逻辑益智游戏. 竞争者在未来数独！无限的困惑！也被称为 KUROMASU, KURODOKO (黒どこ).
Free to download with ads, and only one optional IAP to buy, ever! Even without the IAP you get near-infinite puzzles to play. The lone IAP removes ads and adds more variety to your puzzles by allowing for more board sizes. 9x9, 6x12 and 10x18 sizes are included. With purchase any size from 5x5 to 20x30 is possible.