4 moves (8 plies) deep opening-lines. 

Filtered out of BigDatabase 2018 (both players 2400 Elo or better (both players 2600 Elo 
or better for the small SuperGM-file))
No double endpositions = all endpositions are unique
Some strange lines with strange moves in ply 1 and 2 were 
deleted (1.a4 or 1...h5 for example)

All endpositions checked with Komodo 11.2.2 (45''/move, Quadcore, 2GB Hash)
eval-interval [-0.40;+0.60] allowed - all other lines were sorted out


SuperGM_4mvs-files: 2668 different lines/endpositions

IM_4mvs-files: 11172 different lines/endpositions
(in the pgn/epd-files the SuperGM-lines are followed by the IM-lines)

Enjoy!

(C) Stefan Pohl, 2019

