The Super Solid Slav Defence Erzählungen und Romane the Jänisch Gambit and the

the Jänisch Gambit and the Evans Gambit

which increase in difficulty

International Master John Bartholomew

which was never extremely popular but is still played today

followed up by

The Super Solid Slav Defence Erzählungen und Romane the Jänisch Gambit and theAdding the Slav to your repertoire will give you an opening with a solid foundation. However, that doesn't mean you'll get a boring game. On the contrary, this opening often leads to very dynamic play. Therefore, it should come as no surprise that many of today's world class players, including Carlsen, Caruana and Firouzja, have frequently played this opening and used it to play for victory against their contemporaries.