Full-fledged Pawn Status for Custom Pawns

[rapiermother]

Using pawnTypes, we can add new pieces which behave like pawns in almost evey way; as of now, the pawnTypes PieceSet allows pawn-style promotion, en passant capturing, and n-move rule considerations for such pieces.

In order to grant custom pieces "full-fledged" pawn powers however, they'll need to be able to double-step/triple-step. My hope is that either pawnTypes can be updated such that all members of its PieceSet can do so, or that a doubleStepTypes option can be added to facilitate this.

[ianfab]

Did you check the "initial moves" in the Betza notation like this:

Fairy-Stockfish/src/variants.ini

Lines 299 to 304 in 8549ed1

	# pawns with extra sideways and backwards movement
	# example for defining a custom pawn type
	# resetting the original "p" piece with "pawn = -" is optional as already done implicitly
	[allwayspawns:chess]
	customPiece1 = p:mWfceFifmnD
	pawnTypes = p

With this you can't get two independent regions like for double- and triple-steps but only of them, but having both should be a very special case anyway, so I think that is acceptable to be restricted to standard pawns.

[rapiermother]

I can confirm that adding the 'ifmnD' to the Betza of my custom pawn types did the charm as you've suggested. Thanks very much!

[rapiermother]

See @ianfab's comment on the OP for the direct solution.