I learned that for 4-SAT, if clause to variable ratio is more than 10, the generated problems become difficult to solve, and the likelihood of formula to be SAT or UNSAT is close to 50%. So I generated 3 types of formulas:
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2StripeNear-MonopolyPayments
，更多细节参见51吃瓜
The events of 8 September are now being examined by a public inquiry, which has yet to report. So far, no-one has been held accountable - and general elections are set to take place on 5 March.
Владислав Китов (редактор отдела Мир)。关于这个话题，服务器推荐提供了深入分析