Who Invented Petrus Method?

Speedcubing is the competitive pursuit of solving the Rubik’s Cube as quickly as possible. In speedcubing, various methods are utilized to efficiently solve the cube. These methods involve specific algorithms, strategies, and sequences of moves to achieve faster solving times. The Petrus method is one of the prominent solving methods employed in speedcubing. It is named after its creator, Lars Petrus, who developed the method in the 1980s. It gained significant popularity within the speedcubing community due to its unique approach and solving techniques. It offers an alternative and efficient way of solving the Rubik’s Cube by focusing on block building and fewer move sequences.

Exploring the individual, Lars Petrus, who invented and developed the method, provides insights into the methodology and techniques involved. Understanding the origin and development of the Petrus method contributes to a deeper appreciation of its impact on the speedcubing community and its growing popularity among cubers.

The Inventor of the Petrus Method

The Petrus method was invented by Lars Petrus, a Swedish speedcuber and computer scientist. Lars Petrus is recognized as the creator of the method and has made significant contributions to the speedcubing community through his innovative approach to solving the Rubik’s Cube.

Background and expertise of the inventor

Lars Petrus was born in Sweden in 1963. He developed an interest in puzzles and problem-solving from a young age, eventually leading him to speedcubing. With his background in computer science, Petrus possessed a unique perspective that influenced his approach to solving the Rubik’s Cube.

As a computer scientist, Petrus had a deep understanding of algorithms, patterns, and efficient problem-solving techniques. This knowledge and expertise allowed him to approach the Rubik’s Cube as a puzzle that could be solved using logical strategies and mathematical principles. Lars Petrus developed the this method with the intention of creating a solving method that was efficient, intuitive, and required fewer moves compared to existing methods. His motivation was to find a method that could optimize solving times and provide an alternative to the popular CFOP method.

Petrus was driven by the desire to push the boundaries of speedcubing and explore new solving techniques. He sought to challenge the conventional approaches to solving the Rubik’s Cube and introduce a method that emphasized efficiency and simplicity.

In his pursuit of creating the method, Lars Petrus drew inspiration from his background in computer science and applied his analytical skills to develop a systematic and optimized solving method. His goal was to create a method that could be easily understood and implemented by speedcubers of all skill levels while still delivering competitive solving times. By combining his passion for puzzles, knowledge of algorithms, and dedication to speedcubing, Lars Petrus successfully created the Petrus method, which has since gained recognition and popularity within the speedcubing community.

Principles and Techniques

The Petrus method is a popular solving method for the Rubik’s Cube that emphasizes block building, efficient piece placement, and intuitive algorithms. It is named after its inventor, Lars Petrus. The method is characterized by its systematic approach and its ability to achieve fast solves with fewer moves compared to other methods. The key principles and concepts of the Petrus method include:

  1. Block Building: It focuses on building blocks or groups of pieces instead of solving the cube layer by layer. By creating stable and well-positioned blocks, the solver gains better control over the cube’s state and can efficiently progress through the solve.
  2. Key Piece Placement: The method places particular emphasis on the efficient placement of key pieces during the solving process. Key pieces, such as edges and corners, are strategically positioned early on to minimize later moves and optimize the overall solve. This approach contributes to the method’s efficiency and faster solving times.
  3. Intuitive Algorithms: It relies on intuitive algorithms, which are algorithms that can be derived on the spot based on the solver’s understanding of the cube’s state. These algorithms are typically easy to memorize and involve minimal moves, promoting efficient solving.

Explanation of the main stages in the Petrus method

  1. Block Building: The first stage of this method involves building blocks on different sides of the cube. The solver strategically places pieces to create these blocks, aiming for stability and efficient piece positioning. By building blocks, the solver ensures that certain pieces are already in their correct locations, reducing the number of moves required later in the solve.
  2. Insertion: Once the initial blocks are constructed, the solver focuses on inserting the remaining pieces into their correct positions. This stage involves intuitive moves and algorithms to insert edges and corners into their respective layers while maintaining the integrity of the previously built blocks.
  3. Last Layer: The final stage of the this method is the Last Layer, where the solver completes the last layer of the cube. This stage often requires a combination of intuitive algorithms and algorithms specific to the Petrus method to orient and position the last layer pieces.

Advantages of the Petrus method compared to other methods

The Petrus method offers several advantages and unique characteristics that set it apart from other solving methods:

  1. Fewer Moves: The block building approach and efficient piece placement of the Petrus method often result in fewer moves compared to other methods like CFOP or Roux. This can lead to faster solving times and improved efficiency.
  2. Intuitive Algorithms: The method relies heavily on intuitive algorithms, which are generally easier to memorize and execute compared to complex algorithms used in other methods. This makes the Petrus method more accessible to beginners and can contribute to faster learning and improvement.
  3. Flexibility: This method allows for flexibility in solving, as it offers multiple approaches and variations within its framework. Solvers can adapt the method to suit their preferences and solving style, making it a versatile choice for speedcubers.
  4. Block Preservation: The Petrus method’s emphasis on block building ensures that previously built blocks remain intact throughout the solve. This characteristic allows for efficient moves and reduces the risk of disrupting progress made in earlier stages.

It’s unique approach to block building, efficient piece placement, and intuitive algorithms have contributed to its popularity and recognition among speedcubers. While it may require additional planning and visualization compared to other methods, the Petrus method offers a rewarding solving experience with the potential for fast solves and improved efficiency.

Recognition and Spread of the Petrus Method

When Lars Petrus first introduced the Petrus method in the early 1980s, it garnered attention within the speedcubing community for its unique approach and potential for fast solving times. Although initially not as widely adopted as methods like CFOP (Fridrich) or Roux, the Petrus method gained a dedicated following among cubers who appreciated its efficiency and intuitive nature.

Role of competitions and notable achievements in popularizing the Petrus method

Competitions played a crucial role in popularizing the Petrus method and showcasing its effectiveness. As speedcubing events gained traction worldwide, cubers who utilized the Petrus method started achieving notable results and records. Their success demonstrated the method’s viability and attracted the interest of other speedcubers seeking alternative solving methods.

Notable achievements by Petrus method users helped increase its recognition. For example, Lars Vandenbergh, a prominent speedcuber, set multiple world records in the early 2000s using the Petrus method. His accomplishments brought the method into the spotlight and encouraged more cubers to explore and adopt it.

Evolution and Refinement of the Petrus Method

It has seen various iterations and improvements as cubers have experimented with different techniques and approaches. These advancements aim to enhance efficiency, reduce move count, and optimize solve times. Some notable iterations include:

  1. Blockbuilding Techniques: Cubers have developed more efficient and intuitive blockbuilding techniques within the Petrus method. These techniques involve identifying and solving multiple blocks simultaneously, minimizing unnecessary moves and improving overall efficiency.
  2. Advanced Insertion Methods: Over time, cubers have discovered more efficient ways to insert pieces into the blocks during the solving process. These advanced insertion techniques aim to minimize move count and optimize finger tricks for faster solves.

Impact and Influence of the Petrus Method

It has gained significant traction and has been widely adopted by speedcubers in competitions around the world. Its unique approach and efficient blockbuilding techniques have attracted many cubers seeking alternative solving methods. Its popularity is evident through the increasing number of competitors who choose to solve using this method in official speedcubing competitions.

Several notable speedcubers have achieved remarkable results using the Petrus method, showcasing its effectiveness and potential for achieving fast solve times. These cubers have demonstrated their skill and mastery of the method through their outstanding performances in competitions. While the specific names may vary over time, some examples of cubers who have achieved notable results using this method include world record holders, national champions, and podium finishers in various events.

The Petrus method has had a notable influence on the development of other solving methods in the speedcubing community. Its innovative approach to blockbuilding and efficient layer-wise solving has inspired cubers and influenced the way they approach puzzle solving. Its principles and techniques have served as a foundation for the development of hybrid methods and variations that combine elements of Petrus with other solving methods.

Overall, the impact and influence of the Petrus method extend beyond its direct application. It has influenced the way speedcubers approach puzzles, encouraging innovation, and pushing the boundaries of what is possible in terms of solving efficiency and speed.


The Petrus method is a blockbuilding-based solving method that has made a significant impact on the speedcubing community. Developed by Lars Petrus, it offers a unique approach to solving the Rubik’s Cube, focusing on efficient block construction, insertion techniques, and a layer-by-layer approach. The Petrus method has gained popularity due to its potential for fast solve times and its ability to challenge traditional layer-by-layer methods.

The Petrus method owes its existence and success to its inventor, Lars Petrus. His innovative thinking and exploration of different solving approaches led to the development of this method. It is important to acknowledge his contributions and dedication to the speedcubing community. Additionally, the evolution and refinement of the Petrus method have been shaped by the contributions of other speedcubers who have further developed and expanded upon its techniques and principles.

This method has made a significant impact on the speedcubing community by offering an alternative solving approach that challenges traditional methods. Its focus on blockbuilding and efficient techniques has attracted cubers looking for new ways to improve their solving speed and efficiency. It has not only been successful in its own right but has also influenced the development of other solving methods and inspired further innovation.

Looking to the future, the Petrus method is likely to continue its presence and influence within the speedcubing community. As more cubers explore and adopt this method, new insights and refinements will emerge. The Petrus method will remain an important option for speedcubers seeking a different solving experience and a pathway to improving their solving skills.

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