When I bought a board with pieces made in Sweden a few years ago, the included rules stated that white wins if the King reaches a corner square. That rule should make the win ratio more equal, I suppose.
(hide) If you are waiting for your turn, click on "change" next to the "refresh" on the main page, then set refresh the page to 30 seconds to get your turn to move displayed faster. (Servant) (show all tips)