BlackjackPilot — Blackjack Strategy, EV & RTP Tools
BlackjackPilot is a blackjack training platform with an AI autopilot, hand tracker,
EV/RTP simulator, card counting drills, and Illustrious 18 deviation charts. Practice
blackjack strategy, track sessions, and improve your edge.
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EV & RTP Simulator ·
Strategy Guide · Blog
Blackjack Basic Strategy Chart & Illustrious 18 Deviations
Complete blackjack strategy charts for hard hands, soft hands, and pair splitting.
Supports H17 and S17 rule sets, DAS, late surrender, and single/double/multi-deck
configurations.
Basic Strategy Overview
Blackjack basic strategy is the mathematically optimal move for every player hand
against every dealer up card, given a fixed rule set. Playing perfect basic strategy
reduces the house edge to approximately 0.5% or less depending on the rules.
Key rule effects: H17 (dealer hits soft 17) increases house edge by ~0.2% compared to
S17. DAS (double after split) lowers house edge by ~0.14%. Late surrender lowers house
edge by ~0.07% with correct usage.
Illustrious 18 Deviations
The Illustrious 18 are the 18 most valuable count-based index deviations from basic
strategy for the Hi-Lo card counting system. Mastering these 18 index plays recovers the
majority of the EV available from all possible deviations.
| Hand |
Dealer Up |
Index |
Deviation (vs Basic) |
| Insurance |
A |
+3 |
Take insurance above TC +3 |
| 16 |
10 |
0 |
Stand (basic: hit) at TC ≥ 0 |
| 15 |
10 |
+4 |
Stand at TC ≥ +4 |
| 10,10 |
5 |
+5 |
Split at TC ≥ +5 |
| 10,10 |
6 |
+4 |
Split at TC ≥ +4 |
| 10 |
10 |
+4 |
Double at TC ≥ +4 |
| 12 |
3 |
+2 |
Stand at TC ≥ +2 |
| 12 |
2 |
+3 |
Stand at TC ≥ +3 |
| 11 |
A |
+1 |
Double at TC ≥ +1 (H17) |
| 9 |
2 |
+1 |
Double at TC ≥ +1 |
| 10 |
A |
+4 |
Double at TC ≥ +4 |
| 9 |
7 |
+3 |
Double at TC ≥ +3 |
| 16 |
9 |
+5 |
Stand at TC ≥ +5 |
| 13 |
2 |
-1 |
Stand at TC ≥ -1 |
| 12 |
4 |
0 |
Stand at TC ≥ 0 |
| 12 |
5 |
-2 |
Stand at TC ≥ -2 |
| 12 |
6 |
-1 |
Stand at TC ≥ -1 |
| 13 |
3 |
-2 |
Stand at TC ≥ -2 |
H17 Deviation Chart
When the dealer hits soft 17 (H17 rule), the following index plays change compared to
S17: double 11 vs Ace becomes correct at TC +1 instead of never, and soft 18 (A,7) vs
Ace becomes a double at high positive counts. The H17 rule shifts several indexes by 1–2
points in the positive direction.
S17 Deviation Chart
Under S17 (dealer stands on soft 17), the Illustrious 18 indexes listed above apply
directly. S17 is the more player-favorable rule, reducing the house edge by roughly 0.2%
compared to H17.
Fab 4 Surrender Deviations
The Fab 4 are the four most valuable surrender index plays. They are only applicable
when late surrender is offered: surrender 14 vs 10 at TC ≥ 3, surrender 15 vs 10 at TC ≥
0, surrender 15 vs 9 at TC ≥ 2, and surrender 16 vs A at TC ≥ -1.
Blackjack EV & RTP Simulator
Simulate blackjack expected value (EV) and return to player (RTP) for any rule set.
Compare strategy decisions, run matchup simulations, model bankroll variance, and
backtest custom strategy maps.
What is Blackjack RTP?
Blackjack RTP (Return to Player) is the percentage of total wagered money returned to
the player over a large number of hands. With perfect basic strategy, blackjack RTP is
approximately 99.4–99.6% depending on the rules. This means the house edge is 0.4–0.6%.
RTP is calculated as: RTP = (Total Return / Total Bet) × 100. An RTP of
99.5% means for every $100 wagered, the expected return is $99.50, or a $0.50 expected
loss.
Blackjack EV Calculator
Expected Value (EV) per hand in blackjack is the average profit or loss per unit bet,
expressed as a decimal. EV = −0.005 means you expect to lose 0.5 cents per $1 bet on
average. Card counters can shift EV positive at high true counts.
House Edge by Rule Variation
| Rule |
Effect on House Edge |
| H17 (dealer hits soft 17) |
+0.22% (worse for player) |
| DAS (double after split) |
−0.14% (better for player) |
| Late Surrender |
−0.07% (better for player) |
| Single Deck vs 6 Deck |
−0.58% (better for player) |
| RSA (re-split aces) |
−0.06% (better for player) |
