ADJUDICATION by Zoltán Nemeth (AC, g19) as follows, confirmed by Steven Trezise (TC):

I received pictures and input from three sources (many thanks to both players and to Lennart Aspelin) and while there were some odd variations between them, the important features, such as the move Bendi was intending to play, are shown on everyone's pictures and the move Bendi was about to play is is already confirmed in his picture above.

Bendi then plays his tile 1 into his forced space and it is Niklas' turn. He needs to play five of his tiles in succession without choice (#4, #1, #5, #2 and #3 is the order) and is left with his bottom tile only. The score at this point is 26-18 to Bendi.

By playing his one remaining tile to the rightmost end of the Tantrix with the blue bend pointing down (not to the right), Niklas can add three to his line, since Bendi has both BYB and YYB tiles. Note, however, that the facts that (1) Bendi has two BYBs AND (2) all the follow-up forced spaces include at least one green colour fragment imply that he is not forced to throw the only tile with red on it away which he can then add to the left-hand end of his line, which IS possible if you look carefully enough. Had Niklas chosen to try to block Bendi instead of building his own line, the margin would have been two points worse for him at 18-26.

I believe that the perfect play from both players would have led to the game flow described above hence to a result of Bendi winning 27-21.