PlaySudoku: platform for global players

Context

Sudoku is one of the most popular puzzles in the world. The PlaySudoku project aims to bring together enthusiasts with challenges and tools.

Problem

• Few well-optimized SEO sites
• Lack of competitive modes
• Poor accessibility in online games

Approach

• Multilingual keyword analysis (IT, EN, DE, ES)
• Responsive design with training & competitive modes
• Continuous testing of SEO and performance

Solution

• Custom sudoku engine with leaderboard
• Training mode + advanced analyzer
• SEO optimized (hreflang, canonical, structured data)

Results

• Top 3 Google for “sudoku online” in multiple languages
• +10,000 registered users in 6 months
• Active and loyal community

Conclusion

PlaySudoku is a demonstration of how an SEO-first project can rapidly scale internationally.