21 Sharp

Play Sharp. Win Sharp.

Professional-grade blackjack training that teaches you basic strategy and card counting—the same techniques used by advantage players to beat the house.

Basic Strategy Training

Learn the mathematically optimal play for every hand. Reduce the house edge to just 0.5%.

Card Counting Drills

Master the Hi-Lo system with speed-building exercises. Track running counts and calculate true counts.

Practice Table

Play realistic hands with real-time strategy hints. Learn from mistakes without risking real money.

Track Your Progress

Unlock 25+ achievements. Monitor accuracy, streaks, and stats across all training modes.