:: Igo Hatsuyôron 120 (2015)

Variations of Our Solution (III)

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

This continues the "Variations of Our Solution (II)" (491).


    Variation Tree    

The Crosscut Sequence

@ 519 ++Captures the hanezeki's tail
@ 503Connects her single stone in atari
(A) @ 521 ++Occupies a liberty of Black's top right group (better endgame)
@ 523 +Inserts a kikashi on the lower edge
@ 521Continues occupying liberties
@ 524 ++Captures the hanezeki's tail
@ 521Continues occupying liberties
@ 526 ++Starts the semeai in the lower right
@ 522Continues occupying liberties in the upper right
@ 527 ++Plays tenuki (for demonstrative purposes)
@ 522Takes White's group off the board
(B) @ 528 ++Pushes into Black's upper left corner
@ 504Plays a sagari to live on the lower edge

(A) @ 530 ++Connects the hanezeki's tail
(B) @ 531 ++ (Ko)Pre-empts two eyes for White's group on the left edge
(C) @ 532 ++ (Ko)Captures the lower part of White's group on the left edge
@ 534 ++Jumps to defend the corner
@ 532Blocks from above
@ 535 + 3Plays a throw-in in the corner
@ 536 + 3Connects on the left edge
@ 538 + 3Pushes to the right first
@ 539 ++Plays sagari on the upper edge
@ 538Occupies a liberty of White's group at left
@ 536Gives atari in the corner
@ 535 ++Captures White's just played stone
@ 532Cuts on the upper edge
@ 541 ++ (Ko)Connects on the second line
@ 542 ++Captures the upper White stone
@ 541Captures the lower White stone
@ 532Connects on the left edge
@ 543 ++Captures White's upper stone
@ 533Captures White's lower stone
@ 504Closes the upper left corner

The Semeai Top Right Corner vs. Left Side

@ 544 ++Captures White's three stones in the lower left corner
@ 505Starts to cut White's upper group
@ 545 ++Attempts to connect on the third line
@ 505Cuts on the left edge
(.1) @ 546 ++Tries another bulky shape
(.2) @ 546 ++Gives atari
@ 505Builds the most bulky shape
(.1) @ 548 ++Gives atari from the inside at Black's nakade stones
(.2) @ 548k+2 +4 Gives atari at Black's single stone below

KataGo's new move suggestions are displayed in the two maps below.
Please note (with regard to the move numbers)
that we already inserted the Hanezeki Exchange therein.

Extensive elaborations on the continuations without Black's kikashi in the hanezeki
(and his forthcoming kikashi in the lower left) played before can be found in the
"No Kikashi" section of our variation tree ( 513a).

@ 505 + 3 Gives atari from the outside at Black's nakade stones

KataGo's New Move Suggestions

@ 548k+2 +4 Gives atari at Black's single stone below
(.1) @ 548ka ++ Captures White's single stone
(.2) @ 548kb+2 +4 Completes the nakade
@ 548kba+2 +2 Gives atari
@ 548kbb+2 +4 Plays the tsuke of Yamada Shinji
@ 548kba Connects the atari
@ 548kbc ++ Defends the top left corner
@ 548kbd ++ Connects solidly
@ 548kbc Captures White's just played stone
@ 548kba Connects solidly
@ 548kb Forces White from above
@ 548k Forces from above
(.1) @ 548kc ++ Takes the large endgame in the top left corner
(.2) @ 548kd ++ Gives atari from the right, for defending the top left corner
@ 548k Solidly connects at the bottom
@ 548k Plays KataGo's crosscut after the tsuke of Yamada Shinji
@ 548ke+2 +2 Gives atari from the outside
@ 548kea ++ Connects the atari
@ 548keb ++ (ko) Captures White's stone
@ 548kea Gives atari in the corner
@ 548kec ++ Cuts on the outside
@ 548kea Attaches in the corner
@ 548ked ++ (ko) Plays a forcing move in the corner
@ 548kea Connects on the outside
@ 548ke Captures a White stone
@ 548k Gives atari from the corner
@ 548kf+3 +3 Captures White's single stone
@ 548kfa ++ (ko) Gives counter-atari
@ 548kf Connects "peacefully"
@ 548k Connects the atari
@ 548kg+2 +1 Blocks at the bottom
@ 548k Blocks at the top

@ 548kh+1 Jigo Connects her single stone at the top right
@ 548k Plays KataGo's bad-shape move in the top left centre
(.1) @ 548kj+2 +1 Blocks immediately
(.2) @ 548kk+2 +4 KataGo's solid connection
@ 548kkaJigo Jigo Connects her single stone at the upper edge
@ 548kk Connects her single stone in the top right
@ 548kkb+2 +1 Continues with the Main Semeai
@ 548kk Captures White's single stone at the upper edge
@ 548k Plays tenuki to capture White's single stone in the top right centre
@ 548kl+1 +1 Pushes from above
@ 548klaJigo Jigo Connects her single stone at the upper edge
@ 548kl Attaches in the centre
@ 548klb+1 +1 Sacrifices one stone in the left centre
@ 548klcJigo +2 Destroys another point of White territory
@ 548klb Continues with the Main Semeai
@ 548kl Connects solidly
@ 548kld+1 +1 Continues with the Main Semeai
@ 548kl Captures White's single stone at the upper edge
@ 548k Plays a wedge in the left centre
(.1) @ 548klk+2 +2 Plays Dany's atekomi
(.2) @ 548klp+2 +4 Plays kikashi in the lower left
@ 548klq+2 Jigo Connects at the lower edge
@ 548klp Plays KataGo's solid connection
@ 548k Plays the attachment at the centre of three stones
@ 548km+2 Jigo Captures White's single stone at the upper edge
@ 548k Continues with the Main Semeai
@ 548kn+1 +1 Secures territory in the centre
@ 548kna+1 +1 Continues with the Main Semeai
@ 548kn Gives atari at the upper edge
@ 548k Connects her stone at the upper edge.
@ 548ko+2 +1 Captures White' single stone from below
@ 548k Plays Joachim's tesuji in the bamboo joint
@ 548kp+1 Jigo Solidly connects in the top right centre
@ 548k Occupies a liberty of Black's large group
@ 548kq          +1 Occupies another liberty of Black's large group – Semeai Variation
@ 548k+1 Captures the hanezeki's tail – Capture Variation

The Endgame on the Left Side

(.1) @ 549 + 4Gives atari on Black's single stone at the upper edge
(.2) @ 550 + 3 ≡Takes Black's nakade stones off the board (move order)
@ 552 + 6Gives atari on Black's hasami-tsuke stone
@ 554 ++Connects his stone in atari
@ 552Continues occupying liberties
@ 550Plays nozoki on the first line
@ 555 ++Defends the top left corner
@ 550Gives atari on White's group on the left edge
@ 557 + 5Captures the hanezeki's tail
@ 551Connects her stones
@ 559 ++Tries to capture White's tsuke stone
@ 551Blocks from the corner
@ 506Plays the tsuke of Yamada Shinji

(.1) @ 560 ++Tries to capture White's tsuke stone
@ 561 + 6Blocks from the corner
@ 560Connects his right-hand stones
@ 562 ++Starts building two eyes for his top left group
@ 560Tries to kill White's stones
(.2) @ 563 + 1Does not play the Hanezeki Exchange (demonstrative purposes)
@ 565JigoContinues occupying liberties
@ 563Plays atari in the hanezeki
@ , ,
506

Gives way, after some kikashi in the hanezeki
These kikashi should have been played immediately after the guzumi!
@ 566a + 2 Plays hane to attack Black's upper left corner
@ 566eJigo Connects the hanezeki's tail
@ 566a Captures four stones in the hanezeki
@ 566b + 2 Captures the hanezeki's tail
@ 566d + 1 Gives atari in the upper left corner
@ 566b Plays a peep at the second line
@ 566c + 10 Captures in the hanezeki
@ 566ca ++ Connects in the corner
(.1) @ 566cb + >10 Plays sagari at the upper edge
(.1) @ 566cc ++ Connects inside his formation
(.2) @ 566cd ++ Connects at the outside of his encirclement
@ 566cb Gives atari in the corner
(.2) @ 566ce + 6 Plays oki at the left edge
@ 566ca Pushes from below
@ 566c Gives atari in the corner
@ 566b Connects in the corner
@ 566a Kills Black's upper left corner
@ 503 Connects her four stones in the hanezeki
@ 566kJigo Plays KataGo's crosscut
@ 503 + 3 Pulls back

@ 567 + 3 ≡Threatens Black's upper territory only (technical matter)
@ 507Pre-empts one point of territory for Black in the centre
@ 569JigoPlays sagari on the lower edge (Semeai Variation)
(A) @ 570JigoGives atari on White's single stone
@ 571 ++Occupies a liberty from above
@ 570Occupies a liberty from below (move order)
(B) @ 572 ++Occupies a liberty of White's lower partial group
@ 569Connects solidly
@ 507Secures his territory in the centre
@ 573 + 2Connects his single stone in atari
@ 507Secures territory in the upper left

The Semeai Top Right Corner

vs. Left Side Again

(.1) @ 574 ++Plays a throw-in into the lower cutting point
(.2) @ 575 ++Tries building a nakade shape from the inside
@ 508Plays a nozoki on the left edge
@ 576 + 3 ≡Reduces Black's territory on the left-hand side (technical matter)
@ 508Occupies a liberty of Black's large group in the upper right
@ 578 + 1Continues occupying liberties (technical matter)
@ 509Occupies a point inside her eye on the left edge
@ 580 ++Occupies a shared liberty in the hanezeki
@ 509Gives atari on White's group on the left edge
@ 582 ++Connects the hanezeki's tail
@ 510Plays inside White's eye on the left edge

White's Final Decision

@ 583 + 5Capture Variation
@ 585 + 9Continues occupying liberties
@ 583Plays oki inside Black's lower group in the previous hanezeki
@ 510Semeai Variation
@ 586 ++Occupies a shared liberty in the hanezeki
@ 511Occupies a liberty of White's group on the left edge
@ 587 +Plays tenuki (for demonstrative purposes only)
@ 512Takes Black's large group off the board

Copyright © 2020 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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