Rook tier · Knight Rider · plays the London System
Felix is a knight player. At 58 he still enjoys manoeuvring his knights to outposts and watching them dominate a position that an engine would call equal. Against the London, his book line ...d5, ...Nf6, ...c5 and ...c4 creates the kind of locked queenside structure where knights can find good squares on d3, b4 or e4.
He likes positions with fixed pawn chains and clear outposts, and he tends to look for ways to trade his bishops for White's knights when the structure allows. Open positions with long diagonals are less pleasant for him, because his knights lose their footing. He also tends to plan slowly, preparing a manoeuvre several moves in advance. That patience makes him dangerous in closed games but gives White time to change the structure. If you can open lines before his knights arrive, his plans lose much of their force.
At 2122 ELO, Felix plays at master strength. Outright blunders are rare, so you need a sound opening, a clear plan and accurate calculation in sharp moments. A draw against him is a good result; a win means you played a very good game.
Against the London System (1.d4, Nf3 and an early Bf4) Felix 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
Felix's games teach the battle for outposts: how to deny squares to knights and when to open the position so bishops become stronger.