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  2. Queen's Gambit Declined, Cambridge Springs Defense - Wikipedia

    en.wikipedia.org/wiki/Queen's_Gambit_Declined...

    Nc3 Nf6 4. Bg5 Nbd7 5. Nf3 c6 6. e3 Qa5. Black breaks the pin on the h4–d8 diagonal and forms a pin of their own on the c3-knight (exploiting the absence of the White's queen bishop from the queenside). If Black later plays dxc4, there may be threats against the g5-bishop. Note that 5.cxd5 cannot win a pawn because of the Elephant Trap. The ...

  3. King's Gambit, Rice Gambit - Wikipedia

    en.wikipedia.org/wiki/King's_Gambit,_Rice_Gambit

    Ne5 Nf6 6. Bc4 d5 7. exd5 Bd6 8. 0-0 (instead of the normal 8.d4). White offers the sacrifice of the knight on e5 in order to get his king to safety and prepare a rook to join the attack against Black's underdeveloped position.

  4. Pirc Defence - Wikipedia

    en.wikipedia.org/wiki/Pirc_Defence

    An unusual deviation for Black is 1.e4 d6 2.d4 Nf6 3.Nc3 e6, which can transpose to the Scheveningen Variation of the Sicilian Defence after 4.Nf3 Be7 5.Bb5+ c6 6.Be2 0-0 7.Be3 c5 8.0-0 cxd4 9.Nxd4. An unusual but quite reasonable deviation for White is 1.e4 d6 2.d4 Nf6 3.f3.

  5. Poisoned Pawn Variation - Wikipedia

    en.wikipedia.org/wiki/Poisoned_Pawn_Variation

    The best known of these, called the Poisoned Pawn Variation, is a line of the Sicilian Defense, Najdorf Variation that begins with the moves: . 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. ...

  6. Benoni Defense - Wikipedia

    en.wikipedia.org/wiki/Benoni_Defense

    The Modern Benoni, 1.d4 Nf6 2.c4 c5 3.d5 e6, is the second most common form of Benoni after the Benko Gambit. Black's intention is to play ...exd5 and create a queenside pawn majority , whose advance will be supported by a fianchettoed bishop on g7.

  7. Sixth normal form - Wikipedia

    en.wikipedia.org/wiki/Sixth_normal_form

    The sixth normal form is currently as of 2009 being used in some data warehouses where the benefits outweigh the drawbacks, [9] for example using anchor modeling.Although using 6NF leads to an explosion of tables, modern databases can prune the tables from select queries (using a process called 'table elimination' - so that a query can be solved without even reading some of the tables that the ...

  8. Zukertort Opening - Wikipedia

    en.wikipedia.org/wiki/Zukertort_Opening

    Like White's move, Black's move is non-committal as to opening. 2.d4 is identical to 1.d4 Nf6 2.Nf3 (see Queen's Pawn Game). 2.c4 is a common start for the English Opening or it may be brought back to the Queen's Gambit Declined 2.g3 is a common start for the King's Indian Attack.

  9. Queen's Gambit Declined - Wikipedia

    en.wikipedia.org/wiki/Queen's_Gambit_Declined

    Download QR code; Print/export ... such as 1.d4 Nf6 2.c4 e6 3.Nf3 d5; 1.d4 e6 2.c4 d5; ... usually in the form of gaining a tempo, by capturing on c4 only after White ...