What’s wrong with Stockfish?!?!

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WhatTheChess96

Stockfish sees the completely winning position (for white) below, and COUNTS IT as a DRAW?!?!

By the way, in case you were wondering, this is a forced mate in 20 (for white). Only after going through around 5 moves and rewinding to the start does Stockfish go “Ah, yep. This is totally winning for white. I totally spotted that the first time.”
 
Here’s your challenge: Find what Stockfish originally missed: the forced mate in 20.
bald55

I think stockfish is slightly fixed now, it shows +M20 after pressing the forward or backward button

Hripfria202

This is very famous position, known as Queen's dance position. I have watched it many times on YouTube, where white Queens are dancing around black king, forcing the black rooks to cover the checks, until the black pawn goes to e4, and then white delivers checkmate to the black king by moving their queen to f7. Very famous checkmate, but unfortunately, or luckily, it is impossible to meet in a real game. I hope, I explained it understandable, and without any error in chessboard coordination

Chess16723
#2 that does not mean Stockfish is fixed, it is just that Stockfish can now see the mate since the combination has been started.
MARattigan

He didn't say #2 he said #20.

Martin_Stahl
MARattigan wrote:

He didn't say #2 he said #20.

#2 refers to poster #2

MARattigan

Joke.

AmericanFighter07
This is the kind of mate I would find on accident.
InternationaIMaster

Stockfish missed:

Qb7+ Rc6 Qa5+ Rc5 Qb3+ Rc4 Qd2+ Rd4 Qf3+ Re4 Qg5+ e5 Qf7+
Re6 Qd8+ Rd6 Qb7+ Rc6 Qa5+ Rc5 Qb3+ Rc4 Qd2+ Rd4 Qf3+ e4 Qg5+ Re5 Qf7+ Re6 Qd8+ Rd6 Qb7+ Rc6 Qa5+ Rc5 Qb3+ Rc4 Qd2#

InternationaIMaster

I solved it myself because its an easy pattern

Rakshan-Nandakumar

Maybe it is not stockfish or maybe you have to upgrade stockfish

Mazetoskylo

Missed? It shows mate in 20 almost instantly.

Blame it on the crippled web version of Stockfish that's used here, which needs a lot of time to go up to 40-ply.

SacrificeEnPassanter
found it first try e z
The_Blue_J

Easy...

EndgameEnthusiast2357

We have two threads with hundreds of these, "mates that are difficult for engines" and "too difficult for computers". Here's a funny one that stockfish can't see, and it's a simple king walk: