About Knight Shift

Chess training made from your own games.

Knight Shift is made by Get Off My Lawn Developers, LLC, a small studio in Alabama that makes its own games and apps. It began as its founder Troy Corbin's own training tool, and grew into Blunderbuss: a drill any player can use on the blunders in their own games.

Troy Corbin Get Off My Lawn Developers, LLC

Why I built it

I'm Troy Corbin. I play over-the-board tournaments in Huntsville, Alabama, and I've played thousands of games on chess.com and Lichess.

In October 2026, getting ready for one of those tournaments, I went through my games to see what was costing me. Game after game, it came down to one bad move: a piece left hanging, a fork I didn't see. I was making more than one of those a game, and that hadn't changed in a year.

So I wrote a program that brought in my games, had Stockfish find those moves, and drilled me on each one until I found the right move. When a position from one of my own games came up, I remembered the game: who I was playing, and the moment it went wrong. I believe that's why the lessons stuck.

Knight Shift is that program, built for every player. Blunderbuss, its drill, uses only your own games, for the same reason.

Chess software isn't new to me. In 2001 and 2002 I wrote Knights, an open-source chess program for the KDE desktop on Linux. It's still maintained today, as part of the Trinity Desktop.

Troy Corbin

How we got here

2001–2002
Knights

Troy Corbin writes Knights, an open-source chess program for the KDE desktop on Linux.
October 2026
A drill for one player

Getting ready for a tournament in Huntsville, Troy Corbin writes a program that finds the blunders in a player's own games and drills them.
November 2026
Knight Shift

The program becomes Knight Shift, built for every player, and Get Off My Lawn Developers, LLC is registered in Alabama to run it.

What we make

Knight Shift is chess training for amateur players, made from their own games. You bring in your games from chess.com, Lichess or your tournament scoresheets, and Stockfish, the chess engine, checks every move.

Blunderbuss turns each blunder into a drill: find the move you missed. Get it right and it comes back in a day, then three, then a week. Miss it and a lesson plays the idea out on the board, one move at a time.

It's free to start, with your 20 most recent blunders and a new game every day. Plus, at $6.99 a month or $39 a year, turns every game you've played into drills.

How it works Knight Shift Plus

What we promise

Only your own games

Every drill is a position from a game you played, with your opponent, the date and the event. No random puzzles.

Your name stays off your blunders

Once your name is on your account, nobody else can look up your blunders. If one is ever shown to other players, it carries no names.

Your data is yours

Download everything we hold about you, or delete your account, whenever you like.

No ads

Knight Shift is paid for by the players who choose Plus, not by advertisers. We never sell your data.

The company

Get Off My Lawn Developers, LLC

Get Off My Lawn Developers, LLC is a small, independent studio that makes its own games and apps, registered in Alabama in November 2026. Troy Corbin founded it, and it builds and runs Knight Shift.

It's also making Angular Velocity, a 3D space-combat sandbox: mine asteroids, craft ship parts, build your own ships and bases, and fight, alone or with friends. It's in closed testing now, on its way to itch.io and Steam.

Questions, ideas or trouble with your account? Write to us at [email protected].

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