Here is another practical takedown method.
Place one palm on the back of your partner’s shoulder and the other on the side of his chin. Apply pressure with both hands simultaneously towards each other. Twisting of the neck will make him go down.
CAUTION: It is easy to snap the neck this way. While training, keep your pressure gentle and slow. In reality, if you have to accelerate, remain responsible.
More of takedowns at the upcoming Systema Camp 2020: