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SELF-BLOCKS are self-captures
Compiled by notyetagm
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Want to trap the enemy king, queen, or some other piece? Make your opponent <SELF-BLOCK> the flight squares, i.e., make him put his pieces on the squares that his king or queen needs to escape.

For a perfect example, see the end of the incredible "Immortal Problem" (http://www.blub.net/~vincent/proble...).

Dr. K. Bayer, The Immortal Problem (Era 1856): Mate in 9 moves. White to begin.


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Solution:
1. Rb7! Qxb7 2. Bxg6+! Kxg6 3. Qg8+ Kxf5
4. Qg4+ Ke5 5. Qh5+ Rf5 6. f4+! Bxf4
7. Qxe2+!! Bxe2


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And now the only factor that prevents 8 d3-d4 from being checkmate is the e4-flight square created by this pawn move. <WHEN THERE IS ONLY -ONE- FLIGHT SQUARE, MAKE THE OPPONENT <SELF-BLOCK> THAT SQUARE AND THEN THE TARGETED PIECE WILL BE TRAPPED!>

So White ends this incredible mating sequence with 8 ♖a4-e4+!! d5xe4 9 d3-d4+!.


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Also notice how White constantly sacrificed pieces on squares next to the Black e5-king and/or used <FORCING MOVES (CHECKS)> in order to make Black <SELF-BLOCK> these squares with Black pieces by recapturing or meeting the <CHECKS> (5 ... ♖f3-f5, 6 ... ♗h2xf4, 8 ... d5xe4), taking these squares away from the Black e5-king to use as <FLIGHT SQUARES>. It is for these reasons that it is difficult to defend squares near your king: you often end up simply <SELF-BLOCKING> your own king's <FLIGHT SQUARES> and getting mated.

40 Nd7+!! Bc6xNd7 Black d7-bishop takes d7 away from Black king
Kasparov vs Bareev, 2001 
(C07) French, Tarrasch, 41 moves, 1-0

40 .. b4-b3+! 41 a2xb3 self-blocks White c2-king's b3-flight sq
Ivanchuk vs Topalov, 2009 
(B99) Sicilian, Najdorf, 7...Be7 Main line, 54 moves, 0-1

43 Qg7+!! Nxg7 self-blocks g7 for 44 Ng8+ Kf7 45 Ng5#
Tal vs Hjartarson, 1987 
(C97) Ruy Lopez, Closed, Chigorin, 43 moves, 1-0

29 Rh5+!! Nxh5 self-blocks the h5-square for 30 g5#
T L Petrosian vs A Minasian, 2006 
(C67) Ruy Lopez, 30 moves, 1-0

10 - Qe8?? saves Black g6-knight but self-blocks Black e7-king
Zukertort vs Anderssen, 1865 
(C60) Ruy Lopez, 12 moves, 1-0

19 Rc1? restricts White b1-queen to b1-h7 diagonal, 19 ... Bf5!
Smyslov vs Gligoric, 1959 
(E61) King's Indian, 18 moves, 0-1

29 c6! dxc6?? 30 Bb5-c4# Black c6-pawn self-blocks d5-king
I Sokolov vs A Greet, 2007 
(E12) Queen's Indian, 31 moves, 1-0

34 ... Ke7-d8?? Black c8-queen now has no squares to move to
Zsuzsa Polgar vs Z Kiss, 1980 
(E87) King's Indian, Samisch, Orthodox, 36 moves, 1-0

40 - Bc3-d4+! makes White self-block e3-square for 41 - Rb1-f1#
M M Kazhgaleyev vs Judit Polgar, 2007 
(E71) King's Indian, Makagonov System (5.h3), 40 moves, 0-1

25 e6! f7xe6 self-blocks e6 from Black g7-knight, trapping it
Petrosian vs H Corral, 1954 
(D35) Queen's Gambit Declined, 29 moves, 1-0

13 Qb3-c2 provokes 13 ... Bc8-f5, self-blocking Black h5-queen
Rublevsky vs Ponomariov, 2007 
(B16) Caro-Kann, Bronstein-Larsen Variation, 18 moves, 1/2-1/2

39 Qd2-e2?? self-blocks e2-flight square of White d1-king
Rublevsky vs Grischuk, 2007 
(C45) Scotch Game, 39 moves, 0-1

43 Ra2xBc2? self-blocks c2-square of White b3-king, snap mate
J Trevelyan vs F Jenni, 2005 
(C68) Ruy Lopez, Exchange, 43 moves, 0-1

16 f4?? White f4-pawn occupies only flight square of e4-queen
Pelletier vs Mamedyarov, 2007 
(D94) Grunfeld, 26 moves, 0-1

29 ... Qh2+! 30 Bg1xh2 self-blocks h2-square for 30 ,,, Ng4-f2#
P Poutiainen vs Szabo, 1975 
(B57) Sicilian, 29 moves, 0-1

40 ... Rh2+!! 41 Qxh2 self-blocks the h2-square of the h1-king
Y Sakharov vs Kholmov, 1965 
(C95) Ruy Lopez, Closed, Breyer, 41 moves, 0-1

27 Rf4-f2?? traps White g1-king on back rank by denying f2-sq
Korchnoi vs I Krush, 2007 
(A28) English, 27 moves, 0-1

12 .. Bf8-e7?! leaves f6-queen no retreat; 15 Bc1-g5! traps her
Fischer vs V Ciocaltea, 1962 
(C75) Ruy Lopez, Modern Steinitz Defense, 26 moves, 1-0

18 ... Nf6-d7?! leaves c6-bishop no retreat for 19 Nb6-d5!!
Fischer vs H Rossetto, 1959 
(B41) Sicilian, Kan, 37 moves, 1-0

25 Qh4-f2? traps White g1-king on back rank for 25 .. Qc4xBc1+!
Colle vs Capablanca, 1929 
(A47) Queen's Indian, 34 moves, 0-1

31 Qh7+!! Nxh7 self-blocks the h7-square for 32 Rg6#
Hoi vs Gulko, 1988  
(A40) Queen's Pawn Game, 31 moves, 1-0

20 ... Be7-d8? takes away the d8-flight square from d5-queen
Sutovsky vs E Inarkiev, 2009 
(C42) Petrov Defense, 22 moves, 1-0

23 ... Re8-e7 stops mate on f7, self-blocks e7 allowing Qf6-h8#
Keres vs Szabo, 1955 
(B64) Sicilian, Richter-Rauzer Attack, 23 moves, 1-0

21 Bf3-g4+! forces Black to self-block d7-flight sq of c8-king
Carlsen vs Bareev, 2009 
(B12) Caro-Kann Defense, 26 moves, 1-0

96 h6-h7? takes away h7-flight square from the White g8-king
Kan vs Korchnoi, 1951 
(A04) Reti Opening, 96 moves, 0-1

60 Be2-f3?? self-blocks f3-flight sq for shocking 60 - Nf2-h3#!
T Jackelen vs G Welling, 1997 
(A46) Queen's Pawn Game, 60 moves, 0-1

38 ... Bf7-g8?? self-blocks g8-flight square for 39 Nf4-g6#
Tkachiev vs Ivanchuk, 2009 
(C01) French, Exchange, 39 moves, 1-0

41 ... Ne8-g7? self-blocks g8-king on back rank for 42 Ra6-c6!!
Aronian vs Nakamura, 2010 
(E98) King's Indian, Orthodox, Taimanov, 9.Ne1, 53 moves, 1-0

Shirov vs L Dominguez, 2010 
(B94) Sicilian, Najdorf, 30 moves, 1/2-1/2

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