THE ROBOT END-PLAYS ITSELF.

The term "end-play" refers to putting the defenders in the bridge equivalent of Zugzwang, where any card the defender with the lead puts down loses.  The logic of doing so is to get rid of favorable cards whilst holding enough trump cards so as to have a response to any unfavorable cards outstanding.

There's not much interesting in this diagram apart from an instructive error that the "West" bot made.

Strange auction, West has a long Heart suit, and East doesn't have much.  Three No Trump might be living dangerously, but what the heck, there's no money at stake.  West opens with the ❤ King.  Take stock: two Spade winners and some length, but getting the lead back will be risky.  One Heart winner, and better not to let either side start leading Hearts.  Two Diamond winners, and two Club winners plus some length on the board.  How, then, produce the other two winners?

I cashed the ❤ Ace, then the two Diamonds.  Now the ♣ King followed by the ♣3.  I doubt that a human player would cover that with the Queen, with the Ace visible on the board.  But the West bot did, and now the ♣ Jack and Ten are both good, with the two Spade winners being enough to make the contract.  But West discarded the ♠2 rather than a Heart on the ♣ Ten, and there's the self-endplay.  Lead the ♠4 from the board to the King, the ♠ Ace now forces out the Queen, and now the remaining three Spades are good. I had pitched one Heart during the run of the Clubs, and had one left for charity.

Don't expect that many gifts from a human opponent!