:: Igo Hatsuyôron 120 (2015)

Variations of Our Solution (I)

This chapter explains all variations, as far as they do not relate specifically to the professional solution.


    Variation Tree    

The Road to Hanezeki

(.1) @ 57 +Tries to connect top and bottom
@ 59 +Captures White's group on the left side
@ 58Secures the connection of his own groups
(.2) @ 60 +Tries to capture White's upper group in the hanezeki
@ 39Connects his single stone in the lower right to the bottom group
@ 61 + 3 ≡≡Threatens Black's connection (move order)
@ 40Plays sagari in the lower right corner
@ 62 +Encloses White's upper group in the hanezeki
@ 40Connects his two upper stones in the hanezeki
(.1) @ 63 + 3 ≡≡Plays tsuke (move order)
(.2) @ 64 ++Plays a diagonal move
@ 65 ++Tries to capture White's upper group in the hanezeki
@ 64Connects his groups in the hanezeki
@ 66 +Tsuke below
@ 64Tsuke above
@ 40Tries to connect out with a Knight's move

@ 67 ++Cuts to the left of Black's single stone
@ 68 ++Captures in the corner
@ 69 ++Tries to break out of White's encirclement
@ 70 ++Tries to stop Black's flight in the centre earlier, from above
@ 69Blocks to the left
@ 68Continues the semeai in the corner immediately
@ 67Occupies an external liberty
@ 40Cuts below Black's single stone
@ 71 + 3 ≡≡Plays the push from the right first (move order)
@ 72 + 2Does not play a throw-in
@ 77 ++ (Ko)Connects the lower cutting point
@ 79 ++Completes the Crosscut Sequence
@ 81 ++Throws-in in the hanezeki (move order)
@ 80Captures White's four stones
@ 77Plays the hiki on the upper edge
@ 82 ++ (Ko)Tries enforcing Black to occupy own liberties
@ 78Occupies a liberty in the hanezeki
@ 72Connects the upper cutting point
@ 83 ++ (Ko)Spoils White's shape on the upper edge
@ 85 ++ (Ko)Starts the ko-fight extremely "early"
@ 83Plays a protective move in the nakade
@ 72Lengthens the hanezeki's tail

@ 87 ++Initiates the Crosscut Sequence, follows the classical line of play
@ 89 ++Occupies a liberty of Black's group (demonstrative purposes)
@ 87Connects the cutting point in the hanezeki
@ 72Pushes into White's top right corner
@ 90 + 2 ≡Initiates the Crosscut Sequence
(.1) @ 91 ++ (Ko)Plays Joachim's hiki
@ 93 + (Ko)Creates a false eye from the right first
@ 91Reduces White's eye from the left
@ , 95 ++ (Ko)Push and hane in the top left
@ 97 ++ (Ko)Atari at top as ko-threat
@ 95Atari on the left side as ko-threat
@ 91Takes a shared liberty in the centre
(.2) @ 98 ++ (Ko)Captures White's group on the left side
@ 100 ++ (Ko)Pre-empts White's ko-threats at top
@ 98Occupies a shared liberty
@ 90Closes the top left corner
@ 73Plays the guzumi
@ 101 + 3Initiates the Capture Variation
@ 74Chooses the Semeai Variation

@ 71Plays the first throw-in

@ 41Plays the cut first
@ 103 ++Captures two stones for an eye
@ 41Threatens to connect his single stone in the hanezeki
@ 105 ++Starts the semeai in the lower right corner
@ 106 ++Captures one stone on the outside
@ 105Sacrifices three stones in the corner
@ 42Captures White's two single stones
(.1) @ 107 ++Captures Black's two stones in the corner
(.2) @ 109 ++Connects her two single stones inside Black's group
@ 42Plays sagari in the corner
(.1) @ 110 ++Starts the hanezeki's tail first
@ 111 ++Further lengthens the hanezeki's tail
@ 110Cuts White's groups
(.2) @ 112 ++Captures White's two single stones
@ 42Creates a three-stone nakade in the corner

The Hanezeki's Tail

@ 113 ++Captures White's three stones
@ 114 ++Attacks White's group on the lower edge
@ 113Starts the semeai in the corner
@ 43Starts the hanezeki's tail
@ 115 ++Blocks the hanezeki's tail
@ 116 ++Gives atari on White's two stones
@ 115Captures White's three stones
@ 43Gives way
@ 58ah +2 Pushes into White's corner; "early" guzumi (@ P) thereafter
@ 43Lengthens the hanezeki's tail
@ 117 ++Blocks the hanezeki's tail
@ 43Gives way
@ 118 +Does not play the kikashi
@ 43Threatens to cut on the lower edge
@ 119 ++Gives atari on the hanezeki's tail
@ 120 ++Connects the hanezeki's tail
@ 119Cuts on the lower edge
@ 43Connects her groups
@ 121 ++Tries to escape with his large top right group into the centre
@ 122 ++Cuts White's group on the lower edge
@ 121Lengthens his large group
@ 43Lengthens the hanezeki's tail

@ 123 ++Plays a geta
@ 44Gives way while taking the hanezeki's tail a liberty
@ 124 ++Blocks the hanezeki's tail
@ 44Gives way
@ 125 ++Occupies the right-hand liberty of the hanezeki's tail
@ 44Occupies the upper liberty of the hanezeki's tail
@ 126 ++Gives atari on the hanezeki's tail
@ 44Connects her single stone
@ 127 ++Plays a wedge to the right
@ , 128 ++ (Ko)Plays Joachim's hiki after the Crosscut Sequence
@ 128a ++ (Ko) Attacks White's centre group from the top left
@ 128b ++ (Ko) Closes the top left corner
@ 128a Attacks White's centre group from the top right
(.1) @ 128c ++ (Ko) Gives atari from below
(.2) @ 128d ++ (Ko) Plays a diagonal move from the right
@ 128e ++ Gives atari from below
@ 128f ++ (Ko) Plays an oki at the top edge
@ 128e Plays hane on the first line
@ 128d Blocks the corner
(.3) @ 128g ++ Attaches in the corner
@ 128h ++ Plays a hiki in the corner
@ 128g Blocks the corner
@ 128a Blocks the corner
@ 128 Creates the ko shape at the right
@ 127Plays the guzumi
@ 130 ++Occupies a liberty of Black's large top right group
@ 127Secures life for her bottom group
@ 44Solidly lengthens the hanezeki's tail
@ 131 ++ (Ko)Gives atari on the hanezeki's tail
@ 45Connects her single stone in atari

@ 133 + 5Wedges into White's shape on the upper edge
@ 135 +Cuts from below
@ 133Blocks from above
@ 137 + 3Plays the guzumi
@ 133Continues with the Crosscut Sequence
(.1) @ 138 ++ (Ko)Plays Joachim's hiki on the upper edge
@ 142 ++ (Ko)Continues on the upper edge
@ 144 ++Captures two stones on the upper edge
@ 142Answers in the centre
@ 138Plays Michael Redmond's kikashi in the bamboo joint
@ 145 ++Blocks solidly from the top left corner
@ 146 ++ (Ko)Separates White from below
@ 148 ++ (Ko)Occupies a shared liberty
@ 145Occupies an outside liberty
@ 145Blocks from above
@ 148 ++ (Ko)Initiates a ko in the upper left corner
@ 145Defends his group on the upper edge
@ 139Defends the top left corner by jumping back

(.1) @ 150 ++ (Ko)Starts the ko-fight "early" (longer sequence)
@ 151 ++ (Ko)Continues with occupying liberties
@ 150Pre-empts a Black ko-threat
(.2) @ 152 ++ (Ko)Pre-empts another ko-shape in the centre
@ 154 ++ (Ko)Cuts inside White's shape
@ 152Plays sagari on the upper edge
(.1) @ 155 ++ (Ko)Connects her single stone in the top left corner
(.2) @ 156 ++ (Ko)Pushes into the top left corner from below
@ 152Solidifies her shape on the upper edge
@ 157 ++ (Ko)Plays a protective move on the left side
@ 153Continues with occupying liberties
@ 159 ++ (Ko)Fills-in her false eyes
@ 153Starts the ko "late"
@ 140Plays a protective move in the nakade

(.1) @ 160 ++ (Ko)Plays the Hanezeki Exchange
(.2) @ 161 ++ (Ko)Wedges into White's shape on the upper edge
(.3) @ 162 ++ (Ko)Plays a ko-threat in the nakade
@ 140Cuts on the upper edge
@ 163 ++ (Ko)Plays a gote move in the hanezeki
@ 141Occupies a liberty in the hanezeki

(.2) @ 164 ++Captures White's left side
@ 133Closes the top left corner

@ 45Solidly lengthens the hanezeki's tail
@ 165 ++ (Ko)Blocks the hanezeki's tail from the left
@ 45Gives way

The Top Right Corner

@ 166 + 1Plays the hasami-tsuke in the upper right corner
@ 168 + 1Connects along the upper edge
@ 166Plays the push
@ 45Plays the push in the upper right corner first
(A) @ 169 + 3 ≡≡Gives way, and plays a jump on the second line
@ 172 + 3 ≡≡Pushes from the left into White's upper right corner
(B) @ 173 +Connects her three stones
(C) @ 174 +Plays tenuki to play in the top left corner
@ 172Connects the atari
@ 169Plays the guzumi
(B) @ 175 +Blocks the top right corner to the left
(C) @ 176 +Connects her single stone in the centre
@ 177 +Connects her single stone to the right
@ 176Plays sagari
@ 46Blocks from above
@ 178 +Connects her single stone in the centre
@ 46Lengthens her single stone
@ 179 +Connects her single stone in the centre
@ 180 +Plays on the guzumi-point
@ 179Blocks the corner
@ 46Blocks the corner

Copyright © 2020 Thomas Redecker.

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