Simple but addictive! The Stick-out of brain training puzzle playing only with 〇 and ×! Simple logical puzzle with easy rules, filling 〇 and× in the cells ! There are 1000 quiz in 4 difficulties levels, try gradually the more difficult one, then fully enjoy the depth of LOGIC PUZZLE ! 【Rules for 〇× LOGIC PUZZLE】 ①Fill the same numbers of 〇 and ×in columns and rows. ②No more than 2 same symbols, ③No same filling patterns with other columns/rows.