Opening explorer

• 4.e31 line through here1 named line below1 named line below1 named line below1 named line below
• 4.Bf4Queen's Gambit Declined: Harrwitz Attack1 named line below1 named line below1 named line below1 named line below
• 4.Nf37 lines through here7 named lines below7 named lines below7 named lines below7 named lines below
• 4.cxd51 line through here1 named line below1 named line below1 named line below1 named line below
• 4.Bg5Queen's Gambit Declined: Modern Variation54.2%white, 757 games52.8%white, 12,413 games51.1%white, 19,862 games50.4%white, 67,163 games

Moves come from the 3,810 lines we replayed and validated. Win rates exist for the 314 we sync statistics for, so the deeper you go the more often you will see a name without a number.