It has to be Kg6, right?
So basically black'd be left with two options, if ..g1-Qg1+, then Bg5+ is discovered mate (Same rule is applicable to 'rook' or 'bishop' promotion).
If g1-Ng1, then Bf4 is mate.
Thanks for posting this puzzle, have a good day!
VERY challenging Mate (in 2?)... Try your best!!!
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Mar 16, 2025
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#2
Mar 16, 2025
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#3
You are correct all the way! Nicely done!
I scratched my head over this and Kg6 was not even a choice I thought of! Super!
What totally blows me away is that I tried several bots and AIs also on this and NONE of them saw Kg6 as even an option! 
It is a mate whether the pawn promotes OR if the black K goes Kh1 or Kg1 as well... The Bishop goes either to block check (Bg5) if pawn promoted (g1=Q+), or if K moves, Be3 Mates! NICE...
Excellent solving!
Mar 16, 2025
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#4
When there are limited pieces over the board, it kind of becomes easier to explore the options!
Thank you for posting this, sensei!
Mar 16, 2025
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#5
And you're also correct - if g1=N, then Bf4 mates!
Amazing. Very unique puzzle methinks. again, exceptional solving.
Rm
Great puzzle and great solution!
Rookium wrote:
What totally blows me away is that I tried several bots and AIs also on this and NONE of them saw Kg6 as even an option!
What do you mean by " bots and AIs"? Any chess engine solves this in 0.1 second.
Mar 16, 2025
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#12
magipi wrote:
Rookium wrote:
What totally blows me away is that I tried several bots and AIs also on this and NONE of them saw Kg6 as even an option!
What do you mean by " bots and AIs"? Any chess engine solves this in 0.1 second.
yeahh unless he used chatgpt 
Mar 16, 2025
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#13
Depends upon the engine I think - Chess Lv100 DOES NOT find that solution, looks for an alternate - I tried a couple of (non-Chess.com) bots and nada also. 
Unless a way to TELL the bot to mate in 2 it just defaults to the more obvious move choices, Which are Mate in 3 or 4 moves.
But good solving, gang, and a nifty puzzle regardless, IMO. Easier for some, I guess, if doing them all the time.
Rm
Mar 16, 2025
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#14
BTW I DO see that if one runs this site's analysis it is found pretty fast. Hmmm.
why did u block me for no reason @Rookium? sorry no hate, but idk why??? tell me if you have some inquiries, i'm really really sorry if i did something bad to you, please forgive me.
Well here is an interesting and very challenging puzzle/mate-in-2:
I have tried this to NO avail, even my AIs playing me or each other can only do Mate-in-4 usually!
Worth a try! So far I have not solved this one! See if Mate-in-2 even possible! I am skeptical, unless the King HAPPENS to move a certain way. It does not appear to be a universal M-I-2; That is all the hinting I am giving.
Good hunting! WHITE to move BTW...
Rm