The Story
Where it came from, and why it turned out this way.
OriginJava, Indonesia; named after the historic city of Surakarta
The name comes from a city
Surakarta is a traditional game of Java, Indonesia, named after the historic city of Surakarta in Central Java, also known as Solo. It was only systematically recorded by Western sources in the 20th century, so its age is genuinely unclear — a common situation with traditional folk games, where the play circulates for generations but nobody has any reason to write it down. It is sometimes simply called permainan, the Javanese word for a game.
A capture mechanism found almost nowhere else
Ordinary movement is unremarkable — one step to an adjacent intersection. What makes the game is capture: a piece must set off along a track, travel completely around one of the three-quarter loops at a corner, and take the first enemy piece it meets afterward. Having to go around before you can strike appears in essentially no other mainstream board game, and it converts the edge of the board from a boundary into a corridor.
Two circuits that never meet
The eight corner loops are not decorative. The four smaller loops link files B and E with ranks 2 and 5 into an inner circuit; the four larger ones link files C and D with ranks 3 and 4 into an outer circuit. The two circuits merely cross at board intersections, and a capture may not switch tracks mid-route. That makes "is this piece safe?" a precisely answerable question — check which circuit its file and its rank each belong to.
The opening has no captures at all
The starting formation is so dense that every track is blocked by one's own pieces, and neither side can capture anything. The first few moves are therefore just ordinary steps opening gaps — and every piece you shift may open a route for your opponent as well. That structure, where you must unlock the door before any fighting can start, gives Surakarta's first dozen moves a tension that is hard to find elsewhere.
- The four corner points A1, F1, A6, and F6 lie only on lines with no loop exit, so a piece there can neither be captured nor initiate a capture.
- Loops are paths, not destinations: a piece can never stop on one, and ordinary moves cannot enter them. A single capture may pass through several loops of the same circuit in succession.
- Traditional play resolves stalemates by agreement; this page adds threefold repetition, a 50-turn no-capture limit, and a no-legal-move clause so that solo games can end decisively.
Complete Rules
Start with what a turn allows and how the game is won.
- Board
- 6 × 6 intersections, 8 corner loops
- Pieces
- 12 discs per side, Red moves first
- Winning conditioncapture all twelve of your opponent's pieces and you win. Pieces have no ranks and there is no promotion — all of the game's technique is concentrated in how you capture.
- Pieces sit on the intersections of six horizontal and six vertical lines rather than inside squares. Red's twelve occupy rows 1 and 2 at the bottom, Black's twelve occupy rows 5 and 6 at the top, Red moves first, and each turn moves exactly one piece.
- Ordinary movestep exactly one point in any of the eight adjacent directions — horizontal, vertical, or diagonal — onto an empty intersection. Ordinary moves cannot capture and cannot borrow a corner loop to travel further.
- A capture must start along one of the four orthogonal directions — up, down, left, or right — never along a diagonal. The piece travels along that straight line, and when it reaches the board edge, if that line continues into a corner loop, it follows the loop tangentially back onto the board and keeps going.
- A legal capture must travel completely around at least one corner loop. Meeting an enemy along a straight line with no loop is not a capture: even with an enemy piece directly ahead on the same line, you may not simply move onto it, and you certainly may not jump over it to reach something behind.
- Every intersection the path passes after the starting point and before the target must be empty; neither your own pieces nor enemy pieces can be crossed. If the first piece encountered after the loop is one of your own, that direction is void as well.
- When the first piece encountered after the loop is an enemy, the moving player lands directly on that intersection and removes the enemy piece, ending the turn immediately. At most one piece is captured per turn, there are no chain captures, and capturing is never compulsory.
Your First Game
Use this order of thought to get through a complete game quickly.
- Keep the two kinds of movement separate in your head: diagonals are only for ordinary moves, captures can only start along ranks and files; ordinary moves always travel exactly one step, while a capture's distance is determined entirely by the track.
- When you select a piece, the interface marks ordinary destinations with solid dots and loop-capture destinations with loop markers, drawing the full route and direction arrows. Trace that line before committing and confirm that the first occupied intersection along it really is the piece you intend to take.
- Memorize which lines lead into loops: files B, C, D, E and ranks 2, 3, 4, 5 enter a corner loop when they reach the board edge, while the outermost files A and F and ranks 1 and 6 have no loop exit, so routes along those simply end at the edge.
- The opening formation is dense enough that neither side has any legal capture at all, so you must first open gaps with ordinary moves before the tracks come alive. That also means every piece you shift in the opening may open a route for your opponent as well.
- Capturing is optional. When a capture is available, first compare: where does my piece end up afterward, and does it land on the end of one of my opponent's clear tracks?
Practical Strategy
Move from knowing the rules to playing with a plan.
- The board holds two capture circuits that never connect. The inner circuit links the four smaller corner loops through files B and E and ranks 2 and 5; the outer circuit links the four larger loops through files C and D and ranks 3 and 4. To judge whether a piece is safe, check its file and its rank separately against these two circuits.
- Each intersection lies on exactly one file and one rank, so it can be threatened from at most two track directions. Placing a piece on a line with no loop exit eliminates one of those directions outright.
- The four corner points A1, F1, A6, and F6 lie only on lines without loop exits, so a piece there can neither be captured nor initiate a capture. That is useful when you need to preserve a piece, but it also removes the piece from the attack.
- Blocking is the most direct defense: a piece placed anywhere along the straight section before your opponent enters the corner loop voids the entire route. It does not matter whose piece it is — without completing the loop there is no capture.
- One piece may guard two lines at once, and it may equally block two of your own lines at once. Before repositioning it, think through both lines it will leave behind.
- Central pieces have the most freedom of ordinary movement, while pieces near loop entrances threaten the farthest. A good formation preserves both kinds of value.
- When ahead, watch the no-capture counter in the interface. Refusing to capture indefinitely turns a winning position into a draw.
Winning and Special Rules
Details that are easy to miss but can change the result.
- Each corner has both a larger and a smaller three-quarter loop, eight in total. Loops are paths, not destinations: a piece can never stop on a loop, and ordinary moves cannot enter one.
- The two circuits merely cross at board intersections; a capture may not turn from one to the other at a crossing point. Direction changes only through the tangential continuity of a corner loop.
- A single capture may pass through several loops of the same circuit in succession, and may pass again through intersections it has already vacated, including the moving piece's own starting point.
- When several legal tracks share the same start and destination, the rules treat them as one move, and the interface fixes one for the preview and animation by preferring fewer loops and a shorter route.
- The traditional rules resolve stalemates by mutual agreement. To let solo games end decisively, this site adds three digital adjudications: a third occurrence of the same board with the same side to move, 50 consecutive turns with no capture, and the side to move having no legal move are all draws.
- Red always moving first is this site's digital convention; the traditional rules leave the order to the players.
Common Mistakes
The traps new players fall into most often.
- Treating a straight-line encounter with no loop as a capture, or trying to launch a loop capture from a diagonal direction.
- Focusing on the target and overlooking a piece already blocking the route before the entrance, after the loop, or anywhere in between — any occupied intersection along the path voids the whole route.
- Treating the crossing points of the two circuits as junctions where you may freely change direction.
- Grabbing a capture and thereby parking your own piece at the far end of one of your opponent's clear tracks.
- Assuming the game only ends when one side is wiped out, and overlooking that threefold repetition and 50 moves without a capture end it in a draw.