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Last Updated: April 4, 2019

Blackjack Block Bonus

Introduction

Block Bonus, or Blackjack Block Bonus, is a side bet based on the player's initial two cards and the dealer's up card. It wins if one of the suit of the dealer's card matches the suit of at least one player card and that player card is greater in rank than the dealer's card. The win will depend on details of the other player card involved.

I hear Blackjack Block Bonus can be found in some casinos in Egypt, Ireland, and eastern Europe.

This bet should not be confused with the Block Pro Blackjack.

Rules

  1. The game can be played with any number of 52-card decks.
  2. Cards are ranked the same way as in poker, except aces are high only.
  3. All wins are based on the player's initial two cards and the dealer's up card.
  4. Following are the ways to win:
    • Ultimate Block — All three cards are suited, player cards are the same rank, and the player rank is greater than the dealer's rank.
    • Pair Block — Player cards are the same rank but different suits, the dealer's suit matches one of the player suits, and the player card of that matching suit exceeds the dealer's rank.
    • Flush Block — All three cards are suited, player cards are different ranks, and at least one player card is greater than the dealer's rank.
    • Normal Block — Player cards are different in both rank and suit, the dealer's suit matches one of the player suits, and the player card of that matching suit exceeds the dealer's rank.
  5. If at least one of the player cards matches the dealer's card in both rank and suit, and the other card (if any) does not result in a win, then the outcome shall be a push.
  6. Wins shall depend on the number of decks used, as shown in the pay table below.

The following shoes the pay table, which varies according to the number of decks. All wins are on a "to one" basis. Please note an Ultimate Block is impossible with one deck.

Pay Table

Event One
Deck
Two
Decks
Four
Decks
5-8
Decks
Ultimate Block n/a 60 40 35
Pair Block 15 10 10 10
Flush Block 5 5 5 5
Normal Block 2 2 2 2

Here is another way of explaining the different wins:

  • Ultimate Block — All three cards are suited, player cards are the same rank, and the player rank is greater than the dealer's rank.
  • Normal Block — Player cards are different in both rank and suit, the dealer's suit matches one of the player suits, and the player card of that matching suit exceeds the dealer's rank.
  • Flush Block — Same as a Normal Block, except the two player cards are suited.
  • Pair Block — Same as a Normal Block, except the two player cards are the same rank.
  • Ultimate Block — Same as a Normal Block, except the two player cards are the same in suit and rank.

Here are some examples of various situations and how they are scored.

Examples

Player Cards Dealer Up Card Score
Js, Qc 5d Loss
Js, Qs 5d Loss
Js, Qc Ks Loss
Js, Qs Ks Loss
Js, Js Ks Loss
Js, Qs Qs Push
Js, Qc Qc Push
Js, Js Js Push
Js, Qc 5c Normal Block
Js, Qs Js Flush Block
Js, Ks Qs Flush Block
Js, Jc 5s Pair Block
Js, Js 5s Ultimate Block

Analysis

Following is my analysis with eight decks. The lower right cell shows a house edge of 4.96%.

Eight Decks

Event Pays Combinations Probability Return
Ultimate Block 35 69,888 0.001956 0.068448
Pair Block 10 479,232 0.013410 0.134102
Flush Block 5 1,311,232 0.036692 0.183458
Normal Block 2 5,750,784 0.160922 0.321844
Push 0 1,057,056 0.029579 0.000000
All other -1 27,068,288 0.757441 -0.757441
Total 35,736,480 1.000000 -0.049590

Following is my analysis with six decks. The lower right cell shows a house edge of 5.32%.

Six Decks

Event Pays Combinations Probability Return
Ultimate Block 35 28,080 0.001867 0.065346
Pair Block 10 202,176 0.013443 0.134426
Flush Block 5 550,368 0.036594 0.182969
Normal Block 2 2,426,112 0.161311 0.322622
Push 0 424,320 0.028213 0.000000
All other -1 11,408,904 0.758573 -0.758573
Total 15,039,960 1.000000 -0.053210

Following is my analysis with four decks. The lower right cell shows a house edge of 5.21%.

Four Decks

Event Pays Combinations Probability Return
Ultimate Block 40 7,488 0.001688 0.067539
Pair Block 10 59,904 0.013508 0.135078
Flush Block 5 161,408 0.036396 0.181980
Normal Block 2 718,848 0.162094 0.324187
Push 0 112,944 0.025468 0.000000
All other -1 3,374,176 0.760846 -0.760846
Total 4,434,768 1.000000 -0.052061

Following is my analysis with two decks. The lower right cell shows a house edge of 5.43%.

Two Decks

Event Pays Combinations Probability Return
Ultimate Block 60 624 0.001142 0.068532
Pair Block 10 7,488 0.013706 0.137065
Flush Block 5 19,552 0.035789 0.178945
Normal Block 2 89,856 0.164477 0.328955
Push 0 9,360 0.017133 0.000000
All other -1 419,432 0.767752 -0.767752
Total 546,312 1.000000 -0.054255

Following is my analysis with one deck. The lower right cell shows a house edge of 5.88%.

One Deck

Event Pays Combinations Probability Return
Pair Block 15 936 0.014118 0.211765
Flush Block 5 2,288 0.034510 0.172549
Normal Block 2 11,232 0.169412 0.338824
Push 0 - 0.000000 0.000000
All other -1 51,844 0.781961 -0.781961
Total 66,300 1.000000 -0.058824

Full list of blackjack side bets.


Written by: Michael Shackleford

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