Kacper Piorun

💫 Double Grandmaster in otb chess and chess solving,
🧩 6 times World Chess Solving Champion
♟️ 2 times Polish Chess Champion
♟️One Titled Tuesday's win

[Kacper Piorun @gmsolver]

@Radoom Yes, it was

[Kacper Piorun @gmsolver]

In my collection of puzzles of the week it deserves the spot! White to play! ( Puzzle of the week #42/2026)

[Arturs Neiksans @GMNeiksans]

Why Black's ...Nxf4 was a mistake?

[Kacper Piorun @gmsolver]

Solution: It works so fluently on the phone

[Kacper Piorun @gmsolver]

Puzzle of the week #41/2026: @Wfcc_Chess updated the layout of their website, which looks much better.
They also offer daily puzzles. So here is one from today. White to play and mate in 2 moves, gl!

[Kacper Piorun @gmsolver]

@Wfcc_Chess https://t.co/cQxb4YpCYK link to the website

[Kacper Piorun @gmsolver]

Puzzle of the week #41/2026: @Wfcc_Chess updated the layout of their website, which looks much better.
They also offer daily puzzles. So here is one from today. White to play and mate in 2 moves, gl!

[Kacper Piorun @gmsolver]

where 3....0-0 4.Rg1# seals the deal

[Kacper Piorun @gmsolver]

Solution: the longest move 1.Bh1!

[Kacper Piorun @gmsolver]

(Puzzle of the week #40/2026) : We stay with castling theme. White to mate in 4 moves, good luck!

[Kacper Piorun @gmsolver]

and after 1.....Na7 2.Qc6 dxc6 the key move for White is to castle! 3.0-0-0!

[Kacper Piorun @gmsolver]

When you hit a chess number at 5 minutes Puzzle Rush

[Kacper Piorun @gmsolver]

@ghost_of_sasha You forgot that Black can castle

[Kacper Piorun @gmsolver]

(Puzzle of the week #40/2026) : We stay with castling theme. White to mate in 4 moves, good luck!

[Kacper Piorun @gmsolver]

Solution: Because Black can castle, bK and Rh8 couldnt move. So the last move had to be g7-g5. So the solution is 1.hxg6 e.p.

(P.S.) If Black couldnt castle then 1.Ke6 is the way

[Kacper Piorun @gmsolver]

Correction, I think it's important: Black can castle

[Kacper Piorun @gmsolver]

@canis_nihili Yh, i was trying to check it, appearantly it's not obvious how to treat it

[Kacper Piorun @gmsolver]

Correction, I think it's important: Black can castle

[Kacper Piorun @gmsolver]

Puzzle of the week (#39/2026): Simple mate in 2 moves , good luck! (found in Warsaw)

[Kacper Piorun @gmsolver]

Puzzle of the week (#39/2026): Simple mate in 2 moves , good luck! (found in Warsaw)

[Kacper Piorun @gmsolver]

Solution: both queens using two portal square

[Kacper Piorun @gmsolver]

Puzzle of the week (#38/2026): from Hopper Magazine. Reach this position after both sides make 8 moves, good luck!

[Kacper Piorun @gmsolver]

@BuendiaChess oh yeah, looks like I've jinxed Jorden 🥶🥶

[Kacper Piorun @gmsolver]

Best game of the Olympiad? #chess