Different retro moves are also possible for mirror positions.
Play 1.32-28 18-22 2.37-32 12-18 3.41-37 7-12 4.46-41 1-7 5.34-29 19-23 6.28x19 14x34. The Board Window shows the following position:
The Book Window looks like this:
There are two retro moves. The current board position arises 4206 times from the position before 14x34 and 359 times from 23x34.
It is not easy to see that 23x34 can be played as the last move.
To check how this is possible right-click the move 23x34 and choose Retro Line.
