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VISUALIZE THE DISCOVERY ++ !
Compiled by notyetagm
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DOUBLE ATTACKS (FORKS, DISCOVERIES, CLEARANCE) create -additional- control of squares, Na++ and Nd++.

A player actually has -additional- control of squares (that is, more than first meets the eye on the chessboard), Na++ and Nd++, if he has a potential <DOUBLE ATTACK (FORKS, DISCOVERIES, CLEARANCE)>. The "++" comes from the <TEMPO> derived from the particular type of <DOUBLE ATTACK>. For the <FORK>, the "++" comes from the existing <TACTICAL TARGET>. For a <DISCOVERED ATTACK>, the "++" comes from either <TL> or <TM>.

40 Ba4-d7!! White g4-queen controls d7-square thru the e6-rook
Fischer vs R Shocron, 1959 
(C97) Ruy Lopez, Closed, Chigorin, 40 moves, 1-0

33 ... Be6-a2! Topa visualizes Black b4-pawn on b3, tempo TL=Q
Karjakin vs Topalov, 2002 
(B30) Sicilian, 33 moves, 0-1

11 Ne5-f7!! Aronian visualizes White d5-pawn on e6, tempo TL=B
Aronian vs Navara, 2006 
(E17) Queen's Indian, 25 moves, 1-0

25 Rg3-g7!! White sees d4-knight already on f5-sq from tempo
J Werle vs P K Wells, 2008 
(D39) Queen's Gambit Declined, Ragozin, Vienna Variation, 27 moves, 1-0

20 Rh6xNf6! Pono visualizes White c3-knight on d5, tempo TL=Q
Ponomariov vs E El Gindy, 2007 
(B61) Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2, 60 moves, 1-0

17 Nd3-c5! Motylev visualizes White d2-pawn on d4, tempo TL=Q
Motylev vs Carlsen, 2007 
(C48) Four Knights, 44 moves, 1/2-1/2

6 games

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