The idiom "rake over the coals" means to subject something or someone to intense criticism, investigation, or scrutiny. It is often used when a person or thing is being closely examined or scrutinized for errors or wrongdoing.

The idiom "take turns" refers to the act of alternating or sharing something or doing an activity together with someone else. It can also mean taking turns in a decision-making process or in the order of events that unfold.

The idiom "blank check" refers to a document that authorizes the issuance of money without any restrictions or limitations.

The idiom "go by the book" means to follow the rules or regulations strictly, without any deviation or flexibility. It also suggests that someone is not only following the written text but is also interpreting it correctly and applying it in practice.

The idiom "when the chips are down" refers to a time or situation when things are serious, critical, or at their worst. It's often used to describe a point of no return, where all options have been exhausted and there's no turning back.