Sins of the Father — Kakurasu Puzzle Solver

This page provides an interactive Kakurasu solver tailored for the Sins of the Father quest in Old School RuneScape. Kakurasu is a mathematical logic puzzle where you shade cells so the sums at the ends of rows and columns match; rows use column indices (1..n) and columns use row indices (1..n).

How to use this tool:

  1. Observe the in-game puzzle and write down the numbers to the right of each row and below each column.
  2. Choose the grid size in the solver (commonly 5×5 for the Sins puzzle) and enter the row sums and column sums.
  3. Click Solve. The solver enumerates valid shaded-cell configurations. If multiple valid solutions exist, the tool shows all of them so you can visually match the one from the game.
  4. Use Export to download the solutions as JSON for sharing or later import.

Tips:

  • If a number in-game is hard to read, leave that field blank and provide the remaining known values — the solver will search for matches that satisfy the given subset.
  • Start with smaller grid sizes if you're unsure — incorrect size choices will return no solutions, which is a useful hint.
  • When multiple solutions are returned, visually compare them with the in-game grid to pick the correct pattern; sometimes non-arithmetic visual constraints or game-specific hints disambiguate solutions.
Interactive Kakurasu solver

This tool mirrors how the in-game puzzle scores rows and columns (rows use column indices, columns use row indices). The solver uses a fast backtracking algorithm with precomputed row masks and column pruning for responsiveness.

Puzzle Controls
Enter Row and Column Sums

Enter the numbers you see to the right of each row and below each column in the in-game puzzle. Leave fields blank for unknown values.

1
2
3
4
5
Row Sum
1
2
3
4
5
Col Sum

Sins of the Father Quest Guide

📋Quest Requirements

Skills:

  • • 62 Mining
  • • 60 Strength
  • • 52 Fishing
  • • 50 Smithing
  • • 45 Prayer
  • • 43 Woodcutting

Quests:

  • • The Restless Ghost
  • • Priest in Peril
  • • Nature Spirit
  • • The Lost Tribe
  • • Bone Voyage
  • • Making Friends with My Arm

Items:

  • • Hammer
  • • Chisel
  • • 2x Rope
  • • Small fishing net
  • • 5x Willow logs
  • • Tinderbox
  • • 23+ Prayer potions (recommended)
🎁Quest Rewards

Experience:

  • • 20,000 Mining XP
  • • 15,000 Strength XP
  • • 10,000 Fishing XP
  • • 10,000 Smithing XP
  • • 10,000 Prayer XP
  • • 10,000 Woodcutting XP

Items:

  • • 2x Antique lamps (15k XP each)
  • • Ability to mine granite in the Desert Quarry
  • • Access to the Kharidian Desert resource dungeon

Other:

  • • 1 Quest point
  • • Access to the Underground Pass
🗺️Step-by-Step Walkthrough
1

Start the Quest

Talk to Vic the trader in the Desert Mining Camp. He'll give you a star map and ask you to find the location of the diamonds.

2

Mine Granite

Mine 5 granite rocks in the quarry north of the camp. Use your chisel on the granite to get 5 granite (5kg) pieces.

3

Smith Granite Items

Smith the granite at the furnace in the camp to make granite (5kg) items. You'll need 5 of these for the next step.

4

Fish for Trout

Fish 5 trout at the fishing spot south of the camp using your small fishing net.

5

Cut Willow Logs

Cut 5 willow logs from the willow trees near the fishing spot.

6

Enter the Underground Pass

Use a rope on the well north of the camp to enter the Underground Pass. Navigate through the pass, using your light source and prayer potions.

7

Solve the Kakurasu Puzzle

In the final chamber, you'll encounter the Kakurasu puzzle. Use the solver above to find the correct pattern to shade the cells.

8

Complete the Quest

After solving the puzzle, speak with Vic to complete the quest and receive your rewards.

💡Tips & Tricks

Preparation:

  • • Bring plenty of prayer potions (23+) for the Underground Pass
  • • Use the desert amulet for teleportation
  • • Bring a light source (lantern/oil)
  • • Use weight-reducing gear to carry more supplies

Underground Pass:

  • • Keep prayer on at all times
  • • Use the agility shortcuts to save time
  • • The pass has multiple paths - follow the main route
  • • Watch for poison spiders and aggressive monsters

Puzzle Solving:

  • • Take clear screenshots of the puzzle
  • • Double-check row vs column number entry
  • • If multiple solutions appear, look for visual clues
  • • Use the solver's export feature to save progress
⚠️Common Mistakes

Preparation Mistakes:

  • • Forgetting prayer potions - the pass is dangerous
  • • Not having a chisel for granite
  • • Missing required quest prerequisites
  • • Not bringing a hammer for smithing

Puzzle Mistakes:

  • • Confusing row sums (right side) with column sums (bottom)
  • • Entering numbers in wrong orientation
  • • Not accounting for unclear/damaged numbers
  • • Choosing wrong solution when multiple exist

Combat Mistakes:

  • • Running out of prayer points in the pass
  • • Not using protection prayers effectively
  • • Getting lost in the Underground Pass maze
  • • Not having emergency teleport runes

FAQ