# New Story Line 2022

# Fujisawa Hideyuki's First Throw-in

The first throw-in of Fujisawa Hideyuki 9p in the hanezeki seems to be such a "natural" move that it did not deserve the slightest professional comment. We will analyse the specific peculiarities of this move, the most important of which is the reduction of White liberties in the temporary seki in the middle of the right side. White could well have won the game by one point on the basis of this classical knowledge alone, if only she remembered her already well-known oki after capturing the hanezeki's tail!
Current analyses with KataGo led to the finding that White could have made a
Choosing Harry's Hasami-Tsuke Sequence for the reduction of White's upper left corner in due time would not only increase Black's flexibility in the game, but also affect the overall result, as KataGo discovered. White's additional gain would be reduced to
In conjunction with my Guzumi, the remaining disadvantage of | |

Referenced by ( 2022MainLine) Let's go back to the dawn of time ... | |

( 2022MainLine) | |

: ( As a side effect, the sacrifice of this first throw-in stone will benefit Black by one point in the Capture Variation. We will analyse in the subvariation below what happens if Black mistakenly forgoes this throw-in and continues immediately with the move at . | |

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: : Please note the entire reduction of White's upper right corner will : : Decades later, the world of amateurs will come up with Harry's Hasami-Tsuke of , instead. : Please note that Fujisawa Hideyuki's sequence for reducing White's upper right corner ends in gote for Black. Therefore, it cannot be played earlier in the game. | |

: : Please note that White will answer Black's atari at with in the | |

Liberties (in the marked area): - Black has ten direct liberties .
- White has two direct liberties .
- Both sides share one liberty .
In total, Black has a surplus of Please note that both sides will have to occupy the shared liberty in the temporary seki Consequences: - Black will survive the Punishment Semeai.
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Let's try to find out what KataGo thinks about this matter ... | |

: Please note that KataGo will have exchanged for in the temporary seki much earlier in the game, and not let it unplayed : ( KataGo favours Harry's Hasami-Tsuke , of course. : | |

: We manually enforced Fujisawa Hideyuki's Atari . Starting the endgame on the left side of the board with Fujisawa Hideyuki's Atari "late" For further details, please refer to section "Jérôme Hubert's Correction of the Mutual Occupation of Opponent's Liberties" ( 2041c). : : | |

: : White's previous move was played outside the Main Semeai Area, so Black gained one tempo in the Main Semeai. | |

: : ( KataGo favoured immediately capturing Black's single stone at the upper edge with , instead, which will benefit White by one point overall. | |

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: ( White could also attach at in the upper left centre for reaching the same result overall. However, she would be worse in the Semeai Variation, as Black would not invest additional stones in the Main Semeai Area. However, the subvariation will allow us a simple comparison with the historical line of play, in which the endgame on the left was started only after the resolving of the hanezeki. : | |

: : It would make no sense for Black to start a ko-fight with an own move at , since White will not give him any opportunity to continue capturing with . : : : Had KataGo not played its kikashi, the results of the two Main Variations would have swapped places. : | |

Black must not play any reduction. | |

Capture Variation: Compared to Our Solution (2015 / 2017), ... - White's cumulated gain in the upper left corner and at the top is two points.
- White got an additional four points of territory in the upper right corner.
- White's cumulated gain in the hanezeki is one point.
In total, Black lost seven points.
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Semeai Variation: Compared to Our Solution (2015 / 2017), ... - White's cumulated gain in the upper left corner and at the top is two points.
- White got an additional three points of territory in the upper right corner.
- White captured one Black stone less in the upper right, so losing two points.
- White's cumulated gain in the hanezeki is one point.
In total, Black lost four points.
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Let's go back again to the dawn of time ... | |

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: ( 2025) | |

: Please note that Black will For an analysis of White's connection at , please refer to the history of our research ...
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: : Please note that : : ( Decades later, the world of amateurs will come up with Harry's Hasami-Tsuke of , instead, which at least helps avert disaster. Provided this option is drawn : : | |

: : Please remember that White still has the kikashi of , at her disposal, to be utilised in the Semeai Variation. | |

Liberties (in the marked area): - Black has ten direct liberties .
- White has three direct liberties (2x + ).
- Both sides share one liberty .
In total, Black has a surplus of Please note that both sides will have to occupy the shared liberty in the temporary seki Consequences:
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Let's enter the world of amateurs and apply the knowledge gained there a few decades later ... | |

( 2025) For further details, please refer to section "Harry's Hasami-Tsuke Sequence" ( 2024) ( 2025) ( | |

: : : | |

: : ( Choosing the solid connection of , instead, will be mistaken here. | |

Liberties (in the marked area): - Black has ten direct liberties + 1 approach-move liberty = eleven effective liberties in total.
- White has three direct liberties .
- Both sides share one liberty .
In total, Black has a surplus of Consequences: - Black must not connect any of his hasami-tsuke stones.
- Black will be able to play at e.g. in the right centre, as White must capture around the upper edge first.
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Territory (in the Capture Variation): Compared to Fujisawa Hideyuki's solution, ... - White's cumulated gain at the upper edge is three points.
- Black destroyed one point of White's territory in the right centre.
- White did not capture Black's throw-in stone in the hanezeki, so losing one point.
- Black captured one White stone less in the hanezeki, so losing two points.
In total, Black lost three points.
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Territory (in the Semeai Variation): Compared to Fujisawa Hideyuki's solution, ... - Black's cumulated gain at the upper edge is one point.
- White did not capture Black's throw-in stone in the hanezeki, and did not get one point of territory there, so losing two points.
In total, Black gained three points.
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( 2025) | |

: ( 2025) | |

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: : | |

Liberties (in the marked area): - Black has nine direct liberties + 1 approach-move liberty = ten effective liberties in total.
- White has three direct liberties .
- Both sides share one liberty .
In total, Black has a surplus of Consequences: - White will choose, and win, the Punishment Semeai.
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Liberties (contd.): Please note that connecting any of the hasami-tsuke stones will not make a difference. - Black has nine direct liberties + 1 approach-move liberty = ten effective liberties in total.
- White has three direct liberties .
- Both sides share one liberty .
In total, Black has a surplus of Consequences: - White will choose, and win, the Punishment Semeai.
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Liberties (contd.): Please note that connecting any of the hasami-tsuke stones will not make a difference. - Black has ten direct liberties .
- White has three direct liberties .
- Both sides share one liberty .
In total, Black has a surplus of Consequences: - White will choose, and win, the Punishment Semeai.
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In the world of amateurs, Harry's Hasami-Tsuke Sequence usually appears in conjunction with my Guzumi ... | |

: ( 2025) : : : | |

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: In reality, White would be forced to start the endgame at the left side of the board with Yamada Shinji's Tsuke "early", see the explanation further below. | |

: Please remember that White has the kikashi of for in the Semeai Variation at her disposal. | |

Liberties (in the marked area): - Black has eight direct liberties + four approach-move liberties = twelve effective liberties in total.
- White has three direct liberties .
- Both sides share one liberty .
In total, Black has a surplus of Consequences: - Black is able to connect
**both**hasami-tsuke stones, at the cost of only one liberty effectively. - White must start the endgame at the left side of the board "early" (due to Black's
**ninth**surplus liberty that would Black enable to tenuki).
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Liberties (contd.): After the connection of his two hasami-tsuke stones, ... - Black has eight direct liberties + three approach-move liberties = eleven effective liberties in total.
- White has three direct liberties .
- Both sides share one liberty .
In total, Black has a surplus of Consequences: - Black will survive the Punishment Semeai.
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Capture Variation: Compared to Our Solution (2015 / 2017), ... - White did not capture Black's two throw-in stones in the hanezeki, so losing two points.
- Black captured two White stones less in the hanezeki, so losing four points.
In total, Black lost two points.
Please note that – compared to Our Solution (2015 / 2017) – the final scores of both MainVariations are identical here. However, KataGo's later improvements provide White with an additional gain of | |

Semeai Variation: Compared to Our Solution (2015 / 2017), ... - White did not capture two Black stones in the hanezeki, so losing two points.
- White capture one Black stone more in the right centre, so gaining two points.
In total, gains and losses compensate for each other.
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