围棋死活大师-级位

This might be the best Tsumego app for intermediate players. It has 6226 problems with 4 levels (Level 1: 1626. Level 2: 1305. Level 3: 1475. Level 4: 1820). None of them are for absolute beginners, and none of them are very challenging either, so very good for daily training. ————————— 非常喜歡這個app，但新手說明有處矛盾的地方。一進程序，新手說明對「死活大師」的解釋中說是1-5段，但是具體難度介紹部分確是10-1級。雖然完全不影響使用，不過還是希望能更正一下。