BLDDB Documentation

Help for wherever you are on your blddb journey.

Overview

　　BLDDB ( blddb.net) is a 3BLD algorithm database including thousands of algorithms.

　　It supports simplified Chinese, English, Japanese, and is compatible with mobile phones, PCs and tablets. The website provides many options for each case, so the users can select algorithm based on their own preference.

Prerequisites

　　We recommend you know the basic principles of blindfolded solving especially commutators.

Styles

　　Corner algs include four styles:

• Nightmare Style
• Balance Style
• Yuanzi Style
• Manmade Style

　　In other modules, only Nightmare Style is provided temporarily.

Nightmare Style

　　Yifan Wang (2017WANY29) proposed the nightmare style in early 2020. In the nightmare style, there are no L layer moves. Left hand is always in home grip position and most of the operations are done by right hand. In this style, an algorithm with alternate D and D' and without D2 moves is preferred. The average move count may be longer than the traditional 3-style algorithms. However, the time in swapping between lefty-grip to righty-grip is reduced, which leads to great potential of speeding up your solve.

If you need more information, please visit the following site: https://space.bilibili.com/432235186 (mandarin)

Balance Style

　　The balanced style is based on the position-classified UFR corner alg tutorial by Yu Zou (coffee) and Zhi Qiao (Dr. Spoon) in 2022. Most of the algs contain only RUD layer moves. There are a few FB layer moves but no cube rotations, L layer or double-layer moves. Left hand is always in home grip position and most of the executions are done by right hand. Compared with the nightmare style, the balanced style focuses more on selecting beginner-friendly algorithms. Therefore, more traditional algorithms with shorter average move count are included. There are less restrictions for D layer (D2 is allowed and alternating D and D' in an alg is not a neccessary). Balanced style is named because it tries to balance between the nightmare style and the traditional one.

If you need more information, please visit the following site: https://www.bilibili.com/read/cv17499305 (mandarin)

Yuanzi Style

　　Yuanzi style is based on Mengfei Shen's alg set. This style mainly uses traditional algorithms.

Manmade Style

　　Manmade style collects lots of cubers' alg set automatically. The script runs at 00:00 on every Monday automatically. If you would like to add your 3-style sheet to blddb-manmade, you can add the link to the relevant json file and it will be synchronized the next time.

Comparison

　　Please refer to the table below for the main differences among these styles.

Modules

　　BLDDB includes the following thirteen modules.

• 3-Style Corner
• 3-Style Edge
• Corner Twist
• Edge Flip
• 3BLD Parity
• 2e2e
• LTEF
• 5-Style
• Nightmare Alg Set
• Custom Alg Set
• BigBLD Alg Set
• Lettering Scheme
• Readme

3-Style Corner

　　All the algorithms provided go inline with the nightmare style and are generated by the program. We rank the algorithms by defining "equivalent moves". There are many different parameters in calculating equivalent moves. We mainly use the nightmare algorithm set as training data, and adjust the weight parameters through the simulated annealing algorithm, so that the algorithm used in the latest nightmare algorithm set is ranked as high as possible among all the alternative algorithms. 18 algorithms with the highest ranking are displayed on the website and the one in gray is the main algorithm in the latest nightmare algorithm set.

　　Enter the letter pair (buffer included) or the position to query. There will be at most 18 algorithms provided. It also provides a commutator form and recommendation position of gripping the cube.

　　What's more, you can also switch the styles among nightmare style, balance style, yuanzi style and manmade style.

　　This is an example of manmade mode, you can click to see their original sheets.

3-Style Edge

　　3-Style Edge uses similar methods as the 3-Style Corner, but is much more complicated, so at most 100 algorithms with the highest ranking are displayed on the website.

Corner Twist

　　Corner Twist uses the similar rules as the nightmare style of 3-Style Corner.

Edge Flip

　　Edge Flip uses the similar rules as the nightmare style of 3-Style Edge.

3BLD Parity

　　3BLD Parity uses the similar rules as the nightmare style of 3-Style Corner.

2e2e

　　2e2e contains all the 2e2e and 2e2e' algorithms (5940 × 2 = 11880 cases).

LTEF

　　Here LTEF stand for last edge target + edge flip. eg. UF-xy-RU-FU, plus a flip. It contains 15840 cases.

5-Style

　　5-Style contains all the 304128 5-Style edge algorithms (all buffers).

Nightmare Alg Set

　　Nightmare Alg Set is an algorithms set based on nightmare style. It includes twelve submodules:

• 3-Style Corner
• 3-Style Edge
• Corner Twist
• Edge Flip
• Parity
• Parity with a Flip/Twist
• 2e2e
• 2c2c
• 3 Corner Twist
• 4 Edge Flip
• 5-Style Edge (UR)
• Readme

Corner algorithm set

　　This algorithm set contains algorithms for all corner 3 cycle cases (1008 cases in total). It was completed in March, 2020 by Yifan Wang with his nightmare system (latest update in June, 2022). The document is processed by Zixing Wang, satisfying the needs for all buffer blinders. All the algorithms provided use Chinese lettering scheme and have been checked completely by the program. Most of the operations are R/U/D layer moves and left hand is always set in home grip position.

　　Notice: Compared with the traditional corner algorithm set, F/B layer moves are added to avoid D2 moves and non-alternate D and D' moves, which may lead to great potential of speeding up. All algorithms provided follow with a commutator form for blinders of all level to learn and understand.

　　Recommended floating buffer learning order: UFR-UBR-UFL-UBL-DFR-DFL

Edge algorithm set

　　This algorithm set contains algorithms for all edge 3 cycle cases (1760 cases in total). It was completed in March, 2020 by Yifan Wang with his nightmare system (latest update in June, 2022). The document is processed by Zixing Wang, satisfying the needs for all buffer blinders. All the algorithms provided use Chinese lettering scheme and have been checked completely by the program. Left hand is always set in home grip position. Some traditional M layer algorithms are replaced by new algorithms with S\E layer operations.

　　Notice: Some algorithms provided are not traditional commutators. For blinders whose buffer is not in S slice (e.g. UF buffer), learning nightmare set is more difficult than traditional set.

　　Recommended floating buffer learning order: UR-UF-UL-UB-DR-DL-FR-FL-BR-DF

Advanced algorithm set

　　This algorithm set contains algorithms including parity, parity with a flip, parity with a twist, floating 2 flips, floating 2 twists, 2e2e, 2c2c, floating 3 twists, floating 4 flips and non-practical 5 style edge for UR buffer (low learning priority). It was completed in March, 2020 by Yifan Wang with his nightmare system (latest update in June, 2022). The document is processed by Zixing Wang. All the algorithms provided use Chinese lettering scheme and have been checked completely by the program. Left hand is always set in home grip position.

　　Important notice: Generally speaking, if you haven’t sub 25 on 3x3 blind, please pay more attention to the basic blind stuff rather than these advanced techniques. Basic 818 algorithms (a single corner and edge buffer) are enough for blinders to sub 30, even sub 20.

Custom Alg Set

　　Custom Alg Set includes two submodules:

• 3-Style Corner
• 3-Style Edge

3-Style Corner

　　A template spreadsheet will be generated after the user selects a corner buffer. 18 algorithms are provided for each of the cases and the user can choose his/her favorite by clicking the drop-down list. Alternatively, the user can enter algorithms manually (an add menu will appear only if the algorithm entered is correct). Once the algorithm is added, commutator form and recommended grip will be produced automatically.

　　Import Local Excel: Import a local document (format: .xlsx, .xls or .csv) into current spreadsheet.

　　Export Excel: Export current spreadsheet into an xlsx document.

　　Clear: Clear all the algorithms selected.

3-Style Edge

　　Similar to the 3-Style Corner counterpart.

BigBLD

　　BigBLD Alg Set includes five submodules:

• Wing
• X-center
• +-center
• Midge
• Lettering Scheme

　　All the algorithms are for 5BLD. Only manmade mode is available now.

Lettering Scheme

　　The Chinese lettering scheme and yellow(top)-red(front) is set as default. Speffz lettering scheme is also added. For users with a different coding system, they can modify the letter in the cube manually. Users can also change the orientation into their preferred one.

FAQ

Here are some frequently asked questions.

GitHub

Issue

　　If this documentation doesn't answer your questions, please feel free to open an issue in blddb or blddb-docs.

　　We are located in GMT+8 time zone and answer all questions within one day on weekdays. In some rare cases, the waiting time can be to two days.

Contribution

　　Pull requests are welcome for any part of this project. Please feel free to send PRs directly for typos, bug fixes, and any open issues in blddb or blddb-docs.

　　If you have any thoughts about bigger contributions, please consider filing an issue in blddb or blddb-docs to discuss it before sending a pull request.

Don't Forget to Star BLDDB

License

　　BLDDB is licensed under the GPL license (version 3 or later). This means that it is free to use, although you must publish any code that uses it (e.g. also put it on GitHub). See the full license for exact details.

　　We've selected this license in order to encourage the cubing community to work on software in a way so that everyone can contribute and extend each other's work.

　　Besides, BLDDB includes some open source components. Please refer to the table below for these open source components and licenses.

　　Many thanks go to the blinders who gave advice and suggestion on this website. We are especially grateful to Yifan Wang (2017WANY29) who proposed and developed the nightmare style and nightmare algorithm set.

Privacy & Cookies Policy

　　BLDDB is committed to protecting and respecting your privacy.

Privacy

　　We may collect information about your computer, including your IP address, operating system and browser type, for system administration and in order to create reports. This is statistical data about our users’ browsing actions and patterns, and does not identify any individual.

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What is cookies?

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What do we use cookies for?

　　Cookies and other technologies used for functionality allow you to access features that are fundamental to BLDDB including preferences, like your choice of language, lettering scheme, orientation, and product optimizations that help maintain and improve that service.

What are my options in relation to the use of cookies?

　　By using BLDDB, you agree to the use of cookies and other technologies as set out in this Privacy & Cookies Policy. If you do not agree to such use please either refrain from using the relevant website, or use incognito mode. However, in this case, some of our services may not function properly.

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