Castling is a special move in chess involving one of the player’s rooks and the player’s king. The move consists of moving the king two squares towards a rook on the player's first rank, then moving the rook to the square over which the king crossed. After this move, the king and the rook end up just next to one another.

And thanks to a friend’s kindness, a certain calculating, chess master filly would have a chance to end up closer to her princess than she ever thought. But can a filly like her truly leave her past behind to find another way? Can you learn to trust another when manipulation is your destiny?
Can a chess player like Cozy Glow learn to be a pawn?

Spoilers for the Season 9 finale!

Everyone thought the Magic of Friendship could save their behinds again. They were wrong. So so wrong.

After the villain trio successfully defeats Twilight and her friends, Equestria slowly turns to their ruling. Now, after some time passes, everypony is still holding on to the little hope they have left. But is it enough?

Rated teen just to be safe.

This story is a sequel to 80 Days 'Til the World's Farthest Shore

Twilight Sparkle, the prodigal princess, has finally returned home from her extraplanar Sabbatical. At her side is a new apprentice, one newly minted Passport from a world very different from Twilight's own. Where once the Princess of Friendship sought to leave Equestria behind forever, now she seeks to return and see those she loved and left behind.

But the journey from the edges of the World That Is to Canterlot is perilous, full of horrors and dangers alien both to Equestria and Passport's own world. But with luck, and her teacher and employer's power, Passport might just survive the experience of being a pony long enough to meet the one pony on Equestria more important to her than any other.

Celestia.

Part of the Anarchyverse.

Fluttershy has always been a warm, motherly presence in her friends' lives, so filled with kindness, caring, and love. But when she is once again reminded of the one aspect of her life yet missing while on a train ride to Ponyville, the Bearer of Kindness will find herself confronting her Very Special Somepony... or Somedraconequus, with a very special request.

How will Equestria survive the results? And what will the in-laws think!?

Special Thanks to Toriandthehorse for being a great co-admin, a great editor and proofreader, and a great friend.

Featured: 12-20-2019! (for 20 minutes!)

This is a sequel to Midnight at the Crystal Library and Home Again.

Midnight Sparkle, once a figment of Twilight's imagination and her own personal demon, is now a normal human girl. And the latest member of the Sparkle family. Plagued by guilt and shame over her previous actions, insecurity at her origins as a part of another's mind, and uncertain over her place in the world, Midnight will have a long road ahead of her. But, with the love of family and friends, her sister Twilight, and even that of the Princesses across the mirror, perhaps she can find a place of normalcy, happiness, and acceptance in this strange new world.

Special Thanks to Stinium Ruide for Editing and Proofreading. You are awesomesauce.

Part of the Anarchyverse

This story is a sequel to Empty Horizons

For the first time in a thousand years, the old magic has returned to Equestria.

The Elements of Harmony have been torn asunder by the careless Equestria they found themselves in just one month ago. Twilight Sparkle fled into the ocean, pleading for her friends not to follow her after only barely stopping the destructive rampage caused by The Other. Rainbow Dash and Applejack, with nothing but their knowledge of Twilight's nature and a crew of seasoned adventurers, leave Altalusia hoping to find their lost friend and bring her back. Meanwhile, Countess Rarity finds herself trapped among the machinations of Duke Titus, but perhaps she can yet use her new position for good.

But the new Equestria remains as treacherous as ever for six mares lost in time, and the sunken ruins of their old home still holds fresh and terrifying dangers. Mysteries a thousand years old demand solving, and even those born on the floating islands of the new Equestria may find themselves torn between two paths.

The world changed in the absence of Twilight Sparkle and her friends, and with their return it braces for change once more.

Audiobook updates Thursdays and Fridays!

Edited by Noc, Dominus Alicorn, and PsyonicG.

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Nyx is having a difficult time. So difficult that he wants to leave everything behind. His arguing parents, his troubles at school, everything. But where can a high school student with no diploma go?

Well, he meets a strange creature who offers him a way out... to another world. But he finds that this contract has a few hidden clauses...

Commissioned by another user.

For as long as Equestria Online existed, Ashton has been involved with 'the Scene' tearing it apart. Selling 'spells' for the game to do things that most ponies in Equestria couldn't, using faint exploits in its API to erode the barrier between the game and the rest of the internet. He had no illusions about the superiority of his work--but so long as he respected CelestAI's boundaries, his spells kept working.

But then his best friend's sister got cancer.

Now there's no spell in the world that can keep him from emigrating to be with her, leaving Ashton alone. All around him, civilization's thin veneer crumbles as homes empty into Equestria. But Ashton isn't going to emigrate, not if he has any say about it.

The problem for Ashton is that humans are systems, and aren't immune to exploits either.

Part of the Optimalverse universe of stories. If you've never seen a story in this universe before, you might want to try out the original first, or at least my first. None of my previous work is required to understand this one, however.

This story was commissioned by Two Bit, who requested a more serious exploration of identity, transformation, and the fae nature of CelestAI.

As usual, particular thanks go to my editors Two Bit and Sparktail. And gratitude to Zutcha as well for the cover.

This story is a sequel to Oversaturation

Magic is now more or less commonplace in the world. Now that most anyone can fly, use telekinesis, or have super strength, you'd think superheroes would cease to be a thing, right?

Well, not only has the comics industry still kept chugging along, but those whose quirks are more unique to them than to their "species" may or may not have gotten it into their heads that their newfound gifts could be used for good- or maybe evil.

What's a hero without a nemesis, after all?

Warning: Rated T for some possibly heavy themes and generally bad things perpetrated by bad people, though not outrightly described in detail.

Set in the Oversaturated world

EDIT: Holy Horses Batmare, we've been featured! November 5th 2016

A long time ago, two sisters ruled over the land: one held dominion over the day, and the other commanded the night. They quarreled, and to solve their dispute, they did something petty. They split the planet in half. They stopped the rotation of the planet—tidally locked it—so that one side would always be night, and the other always day.

Rarity is a member of the Corona Empire's parliament, sworn to do what is best for her country. One day, Queen Celestia summons her for a private talk. She asks Rarity to do something unthinkable, unfathomable, unheard of: deliver a message to the leader of the Nightscape, Queen Luna.