Alberto David vs Eduardas Rozentalis (2008)

Alberto David vs Eduardas Rozentalis
International Championship of Paris 2008 · Queen's Gambit Accepted: Central Variation. Alekhine System (D20) · 1-0

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Jul-14-08		notyetagm: <A SQUARE CAN BE A TACTICAL TARGET> From Chess Today 2802; I added the diagrams: < White: David (2562) Black: Rozentalis (2582) Championship of Paris (6), 03.07.2008 The Queen's Gambit Accepted – [D20] click for larger view 20...Nd3? A blunder in an objectively lost position. click for larger view 21.Re4! 1–0. Black resigned as he was losing a piece.> 21 e1-e4! is a <DOUBLE ATTACK>, a <FORK> from the White e4-rook. The White e4-rook <FORKS> the <UNDEFENDED> Black g4-bishop and the d4-forking square, from which the White e4-rook will <FORK> the Black d6-king and the <UNDEFENDED> Black d3-knight. So 20 ... e5-d3? is a -BLUNDER- because it <LINES UP> the Black d6-king and the <UNDEFENDED> Black d3-knight, turning the d4-square into a <TACTICAL BASE>. Remember, <A.C.T.S = ALIGNMENTS CREATES THREATENED SQUARES>. Here the alignment Black d6-king + <UNDEFENDED> Black d3-knight turns the d4-square into a <TACTICAL BASE>, a <FORKING SQUARE>. Hence 21 e1-e4! is a <DOUBLE ATTACK>, the e4-square being the <TACTICAL BASE>, the <UNDEFENDED> Black g4-bishop being one <TACTICAL TARGET>, and the d4-forking square being the second <TACTICAL TARGET>.

Jul-14-08		notyetagm: Position after 21 e1-e4! 1-0 click for larger view Here the White e4-rook <FORKS> the <UNDEFENDED> Black g4-bishop and the d4-forking square, exploiting the <ALIGNMENT> of the Black d6-king and the <UNDEFENDED> Black d3-knight along the d-file. Notice the similarity to the following <QUEEN FORK> from a variation of Capablanca vs Euwe, 1931. (VAR) Position after 26 b7xd7+ f5xd7 27 a2-a3! click for larger view Golombek points out this instant win that Capablanca missed, this <QUEEN FORK> of the <UNDEFENDED> Black c3-bishop and e7-forking square, exploiting the <ALIGNMENT> of the Black g7-king and <UNDEFENDED> Black d7-bishop along the 7th rank. So David's 21 e1-e4! <FORKS> the <UNDEFENDED> Black g4-bishop and the d4-forking square, while Capablanca missed the idea of 27 a2-a3!, <FORKING> the <UNDEFENDED> Black c3-bishop and the e7-forking square. 21 e1-e4! and 27 a2-a3! are <DOUBLE ATTACKS> in which one of the <TACTICAL TARGETS> is a <SQUARE>, in both cases a <FORKING SQUARE> (d4 and e7, respectively).

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21 Re1-e4! forks undefended Black g4-bishop,d4-forking square
from Double attacks by notyetagm

This game is annotated in Chess Today #2802
from Chess Today: an excellent chess resource by notyetagm

20 ... Ne5-d3? alignment with d6-king makes d4 a forking square
from ACTS: Alignments Create Threatened Squares by notyetagm

21 Re1-e4! forks d4-forking square, undefended Black g4-bishop
from Forking a forking square by notyetagm

21 Re1-e4! undefended Black g4-bishop drops off to rook fork
from Loose Pieces Drop Off (LPDO)! by notyetagm

21 Re1-e4! d4-forking square is a tactical target for e4-rook
from Square is a tactical target by notyetagm

21 Re1-e4! undefended Black d3-knight drops off to a rook fork
from Loose Pieces Drop Off (LPDO)! , part II by notyetagm