How to use "drag & drop" on websites? I use the adroid stock-browser and I'd like to play chess using e.g. http://www.shredderchess.de/schachproblem-des-tages.html Unfortunately you have to drag and drop the pawns. I tried several gestures, but I was not able to use the drag and drop feature. Do I have to change any options (where?) or should I use a different browser?
Pair a Bluetooth mouse with your device. YouTube is full of demonstration videos such as this video by Android Tech Tips.

Or use an OTG mouse, as demonstrated in this video by XDA Developers.