Yin raced Mahjong

To all fans of mahjong - there is good news. This is good old mahjong with the new rules, now the opposite is true - you are looking for pieces not completely identical and opposite. But it is even more difficult than it might seem, it's not always possible to clearly understand what the contrast, for example - black and white is obviously, and the green down arrow and red arrow - no, but you will start to play a bit to quickly understand any combination.