puzzle 2.1

Hello guys . sorry for the delay in posting this puzzle . In all honesty i forgot i made this puzzle series . don't worry i will post more often like i used too . and i know some of you will say that the Fisherman's puzzle was puzzle 2.1 so why is this not 2.2 . Well , i have decided that the story puzzle's will be another series . so here is today's puzzle . answer will be revealed tomorrow.

I will post the second story puzzle today a few hours after this post . For now good luck solving this one

are we playing white or black?

sorry forgot to mention 
White to play and win

ok

i think Bishop to b2 and will win the game afterwards by promoting

Bb2+, because if takes or goes on the same file, you promote with check and if Kd2, then you can chase the king down with the knight

hmm your half correct but your also half wrong . The major threat is the promotion so we have to keep an eye on that . perhaps it would be better if I reveal the answer's . I think you guys had enough time on this

Done

Bb2

what’s the answer

hmm . i have already shown the answer . but in a diffrent forum