Let us assume that your partner has obtained Nikkyo on you. Go forward, pushing your elbow into his body and turning it across his chest. Catch his thumb between your thumb and forefinger and move your left hip out. Now you will be able to catch the back of his hand with your own left hand in the Sankyo position. Draw his hand down to the mat. At the same time push your left hand downwards just above the elbow, with your body moving backwards.

When you are practising these counter-throws, try to keep you mind always going forward. If you let your mind go back it will be too late for you and his technique will win. This is the real fight in Aikido - to try to completely give yourself to him. This lets your partner feel that he has secured the technique and won. This lulls him back into a false sense of security and you will be able to counter him. If you cannot control your ego and try to show that you are the stronger by resisting him, you will lose.