Is ChessGrind free to use?

Yes, ChessGrind is completely free. All puzzles, openings, traps, and AI play are available at no cost.

How do chess puzzles work on ChessGrind?

ChessGrind offers 50+ tactical puzzles across categories like forks, pins, skewers, and checkmates. Each puzzle rewards XP, with bonus multipliers for combos and perfect solves.

Can I learn chess openings on ChessGrind?

Yes, ChessGrind features 30+ openings with interactive animated boards showing each move, including the Sicilian Defense, Queen's Gambit, Italian Game, and more.

What skill level is ChessGrind for?

ChessGrind is designed for all skill levels — from complete beginners to advanced players. The AI adjusts from beginner to grandmaster difficulty, and content is organized by complexity.

intermediateBlackmar-Diemer Gambit♔ White to play+35 XP

Halosar Trap

A brilliant queen sacrifice leading to checkmate with a knight fork.

Move Sequence

1.d4d52.e4dxe43.Nc3Nf64.f3exf35.Qxf3Qxd46.Be3Qb47.O-O-OBg48.Nb5Bxf39.Nxc7#

Step-by-Step Explanation

White gambits multiple pawns for rapid development

When Black grabs the queen on f3, it removes a defender

Nb5 threatens Nxc7+ and the queen simultaneously

Nxc7# is checkmate — the knight, rook, and bishop control all escape squares

Move Annotations

1. d4Gambit opening

d5Accepts

2. e4Gambit continues

dxe4Develops

3. Nc3Recaptures

Nf6Takes pawn

4. f3Attacks queen

exf3Takes pawn — greedy!

5. Qxf3Queen retreats

Qxd4Develops with attack

6. Be3Castles queenside — powerful

Qb4Pins the queen? Not quite...

7. O-O-OAttacks c7 and queen!

Bg4Takes the queen!

8. Nb5Takes the queen — but...

Bxf3Checkmate!

Practice the Halosar Trap interactively

Play through the trap move-by-move on an animated board

Open in ChessGrind →

Halosar Trap

Move Sequence

Step-by-Step Explanation

Move Annotations

Practice the Halosar Trap interactively

More Chess Traps

Legal's Trap

Stafford Gambit

Fried Liver Attack

Elephant Trap