One house. Many ways to investigate.

Solve the same Medium case as everyone else in each of Solve House's fifteen deduction systems. Daily solves build your personal and shared streaks.

1. 1Open the Daily Board.
2. 2Choose any of the fifteen systems.
3. 3Read the evidence and make one final deduction.
4. 4Return tomorrow to keep your streak alive.

Choose a game and difficulty, then open fresh certified cases from the Solve House archive. Free investigators receive a daily allowance; Pro removes the limit.

1. 1Choose a game system.
2. 2Pick Easy, Medium, Hard, or Expert.
3. 3Solve the case; hints and wrong attempts affect the result.
4. 4Open another file or follow the recommended difficulty.

A server-verified weekly objective rewards investigators who solve on multiple days and across different deduction systems, not only one favorite game.

1. 1Solve Daily cases on different UTC days.
2. 2Record unique solves across at least three systems.
3. 3Watch the weekly file unlock as your range grows.
4. 4Complete the objective to earn the House Range milestone.

Timeline reconstruction, spatial reasoning, network logic, sound, visibility, ledgers, access graphs and more. Each family has multiple reasoning archetypes.

1. 1Browse the archive.
2. 2Open a system that matches how you like to reason.
3. 3Use its short tutorial to learn the rules.
4. 4Build mastery by solving unique cases in that family.

After solving a certified case, create a challenge link. Your friend receives the same locked case so the comparison is meaningful.

1. 1Solve a certified case.
2. 2Choose Challenge a friend.
3. 3Send the generated link.
4. 4Compare first verified finishes on the challenge board.

When two signed-in investigators meet through an exact-case challenge, they can become Rivals and compare verified progress over time.

1. 1Complete an exact-case challenge with another signed-in investigator.
2. 2Open the Rival Board.
3. 3Compare verified scores and streaks.
4. 4Optionally start a shared Daily streak together.

A Rival can invite you into a shared streak. It becomes active only after both people consent and counts a day only when both solve at least one Daily.

1. 1Become Rivals first.
2. 2One Rival sends a shared-streak invitation.
3. 3The other accepts it.
4. 4Both solve at least one Daily each UTC day; use one in-app nudge if needed.

Two investigators receive deterministic File A and File B evidence. The solution stays server-side; collaboration is required to close the case.

1. 1A Pro investigator creates a co-op room.
2. 2Send the invitation to one partner.
3. 3Each partner receives a different evidence file.
4. 4Share findings in the partner channel and submit one shared deduction.

Join asynchronous competitions where the timer begins on first opening and restarts do not erase penalties. The leaderboard is built from server-verified results.

1. 1Join an active public tournament.
2. 2Open each slot when you are ready.
3. 3Solve the locked case; the first verified finish is final.
4. 4Watch the live leaderboard update as competitors complete slots.

Pro investigators can create a private tournament, generate an invite link, and run the same server-authoritative format for friends or teams.

1. 1Open Tournaments while signed in with Pro.
2. 2Create a private competition and choose its case settings.
3. 3Share the private invitation.
4. 4Entrants join, solve the same sequence, and compare verified totals.

Create or join a public or private investigation circle. Club weekly scores are derived from verified unique solves, never browser-submitted points.

1. 1Browse public clubs or create your own.
2. 2Share a private club code when needed.
3. 3Members solve certified cases normally.
4. 4The club board aggregates verified weekly progress.

Unique solves, clean deductions, streaks, competition, co-op, community participation and books can unlock milestones and raise your investigator rank.

1. 1Create a free investigator account.
2. 2Solve unique certified cases.
3. 3Complete special behaviors such as streaks, tournaments, co-op or community milestones.
4. 4Track rank and unlocked achievements on your dashboard.

Publish notes, questions and theories, comment and react, label spoilers, report abuse and block users. Moderation controls what stays public.

1. 1Open the Caseboard.
2. 2Read public notes or sign in to contribute.
3. 3Mark spoiler-heavy content before posting.
4. 4React, comment, report, or block when appropriate.

Submit your own structured deduction case for review. A moderator checks that exactly one answer is supported before a case can become playable.

1. 1Open Submit a Case while signed in.
2. 2Provide the setup, clues, choices and intended solution.
3. 3Submit it for moderation and uniqueness review.
4. 4If approved and published, the solution remains server-side until a player solves it.

Share your personal referral link. A referral qualifies only after the new investigator confirms an account and completes a first unique verified solve.

1. 1Open your Referral Desk.
2. 2Copy your personal invitation link.
3. 3A new investigator signs up through it.
4. 4The referral qualifies after their first unique verified solve.

Important in-product events can appear in your notification center. Email/browser/native delivery preferences remain opt-in and are not silently enabled.

1. 1Open Notifications while signed in.
2. 2Review new in-app notices.
3. 3Mark items read when handled.
4. 4Choose email or push preferences separately if a delivery provider is configured.

Subscribe explicitly to product notes, standout community cases, tournament windows and new puzzle systems. Subscription and unsubscribe state are stored separately from gameplay.

1. 1Open The House Letter.
2. 2Enter the email address you want to use.
3. 3Subscribe explicitly; gameplay does not auto-enroll you.
4. 4Use the unsubscribe flow whenever you no longer want the digest.

Solve House is installable as a PWA on supported browsers. A Capacitor wrapper is also prepared for native packaging without changing the core web account or puzzle engine.

1. 1Sign in on a supported browser.
2. 2Use Install Solve House when the browser offers it.
3. 3Launch from your home screen or app launcher.
4. 4Your account and verified archive stay synchronized.

Books remain complete offline. Optional companion and unlock flows connect physical Solve House products to the online investigator ecosystem.

1. 1Choose a Solve House book.
2. 2Solve the printed experience completely offline if you prefer.
3. 3Use any included companion/unlock flow when offered.
4. 4Carry eligible book milestones into your online investigator record.