cons

  • Primarily a storage solution, offering no puzzle-solving challenge.
  • Plastic construction, while durable, may not offer the aesthetic appeal of wooden boxes.

Puzzle Potato Tesla Box - Electronic Puzzle Box - Escape Room Game in a Box - Brain Teaser - 3D Wooden Puzzle for Adults - Money Puzzle Box for Cash Gift - Birthday GiftBox MoneyBox

Pros

  • Combines electronic and mechanical puzzles, offering a unique and diverse challenge.
  • Provides an immersive 'escape room in a box' experience, suitable for group engagement.
  • Features a compelling narrative (Nikola Tesla's lost invention) that enhances gameplay.

Cons

  • The electronic components may introduce a higher potential for technical issues compared to purely mechanical puzzles.
  • Complexity might be overwhelming for users seeking a simpler, more straightforward puzzle experience.

Onietoiy Big 32 Steps Wooden Secret Puzzle Box Toys Beech Wood Money Holder Handmade Storage Brain Teaser Unlocking Games Retro Compartment Thinking Toy Mysterious Birthday Gift for Kids and Adults

Pros

  • Crafted from high-quality beech wood, providing a durable and aesthetically pleasing construction.
  • Offers a substantial challenge with 32 distinct steps for unlocking, requiring focused problem-solving.
  • Retro design and capacity to hold a gift make it a unique presentation for cash or small items.

Cons

  • The intricate 32-step mechanism can be time-consuming and potentially frustrating for some users.
  • Being a physical manipulation puzzle, it lacks the narrative depth or electronic elements found in some other puzzle boxes.

Common Mistakes to Avoid

Confusing Storage with Engagement

A common pitfall is mistaking a puzzle box designed for storage with one intended for mental engagement. Products like the IRIS USA Board Game Storage are clearly labeled as organizers for puzzles or craft supplies, featuring a 'snap-tight latch lid' for practicality. These are not brain teasers. Conversely, items like the Puzzle Potato Tesla Box or the iDventure Cluebox are explicitly 'electronic puzzle boxes' or 'escape room puzzle boxes' designed for solving, not for storing a collection of jigsaw pieces.

Overlooking Complexity and Skill Level

Users sometimes underestimate the challenge level. For instance, the Onietoiy Big 32 Steps Wooden Secret Puzzle Box explicitly states it requires moving '32pcs of the wood tracks' to unlock. This indicates a significant time commitment and a high degree of patience, which may not be suitable for casual users or younger children. Failing to consider the stated complexity can lead to frustration and a less satisfying experience.

Ignoring Reusability for Gifting

When purchasing a puzzle box as a gift, especially for an enthusiast, neglecting its reusability can be a mistake. The iDventure Cluebox, for example, highlights its 'Reusable Brain Games' feature, allowing it to be reset and enjoyed by multiple people or at different times. Other puzzle boxes, while offering a rewarding solve, might be less explicitly designed for repeated play, which could limit their long-term value as a shared experience or a collectible item.

Disregarding Material and Craftsmanship for Brain Teasers

The quality of materials and construction significantly impacts the solving experience for intricate puzzle boxes. A wooden puzzle box, such as the Onietoiy model made from 'high quality beech wood', typically provides a more tactile and durable experience than cheaper alternatives. Poor craftsmanship in a complex puzzle can lead to sticking parts or a frustrating lack of precision, hindering the intended challenge. It is crucial to consider the stated material quality, as it directly influences the longevity and playability of the puzzle.

Frequently Asked Questions

What is the fundamental difference between storage-focused and brain-teaser puzzle boxes?
Storage-focused puzzle boxes, like those from IRIS USA, are designed for organizing and protecting items with simple latches. Brain-teaser puzzle boxes, such as the Puzzle Potato Tesla Box or iDventure Cluebox, are intricate devices requiring a sequence of steps or puzzles to open, intended for mental challenge.
Are electronic puzzle boxes, like the Puzzle Potato Tesla Box, significantly more challenging than traditional wooden ones?
Electronic puzzle boxes often introduce a different type of challenge, combining mechanical elements with circuitry and sometimes lights or sounds. While not inherently 'more' challenging, they offer a distinct problem-solving experience that can differ significantly from the purely physical manipulation of a wooden puzzle box like the Onietoiy 32-step design.
Can escape room puzzle boxes, such as the iDventure Cluebox 'The Trial of Camelot', be reset and played multiple times?
Yes, the iDventure Cluebox specifically states it offers 'Reusable Brain Games'. This means that after solving, the puzzle can be reset to its initial state, allowing others to experience the challenge or for the original solver to revisit it after a period.
What does '32 Steps' imply for a wooden puzzle box, like the Onietoiy model?
The '32 Steps' for the Onietoiy wooden puzzle box indicates a highly intricate unlocking mechanism involving a sequence of 32 distinct movements or manipulations of its internal wooden tracks. This suggests a significant level of complexity and requires methodical problem-solving to open the box.
What materials are commonly used for brain teaser puzzle boxes, and how does this affect durability?
Brain teaser puzzle boxes commonly use wood (e.g., beech wood for Onietoiy, various woods for iDventure) for its durability, tactile feel, and aesthetic appeal. Some, like the Puzzle Potato Tesla Box, integrate wood with electronic components. High-quality wood generally ensures longevity and withstands repeated handling during the solving process.