[Event "Vienna"] [Site "?"] [Round "0"] [White "Tarrasch"] [Black "Marco"] [Result "1-0"] [FEN "1rq2rk1/p1nbbpp1/3p1n1p/1ppP1P2/2P2B2/1PNB1N1P/P1Q3P1/R4RK1 b - - 0 1"] [ECO "A00"] [Opening "Polish (Sokolsky; Orang-Utan)"] {The technique of siege warfare We observe here, not only that the d-pawn cramps the Black game, but also that the pressure is intensified by the f-pawn - so that all chance of counterplay by Black is ruled out. Only on the Queenside has he some chance of increasing the space available to him. Dr Tarrasch felt especially at home in such positions and he demonstrates the superiority of White's position with impeccable technique} 1... b4 2. Ne2 a5 3. g4 Nh7 4. h4 {The purpose of this move is not so much to play Pg5 as to prevent Black's pieces from using g5, and thus achieving some slight freedom} 4... Qd8 5. Bg3 a4 6. Kh1 Ra8 7. Rae1 {Typical siege technique; White is not going to allow an exchange of Rooks. We know already that every exchange helsp the side with less maneuvering space. In this case we have clear evidence of this fact, since Black's pieces are cramped and uncoordinated} 7... Ne8 8. Nf4 Bf6 9. Ne6 {The decisive blow. If the Knight is captured, the f-pawn recaptures and the Knight on h7 as well as the Bishop on d7 are attacked} 9... axb3 10. axb3 Qb6 11. Nxf8 Kxf8 12. g5 { Now white blasts open lines to destroy Black's hapless defence} 12... hxg5 13. hxg5 Nxg5 14. Qh2 Kg8 15. Nxg5 Bxg5 16. f6 $1 g6 17. Bxg6 1-0