Comet Barn

Guide

Sinkroll guide: matching dice, chains and Happy Ones

Comet Barn · · 6 min read · Sinkroll: Dice Puzzle

3 touching teal dice showing 3 sink together as another matching die rolls toward them.

In Sinkroll, connect at least N dice showing N on top: 2 touching 2s, 3 touching 3s, up to 6 touching 6s. They begin sinking. You then have 1 more roll to feed a matching die into the group and extend its chain. A 1 rolled against sinking dice triggers a Happy One, clearing all the 1s on the board.

The chain window is measured in rolls, not a countdown that forces you to react quickly. Think through the follow-up move before spending it.

What counts as a matching group?

A match is a connected group of the same top value, joined along the board’s horizontal or vertical edges. Diagonal contact alone does not connect dice.

Top value Minimum connected dice needed
2 2
3 3
4 4
5 5
6 6
1 Special Happy One rule; not an ordinary 1-die match

“At least” matters: a connected group can be larger than its minimum. Look for the whole connected group, not only a straight line. An L-shaped group can qualify because its cells are still connected edge to edge.

For example, 3 dice showing 3 in an L shape form a match. The same 3 dice placed only diagonally do not. A pair of 3s is also insufficient until another 3 joins the connected group.

Rolling changes the face on top

The board is 7×7. Moving a die rolls it onto the next cell, changing which face is on top. You are arranging orientations as well as positions.

Suppose a die already shows 3 but sits beside a group you want to complete. Moving it does not preserve that 3 automatically: the arriving face depends on its orientation and roll direction. Use the move preview rather than treating the die like a fixed tile you can slide into place.

A gold preview indicates that the proposed roll will score. For a beginner, this gives you a useful question before each move: am I completing a group, extending a chain, triggering a Happy One or just preparing a future move?

Sinkroll board showing a group of sinking 4s and the Chain x2 score message.

An actual Sinkroll chain. The matching value and the dice’s contact matter; a nearby die with the wrong arriving face will not extend the group.

How chains work, step by step

First make a qualifying group. It begins sinking at chain ×1. Before taking your next roll, look for an unsunk die that can arrive beside that group showing the same value.

If the next roll brings a matching die into contact, it joins the sinking group and increases the chain multiplier. The group remains available for another roll, so you can look for the next extension. If a roll does not refresh that group, the group disappears.

For a simple example, make a connected group of 3s. On the next roll, bring another die alongside it with 3 on top. That creates a ×2 chain. If you then spend a roll elsewhere without extending it, you cannot expect the old 3s to remain available for a later rescue.

You can pause to plan before rolling. The animation is not an instruction to tap faster. The valuable resource is the next move.

What does a Happy One do?

Roll a die so it lands showing 1 beside sinking dice. That triggers a Happy One and sinks every unsunk 1 on the board, including 1s that are not connected to the triggering die.

A lone 1 on an otherwise ordinary square does not clear itself. It needs the contact with a sinking group. The group does not have to consist of 1s—the point is to roll the 1 against dice that are already sinking.

This can make a 1 useful as a follow-up even when it cannot extend the current group’s matching value. Check whether you have a matching-die extension or a Happy One available before using the next roll somewhere unrelated.

Understand the score before chasing large faces

For a newly matched group, the base award is the top value × the number of dice × 10. A group of 3 dice showing 3 therefore starts with 90 points. A larger group of 4 dice showing 3 starts with 120.

When a die joins an existing sinking group, its chain award uses the group’s value × 10 × the new chain multiplier. For example, a die joining a 3-group at ×2 adds 60 points. Other groups or effects on the same roll can contribute more, so the total pop-up can be larger than that single addition.

A 6 is not automatically the best immediate target: it needs more matching dice and may take more preparation. In a crowded board, a reachable small match that opens space can be more useful than chasing a distant large group.

Choose the right mode for learning

Puzzle levels: there are 24 authored levels with defined goals, roll limits and par targets. Read the goal: a chain objective and a score objective ask for different plans. Undo is available in eligible puzzle levels; it is not a universal way to rewind daily or endless play.

Daily board: everyone gets the same daily starting challenge. Watch how your moves affect the available space instead of expecting it to behave like a fixed puzzle with one scripted answer.

Endless mode: new dice arrive as you roll, so space management becomes part of the challenge. Opening cells and preserving routes for useful rolls matter alongside the next score.

A repeatable plan before each roll

  1. Check whether a sinking group needs its follow-up now.
  2. Look for a matching extension or a Happy One.
  3. If no group needs attention, find a nearly complete connected group.
  4. Inspect the arriving face of the die you want to move.
  5. Check what space the move opens and what space it uses.
  6. Make the roll, then reassess the changed board.

Hints can help when you cannot find a useful move. Study the suggested roll’s purpose: it may score immediately or prepare a group. In puzzle levels, use an available undo to compare your prediction with the result.

Common mistakes

Counting diagonal neighbours. Only horizontal and vertical connections join a normal group.

Moving a 4 as though it stays a 4. Rotation changes the top face. Check the preview at the destination.

Spending the chain’s next roll elsewhere. A sinking group needs a qualifying extension to stay available.

Expecting 1s to match by themselves. Trigger a Happy One beside sinking dice.

Play Sinkroll. It is free in your browser, with no ads or sign-up. The game page has screenshots and the full feature summary.

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