About Ko in a Semeai Between
Two One-Eyed Groups (2012)
(Referenced by 190; 227; 818; 937) This chapter explains the theoretical foundations of a special type of semeai, which arises in Joachim Meinhardt's idea ( 219) to prevent White's large endgame in the upper left corner. Please understand this chapter to be supplementary only now; probably it might be still useful for readers with a more mathematical approach. It was written before our intense work on "Putting the Cart Before the Horse" ( 937) - using the method of reverse engineering, instead - which shows our up-to-date results. We ask for your kind understanding that we still shied the effort synchronising both chapters. However, it has always been found to be advantageous to illuminate a situation from several directions. Mismatches were always quite helpful suggestions for further intensive studies. | A Special Type of Semeai | 1134 |
The Simple Version - No Hanezeki | 1135 |
Larger Eyes | 1140 |
A Second Ko-Shape for White | 1141 |
[ Second Ko-Shape for White & Larger Eye for Black ] | 1142 |
A Second, and Shared, Ko-Shape | 1144 |
[ Shared Ko-Shape & Outside Ko for White ] | 1146 |
The Effect of the Hanezeki | 1148 |
Effective liberties | 1149 |
Number of Ko-threats | 1151 |
White's False Eyes | 1152 |
[ Larger Eye for Black ] | 1153 |
[ Shared Ko-Shape in the Centre ] | 1157 |
The Semeai with Black's Group in the Lower Right | 1160 |
[ Black's Effective Liberties ] | 1161 |
[ Impact on the Main Ko-Semeai ] | 1162 |
[ The Construction Process Makes the Difference ] | 1164 |
White's Group on the Left Edge | 1166 |
Conclusion | 1167 |