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Join a contest and put your physics skills to the test

TitleStatusStartEnd
Gnit Weekly Challenge Advanced 002 (GWCA002)

## Important Notes This contest is not English-language. This contest is a 60-minute individual competition. Please submit your answers to each problem within the time limit. The questions aren't necessarily arranged in order of difficulty. Skip any questions you don't know the answer to. ### Difficulty Level This contest is approximately the same difficulty level as the Gnit Elite Open (GEO). ### Answer Guidelines * Please submit your answers according to the format specified in the problem statement. * Gnit uses natural number matching for exact matches. Therefore, alternative solutions due to different rounding methods will not be accepted. * While values ​​are sometimes rounded to match significant figures in physics, in this contest, please do not round intermediate or final results unless specifically instructed. * You can submit a maximum of 10 times per problem. Submissions beyond the 11th will not be accepted. * To prevent users from substituting arbitrary values ​​to get the correct answer, the numbers may be intentionally made complex. The use of a calculator is strongly recommended. ### Available Items * Calculator * Scratch paper ### Prohibited Actions The following actions are prohibited: * Use of AI generation tools * Referencing solutions from textbooks, reference books, or web searches * Consulting with others * Sharing solutions, hints, or answers with others * Participating with multiple accounts, impersonation, or other fraudulent methods If fraudulent activity is discovered, scores may be invalidated in accordance with the terms of service. ### About this Contest This contest is the Advanced contest of the Gnit Weekly Challenge, held every Wednesday. It consists of 4 questions, with a maximum difficulty of **10** and a minimum difficulty of **6**. We hope you will use it for review or as a warm-up. ### About Rated / Unrated This contest is an Unrated contest. ### Problem Creator * admin02

Upcoming2026/08/12 21:002026/08/12 22:00
Gnit Weekly Challenge Standard 003 (GWCS003)

## Important Notes This contest is **not** in English. This contest is a 45-minute individual competition. Please submit your answer to each problem within the time limit. ### Difficulty Level This contest is approximately mid-level difficulty for the Gnit Standard Open (GSO). ### Answer Guidelines * Please submit your answer according to the format specified in the problem statement. * Gnit uses natural number matching for exact match. Therefore, alternative solutions due to different rounding methods will not be accepted. * While values ​​are sometimes rounded to match significant figures in physics, in this contest, please do not round intermediate or final results unless specifically instructed. * You can submit a maximum of 10 times per problem. Submissions beyond the 11th will not be accepted. * To prevent users from substituting arbitrary values ​​to get the correct answer, the numbers may be intentionally made complex. The use of a calculator is strongly recommended. ### Available Items * Calculator * Scratch paper ### Prohibited Actions The following actions are prohibited: * Use of AI generation tools * Referencing solutions from textbooks, reference books, or web searches * Consulting with others * Sharing solutions, hints, or answers with others * Participating with multiple accounts, impersonation, or other fraudulent methods If fraudulent activity is discovered, scores may be invalidated in accordance with the terms of service. ### About this Contest This contest is the Standard contest of the Gnit Weekly Challenge, held every Wednesday. It consists of 6 questions, with a maximum difficulty of **7** and a minimum difficulty of **3**. We hope you will use it for review or as a warm-up. ### About Rated / Unrated This contest is an Unrated contest. ### Question Creator * admin02

Upcoming2026/08/04 21:002026/08/04 21:45
Gnit Weekly Challenge Advanced 001 (GWCA001)

## Important Notes This contest is in English. This contest is a 60-minute individual competition. Please submit your answers to each problem within the time limit. ### Difficulty Level This contest is approximately the same difficulty level as the Gnit Elite Open (GEO). ### Answer Guidelines * Please submit your answers according to the format specified in the problem statement. * Gnit uses natural number matching for exact matches. Therefore, alternative solutions due to different rounding methods will not be accepted. * While values ​​are sometimes rounded to match significant figures in physics, in this contest, please do not round intermediate or final results unless specifically instructed. * You can submit a maximum of 10 times per problem. Submissions beyond the 11th will not be accepted. * To prevent users from substituting arbitrary values ​​to get the correct answer, the numbers may be intentionally made complex. The use of a calculator is strongly recommended. ### Available Items * Calculator * Scratch paper ### Prohibited Actions The following actions are prohibited: * Use of AI generation tools * Referencing solutions from textbooks, reference books, or web searches * Consulting with others * Sharing solutions, hints, or answers with others * Participating with multiple accounts, impersonation, or other fraudulent methods If fraudulent activity is discovered, scores may be invalidated in accordance with the terms of service. ### About this Contest This contest is the Advanced contest of the Gnit Weekly Challenge, held every Wednesday. It consists of 6 questions, with a maximum difficulty of **10** and a minimum difficulty of **6**. We hope you will use it for review or as a warm-up. ### About Rated / Unrated This contest is an Unrated contest. ### Problem Creator * admin02

Upcoming2026/07/29 21:002026/07/29 22:00
Gnit EliteOpen 003 (GEO003)

## Contest Rules This contest is a 90-minute individual contest. ### Submissions * Submit your answers in the format shown in each problem statement. * Gnit checks answers by exact match with a natural number. Because of this, different answers caused by rounding are not accepted. * In physics, you may often round values based on significant figures. In this contest, do not round intermediate values or final results unless the problem statement tells you to do so. * You can submit an answer up to 10 times for each problem. The 11th and later submissions will not be accepted. * Some numbers may be complex to prevent guessing. Please use a calculator. ### You may use * A calculator * Scratch paper ### You may not use * AI tools * Textbooks or reference books * Web search * Help from other people * Sharing solutions, hints, or answers with others * Multiple accounts, impersonation, or any other unfair method If cheating is found, your score may become invalid under the Terms of Service. ### Rated / Unrated This contest will be Rated only if there are 20 or more Rated participants. If there are 19 or fewer Rated participants, the contest will be Unrated.

Upcoming2026/07/26 21:002026/07/26 22:30
Gnit Weekly Challenge Standard 002 (GWCS002)

## Important Notes This contest is in English. This contest is a 45-minute individual competition. Please submit your answer to each problem within the time limit. ### Difficulty Level This contest is approximately mid-level difficulty for the Gnit Standard Open (GSO). ### Answer Guidelines * Please submit your answer according to the format specified in the problem statement. * Gnit uses natural number matching for exact match. Therefore, alternative solutions due to different rounding methods will not be accepted. * While values ​​are sometimes rounded to match significant figures in physics, in this contest, please do not round intermediate or final results unless specifically instructed. * You can submit a maximum of 10 times per problem. Submissions beyond the 11th will not be accepted. * To prevent players from substituting arbitrary values ​​to get the correct answer, the numbers may be intentionally made complex. The use of a calculator is strongly recommended. ### Available Items * Calculator * Scratch paper ### Prohibited Actions The following actions are prohibited: * Use of AI generation tools * Referencing solutions from textbooks, reference books, or web searches * Consulting with others * Sharing solutions, hints, or answers with others * Participating with multiple accounts, impersonation, or other fraudulent methods If fraudulent activity is discovered, scores may be invalidated in accordance with the terms of service. ### About this Contest This contest is the Standard contest of the Gnit Weekly Challenge, held every Wednesday. It consists of 6 questions, with a maximum difficulty of **7** and a minimum difficulty of **3**. We hope you will use it for review or as a warm-up. ### About Rated / Unrated This contest is an Unrated contest. ### Question Creator * admin02

Upcoming2026/07/22 21:002026/07/22 21:45
Gnit Beginner Open 003 (GBO003)

## Contest Rules This contest is a 60-minute individual contest. ### Submissions * Submit your answers in the format shown in each problem statement. * Gnit checks answers by exact match with a natural number. Because of this, different answers caused by rounding are not accepted. * In physics, you may often round values based on significant figures. In this contest, do not round intermediate values or final results unless the problem statement tells you to do so. * You can submit an answer up to 10 times for each problem. The 11th and later submissions will not be accepted. * Some numbers may be complex to prevent guessing. Please use a calculator. ### You may use * A calculator * Scratch paper ### You may not use * AI tools * Textbooks or reference books * Web search * Help from other people * Sharing solutions, hints, or answers with others * Multiple accounts, impersonation, or any other unfair method If cheating is found, your score may become invalid under the Terms of Service. ### Rated / Unrated This contest will be Rated only if there are 20 or more Rated participants. If there are 19 or fewer Rated participants, the contest will be Unrated.

Finished2026/07/19 21:002026/07/19 22:00
Gnit Weekly Challenge Beginner 004 (GWCB004)

## Important Notes This contest is conducted in English. This contest is a 30-minute individual competition. Please submit your solutions to each problem within the time limit. ### Difficulty Level This contest is at the difficulty level of the Gnit Beginner Open (GBO). While it is primarily intended for middle and high school students, anyone is welcome to participate. ### Submissions * Please submit your solutions in the format specified in the problem statement. * Gnit performs exact matching based on natural numbers. Therefore, alternative solutions resulting from different rounding methods will not be accepted. * While values are sometimes rounded to significant figures in physics, please do not round intermediate calculations or final results in this contest unless specifically instructed to do so. * You may submit a solution up to 10 times per problem. Submissions beyond the 11th attempt will not be accepted. * To prevent participants from guessing the correct answer by plugging in arbitrary values, some problems may intentionally use complex numerical expressions. We strongly recommend using a calculator. ### Permitted Items * Calculator * Scratch paper ### Prohibited Actions The following actions are prohibited: * Use of generative AI tools * Referencing solution methods from textbooks, reference books, or web searches * Consulting with others * Sharing solutions, hints, or answers with others * Participating using multiple accounts, impersonation, or other fraudulent methods If cheating is discovered, your results may be invalidated in accordance with the Terms of Service. ### About This Contest This contest is the Beginner edition of the Gnit Weekly Challenge, held every Wednesday. It consists of 4 problems in total, and the maximum difficulty level for Gnit Weekly Challenge Beginner is **5**. We hope you’ll use this contest for review or as a warm-up. ### Rated / Unrated This is an Unrated contest. ### Problem Setters * admin02 * なび〜

Finished2026/07/15 21:002026/07/15 21:30
Gnit Weekly Challenge Standard 001 for literature (GWCS001) physics literature cup

## Important Notes This contest is a 90-minute individual competition. Please submit your answers to each problem within the time limit. This contest includes literary elements. Since it also tests your reading comprehension, the contest duration is relatively long. This contest is not available in English. (This is to prevent the literary elements from being compromised and to avoid contradictions in the text.) ### Difficulty Level This contest is rated at the mid-to-late level of the Gnit Standard Open (GSO). ### Submissions * Please submit your answers in the format specified in the problem statement. * Gnit uses exact matching based on natural numbers. Therefore, alternative solutions resulting from different rounding methods will not be accepted. * While values are sometimes rounded to significant figures in physics, please do not round intermediate calculations or final results in this contest unless specifically instructed to do so. * You may submit a solution up to 10 times per problem. Submissions beyond the 10th attempt will not be accepted. * To prevent participants from guessing the correct answer by plugging in arbitrary values, some problems may intentionally use complex numerical values. We strongly recommend using a calculator. ### Permitted Items * Calculator * Scratch paper ### Prohibited Actions The following actions are prohibited: * Use of generative AI tools * Referencing solution methods from textbooks, reference books, or web searches * Consulting with others * Sharing solution methods, hints, or answers with others * Participating using multiple accounts, impersonation, or other fraudulent methods If cheating is discovered, your results may be invalidated in accordance with the Terms of Service. ### About This Contest This contest is the Standard contest of the Gnit Weekly Challenge, held every Wednesday. It consists of 5 problems in total, and the maximum Difficulty level for Gnit Weekly Challenge Standard is **7**. The minimum Difficulty level is **3**. We hope you’ll use this contest for review or as a warm-up. ### About Rated / Unrated This contest is an Unrated contest. ### Problem Setter * admin02

Finished2026/07/12 21:002026/07/12 22:30
Gnit Weekly Challenge Beginner 003 (GWCB003)

## Important Notes This contest is conducted in English. This contest is a 30-minute individual competition. Please submit your solutions to each problem within the time limit. ### Difficulty Level This contest is at the difficulty level of the Gnit Beginner Open (GBO). While it is primarily intended for middle and high school students, anyone is welcome to participate. ### Submissions * Please submit your solutions in the format specified in the problem statement. * Gnit performs exact matching based on natural numbers. Therefore, alternative solutions resulting from different rounding methods will not be accepted. * While values are sometimes rounded to significant figures in physics, please do not round intermediate calculations or final results in this contest unless specifically instructed to do so. * You may submit a solution up to 10 times per problem. Submissions beyond the 11th attempt will not be accepted. * To prevent participants from guessing the correct answer by plugging in arbitrary values, some problems may intentionally use complex numerical expressions. We strongly recommend using a calculator. ### Permitted Items * Calculator * Scratch paper ### Prohibited Actions The following actions are prohibited: * Use of generative AI tools * Referencing solution methods from textbooks, reference books, or web searches * Consulting with others * Sharing solutions, hints, or answers with others * Participating using multiple accounts, impersonation, or other fraudulent methods If cheating is discovered, your results may be invalidated in accordance with the Terms of Service. ### About This Contest This contest is the Beginner edition of the Gnit Weekly Challenge, held every Wednesday. It consists of 4 problems in total, and the maximum difficulty level for Gnit Weekly Challenge Beginner is **5**. We hope you’ll use this contest for review or as a warm-up. ### Rated / Unrated This is an Unrated contest. ### Problem Setters * admin02

Finished2026/07/08 21:002026/07/08 21:30
Gnit Practice Open 001 for physics literature practice (GPO001)

## Important Notes This contest is a practice contest for the GWCS001 Physics and Literature Cup. (The GPO contest is not always a practice contest for GWC.) This contest is a 60-minute individual competition. Please submit your answers to each problem within the time limit. The problems in this contest are only available in Japanese because the problem statements were too long to translate. There are special rules. Please follow them strictly. ## Special Rules For the first 30 minutes (20:30~21:00): Web searches, generative AI, and **browsing** textbooks and reference books are prohibited (same as GBO, GSO, GEO, etc.) From the first 30 minutes to the end (21:00~21:30): **Only browsing textbooks and reference books is permitted**. **Otherwise, the same rules as GBO, GSO, and GEO apply**. AI and web searches are prohibited throughout the entire contest. ### About the Solution * Please submit your solution according to the format specified in the problem statement. * Gnit uses natural numbers for exact match checking. Therefore, alternative solutions due to differences in rounding methods will not be accepted. * While values ​​are sometimes rounded to match significant figures in physics, in this contest, please do not round intermediate or final results unless specifically instructed. * You may submit a maximum of 10 answers per problem. Submissions beyond the 11th will not be accepted. * The numbers may be intentionally made complex to prevent users from substituting arbitrary values ​​to get the correct answer. The use of a calculator is strongly recommended. ### Items Allowed * Calculator * Scratch paper ### Prohibited Actions The following actions are prohibited: * Use of generation AI tools * Referencing solutions from textbooks, reference books, web searches, etc. (prohibited only for the first 30 minutes) * Consulting with others * Sharing solutions, hints, and answers with others * Participation with multiple accounts, impersonation, or other fraudulent methods If fraudulent activity is discovered, scores may be invalidated in accordance with the terms of service. ## About Rated/Unrated This contest is an Unrated contest. ## About Gnit Practice Open This contest is a practice contest for Gnit contests such as GBO, GSO, GEO, and GWC. A wide variety of Gnit-style problems, from basic to advanced, will be presented. ### About Scoring Scoring is simplified: $$100 \times \text{diff}$$ In other words, the second problem is the most difficult. ### Problem Creator * admin02 ### Regarding Question Submissions https://x.com/seed_script Please send a direct message here. We will make an announcement if there are any problems.

Finished2026/07/06 20:302026/07/06 21:30
Gnit Standard Open 007 (GSO007)

## Contest Rules This contest is a 90-minute individual contest. ### Submissions * Submit your answers in the format shown in each problem statement. * Gnit checks answers by exact match with a natural number. Because of this, different answers caused by rounding are not accepted. * In physics, you may often round values based on significant figures. In this contest, do not round intermediate values or final results unless the problem statement tells you to do so. * You can submit an answer up to 10 times for each problem. The 11th and later submissions will not be accepted. * Some numbers may be complex to prevent guessing. Please use a calculator. ### You may use * A calculator * Scratch paper ### You may not use * AI tools * Textbooks or reference books * Web search * Help from other people * Sharing solutions, hints, or answers with others * Multiple accounts, impersonation, or any other unfair method If cheating is found, your score may become invalid under the Terms of Service. ### Rated / Unrated This contest will be Rated only if there are 20 or more Rated participants. If there are 19 or fewer Rated participants, the contest will be Unrated.

Finished2026/07/05 21:002026/07/05 22:30
Gnit Weekly Challenge Beginner 002 (GWCB002)

## Important Notes This is a 30-minute individual competition. Please submit your answers for each problem within the time limit. ### Difficulty Level The difficulty of this contest is comparable to the Gnit Beginner Open (GBO). While primarily aimed at junior high and high school students, anyone is welcome to participate. ### Answers * Please submit your answers in the format specified in the problem statement. * Gnit uses exact-match checking based on natural numbers; therefore, alternative answers resulting from different rounding methods are not accepted. * Although values ​​in physics are sometimes rounded to match significant figures, please do not round intermediate calculations or final results in this contest unless specifically instructed to do so. * You may submit answers up to 10 times per problem. Submissions beyond the 10th attempt will not be accepted. * Numerical values ​​may be intentionally complex to prevent guessing the correct answer by substituting arbitrary values. The use of a calculator is strongly recommended. ### Permitted Items * Calculator * Scratch paper ### Prohibited Actions The following actions are prohibited: * Using generative AI tools * Consulting textbooks, reference materials, or web searches for solutions * Consulting others * Sharing solutions, hints, or answers with others * Participating via multiple accounts, impersonation, or other dishonest means If any misconduct is discovered, your results may be invalidated in accordance with the Terms of Service. ### About This Contest This is the "Beginner" edition of the Gnit Weekly Challenge, held every Wednesday. The contest consists of four problems, with a maximum difficulty level of **5** for the Gnit Weekly Challenge Beginner series. We hope you use this contest for review or as a warm-up. ### Rated / Unrated Status This is an unrated contest. ### Problem Creators * admin02

Finished2026/07/01 21:002026/07/01 21:30
Gnit Elite Open 002 (GEO002)

- Time limit: 90 minutes. This is an individual contest. - **Target**: This contest is designed for those who have mastered high school physics and beyond. It includes university-level topics, but anyone is welcome to participate. - **OK to use**: Textbooks, reference books, calculators, and scratch paper. - **Not allowed**: AI tools, Web search, or talking with others. - Cheating will make your score invalid. - **Note**: The calculations are complex. **Please use a calculator**.

Finished2026/06/28 21:002026/06/28 22:30
Gnit Weekly Challenge Beginner 001 (GWCB001)

### This contest is classified as unofficial due to a configuration error regarding the modification of problem slugs. #### It has now been corrected to the right problem. - This contest is a 30-minute individual competition. - **Target**: This contest is slightly easier than GBO and is primarily aimed at junior and senior high school students (junior high school physics, basic high school physics). Anyone can participate, including university students and working adults. - **OK to use**: Use of calculators and scratch paper. - **Not allowed**: Use of generation AI tools, cheating by referring to textbooks or web searches, consulting with others or sharing solutions. - *If cheating is discovered, scores will be invalidated according to the terms of service.* - *To prevent correct answers by substituting arbitrary values, the numbers may be intentionally made complex. **We strongly recommend using a calculator.**

Finished2026/06/25 21:002026/06/25 21:30
Gnit Beginner Open 002 (GBO002)

- Time limit: 60 minutes. This is an individual contest. - **Target**: This contest is at a basic level designed for junior high and high school students, but anyone is welcome to participate (including university students and adults). - **OK to use**: Calculators, scratch paper. - **Not allowed**: AI tools, Web search, Textbooks, or talking with others. - Cheating will make your score invalid. - **Note**: The calculations are complex. **Please use a calculator**.

Finished2026/06/07 21:002026/06/07 22:00
Gnit Standard Open 006 (GSO006)

- Time limit: 90 minutes. This is an individual contest. - **OK to use**: Calculators, scratch paper. - **Not allowed**: AI tools, Web search, Textbooks, or talking with others. - Cheating will make your score invalid. - **Note**: The calculations are complex. **Please use a calculator**.

Finished2026/05/31 20:302026/05/31 22:00
Gnit Standard Open 005 (GSO005)

- Time limit: 90 minutes. This is an individual contest. - **OK to use**: Calculators, scratch paper. - **Not allowed**: AI tools, Web search, Textbooks, or talking with others. - Cheating will make your score invalid. - **Note**: The calculations are complex. **Please use a calculator**.

Finished2026/05/17 20:302026/05/17 22:00
Gnit Elite Open 001 (GEO001)

- Time limit: 60 minutes. This is an individual contest. - **Target**: This contest is designed for those who have mastered high school physics and beyond. It includes university-level topics, but anyone is welcome to participate. - **OK to use**: Textbooks, reference books, calculators, and scratch paper. - **Not allowed**: AI tools, Web search, or talking with others. - Cheating will make your score invalid. - **Note**: The calculations are complex. **Please use a calculator**.

Finished2026/05/06 21:002026/05/06 22:00
Gnit Beginner Open 001 (GBO001)

- Time limit: 60 minutes. This is an individual contest. - **Target**: This contest is at a basic level designed for junior high and high school students, but anyone is welcome to participate (including university students and adults). - **OK to use**: Calculators, scratch paper. - **Not allowed**: AI tools, Web search, Textbooks, or talking with others. - Cheating will make your score invalid. - **Note**: The calculations are complex. **Please use a calculator**.

Finished2026/05/04 21:002026/05/04 22:00
Gnit Sunday Open 004 (GSO004)

- Time limit: 90 minutes. This is an individual contest. - **OK to use**: Calculators, scratch paper. - **Not allowed**: AI tools, Web search, Textbooks, or talking with others. - Cheating will make your score invalid. - **Note**: The calculations are complex. **Please use a calculator**.

Finished2026/04/19 19:302026/04/19 21:00
Gnit Sunday Open 003 (GSO003)

- Time limit: 90 minutes. This is an individual contest. - **OK to use**: Calculators, scratch paper. - **Not allowed**: AI tools, Web search, Textbooks, or talking with others. - Cheating will make your score invalid. - **Note**: The calculations are complex. **Please use a calculator**.

Finished2026/04/05 19:302026/04/05 21:00
Gnit Sunday Open 002 (GSO002)

- Time limit: 90 minutes. This is an individual contest. - **OK to use**: Calculators, scratch paper. - **Not allowed**: AI tools, Web search, Textbooks, or talking with others. - Cheating will make your score invalid. - **Note**: The calculations are complex. **Please use a calculator**.

Finished2026/03/22 19:302026/03/22 21:00
Gnit Sunday Open 001 (GSO001)

- Time limit: 90 minutes. This is an individual contest. - **OK to use**: Calculators, scratch paper. - **Not allowed**: AI tools, Web search, Textbooks, or talking with others. - Cheating will make your score invalid. - **Note**: The calculations are complex. **Please use a calculator**.

Finished2026/03/08 19:302026/03/08 21:00
Gnit Sunday Open 000

- Time limit: 90 minutes. This is an individual contest. - **OK to use**: Calculators, scratch paper. - **Not allowed**: AI tools, Web search, Textbooks, or talking with others. - Cheating will make your score invalid. - **Note**: The calculations are complex. **Please use a calculator**.

Finished2026/02/15 19:302026/02/15 21:00