IAGO-XClass-NMS.zrf provides to X-Class forms of IAGO Chess.  Near Chess is by Rich Hutnik and is a streamlined version of Skirmish Chess by Tony Paletta.  Mini-Grand (also by Rich Hutnik) is an attempt to adapt Christian Freeling's Grand Chess to an 8x8 board by means of IAGO Chess rules.

Skirmish Chess, by Tony Paletta, has been modified here to fit the IAGO Chess pawn promotion rules).

These games are hybrid designs, based on the framework of IAGO Chess, but Pawns also only move one space forwards at start (the pawn still captures as normal).  In Near Chess and  Mini-Grand, the king is not allowed to castle. In Skirmish, the king is allowed to castle. The Near Chess also differs from Mini-Grand and Skirmish in that the objective is to capture the enemy King, instead of checkmating it.  In all versions, pieces are only allowed to promote to friendly pieces that have been captured, or are in reserve.

Also included in this package is IAGO-XClass-NMS-quickstart.zrf which contains multiple variants where players drop all their reserve pieces on the board before they start, instead of holding onto them.  In this file is also Near, Mini-Grand and Skirmish Chess (modified to fit B-Class IAGO Chess pawn promotion rules) to familiarize players with the basic rules, and don't provide players any reserve pieces.  These games do stand on their own right as unique games worth playing.

See the included read-me for the rules for B, C, M and V-Class games.