Movement of pieces is similar to that of traditional chess. The main difference is that, in the course of a move, pieces may move up or down any number of levels.
That year, his foster sister, Michael Burnham, brought a three-dimensional chess set out of storage in her quarters while Spock was visiting her there. Although he was initially somewhat puzzled by the gesture because he didn't know how it could aid him in attempting to contemplate the Red Angel, Burnham suggested that the game might help Spock consider the Red Angel logically, since the game itself represented logic. Accusing Spock of being frightened of losing, Burnham challenged him to a game, which he then accepted. However, Spock proceeded to play a series of moves that Burnham was baffled by and considered illogical, though he executed them in an effort to defy her expectations. When their conflict verbally and emotionally escalated, Spock struck the chess board with his right hand, causing it and the pieces still on the board to fall to the floor in disarray. (DIS: "Project Daedalus") The pieces and board were later sorted back into place and Spock subsequently invited Burnham to make the first move of a new game between them, which she proceeded to act on. (DIS: "Perpetual Infinity")
In general, Spock was an exceptional chess player, and his game was consistently logical. However, he often had a difficult time predicting or effectively responding to unexpected moves made by his frequent opponents, Captain Kirk and Doctor McCoy. (TOS: "Where No Man Has Gone Before", "Court Martial", et al.)
Spock also enjoyed playing chess against a rival logical mind, that of the Enterprise computer. In 2266, he detected programming errors in the computer's databanks because of faulty chess moves made by the computer. He later introduced the tampering and unreliability of the computer's records as defense evidence in the court martial of Captain Kirk. (TOS: "Court Martial")
Later that year, Kirk and his senior officers used a chess-based code as transporter clearance, when Garth of Izar planned to escape from the Elba II insane asylum. Chief engineer Scott declined to beam Garth, disguised as Kirk, to the Enterprise, when, after he challenged Garth with the code phrase "queen to queen's level 3", Garth could not respond with the correct pass phrase (which Spock revealed as "queen to king's level 1" when he called for transport back to the Enterprise). (TOS: "Whom Gods Destroy")
In 2366, Commander William T. Riker defeated both Ferengi Doctor Farek and a Ferengi guard at a presumably alien variant of 3D chess. The former defeat was in Ten Forward, and the latter took place while Riker was a captive of the Ferengi, along with both Counselor Deanna Troi and her mother, Lwaxana Troi. (TNG: "Ménage à Troi")
Reginald Barclay analyzed a chess game after being altered by the Cytherians. He made a move that would force checkmate within nine moves, despite not having previously been a player of the game. (TNG: "The Nth Degree")
Two years later, Counselor Troi managed to beat Lieutenant Commander Data at a game of 3D chess in Ten Forward, prompting Data to honor a bet they had agreed upon, whereby Data was to make Troi a Samarian sunset in the "traditional style." (TNG: "Conundrum")
Commander Benjamin Sisko, also a fan of the game, kept a three-dimensional chess set in his quarters aboard Deep Space 9. (DS9: "Move Along Home", "The Nagus", "The Maquis, Part I", "Statistical Probabilities")
In 2399, residents of Coppelius Station played three-dimensional chess. Also, a single board and pieces were seen on a tabletop in Jean-Luc Picard's quarters at the station. (PIC: "Et in Arcadia Ego, Part 1")
- "Too Short a Season"
- "When The Bough Breaks"
- "Coming of Age"
- "The Neutral Zone"
- "The Schizoid Man"
- "Unnatural Selection"
- "Pen Pals"
- "Booby Trap"
- "The Price"
- "Ménage à Troi"
- "The Best of Both Worlds"
- "Suddenly Human"
- "Galaxy's Child"
- "The Nth Degree"
- "Lower Decks"
- PIC: "Et in Arcadia Ego, Part 1"
- LD: "Strange Energies"
- Space Checkers (aka Three-dimensional checkers)
The Noble Collection later released a larger sized TOS tridimensional chess set.
A call sheet from the episode "The Schizoid Man", dated 4 November 1988, listed three-dimensional chess as one of the required items from the art department in the special instructions section. Here, it was referred to as "Okuda chess set".
The novel Tunnel Through the Stars describes a famous 3D chess player named Durania, for whom the classic Duranian Defense is named. He once played a famous game in which his opponent mistook his retreat (the Duranian Defense) for an attack, and broke off their relentless offensive in order to castle with the rook. This moment of hesitation allowed the opponent to get the momentum. The game went on for another four days, but Durania's opponent eventually lost.
The novelization of Star Trek makes a quick – and foreshadowing – reference; as the two fight their way through the Narada (largely a fistfight rather than the gun battle seen in the film), Kirk, marveling at Spock's highly effective use of Suus Mahna (thinking to himself, "he even fights logically"), concluded, correctly, that the Vulcan must play a "mean game" of 3-D chess.
A game of three-dimensional chess figures in the first appearance of Kirk and Spock in the 2013 video game Star Trek, when their game play is interrupted by a distress call coming from the Helios station, just after the captain's tactical error is exploited by the Vulcan. After Spock leaves his quarters, Kirk sneaks back into the room and moves the Vulcan's piece surreptitiously. This version is somewhat different in that the attack board may be suspended below the main board.
At the end of the the Star Trek: Ongoing story arc The Q Gambit, Kirk and Spock discuss whether or not the future that Q showed them will come to pass and whether or not they will see the omnipotent being again before deciding to play a round of three-dimensional chess.
- Three-dimensional chess at Memory Beta, the wiki for licensed Star Trek works
- Three-dimensional chess at Wikipedia
- Tri Dimensional Chess at BoardGameGeek
- How to play Tri Dimensional Chess at The World Tri Dimensional Chess Federation
- Tournament rules for Tri Dimensional Chess
- Star Trek 3D Chess at Chess Variants
- Kobayashi Maru Variant at Chess Variants
- Parmen, the free Three Dimensional Chess software