Joachim's Ko-Semeai - Putting the Cart
Before the Horse (2013 - 2015)
8c - Smaller Eye in the Centre
( 988) Now, we will transform the starting position to one with a smaller eye for Black's group. We will assume that neither nor have been played. |
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Instead, we assume the exchange of / in the centre. Black's group has a smaller eye now. The conditions concerning the liberty count are as with the larger eye, five liberties for White (2 * w, 3 * c), and seven liberties for Black (3 * c, 3 * b, k). However - due to the missing larger eye - Black was below the Punishment Semeai Liberty Level, even before White captured the ko. Therefore, we will take / off the board. Black has one ko-threat in the hanezeki. |
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: This result is two external ko-threat worse than with a larger eye, or with smaller eye, but with an additional, and shared, ko in the centre. |
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