Intriguing Covering Situations

Every so often I come across a covering situation where the cards are so delicately interwoven that one has to stop to determine what should be covered with what if anything, and where reasoning in the normal time available at the bridge table isn't likely to suffice looking at only two hands . I find these to be intriguing layouts. So this page isn't geared toward any lessons, any cases where one cay say, Look, can't you see that the cover is necessary, or declining the cover is necessary. Rather it's more of a pleasantry for those who'd like to take a look at them.
I hope the reader comes away with a sense of how delicately balanced a covering situation might be and recognize that this topic isn't just for novices and intermediates. Indeed, I'd like to hope some readers will agree with the that this is one of the most underrated and underwritten topics in bridge.
Below are links to some examples:

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