Infinite Math vs ChessRun Platform

That “I solved it!” feeling, all over again. A math app for grown-ups who solve for pleasure—not for any exam. From the wonder of primes and divisors to the crane-and-turtle puzzle, the Monty Hall problem, and even the legendary entrance exams of Japan's top universities— a collection of beautiful problems that make you feel "numbers are fascinating." ■ Made for you if you ・love numbers and logic puzzles ・enjoy giving your mind a workout in spare moments ・want to know not just the answer, but the idea behind it ・are done with exams, but want to rediscover the joy of math ■ Six categories, 100+ problems (more added over time) ・Number Theory & Puzzles … primes, divisors, Fibonacci, perfect numbers, and more ・Classic Problems … crane-and-turtle, Monty Hall, the Königsberg bridges, Pick's theorem, and more ・Elementary Exams … ferris-wheel logic, seesaw puzzles, and other gems ・Junior-High Exams … work, travel, concentration, and counting problems ・High-School Exams … symmetric expressions, probability, Euler's prime-generating formula ・University Exams … legendary stumpers like "Is tan 1° rational?" and "Prove π > 3.05" ■ Highlights ・Sessions … test yourself with five problems at a time ・Explanations worth reading … not just the answer, but the background and the thinking ・Interactive figures … trace the Königsberg bridges or Pick's theorem with your finger ・Progress tracking … solved problems are recorded; aim to clear them all ・19 languages … enjoy these problems in Japanese, English, Chinese, Korean, and more Answers are simple multiple choice—and some figures come alive at your fingertips. Enjoy the world of numbers on your commute, on a break, or before bed.

ChessRun is a professional platform built specifically for teaching chess online. Instead of combining Zoom, online chess boards, spreadsheets, messaging apps and separate CRM systems, ChessRun brings every part of the teaching process into one integrated workspace. Whether you’re an individual chess coach or manage a large chess school, ChessRun helps you organize lessons, students, homework, scheduling, payments and finances with less administrative work. For Chess Coaches * Teach online with built-in video conferencing and a live chessboard * Manage private lessons, kids lessons and group classes * Organize students, schedules and lesson history * Assign homework and monitor student progress * Store positions, lesson materials and recordings * Track completed lessons and payments For Chess Schools * Complete chess school CRM * Manage coaches, students and groups * Recurring schedules * Student subscriptions and balances * Automatic post-lesson billing * Coach earnings calculation * School finances and cash flow * Centralized management of the entire school Everything in One Platform * Online lessons * Chess board * Video conferencing * Student management * Group management * Homework * Progress tracking * Scheduling * Lesson accounting * Payments * School CRM * Coach payroll * School finances ChessRun replaces scattered tools with one system designed exclusively for chess education.