GRANDMASTER CHALLENGE

Official Rules - Last updated: April 15, 2026

1. OVERVIEW

The TESSERA Grandmaster Challenge ("Challenge") is an annual skill-based competition with a prize of $5,000 USD. The Challenge runs on a 365-day cycle beginning from the App launch date. This is not a lottery, sweepstakes, or game of chance. Qualification is based entirely on sustained skill-based gameplay and engagement.

2. ELIGIBILITY

• Must be at least 18 years of age
• Must have a registered TESSERA account (not guest)
• Must have an active TESSERA PRO subscription for at least 6 months of the challenge year
• Must complete KYC verification (government-issued ID, full name, country of residence)
• Account must be in good standing (no bans, no cheating flags, no Terms violations)
• Residents of jurisdictions where such competitions are prohibited are not eligible

3. QUALIFICATION CRITERIA

All of the following must be met during a single challenge year:

1. Level Requirement: Reach Level 3,999 or higher
2. Play Time Requirement: Average daily play time of 14+ hours per day, measured over a 30-day rolling window, maintained for at least 3 consecutive months
3. Referral Requirement: At least 100 confirmed referrals (each referred user must have reached Level 10 or higher)
4. Subscription Requirement: Active TESSERA PRO subscription for at least 6 of the 12 challenge months
5. Account Standing: No bans, suspensions, or confirmed cheating violations during the challenge period
6. KYC Verification: Completed before the challenge deadline

4. VERIFICATION AND ANTI-FRAUD

• Play time is verified server-side using session heartbeats sent every 60 seconds
• Random "proof of play" puzzles may be presented to verify human activity
• Device sensor data (accelerometer, touch patterns) is analyzed for bot detection
• Referrals are verified: each referred user must have 50+ levels played
• All qualifying accounts undergo manual review before payout
• Statistical analysis flags impossible play patterns for investigation

5. PRIZE STRUCTURE

• Prize: $5,000 USD per qualifying user
• If fewer than 10 users qualify, each receives $5,000
• If 10 or more users qualify, the top 3 by total score receive $5,000 each
• Payment methods: wire transfer, PayPal, or cryptocurrency (USDC on Polygon)
• Payout within 30 days of challenge year end

6. TAX RESPONSIBILITY

Prize winners are solely responsible for all applicable taxes on their winnings. Kelthos Inc. may be required to report prize payments to tax authorities depending on your jurisdiction. Winners may be asked to provide tax identification information (e.g., W-9 for US residents, W-8BEN for non-US residents).

7. MODIFICATION AND CANCELLATION

Kelthos Inc. reserves the right to modify, suspend, or cancel the Challenge at any time if manipulation, fraud, or technical failures compromise the integrity of the competition. In case of cancellation, qualified users at the time of cancellation will receive a pro-rated prize.

8. DISPUTE RESOLUTION

Disputes related to the Challenge will be resolved through binding arbitration under the rules of the American Arbitration Association. The decision of the arbitrator is final. Class action claims are waived.

9. CONTACT