3D “En Passant”

What is “en passant” (french for ‘In Passing’)?

As is very well illustrated / animated at Wikipedia, It is a special pawn capture that can only happen if the conditions are correct. It is pronounced: en pas·​santThe history of en passant with examples before 15th century & after 15th century, plus how something unfair became fair as it is today. Here’s another good example of en passant. Also ‘According To Hoyle‘ ( [this can be viewed in the book on page 237] – … is a very much a strategic move which forces the other player to make up his or her mind on what to do.):

‘EN PASSANT’ or ‘in passing’ can only be done on the very move following the move that the pawn made by trying to pass the other pawn. In the example below, the black pawn ‘is not permitted escape this attack by use of the double move. – Had it  moved only one square, it would been attacked’. This works for both sides of a pawn.
Rules for en passant capture are:

  1. If a pawn makes a double-jump, it can be captured by an adverse pawn that could have captured it had it advanced only one square.
  2. The en passant capture must be executed immediately or not at all; it may not be made at any later turn.

Below is the example for both 2D and 3D (top board = ‘A’, bottom board = ‘B’):

A Dimensional en-passant

White Pawn: Bh2 - Bh4

White Pawn: Bh2 – Bh4

Black Knight try's to capture Bh4: Ag8 - Ah6

Black Knight try’s to capture Bh4: Ag8 – Ah6

White avoids capture by moving to 5th rank: Bh4 - Bh5

White Pawn avoids capture by moving to 5th rank: Bh4 – Bh5


Black Pawn try's to Pass white's pawn on H5: Ag7 - Ag5

Black’s Pawn try’s to Pass white’s pawn on H5: . Ag7 – Ag5.  Because If Ag7-Ag6 then Bh5 x Ag6

White Pawn: Bh5 x Ag5 (en passent)

Only at this moment: White Pawn: Bh5 x Ag5 . .  (a Dimensional En-Passant).


Going back one move, what if Black try’s to pass on the bottom board level, ‘B’?
This is, as if it were a regular 2D flat game board.

Black Pawn try's to Pass on the bottom board: Ag7 - Bg5.

Black’s Pawn try’s to Pass on the bottom board: Ag7 – Bg5.

White Pawn Bh5 x Bg5 (En passent)

Only at this moment:  White Pawn:  Bh5 x Bg5  (En Passant)

Here is a good visual on YouTube for En Passant.