Surakarta Unblocked
Captures only count after a lap around the loops, so danger comes from the side you are not watching.
What is Surakarta?
Surakarta is a two-player capture game from Java played on a 6x6 board whose corners carry curved circuits. Each side has 12 stones. You either step one stone to a neighboring point or slide it along a loop line to capture, and you win by taking all enemy stones or leaving them without a move.
- Category
- Strategy Games
- Players
- 1–2+ players (same screen)
- Plays on
- Phone, tablet & desktop
- Input
- Mouse, Touch, Keyboard
- Made by
- Christopher Müller
- Checked
Surakarta has the strangest capture rule of any board game on FreezeNova. Stones do not take pieces by moving next to them or jumping over them. Instead, a stone must travel along one of the board’s long lines, swing around a curved track at a corner and come back in from another direction to strike. That means the real danger often comes from the side of the board you were not watching. The game takes its name from a city in central Java, and this unblocked edition, part of the PaperGames set by Christopher Müller, keeps the rules lean.
The Board and a Turn
The playing area is a 6x6 grid of points. Each corner has a curved arc that links one inner row to one inner column, forming loop tracks around the edges. Both sides fill the two rows closest to them with 12 stones. Black opens.
On your turn, choose one of two actions:
- Step. Move a single stone to any free adjacent point, including diagonals. Steps never capture.
- Loop slide. Push a stone along one of the four inner loop lines. When it runs out of board, the corner arc bends it onto the connected line and the journey continues. After at least one trip through an arc, the slide ends on the first opposing stone in its way, which is removed.
In this version, stones in the path are skipped over rather than blocking the slide. When you select a stone, the board lights up every capture it can make, which helps a lot while you learn the tracks.
Captures are optional. You win by removing every enemy stone or by leaving your opponent with no legal move. A counter tracks stones taken by each side.
Surakarta controls
| To do this | Keyboard | Mouse | Touch |
|---|---|---|---|
| Step one stone | Arrow keys and Enter to pick the stone, then the empty point | Click your stone, then an empty neighboring point | Tap your stone, then an empty neighboring point |
| Capture by riding a loop | — | Click your stone, then the highlighted enemy stone it can reach | Tap your stone, then the highlighted enemy stone it can reach |
| Start a match with the computer | — | Click "vs Computer", pick black or white and a level, then click "New game" | Tap "vs Computer", pick black or white and a level, then tap "New game" |
| Undo a move | — | Click "Undo" | Tap "Undo" |
Thinking Around Corners
Know which lines are live. Just four lines touch the arcs: the inner rows and columns one step in from each edge. A stone on any of those four lines may be hit from around a corner. A stone off them is safe from captures.
Retreat to quiet lines. If one of your stones is threatened, stepping it onto a row or column that no arc touches removes the danger.
Look before stepping onto a loop line. A harmless-looking step can line a stone up for an enemy slide. Check the threats from every arc before you commit.
Strike first in a standoff. When both players have captures available, moving first often wins the trade outright.
Practice with Undo. Rewinding and replaying the same position is the quickest way to train your eye on how the arcs connect.
Who Will Enjoy It
Surakarta suits players who like a fresh puzzle: the rules are short, but the geometry takes a few games to see. Three AI strengths and automatic saving of an unfinished match make practice painless. For another traditional game from Asia, try Bagh-Chal, or explore other unusual rule sets in card and board games.
Surakarta: questions players ask
Where does Surakarta come from?
It is named after Surakarta, a city on the Indonesian island of Java. This page plays a simplified version of the traditional game with one loop per corner, which keeps the rules approachable for new players.
Why can my stone not capture the piece right next to it?
Adjacent captures do not exist in Surakarta. A plain step only moves a stone, never takes one. To capture you have to send a stone along a loop line and around at least one corner arc first.
Is it a problem if stones sit on the loop track?
Not for the attacker in this version. A capturing stone skips over anything on its route until it has passed a corner arc, then takes the first enemy it meets. Traditional sets have a pair of arcs at each corner and demand an unobstructed route, which makes this edition more open.
Do I have to capture if I can?
No. Captures are always optional here, so a quiet step is legal even when a capture is available. Sometimes waiting sets up a stronger shot next turn.
Credits and license
Surakarta was created by Christopher Müller and released as open source. FreezeNova hosts a lightly adapted copy on its own server, together with the original license file.
- Source code: github.com/YourChaosChris (original project)
- Code license: MIT
- Art & audio: MIT (board, loop arcs and stones drawn with SVG and CSS, no image or audio files)
- Our changes: Just this game was taken from the PaperGames set and shown in English. We removed its service worker, its language picker and links to the set's other games and pages. Rules and AI are as the author wrote them.