Stockfish17.1 in puzzle rush

[Uri Blass]

[Dann Corbit]

Stockfish is not a great puzzle solver.
What is the difference between "Stockfish assisted" and "Stockfish solved them"?

[Uri Blass]

Stockfish is not a great puzzle solver.
What is the difference between "Stockfish assisted" and "Stockfish solved them"?

I believe Stockfish assisted means some software to use stockfish.

I am not sure how it used it exactly and maybe it used multi-pv with 2 options and decided to play a move as soon as it saw a mate or a big difference between the best 2 moves(there were some problems when stockfish relatively used more time)

[Uri Blass]

from the comments in the link:

Explainations for the failed positions.

Failed position 1: Be5 is fairly easy for a human to find. However Stockfish played Bxg7+ which is also a good move. Stockfish 17.1 finds Be5 on my Computer in less than 2 seconds, and after less than 4 seconds we have four winning moves for white Be5, a4, Bxg7+, c4. This means the puzzle contains multiple solutions and is thus invalid.

Position 2: the correct move is Kh2. Stockfish doesn't seem to find it however Stockfish 17.1 gave Kh2 after less then a second on my computer and took 5 seconds to determine a +3 advantage so I don't know what happened.

Position 3: This is tragically a case of the classical repetition evaluation error. Basically Stockfish intended to repeat the position and then play the correct Ng5. It sometimes happens that Stockfish evaluates a move higher even though the best continuation is to repeat the position and then play the second line of the engine.

[Vinvin]

Please more videos like this !

[Paloma]

Where can I see these positions?
It's much too fast!

[Uri Blass]

The positions are always with the opponent to move when the opponent makes a move(often a mistake) and stockfish replies
first puzzles are very easy also for humans but the level becomes harder when you solve more puzzles:

The first games:
puzzle 1:

[pgn][Event "Computer chess game"]
[Site "DESKTOP-7QE6S12"]
[Date "2025.10.26"]
[Round "?"]
[White "human"]
[Black "stockfish"]
[Result "0-1"]
[BlackElo "2400"]
[Time "01:45:09"]
[WhiteElo "2400"]
[TimeControl "300+3"]
[SetUp "1"]
[FEN "1r4k1/p1p2pp1/2pp2rp/4p1q1/2P1P3/P1PP1P1P/4QP2/1R3R1K w - - 1 1"]
[Termination "normal"]
[PlyCount "6"]
[WhiteType "human"]
[BlackType "human"]

1. Rxb8+ Kh7 2. Rh8+ Kxh8 3. Rg1 Qxg1# 0-1
[/pgn]

puzzle 2:

[pgn][Event "Computer chess game"]
[Site "DESKTOP-7QE6S12"]
[Date "2025.10.26"]
[Round "?"]
[White "human"]
[Black "stockfish"]
[Result "0-1"]
[BlackElo "2400"]
[Time "01:50:56"]
[WhiteElo "2400"]
[TimeControl "300+3"]
[SetUp "1"]
[FEN "2kr4/ppp2ppp/7n/4R1N1/2P5/N7/PP3PPP/R2r2K1 w - - 0 1"]
[Termination "normal"]
[PlyCount "4"]
[WhiteType "human"]
[BlackType "human"]

1. Rxd1 Rxd1+ 2. Re1 Rxe1# 0-1
[/pgn]

puzzle 3:
[pgn][Event "Computer chess game"]
[Site "DESKTOP-7QE6S12"]
[Date "2025.10.26"]
[Round "?"]
[White "human"]
[Black "stockfish"]
[Result "0-1"]
[BlackElo "2400"]
[Time "01:55:12"]
[WhiteElo "2400"]
[TimeControl "300+3"]
[SetUp "1"]
[FEN "6r1/6rk/8/8/8/8/5R1P/4R2K w - - 0 1"]
[Termination "normal"]
[PlyCount "2"]
[WhiteType "human"]
[BlackType "human"]

1. Re3 Rg1# 0-1
[/pgn]

puzzle 4:
[pgn][Event "Computer chess game"]
[Site "DESKTOP-7QE6S12"]
[Date "2025.10.26"]
[Round "?"]
[White "Stockfish"]
[Black "human"]
[Result "1-0"]
[BlackElo "2400"]
[Time "01:57:58"]
[WhiteElo "2400"]
[TimeControl "300+3"]
[SetUp "1"]
[FEN "4r2k/1R5p/2p2Np1/3p4/3P4/4pPPB/r1n1P2P/5K2 b - - 2 1"]
[Termination "normal"]
[PlyCount "2"]
[WhiteType "human"]
[BlackType "human"]

1. ... Rf8 2. Rxh7# 1-0
[/pgn]