[what is this?]

[what is this?]

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Desperado 3 games, 1955-2007 Discovered Attack A discovered attack occurs when one of your pieces moves out of the way of a Queen, Bishop or Rook to reveal an attack on one of your opponent's pieces or a critical square. When the piece moved checks the opponent's King, while your Queen, Bishop or Rook attack another piece or critical square, it is known as a "discovered attack with check." The closely related "discovered check" is a kind (i.e. subcategory) of discovered attack, except your piece that has been "discovered" (Queen, Rook or Bishop) is checking your opponent's king (as opposed to another piece in discovered attack). Games featuring discovered check combinations are in a separate collection. 139 games, 1834-2016 Discovered Attack with Check 12 games, 1905-2017 Discovered Check Discovered check is actually a subcategory of the "Discovered Attack," but with one important difference. In Discovered Check, a forced advantage is gained (material or positional) when a piece moves and allows another piece of its same color to give check. 108 games, 1849-2017 Double Attack Double attack is the simultaneous attack by a single piece on two hostile pieces. I have not included Knight Forks in this collection, even though they are a subcategory of double attacks, because of their uniqueness -- but have included them in a separate collection. 267 games, 1841-2015 Double Attack (Pawn Fork) 3 games, 1983-2017 Double Attack (two separate Pieces attacking) 5 games, 1925-2015 Double Attack win a piece or get a mating attack 5 games, 1974-2011 End game tactics 169 games, 1870-2010 Endgames (Rook and Pawn Endgames) 3 games, 1941-2009 Exploiting Weak Squares 1 game, 1949 Forcing Weak Pawns 16 games, 1919-2009 Get Out of That (GOOT) as coined by 1 game, 2005 Helpless King 139 games, 1789-2011 In-Between Move (Zwischenzug) White misses 30. Rd7+! ± 42 games, 1834-2016 Interference or Obstruction Obstruction or interference involves breaking communications between pieces on a file or diagonal or Blocking a square, often with the sacrifice of a pawn or piece. In one sense, it is like throwing a wrench into the machinery of your opponent's position. It can be used to remove the protection for a piece, or it can be used to Block escape squares for a trapped King or piece. In another sense, it is the opposite of a clearance move. See http://www.bu.edu/dbin/law/chess/in... and http://en.wikipedia.org/wiki/Interf... for a discussion of the interference tactic. For now I'm using the term obstruction to refer to the same tactical theme. 54 games, 1886-2017 Isolated Pawn 18 games, 1966-2009 King and pawn endgames 1 game, 1978 Knight Forks The Knight Fork is a type of "double attack." I have chosen to make it a separate category of tactics because of the uniqueness of the Knight move and the Knight Fork. Knight Forks often involve the sacrifice or pseudo-sacrifice of the Queen or Rook to obtain a material and/or positional advantage. 172 games, 1809-2017 Mate (Boden's Mate) 9 games, 1853-1961

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