Looking for BBCverse TGG fic

[lady-carfax.livejournal.com]

I have vague memories of a fic based on a different version of TGG where Moriarty makes John say things that play on Sherlock's attraction to John. It is set at the pool and I have images of Sherlock getting unwillingly turned on by what John is saying.  It was a little angsty (or possibly a lot).  I've searched the delicious archive to no avail, but I wouldn't be surprised if it was on the BBC meme.

Any help would be adored; apologies that my descriptions are so lacking.

ETA: Found Ludus Latrunculorum by phantomreviewer Thankyou!