Sudoku & Go

数独 & 五子棋 is a 2-in-1 puzzle game for the NES/Famicom console, developed and published by Nanjing Technology (南晶科技). Gameplay offers two classic games in one cartridge: Sudoku puzzles on 9x9 grids with standard rules for filling 1-9 numbers uniquely in rows, columns, and subgrids, plus Gomoku (five-in-a-row) where players place stones to get five in a row on a 15x15 board. Game modes include single-player puzzles and time trials for Sudoku, plus versus or single-player modes for five-in-a-row. No named characters; it is a pure logic title. It stands out as a compact 2-in-1 retro compilation that combines brain-training Sudoku with competitive strategy.