九连环的每个环互相制约，只有第一环能够自由上下。要想下/上第n个环，就必须满足两个条件，第一个环除外。一、第n-1个环在架上；二、第n-1个环前面的环全部不在架上。玩九连环就是要努力满足上面的两个条件。解下九连环本质上要从后面的环开始下，而先下前面的环，是为了下后面的环，前面的环还要装上，不算是真正地取下来-Nine chain of each ring and check each other freely up and down only the first ring. To the next/first n rings, two conditions must be met, except for the first ring. I, n-1 rings on the shelf　II, n-1 rings ring in front of all the outside rack. Play nine chain is to strive to meet the above two conditions. Nine off his chain is essentially starting from the back under the ring, and the first under the front of the ring, next to the back of the ring, but also fitted with the ring in front, is not really taken off