Here are my entries:
Hive: https://peakd.com/hive-13323/@oivas/splinterlands-or-opportunity-rule-or-only-ranged-attackers
Solcial: https://solcial.io/@oivas/post/299965-splinterlands-opportunity
Medium: https://medium.com/p/26ab32223842
Read.cash: https://read.cash/@AbunEnt/splinterlands-opportunity-rule-only-ranged-attackers-f246ce39