Seeking Edges

Basic strategy

The right play for every hand

Total-dependent optimal strategy (infinite-deck exact DP) for each rules combination. Adjust the toggles and the chart updates instantly. Shared with the hand calculator.

Ruleset

Same parameters as blackjack_engine.Rules. Chart is total-dependent basic strategy (composition-independent).

Number of decks

Rules.num_decks

Dealer on soft 17

Rules.dealer_hits_soft_17

Blackjack pays

Rules.blackjack_payout

Surrender

Rules.surrender

Dealing / hole card

Rules.dealer_peeks, european, european_obo

Player options

Double after split

Rules.double_after_split

Double on

Rules.double_on (allowed hard totals)

Max split hands

Rules.max_split_hands (1 = no split)

Max ace split hands

Rules.max_split_ace_hands

Hit split aces

Rules.hit_split_aces

Active rules: 8 decks · US (dealer peek) · S17 · BJ 3:2 · DAS · double any two cards · max 4 hands · max 2 ace hands · one card on split aces · no surrender

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HitStandDoubleSplitSurrender

Hard totals

Two-card totals without an ace counted as 11

Your hand2345678910A
20
H
H
H
H
H
H
H
H
H
H
19
H
H
H
H
H
H
H
H
H
H
18
H
H
H
H
H
H
H
H
H
H
17
H
H
H
H
H
H
H
H
H
H
16
H
H
H
H
H
H
H
H
H
H
15
H
H
H
H
H
H
H
H
H
H
14
H
H
H
H
H
H
H
H
H
H
13
H
H
H
H
H
H
H
H
H
H
12
H
H
H
H
H
H
H
H
H
H
11
H
H
H
H
H
H
H
H
H
H
10
H
H
H
H
H
H
H
H
H
H
9
H
H
H
H
H
H
H
H
H
H
8
H
H
H
H
H
H
H
H
H
H
7
H
H
H
H
H
H
H
H
H
H
6
H
H
H
H
H
H
H
H
H
H
5
H
H
H
H
H
H
H
H
H
H
4
H
H
H
H
H
H
H
H
H
H

Soft totals

Hands with an ace valued as 11

Your hand2345678910A
20
H
H
H
H
H
H
H
H
H
H
19
H
H
H
H
H
H
H
H
H
H
18
H
H
H
H
H
H
H
H
H
H
17
H
H
H
H
H
H
H
H
H
H
16
H
H
H
H
H
H
H
H
H
H
15
H
H
H
H
H
H
H
H
H
H
14
H
H
H
H
H
H
H
H
H
H
13
H
H
H
H
H
H
H
H
H
H
12
H
H
H
H
H
H
H
H
H
H

Pairs

Split when shown · otherwise play as a hard total

Your hand2345678910A
A,A
H
H
H
H
H
H
H
H
H
H
10,10
H
H
H
H
H
H
H
H
H
H
9,9
H
H
H
H
H
H
H
H
H
H
8,8
H
H
H
H
H
H
H
H
H
H
7,7
H
H
H
H
H
H
H
H
H
H
6,6
H
H
H
H
H
H
H
H
H
H
5,5
H
H
H
H
H
H
H
H
H
H
4,4
H
H
H
H
H
H
H
H
H
H
3,3
H
H
H
H
H
H
H
H
H
H
2,2
H
H
H
H
H
H
H
H
H
H

Source: data/chart-pack/ (3,456 rulesets). Deck count uses the same infinite-deck approximation for 1–10 decks; BJ payout affects house edge only. D / Ds / Dh follow pack codes — double if allowed, else hit or stand as marked.