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book: Second Piatigorsky Cup 1966
Compiled by Baby Hawk
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This tournament featured ten of the strongest players in the world at the time. This included the current world champion, Petrosian, and the next two champions, Spassky, and Fischer.

The double round-robin format meant that each player played each other twice, once with white and once with black.

All ninety games are annotated by one or both players.

The book uses descriptive notation.

Round 1 July 17th
Petrosian vs Spassky, 1966 
(D58) Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) Syst, 29 moves, 1/2-1/2

Reshevsky vs Fischer, 1966 
(E92) King's Indian, 42 moves, 1/2-1/2

Portisch vs Najdorf, 1966 
(E67) King's Indian, Fianchetto, 33 moves, 1/2-1/2

Ivkov vs Larsen, 1966 
(E16) Queen's Indian, 46 moves, 1-0

J H Donner vs Unzicker, 1966 
(E55) Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation, 43 moves, 1/2-1/2

Round 2 July 19th
Spassky vs Unzicker, 1966 
(C95) Ruy Lopez, Closed, Breyer, 46 moves, 1-0

Larsen vs J H Donner, 1966 
(B67) Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7, 58 moves, 1/2-1/2

Najdorf vs Ivkov, 1966 
(D25) Queen's Gambit Accepted, 26 moves, 1-0

Fischer vs Portisch, 1966 
(C95) Ruy Lopez, Closed, Breyer, 71 moves, 1/2-1/2

Petrosian vs Reshevsky, 1966 
(E12) Queen's Indian, 41 moves, 1/2-1/2

Round 3 July 20th
Reshevsky vs Spassky, 1966 
(E43) Nimzo-Indian, Fischer Variation, 20 moves, 1/2-1/2

Portisch vs Petrosian, 1966 
(E63) King's Indian, Fianchetto, Panno Variation, 32 moves, 1-0

Ivkov vs Fischer, 1966 
(A49) King's Indian, Fianchetto without c4, 42 moves, 0-1

J H Donner vs Najdorf, 1966 
(E60) King's Indian Defense, 41 moves, 1/2-1/2

Unzicker vs Larsen, 1966 
(B61) Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2, 38 moves, 1/2-1/2

Round 4 July 21st
Spassky vs Larsen, 1966 
(B64) Sicilian, Richter-Rauzer Attack, 80 moves, 1/2-1/2

Najdorf vs Unzicker, 1966 
(E59) Nimzo-Indian, 4.e3, Main line, 26 moves, 1/2-1/2

Fischer vs J H Donner, 1966 
(C89) Ruy Lopez, Marshall, 34 moves, 1/2-1/2

Petrosian vs Ivkov, 1966 
(E75) King's Indian, Averbakh, Main line, 25 moves, 1/2-1/2

Reshevsky vs Portisch, 1966 
(D28) Queen's Gambit Accepted, Classical, 16 moves, 1/2-1/2

Round 5 July 24th
Portisch vs Spassky, 1966 
(E47) Nimzo-Indian, 4.e3 O-O 5.Bd3, 32 moves, 1/2-1/2

Ivkov vs Reshevsky, 1966 
(C84) Ruy Lopez, Closed, 93 moves, 1/2-1/2

J H Donner vs Petrosian, 1966 
(A56) Benoni Defense, 35 moves, 1/2-1/2

Unzicker vs Fischer, 1966 
(B92) Sicilian, Najdorf, Opocensky Variation, 77 moves, 1/2-1/2

Larsen vs Najdorf, 1966 
(E98) King's Indian, Orthodox, Taimanov, 9.Ne1, 69 moves, 1-0

Round 6 July 25th
Spassky vs Najdorf, 1966 
(D78) Neo-Grunfeld, 6.O-O c6, 36 moves, 1/2-1/2

Fischer vs Larsen, 1966 
(C82) Ruy Lopez, Open, 30 moves, 0-1

Petrosian vs Unzicker, 1966 
(D32) Queen's Gambit Declined, Tarrasch, 37 moves, 1/2-1/2

Reshevsky vs J H Donner, 1966 
(E55) Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation, 36 moves, 1-0

Portisch vs Ivkov, 1966 
(E75) King's Indian, Averbakh, Main line, 43 moves, 1/2-1/2

Round 7 July 27th
Ivkov vs Spassky, 1966 
(E17) Queen's Indian, 36 moves, 0-1

J H Donner vs Portisch, 1966 
(D35) Queen's Gambit Declined, 36 moves, 1/2-1/2

Unzicker vs Reshevsky, 1966 
(C93) Ruy Lopez, Closed, Smyslov Defense, 22 moves, 1/2-1/2

Larsen vs Petrosian, 1966 
(B39) Sicilian, Accelerated Fianchetto, Breyer Variation, 30 moves, 1-0

Najdorf vs Fischer, 1966 
(E75) King's Indian, Averbakh, Main line, 31 moves, 1-0

Round 8 July 28th
Spassky vs Fischer, 1966 
(D86) Grunfeld, Exchange, 50 moves, 1-0

Petrosian vs Najdorf, 1966 
(A05) Reti Opening, 86 moves, 1-0

Reshevsky vs Larsen, 1966 
(A96) Dutch, Classical Variation, 19 moves, 1/2-1/2

Portisch vs Unzicker, 1966 
(D11) Queen's Gambit Declined Slav, 59 moves, 1/2-1/2

Ivkov vs J H Donner, 1966 
(B16) Caro-Kann, Bronstein-Larsen Variation, 28 moves, 1/2-1/2

Round 9 July 31st
J H Donner vs Spassky, 1966 
(E44) Nimzo-Indian, Fischer Variation, 5.Ne2, 25 moves, 1/2-1/2

Unzicker vs Ivkov, 1966 
(B92) Sicilian, Najdorf, Opocensky Variation, 78 moves, 1-0

Larsen vs Portisch, 1966 
(C20) King's Pawn Game, 53 moves, 1-0

Najdorf vs Reshevsky, 1966 
(E53) Nimzo-Indian, 4.e3, 23 moves, 1/2-1/2

Fischer vs Petrosian, 1966 
(B48) Sicilian, Taimanov Variation, 40 moves, 1/2-1/2

Round 10 August 1st
Spassky vs Petrosian, 1966 
(D27) Queen's Gambit Accepted, Classical, 22 moves, 1/2-1/2

Fischer vs Reshevsky, 1966 
(C92) Ruy Lopez, Closed, 38 moves, 1-0

Najdorf vs Portisch, 1966 
(E14) Queen's Indian, 40 moves, 1/2-1/2

Larsen vs Ivkov, 1966 
(B08) Pirc, Classical, 57 moves, 1-0

Unzicker vs J H Donner, 1966 
(D19) Queen's Gambit Declined Slav, Dutch, 31 moves, 1/2-1/2

Round 11 August 3rd
Unzicker vs Spassky, 1966 
(B91) Sicilian, Najdorf, Zagreb (Fianchetto) Variation, 22 moves, 1/2-1/2

J H Donner vs Larsen, 1966 
(D72) Neo-Grunfeld, 5.cd, Main line, 41 moves, 1-0

Ivkov vs Najdorf, 1966 
(E19) Queen's Indian, Old Main line, 9.Qxc3, 20 moves, 1/2-1/2

Portisch vs Fischer, 1966 
(E45) Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation, 35 moves, 0-1

Reshevsky vs Petrosian, 1966 
(E55) Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation, 22 moves, 1/2-1/2

Round 12 August 4th
Spassky vs Reshevsky, 1966 
(E55) Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation, 50 moves, 1/2-1/2

Petrosian vs Portisch, 1966 
(D67) Queen's Gambit Declined, Orthodox Defense, Bd3 line, 71 moves, 1/2-1/2

Fischer vs Ivkov, 1966 
(A07) King's Indian Attack, 29 moves, 1-0

Najdorf vs J H Donner, 1966 
(D25) Queen's Gambit Accepted, 38 moves, 1-0

Larsen vs Unzicker, 1966 
(A38) English, Symmetrical, 40 moves, 0-1

Round 13 August 7th
Larsen vs Spassky, 1966 
(D25) Queen's Gambit Accepted, 43 moves, 0-1

Unzicker vs Najdorf, 1966 
(B83) Sicilian, 48 moves, 1/2-1/2

J H Donner vs Fischer, 1966 
(E67) King's Indian, Fianchetto, 28 moves, 0-1

Ivkov vs Petrosian, 1966 
(E19) Queen's Indian, Old Main line, 9.Qxc3, 30 moves, 1/2-1/2

Portisch vs Reshevsky, 1966 
(E45) Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation, 41 moves, 1/2-1/2

Round 14 August 8th
Spassky vs Portisch, 1966 
(C93) Ruy Lopez, Closed, Smyslov Defense, 23 moves, 1/2-1/2

Reshevsky vs Ivkov, 1966 
(B08) Pirc, Classical, 52 moves, 1/2-1/2

Petrosian vs J H Donner, 1966 
(A07) King's Indian Attack, 55 moves, 1-0

Fischer vs Unzicker, 1966 
(C83) Ruy Lopez, Open, 63 moves, 1/2-1/2

Najdorf vs Larsen, 1966 
(E73) King's Indian, 50 moves, 1/2-1/2

Round 15 August 10th
Najdorf vs Spassky, 1966 
(D58) Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) Syst, 22 moves, 1/2-1/2

Larsen vs Fischer, 1966 
(E75) King's Indian, Averbakh, Main line, 43 moves, 0-1

Unzicker vs Petrosian, 1966
(B92) Sicilian, Najdorf, Opocensky Variation, 23 moves, 1/2-1/2

J H Donner vs Reshevsky, 1966 
(E67) King's Indian, Fianchetto, 41 moves, 1/2-1/2

Ivkov vs Portisch, 1966 
(C49) Four Knights, 73 moves, 0-1

Round 16 August 11th
Spassky vs Ivkov, 1966 
(E63) King's Indian, Fianchetto, Panno Variation, 30 moves, 1/2-1/2

Portisch vs J H Donner, 1966 
(A33) English, Symmetrical, 19 moves, 1-0

Reshevsky vs Unzicker, 1966 
(E55) Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation, 41 moves, 1/2-1/2

Petrosian vs Larsen, 1966 
(A16) English, 61 moves, 0-1

Fischer vs Najdorf, 1966 
(B44) Sicilian, 47 moves, 1-0

Round 17 August 14th
Fischer vs Spassky, 1966 
(C89) Ruy Lopez, Marshall, 35 moves, 1/2-1/2

Najdorf vs Petrosian, 1966 
(E60) King's Indian Defense, 74 moves, 0-1

Larsen vs Reshevsky, 1966 
(A57) Benko Gambit, 45 moves, 1-0

Unzicker vs Portisch, 1966
(C95) Ruy Lopez, Closed, Breyer, 21 moves, 1/2-1/2

J H Donner vs Ivkov, 1966 
(A42) Modern Defense, Averbakh System, 35 moves, 0-1

Round 18 August 15th
Spassky vs J H Donner, 1966 
(C86) Ruy Lopez, Worrall Attack, 35 moves, 1-0

Ivkov vs Unzicker, 1966 
(C49) Four Knights, 30 moves, 1/2-1/2

Portisch vs Larsen, 1966 
(A30) English, Symmetrical, 32 moves, 1/2-1/2

Reshevsky vs Najdorf, 1966 
(E41) Nimzo-Indian, 54 moves, 1-0

Petrosian vs Fischer, 1966 
(E62) King's Indian, Fianchetto, 28 moves, 1/2-1/2

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