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OPENINGS THEORY
- ECO CODES BASE -
- A02 -
BIRD'S OPENING
(1.f4)
[A02-a] - Bird's opening
1.f4 =
(SMOP: (Strongly Mixed Opening))
(see also: A03, A15, A34, A40, A41, A43, A45, A80, B00, B02, B06,
B07, B09, B10, B12, B15, B20, B21, B22, B23, B24, B25, B73, B74,
C00, C28, C29, C30 to C39, D00, D05, E76, E79) (1...a6, 1...h6,
1...Nh6, 1...h5, 1...f6, 1...g5)
(1...d5: A03-QPOP (Quasi Pure Opening))
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[A02-b] - Bird's opening
Krzysztanowska retort: 1...c6
1.f4 c6?! +/=
(RMOP:) (see also: A03, B06, B07, B10, B12, B15)
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[A02-c] - Bird's opening
Van der Weide retort: 1...b5
1.f4 b5?! +/=
(TPOP: (Totally Pure Opening))
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[A02-d] - Bird's opening
Falkbeer retort: 1...Nc6
1.f4 Nc6?! +/=
(RMOP:) (see also: A03, B00, B07, C30, C34, C45, D00)
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[A02-e] - Bird's opening
Zytogorsky retort: 1...b6
1.f4 b6! =/+
(QPOP: (Quasi Pure Opening))
(see also: A03, B00, C00)
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[A02-f] - Bird's opening
Fraser retort: 1...f5
1.f4 f5 +/=
(QPOP: (Quasi Pure Opening))
(see also: A10, A80, A84, C30)
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[A02-g] - Bird's opening
Fraser retort: 1...f5
Symetrical variation: 2.Nf3 Nf6
1.f4 f5 2.Nf3 Nf6 +/=
(QPOP: (Quasi Pure Opening))
(see also: A80, A84)
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[A02-h] - Bird's opening
Hodges retort: 1...d6
1.f4 d6 +/=
(RMOP: (Relatively Mixed Opening))
(see also: A40, A41, A43, A45, B02, B06, B07, B09,
B20, B21, B22, B23, B25, C24, C30, C34, C38, E76, E77)
(2.e3, 2.b3, 2.d4)
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[A02-i] - Bird's opening
Hodges retort: 1...d6
Bohatirchuk-Sorokin system: 2.Nf3
1.f4 d6 2.Nf3 =
(RMOP: (Relatively Mixed Opening))
(see also: A40, A43, A45, B06, B07, B09, B20, B21, B23, B25,
C30, C34, C38, E76)
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[A02-j] - Bird's opening
Hodges retort: 1...d6
Bohatirchuk-Sorokin system: 2...Nf6
1.f4 d6 2.Nf3 Nf6 =
(RMOP: (Relatively Mixed Opening))
(see also: A45, A68, B02, B07, B09, B20, B21, B22, B23, B25,
C30, C34)
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[A02-k] - Bird's opening
Hodges retort: 1...d6
Bohatirchuk-Sorokin system: 3.e3
1.f4 d6 2.Nf3 Nf6 3.e3 =
(QPOP: (Quasi Pure Opening))
(see also: A45)
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[A02-l] - Bird's opening
Buckle retort: 1...e6
1.f4 e6 =
(RMOP:) (see also: A03, B21, B23, C00, D00) (2.Nf3 d5:
A03-QPOP)
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[A02-m] - Bird's opening
Buckle retort: 1...e6
Bird-Schallopp system: 2.Nf3 Nf6
1.f4 e6 2.Nf3 Nf6 (3.e3) +/=
(RMOP:) (see also: A03, D00)
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[A02-n] - Bird's opening
Buckle retort: 1...e6
1.f4 g6! (2.e3) =/+
(RMOP:) (see also: A03, A10, A40, A43, A45, A68, B06, B07, B09,
B12, B15, B20, B21, B22, B23, B24, B25, D00, E76, E79)
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[A02-o] - Bird's opening
Buckle retort: 1...e6
Bird-Tinsley system: 2.Nf3
1.f4 g6! 2.Nf3 =/+
(RMOP:) (see also: A03, A40, A42, A45, B06, B07, B09, B15,
B20, B21, B22, B23, B24, B25, B73, D00)
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[A02-p] - Bird's opening
Buckle retort: 1...e6
Bird-Tinsley system: 2.Nf3 Bg7
1.f4 g6! 2.Nf3 Bg7 =/+
(RMOP:) (see also: A03, A40, A45, B06, B07, B09, B15,
B20, B21, B23, B25, E76)
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[A02-q] - Bird's opening
Buckle retort: 1...e6
Bird-Tinsley system: 2.Nf3 Bg7 3.e3
1.f4 g6! 2.Nf3 Bg7 3.e3 =/+
(RMOP:) (see also: A03, A40, A45, D00)
(BSIA: (Black Significant Advantage))
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[A02-r] - Bird's opening
Buckle retort: 1...e6
Kostic-Udovic system: 2.Nf3 Nf6
1.f4 g6! 2.Nf3 Nf6 =/+
(RMOP:) (see also: A03, A45, A68, B07, B09, B20, B22, B23, B25,
D00, E79)
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[A02-s] - Bird's opening
Buckle retort: 1...e6
Kostic-Udovic system: 2.Nf3 Nf6
Mazel line: 3.b3
1.f4 g6! 2.Nf3 Nf6 3.b3?! =/+
(QPOP: (Quasi Pure Opening))
(see also: A03)
(BSIA: (Black Significant Advantage))
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[A02-t] - Bird's opening
Buckle retort: 1...e6
Kostic-Udovic system: 2.Nf3 Nf6 3.g3
1.f4 g6! 2.Nf3 Nf6 3.g3 =
(RMOP:) (see also: A03, B20, B25) (3...d5: [A03-TPOP)
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[A02-u] - Bird's opening
Buckle retort: 1...e6
Kostic-Udovic system: 3.g3 Bg7
1.f4 g6! 2.Nf3 Nf6 3.g3 Bg7 =
(RMOP:) (see also: A03, B20, B25) (3...d5: A03-TPOP)
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[A02-v] - Bird's opening
Buckle retort: 1...e6
Kostic-Udovic system: 4.Bg2 0-0
1.f4 g6! 2.Nf3 Nf6 3.g3 Bg7
4.Bg2 0-0 =
(RMOP:) (see also: A03, B20, B25) (4...d5: A03-TPOP)
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[A02-w] - Bird's opening
Buckle retort: 1...e6
Kostic-Udovic system: 4.Bg2 0-0 5.0-0
1.f4 g6! 2.Nf3 Nf6 3.g3 Bg7
4.Bg2 0-0 5.0-0 =
(RMOP:) (see also: A03, B20, B25) (4...d5: A03-TPOP)
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[A02-x] - Bird's opening
Kennedy retort: 1...c5
1.f4 c5! =/+
(RMOP:) (see also: A03, A30, A45, B00, B21, B22, B23, B24, B25,
B84, C00, C02, D00)
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[A02-y] - Bird's opening
Kennedy retort: 1...c5
William-Staunton system: 2.e3
1.f4 c5! 2.e3 =/+
(RMOP:) (see also: A03, B13, D00)
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[A02-z] - Bird's opening
Kennedy retort: 1...c5
Hellmann-Traubner system: 2.b3
1.f4 c5! 2.b3 =
(RMOP:) (see also: A03, B20)
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[A02-a*] - Bird's opening
Kennedy retort: 1...c5
Basjuni-Pedersen system: 2.Nf3
1.f4 c5! 2.Nf3 =/+
(RMOP:) (see also: A03, B20, B21, B22, B23, B25, C00, C02, D00)
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[A02-b*] - Bird's opening
Basjuni-Pedersen system: 2.Nf3
Jaffe retort: 2...Nf6
1.f4 c5! 2.Nf3 Nf6 =/+
(RMOP:) (see also: A03, A15, A45, B20, B21, B23, B25)
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[A02-c*] - Bird's opening
Basjuni-Pedersen system: 2.Nf3 Nc6
1.f4 c5! 2.Nf3 Nc6 =/+
(RMOP:) (see also: A03, B20, B21, B22, B24, B25, C00)
(3.Nc3, 3.d3, 3.b3)
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[A02-d*] - Bird's opening
Basjuni-Pedersen system: 2.Nf3 Nc6
Chigorin retort: 3.e3
1.f4 c5! 2.Nf3 Nc6 3.e3 =
(RMOP:) (see also: A03, D00)
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[A02-e*] - Bird's opening
Basjuni-Pedersen system: 3.g3
1.f4 c5! 2.Nf3 Nc6 3.g3 (g6) =/unclear
(RMOP:) (see also: A03, B20, B24, B25)
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[A02-f*] - Bird's opening
From gambit: 1...e5
1.f4 e5!? =
(RMOP:) (see also: B12, C30 to C39)
(2.d4, 2.Nc3, 2.Nf3, 2.e3, 2.d3)
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[A02-g*] - Bird's opening
From gambit: 1...e5 2.fxe5
1.f4 e5!? 2.fxe5 (Nc6) =
(RMOP:) (see also: B12, C30)
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[A02-h*] - Bird's opening
From gambit: 2.fxe5 d6
Deacon retort: 3.Nf3
1.f4 e5!? 2.fxe5 d6 3.Nf3?! =/+
(RMOP:) (see also: C30)
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[A02-i*] - Bird's opening
From gambit: 2.fxe5 d6 3.exd6
1.f4 e5!? 2.fxe5 d6 3.exd6! +/=
(TPOP: (Totally Pure Opening))
(3...Bf5, 3...Nc6, 3...Bg4, 3...Nf6)
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[A02-j*] - Bird's opening
From gambit: 2.fxe5 d6 3.exd6 Bxd6
1.f4 e5!? 2.fxe5 d6 3.exd6! Bxd6 +/=
(TPOP: (Totally Pure Opening))
(4.e3, 4.d4, 4.g3)
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[A02-k*] - Bird's opening
From gambit: 3.exd6 Bxd6 4.Nf3
1.f4 e5!? 2.fxe5 d6 3.exd6! Bxd6 4.Nf3 +/=
(TPOP: (Totally Pure Opening))
(4...Nh6, 4...Nc6, 4...Bg4)
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[A02-l*] - Bird's opening
From gambit: 3.exd6 Bxd6 4.Nf3
Steinitz retort: 4...Nf6
1.f4 e5!? 2.fxe5 d6 3.exd6! Bxd6 4.Nf3 Nf6 +/=
(TPOP: (Totally Pure Opening))
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[A02-m*] - Bird's opening
From gambit: 3.exd6 Bxd6 4.Nf3
Lasker variation: 4...g5
1.f4 e5!? 2.fxe5 d6 3.exd6! Bxd6 4.Nf3 g5! =/unclear
(TPOP: (Totally Pure Opening))
(5.b3, 5.e4, 5.c3, 5.d3)
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[A02-n*] - Bird's opening
From gambit: 3.exd6 Bxd6 4.Nf3
Lasker variation: 4...g5
Bird retort: 5.d4
1.f4 e5!? 2.fxe5 d6 3.exd6! Bxd6 4.Nf3 g5! 5.d4
+/=
(TPOP: (Totally Pure Opening))
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[A02-o*] - Bird's opening
From gambit: 3.exd6 Bxd6 4.Nf3
Lasker variation: 4...g5
Larsen-Zuidema system: 5.g3
1.f4 e5!? 2.fxe5 d6 3.exd6! Bxd6 4.Nf3 g5! 5.g3
=
(TPOP: (Totally Pure Opening))
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[A02-p*] - Bird's opening
From gambit: 3.exd6 Bxd6 4.Nf3
Lasker variation: 4...g5
Larsen-Zuidema system: 5.g3 g4
1.f4 e5!? 2.fxe5 d6 3.exd6! Bxd6 4.Nf3 g5! 5.g3 g4 (6.Nh4)
=
(TPOP: (Totally Pure Opening))
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[A02-q*] - Bird's opening
Ribeiro-Dantas variation: 1...Nf6
1.f4 Nf6! =/+
(RMOP:) (see also: A03, A15, A19, A45, A68, B02, B07, B09, B20,
B22, B23, B25, C30, C34, D00)
(2.c3, 2.c4, 2.d3, 2.Nc3)
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[A02-r*] - Bird's opening
Ribeiro-Dantas variation: 1...Nf6
Barczay retort: 2.g3
1.f4 Nf6! 2.g3 =
(RMOP:) (see also: A03, B20, B25)
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[A02-s*] - Bird's opening
Ribeiro-Dantas variation: 1...Nf6
Tartakower retort: 2.e3
1.f4 Nf6! 2.e3 =
(RMOP:) (see also: A03, A45, D00)
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[A02-t*] - Bird's opening
Ribeiro-Dantas variation: 1...Nf6
O'Donavan retort: 2.b3
1.f4 Nf6! 2.b3 =
(RMOP:) (see also: A03)
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[A02-u*] - Bird's opening
Ribeiro-Dantas variation: 1...Nf6
O'Donavan retort: 2.b3
Klausen line: 2...c5
1.f4 Nf6! 2.b3 c5! =/+
(RMOP:) (see also: A03)
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[A02-v*] - Bird's opening
Ribeiro-Dantas variation: 1...Nf6
O'Donavan retort: 2.b3
Becker line: 2...g6
1.f4 Nf6! 2.b3 g6! =/+
(QPOP:) (see also: A03)
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[A02-w*] - Bird's opening
Ribeiro-Dantas variation: 1...Nf6
Ware retort: 2.d4
1.f4 Nf6! 2.d4?! =/+
(RMOP:) (see also: A03, A45, D00, E76)
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[A02-x*] - Bird's opening
Ribeiro-Dantas variation: 1...Nf6 2.Nf3
1.f4 Nf6! 2.Nf3 =/+
(RMOP:) (see also: A03, A45, B07, B09, B20, B22, B23, B25,
C30, C34, D00, E79)
(2...h6, 2...a5, 2...b5, 2...Nc6)
(2.Nf3 d5: A03-QPOP)
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[A02-y*] - Bird's opening
Ribeiro-Dantas variation: 1...Nf6 2.Nf3
Barroso retort: 2...b6
1.f4 Nf6! 2.Nf3 b6?! =
(QPOP:) (see also: A03)
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[A02-z*] - Bird's opening
Ribeiro-Dantas variation: 1...Nf6 2.Nf3
Schallopp retort: 2...e6
1.f4 Nf6! 2.Nf3 e6?! +/=
(RMOP:) (see also: A03, D00)
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[A02-a**] - Bird's opening
Ribeiro-Dantas variation: 1...Nf6 2.Nf3
Sorokin retort: 2...d6
1.f4 Nf6! 2.Nf3 d6 =
(RMOP:) (see also: A45, B07, B09, B20, B22, B23, B25,
C28, C30, C34)
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[A02-b**] - Bird's opening
Ribeiro-Dantas variation: 1...Nf6 2.Nf3
Jaffe retort: 2...c5
1.f4 Nf6! 2.Nf3 c5! =/+
(RMOP:) (see also: A03, A15, A45, B20, B21, B22, B25)
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[A02-c**] - Bird's opening
Ribeiro-Dantas variation: 2.Nf3 g6
1.f4 Nf6! 2.Nf3 g6! =/+
(RMOP:) (see also: A03, A45, B07, B09, B20, B22, B25,
D00, E79)
(3.c3, 3.c4, 3.b4, 3.Nc3, 3.d4)
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[A02-d**] - Bird's opening
Ribeiro-Dantas variation: 2.Nf3 g6
Kan retort: 3.d3
1.f4 Nf6! 2.Nf3 g6! 3.d3 =/+
(RMOP:) (see also: A03, B07, B20, B22)
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[A02-e**] - Bird's opening
Ribeiro-Dantas variation: 2.Nf3 g6
Menchik retort: 3.e3
1.f4 Nf6! 2.Nf3 g6! 3.e3 =/+
(RMOP:) (see also: A03, A45, D00)
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[A02-f**] - Bird's opening
Ribeiro-Dantas variation: 2.Nf3 g6
Kostic retort: 3.g3
1.f4 Nf6! 2.Nf3 g6! 3.g3 =
(RMOP:) (see also: A03, B20, B25)
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[A02-g**] - Bird's opening
Ribeiro-Dantas variation: 2.Nf3 g6 3.b3
1.f4 Nf6! 2.Nf3 g6! 3.b3?! =/+
(QPOP:) (see also: A03)
(3...c5) (3...d5: A03-TPOP)
(BSIA: (Black Significant Advantage))
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[A02-h**] - Bird's opening
Ribeiro-Dantas variation: 3.b3 Bg7
1.f4 Nf6! 2.Nf3 g6! 3.b3?! Bg7 =/+
(QPOP:) (see also: A03) (4.e3)
(BSIA: (Black Significant Advantage))
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[A02-i**] - Bird's opening
Ribeiro-Dantas variation: 4.Bb2
1.f4 Nf6! 2.Nf3 g6! 3.b3?! Bg7
4.Bb2 =/+
(QPOP:) (see also: A03)
(4...b6, 4...c5, 4...d6) (4...d5: A03-TPOP)
(BSIA: (Black Significant Advantage))
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[A02-j**] - Bird's opening
Ribeiro-Dantas variation: 4.Bb2 0-0
1.f4 Nf6! 2.Nf3 g6! 3.b3?! Bg7
4.Bb2 0-0 =/+
(QPOP:) (see also: A03) (5.c4, 5.g3)
(BSIA: (Black Significant Advantage))
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[A02-k**] - Bird's opening
Ribeiro-Dantas variation: 4.Bb2 0-0 5.e3
1.f4 Nf6! 2.Nf3 g6! 3.b3?! Bg7
4.Bb2 0-0 5.e3 =/+
(QPOP:) (see also: A03) (5.c4, 5.g3)
(BSIA: (Black Significant Advantage))
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[A02-l**] - Bird's opening
Ribeiro-Dantas variation: 5.e3 d6
1.f4 Nf6! 2.Nf3 g6! 3.b3?! Bg7
4.Bb2 0-0 5.e3 d6 =/+
(TPOP: (Totally Pure Opening))
(BSIA: (Black Significant Advantage))
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[A02-m**] - Bird's opening
Ribeiro-Dantas variation: 5.e3 d6 6.Be2
1.f4 Nf6! 2.Nf3 g6! 3.b3?! Bg7
4.Bb2 0-0 5.e3 d6 6.Be2 =/+
(TPOP: (Totally Pure Opening))
(BSIA: (Black Significant Advantage))
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[A02-n**] - Bird's opening
Ribeiro-Dantas variation: 6.Be2 c5 (7.0-0)
1.f4 Nf6! 2.Nf3 g6! 3.b3?! Bg7
4.Bb2 0-0 5.e3 d6 6.Be2 c5 (7.0-0) =/+
(TPOP: (Totally Pure Opening))
(BSIA: (Black Significant Advantage))
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