Logic Masters India (commonly abbreviated as 'LMI') is the Indian representative of the World Puzzle Federation (WPF) which is responsible for conducting national sudoku championships since 2008 to select the Indian team for the world championships. It also aims in organizing various sudoku and puzzle activities in India.[1]
There are three main contest types: Sudoku Mahabharat, Puzzle Ramayan and Daily Puzzle Test.
Each year, the Sudoku Mahabharat (SM) championship consists of 4 online rounds while the Puzzle Ramayan (PR) consists of 6 (approximately one every 2-3 weeks), based on different categories and themes of Sudoku variants (Puzzle types). The online rounds are open to all participants including international solvers.
There are 3-4 spots for the Indian A team for the World Sudoku Championship (WSC) and World Puzzle Championship (WPC), which will be decided during the offline finals of the tournaments.
Each Sudoku Mahabharat round consists of six Standard Sudokus (two 6X6, four 9X9) and six Sudoku Variants (each variant will appear in both sizes, i. e. 6X6 and 9X9).[2]
Each Puzzle Ramayan round consists of three puzzles each in 6 puzzle types within the theme (in double theme rounds, three puzzles each in 3 puzzle types within each theme) and two exploratory variant puzzles in two types within the original theme (in double theme rounds, 2 variant puzzles in one type within each theme).[3]
Participants will get points as allotted for each sudoku correctly submitted. The test uses instant grading where the solver can confirm if the solution is correct immediately after submitting. Each incorrect submission reduces the puzzle's potential score. The first, second, third, and fourth incorrect submissions reduce the potential score to 90%, 70%, 40%, and 0% respectively.[4]
| Standard & Neighbours | R. Kumaresan | 25 Feb-02 Mar 2022 | Rohan Rao | James Peter | Nityant Agarwal | |
| Odd Even & Hybrids | Madhav S. & Arun I. | 01 - 06 Apr 2022 | Kishore Kumar | Manjiri | James Peter | |
| Converse & Outside | Harmeet S. & Dhruvarajsinh P. | 22 - 27 Apr 2022 | Kishore Kumar | James Peter | Jaipal Reddy | |
| Math & Irregular | Nityant A. & James P. | 27 May - 01 Jun 2022 | Rohan Rao | Kishore Kumar | Ashish Kumar |
| Standard & Odd Even | R. Kumaresan, Hemant Malani, Arun Iyer | 20-26 Jan 2023 | James Peter | Rohan Rao | Ashish Kumar | |
| Outside & Hybrids | Nityant Agarwal, Akash Doulani, Puwar Dhruvarajsinh | 10-16 Feb 2023 | Rohan Rao | Kishore Kumar | Ashish Kumar | |
| Math & Irregular | James Peter, Madhav Sankaranarayanan, Priyam Bhushan | 03-09 Mar 2023 | Rohan Rao | Kishore Kumar | Nityant Agarwal | |
| Neighbours & Converse | Ashish Kumar, Kishore Sridharan, Pranav Kamesh S | 24-30 Mar 2023 | James Peter | Manjiri | Harsh Poddar |
| Round | Author | Dates | India 1 | India 2 | India 3 | |
|---|---|---|---|---|---|---|
| Classics | Prasanna Seshadri | 11 - 16 Feb 2022 | Swaroop Guggilam | Ashish Kumar | Rajesh Kumar | |
| Casual & Word | Amit Sowani | 18 - 23 Mar 2022 | Rakesh Rai | Rohan Rao | Swaroop Guggilam | |
| Regions & Evergreens | Ashish Kumar | 8 - 13 Apr 2022 | Swaroop Guggilam | Kishore Kumar | Rakesh Rai | |
| Number Placement & Puzz.link | Nityant Agarwal | 06 - 11 May 2022 | Ashish Kumar | Rohan Rao | Swaroop Guggilam | |
| Loops & Shading | Madhav Sankaranarayanan | 03 - 08 Jun 2022 | Rohan Rao | Ashish Kumar | Nityant Agarwal | |
| MII & Object Placement | Priyam Bhushan & Chandrachud Nanduri | 17 - 22 Jun 2022 | Rohan Rao | Ashish Kumar | Nityant Agarwal |
| Round | Author | Dates | India 1 | India 2 | India 3 | |
|---|---|---|---|---|---|---|
| Classics | Prasanna Seshadri | 13-19 Jan 2023 | ||||
| Evergreens & Rule Pool | Chandrachud Nanduri | 03-09 Feb 2023 | ||||
| Shading & Made In India | Ashish Kumar & Pranav Kamesh S | 24 Feb – 02 Mar 2023 | ||||
| Object Placement & Number Placement | Priyam Bhushan | 17-23 Mar 2023 | ||||
| Casual & Word | Madhav Sankaranarayanan | 07-13 Apr 2023 | ||||
| Regions & Loops | Nityant Agarwal | 21-27 Apr 2023 |
This contest type is online only and consists of 16 puzzles of the same type. Every puzzle will be live for 30 hours. Cumulative points from each day's solving will determine the final scores.[9]