Pawn tier · Methodical Engineer · plays the Queen's Gambit Declined
Theo works as an engineer and plays chess like a project with a specification. The Queen's Gambit Declined suits him perfectly: every piece has a known square, ...e6 holds the centre, the king goes to safety early and the plan with ...b6 and ...Bb7 is written down before the game begins. He takes pride in never being surprised in the opening.
His weakness is that the specification ends. Once the position leaves familiar territory, Theo keeps doing what he did before, improving pieces by small steps even when the position needs a concrete reaction. He is comfortable in slow, structured middlegames and uncomfortable when you change the character of the game, for example by giving up a pawn for the initiative or starting an attack before his setup is complete. At 1100 he still overlooks tactics, often because he is busy following his plan rather than checking yours. Give him problems his routine does not cover.
At 1100 ELO, Theo plays like a real club player at that rating: he sees simple threats but still leaves pieces hanging and misses tactics two or three moves deep. Check every capture he offers, and look for loose pieces after each of his moves. Most games at this level are decided by the first clean tactic, not by the opening.
Theo defends with the Queen's Gambit Declined: 1.d4 d5 2.c4 e6, then ...Nf6, ...Be7 and early castling. The main book line is the Tartakower, with ...h6 and ...b6 so the light-squared bishop can go to b7. It is one of the most respected defences in chess and hard to break by force.
1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Be7 5.Bg5 O-O 6.e3 h6 7.Bh4 b6 8.Bd3 Bb7
Learn it move by move: Queen's Gambit Declined walkthrough
Theo teaches you to disrupt an opponent who plays by routine: change the type of position and make him solve problems his plan does not cover.