This puzzle is a classic! 

I was not even near a solution. Amazing puzzle...

Brilliant. I spotted the first move, but the full analysis was beyond me.

Excellent puzzle... you are just brilliant

One of the better puzzles

I have seen this puzzle before. I didn't remember the whole position, but the motive and the queen sacrifice in the first move. And from then I could calculate the rest, but I agree, in a real game very hard to spot such a first move. Though I wouldn't consider it impossible, that a GM could find it in a classical game, if he is not in time trouble, because he can calculate, that all king moves lead to a draw, and due to the checkmate pattern with the pawns - what is not too difficult to spot, even most probable in the game it would be already in the radar - even this queen sacrifice could come to the mind, to avoid queen checks and get the necessary one tempo to threaten with this checkmate and the rest calculation is not so difficult.

I figured out the solution from the thumbnail within 20 seconds. I could see that black was close to being checkmated and that the mating net has time to unfold once the black queen is drawn to g5 when it cannot check white's king once it moves to a6.

If it wasn't a puzzle i wouldn't have found it, but i immediately saw it coming on this one.

The Mitrofanov study is quite famous. In the study the white rook sacrifice on e1, so due the knight on e1 Black only can give check with the promoted black queen on h5. This study also is called "Qg5 - study". The original Mitrofanov -study with the black knight on f3 is cooked. But the version with black knight on g2 is correct.

Its one of those puzzles where the solution isnt too hard to gind because you know the answer has to be the crazy option. But i would NEVER find it in a game

I solved it fully. I saw Ka6 was threatening checkmate but black could chase me out with Qe2. The sacrifice seemed obvious at that point, to get the Black Queen off the diagonal. The only way to stop checkmate was black Ba7, but then white pushes Pc7 threatening both a checkmate and a promotion. Black can't stop both.

I honestly thought, given the other puzzles you've shown, that the queen was going to sacrifice, but had no idea how that would help. This was very instructive on how to limit moves and gain tempo by giving away a piece.

A charming classic. Bet Tal would’ve spotted this Queen sacrifice.

Very very brilliant

This puzzle is really amazing

I found the Queen sacrifice. I wasn’t quite sure how to end it though after bishop takes.

Having seen this great puzzle before, I must recuse myself from offering the solution.

That is a great puzzle

It's called Mitrafanov's Deflection, and if I hadn't seen it before I'd never think to do the move that wins. Not in a million years, because until the point is explained to you, it looks totally bonkers. XD

Really amazing!!

amazing tricky one this is so creative

I think at the position of 7:20 the bishop can go to the B8. Then white can promote the pawn at C8 or take the bishop and promote. In the first case there will not be a check and black queen can go to D5 covering the B7 field. It could be a draw for white. The second case is loosing for white.

Yep, great puzzle!

Love it!

1) Qg5 (get Black Queen off white squares) ... QxQ, 2) Ka6 (no safe check for Black) ...

Didnt get to the solution. Wow!

I saw Qg5 and also, after Bxa7, c7 but I was not able to analyze everything till final solution. Let's say more or less solved😏

Great 👍

What about if black queen goes to D5?

8:26 i immediately have seen the point, but this is a draw.if the black takes on a7 it's not clear whether the white can win. The rook against the knight is usually a draw

Difficult