Ponderchess / Special moves
Recognize the pawn capture with a one-move window.
An enemy pawn advances two squares beside yours.
Capture diagonally onto the square it skipped.
Make the capture immediately, or the chance expires.
Play the guided film, or select a scene to pause and study its position.
Rule
En passant in 3D
White's pawn has reached the fifth rank. Only from here can en passant ever happen.
Rebuild the sequence yourself. The board responds to each move, and hints are available.
Click or drag to move · Arrow keys + Enter to play
Your turn · white to play
Select a piece, then its destination. Switch to 2D for a clear overhead view or rotate the 3D board to explore the position.
See the pawn double step, the square it skips, and the one-move window for the capture.
Idea 01
Idea 02
Idea 03
See the pawn double step, the square it skips, and the one-move window for the capture.
Keyboard: Space pauses, the arrow keys step. Gold arrows are White's moves, violet are Black's, red rays are threats, green shows support, blue shows plans.
Make the idea yours
No timer. No score. Just a moment to check your understanding.
