Long nardy as it is played from Moscow to Baku and Almaty: both sides start with all fifteen checkers on the head and travel counter-clockwise round the whole board. Nobody is hit — you win by blocking your opponent’s way and getting home first.
Your checkers start on the head, top right, and travel counter-clockwise to your home, bottom right. Your opponent's start bottom left and go the same way round, to their home top left.
After two sixes the first checker would reach the opponent’s head, where it cannot land, and the rest of the throw would be wasted. So on the first throw 6-6, 4-4 and 3-3 let a second checker start. On every later turn it is one checker from the head again.
The last quarter of a side's journey, six points. Both sides travel the same way round, from the head to their home: yours is the bottom-right quarter here, your opponent's the top-left one. You may bear off only once all fifteen are home. On this board your home is marked through your first game and lights up while you bear off.
A win before the opponent has borne off a single checker. It is worth two points instead of one. Long nardy has no koks, the triple win of the short game.
Yes, until you press Done: Undo takes back one checker at a time, the last one first. When every number is played, the turn waits for Done — or a tap on the dice.