二十一点 AI 策略计算器
基于基本策略给出最优动作建议
桌上其他玩家数量不会影响基本策略决策。你始终是在和庄家对抗。
选择牌面以获取推荐
基本策略表
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点击任意单元格更改推荐动作。修改会自动保存。
Disclaimer: This calculator is provided for educational and entertainment purposes only. Gambling involves risk and you should never bet more than you can afford to lose. We are not responsible for any financial losses incurred while using this tool or following its recommendations. Past performance and statistical probabilities do not guarantee future results. Please gamble responsibly.
如何使用二十一点策略计算器
这个免费的二十一点基本策略计算器可帮助你在牌桌上做出更优决策。获得即时建议，并可按你的玩法自定义策略表。
- 通过选牌器选择你的两张手牌
- 选择庄家的明牌
- 查看推荐动作（要牌、停牌、加倍、分牌或投降）
- 查看基于 Monte Carlo 模拟的胜/负/和概率
- 可选：自定义策略表 - 修改会自动保存
理解基本策略
什么是基本策略？
基本策略是在二十一点中针对每一手牌的数学最优打法。正确执行可将赌场优势降低到约 0.5%。本计算器采用常见赌场规则下的 4-8 副牌标准策略。
硬牌 vs 软牌
“硬牌”不包含可当作 11 的 A；“软牌”包含一个 A，且该 A 可当作 11 而不爆牌。软牌更灵活，因为再要一张牌不容易直接爆。
何时加倍
加倍表示将下注翻倍并仅再要一张牌。基本策略通常建议在点数 9、10、11 且庄家明牌较弱时加倍，以最大化优势。
何时分牌
A 和 8 通常应分牌；10 和 5 通常不分。其他对子取决于庄家明牌。分牌把一手变两手，可能提高获胜机会。
自定义你的策略
策略表可编辑。点击任意单元格即可更改推荐动作。你可以：
- 根据特定赌场规则调整（庄家 soft 17 要牌/停牌）
- 用更保守或更激进的方式练习
- 考虑你所在赌场的投降规则
- 基于算牌偏差创建自定义策略
你的自定义会自动保存在浏览器中。使用“重置为默认”恢复标准基本策略。
Frequently Asked Questions
▶What is blackjack basic strategy?
Basic strategy is the mathematically optimal way to play every blackjack hand based on your cards and the dealer's up card. It covers when to hit, stand, double down, split, or surrender. Following basic strategy reduces the house edge to approximately 0.5%.
▶When should I hit or stand in blackjack?
Generally: stand on hard 17 or higher, hit on hard 11 or lower. For hands 12-16, the decision depends on the dealer's up card. Our interactive chart shows the exact optimal play for every combination of your hand vs the dealer's card.
▶When should I double down in blackjack?
Double down on hard 11 against any dealer card except an Ace. Double on hard 10 when the dealer shows 2-9. Double on hard 9 when the dealer shows 3-6. For soft hands (with an Ace), double on soft 13-18 against certain dealer cards. Check our strategy chart for the complete guide.
▶When should I split pairs in blackjack?
Always split Aces and 8s. Never split 10s or 5s. Split 2s, 3s, 6s, 7s against dealer 2-7. Split 4s against dealer 5-6. Split 9s against dealer 2-9 (except 7). Our calculator shows the optimal split decision for every pair.
▶Is this blackjack strategy chart free to use?
Yes, our blackjack strategy chart and calculator are completely free with no signup required. You can look up any hand combination, get AI-powered recommendations, and even customize the strategy chart to save your preferred modifications.
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