T-3 Reactors
Also written T3 Reactors · a T-3 game on zen2play
Four of a colour. Charge every reactor.
T-3 Reactors is a colour-sorting puzzle played worldwide, with our T3rminator™ as every piece. Move them one at a time between the reactors until each reactor in use holds four of one colour.
- Easy, Medium and Complex
- Every puzzle proven solvable
- Undo and Restart, always free
- Tap to play, on a phone or the web
A finished Easy rack from the game.
Three rules
Each reactor holds four T3rminators, closed on the left and open on the right. Exactly four of each colour are in play, and two reactors start empty.
Only the end one moves
A T3rminator leaves through the open right end, so only the rightmost one in a reactor can move — one at a time.
Onto its colour, or into an empty reactor
It may go to a reactor with room whose end T3rminator is the same colour, or to an empty reactor. Nowhere else.
Four of a colour everywhere
The puzzle is solved when every reactor is either empty or holds four T3rminators of one colour.
Playing
Tap a reactor to pick up its end T3rminator, then tap where it should go — the reactors that can take it light their arrows. A move that is not allowed just shakes. Undo takes a move back and Restart starts over, as often as you like. Show numbers puts a number on every colour.
Every puzzle can be finished
Our engine proved every puzzle solvable before it went into the game, and a second check confirmed the fewest moves. You can still paint yourself into a corner — the examples below show how to avoid it.
Thinking it through, with pictures
Each example is a 6-reactor rack, before and after one move, with an arrow for the move. The first three are puzzles from the game; Easy puzzles never have dead ends, so the last two come from racks the engine dealt for this page. Every example was checked by the T-3 Reactors engine.
Move by move, to the last reactor
An Easy puzzle from the game, solved in the fewest moves — a picture after every move.
Three levels
Easy and Medium
Easy has 4 colours in 6 reactors and no dead ends: any sensible play gets you there. Medium has 6 colours in 8 reactors and longer solves — plan a few moves ahead.
Complex
8 colours in 10 reactors, with real dead ends on the way: the moves you make early decide the finish. Undo is your friend.
Your time
Pick 15, 30 or 45 minutes. The clock starts with your first move.
Show hints, Show solution
A hint names one good move from wherever you are. The solution plays the shortest way from the start — but a shown puzzle does not count as solved.