Rook tier · Sharp Najdorf · plays the London System
Marek grew up on the Najdorf, and at 34 he still thinks like a Sicilian player even when the board tells him otherwise. Facing the London as Black, he picks the most confrontational answer available: an early ...c5, the queen jumping to b6, and a willingness to gain queenside space with ...c4 rather than wait. He wants imbalances, a pawn structure that is no longer symmetrical, and a reason to calculate.
What bothers him is a game where nothing happens. If White keeps the position compact, avoids weaknesses and refuses to open lines on the queenside, Marek tends to look for activity a move too early, and that urge can loosen his own centre. He is happiest when the queens stay on and the pawn tension is high. Give him a slow middlegame where his dynamic pieces have no targets, and you are playing on your terms rather than his.
At 2058 ELO, Marek rarely gives material away for nothing. He is held to that rating by the engine, so you will see the occasional inaccuracy in quiet positions, but tactics are usually spotted. Games are won by building a better position over many moves and converting it carefully.
Against the London System (1.d4, Nf3 and an early Bf4) Marek answers with ...d5 and ...Nf6, then hits the centre with ...c5. The plan is the most direct one Black has: pressure d4, bring the queen to b6 to eye b2, and push ...c4 to gain space on the queenside once White's queen has gone to b3.
1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.c3 Qb6 6.Qb3 c4
Learn it move by move: London System walkthrough
Beating Marek trains restraint: keeping a sharp opponent short of targets until your central break is ready. It also teaches when a pawn break is worth more than a direct attack.