Joachim's Ko-Semeai - Putting the Cart
Before the Horse (2013 - 2015)
6 - No Black Throw-in in the Centre
with Move 85
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( (Referenced by Let us assume that Black did not play the central throw-in at White would not have captured at |
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Both groups gained a shared liberty. White's centre group has six liberties now (2 * w, 4 * c), Black's group in the upper right has eight liberties (4 * c, 3 * b, k). The Punishment Semeai Liberty Level is seven, so White captured the ko a bit too early. |
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We added Please note that we cannot use a shared liberty like |
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983
292
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, and thereafter filled-in at 

, for mutual adjustment of the liberty count. As usual with the main line with larger Black eye, White has five liberties, and Black has seven liberties.
for this adjustment, instead. With only six liberties for his top right group left, Black would be too far below the Punishment Semeai Liberty Level. In principle, Black has lost his flexibility to choose between the occupation of an outside White liberty, or a shared one. This will cost him one additional ko-threat for compensation, as we will see.
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as a ko-threat, because White's centre group has four liberties left. He needs an external ko-threat, instead.
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, in time.
