is it possible to win this?

I stalemated this endgame but after game analysis also doesnt show a clear path to victory. it just goes on and on and on..

Is this endgame theoratically a draw already?

From which move you think it is a draw?

from the queen promotion. I know i made mistakes beforehand, it might have ended very differently but i'm curious about this endgame position. After the promotion.

@KMMCS88 hmm.. so i should have checked and kept checking until i forked that pawn and king. And check position is very unique.. King is in like zugzwang. Very hard to calculate it. Is there a name of this technique? you used engine to find it?

49. Ka3 thats a dream move. He played a3 and pushed the pawn and got himself stucked deliberately.

If he had played 49. Ka3 I directly would have played Qa1 and ended all draw possibilities.

Just get the Queen closer until you force the King in front of the Pawn. If it goes behind the Pawn, get your Queen in front of it. Checks are useful to get your Queen closer without letting Black do what he wants. I used the engine to find Qf4, but the general strategy would've worked immediately after the promotion.

@ShadowCellen but it was not my turn at that current position  But that gave me an idea.  Very simple one. I should have stayed on that diagonal.

Simple as that, wow.. i'll remember that next time. Thanks to all who tried and helped 

I am tired to figure the fastest move. Just make a move that leads to the wanted position 

Hi.

50. Qb8 is a mistake (it does not throw away the win, but it requires spotting 50... Ka1 51. Qf4!, which is not easy).

With the a-pawn on its sixth rank, you need to get your queen closer, delivering checks. Allowing your opponent to advance it to its seventh rank with a2, is simply wrong (unless your king is already close enough to help deliver a checkmate).

Ok, you approach the black king and pawn with your queen, delivering check, ¡not allowing him to advance the pawn! Once your queen is on b4, he needs to put his king on a2, preventing his own pawn from advancing. He has to play ... Ka1. You then move your king, and in the next move capture the pawn with your queen: Qb4xa3

Oh, I just now see that simply 50. Qc3 wins the pawn immediately, as you pointed out. But the method I mentioned works in positions with the enemy rook pawn on the sixth rank, and 50. Qc3 is "accidental".

I can recommend "Chess endings: essential knowledge", by Averbakh, it is an endgame book for beginners. I think it is the best one to explain these simple positions.

Greetings.

You just need to know that particular position is drawn.  Then, don't let it happen - make sure you give checks so that the king can't defend the pawn.  Setting up a fork isn't necessary.

A Queen vs a 7th rank pawn is a draw (because that is a rook pawn)

If its not a rook or bishop pawn you can win

Since it didnt reached the 7th rank yet, you can win