Nikoli no Sudoku 3D Dai-ni-Shuu - 8-tsu no Puzzle de 1000-Mon (日本語名: ニコリのスーパー数独3D 第弐集 8つのパズルで1000問) is a Nintendo 3DS game released in Japan in 2015. It is the second installment of the Nikoli no Sudoku 3D series and features over 1000 puzzles. The game includes both 2D and 3D versions of Sudoku puzzles, as well as puzzles that combine elements of both. Players can also customize the difficulty of each puzzle, as well as the size of the grid and the number of clues. The game features a variety of different modes, including a “Time Attack” mode, a “Link Battle” mode, and a “Daily Challenge” mode. The Time Attack mode allows players to compete against the clock to solve the puzzles as quickly as possible. The Link Battle mode allows players to compete against each other in a race to solve the puzzles. The Daily Challenge mode features a new puzzle each day that players can solve. Nikoli no Sudoku 3D Dai-ni-Shuu also features an “Expert” mode, which includes puzzles that are especially difficult. These puzzles feature more complex rules and require more advanced strategies to solve. The game also includes an in-game tutorial, which can help players learn the basics of Sudoku and the various strategies for solving puzzles. Overall, Nikoli no Sudoku 3D Dai-ni-Shuu is an enjoyable game for both experienced and novice Sudoku players. The game features a wide variety of puzzles and modes, as well as an in-game tutorial, making it a great way to learn and practice Sudoku.