http://en.lichess.org/7XkpHeeB#49 27 moves, but it could have been 17. I also tried for the schollars mate.
8 moves :
http://fr.lichess.org/DCvzhn1MThis level 1 is really stupid ;-)
http://en.lichess.org/L2P3K0Rlbrnh7 again, but with higher value (lost one pawn the first time, nothing this time)
Doesn't seem the computer will ever capture with its king unless it has to.
http://ru.lichess.org/arfAzPZzthe more stupid moves you make, the faster you win.