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Snackjack: A toy model of blackjack

Probability · Submitted 4 Jun 2019

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim We can thereby enhance our understanding of blackjack by thoroughly exploring snackjack.

how it is stated · asserted 0.63 read the record →

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arXiv ID1906.01220 (version 1)
Pith IDLIC4N75I, Pith's permanent record of this paper and its review
CitationJiyeon Lee, Stewart N. Ethier. "Snackjack: A toy model of blackjack." arXiv:1906.01220 (2019). https://pith.science/paper/LIC4N75I
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The compiled record

The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 6,843 input tokens.

What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.79 · human participants 0.02 · controlled comparison 0.04 · randomized assignment 0.01 · states quantitative result 0.14 · compares with prior results 0.20 · mentions code or data availability 0.03.

The abstract, sentence by sentence

arXiv listing abstract v1. Results and the main claim are underlined; .

Snackjack is a highly simplified version of blackjack that was proposed by Ethier (2010) and given its name by Epstein (2013). The eight-card deck comprises two aces, two deuces, and four treys, with aces having value either 1 or 4, and deuces and treys having values 2 and 3, respectively. The target total is 7 (vs. 21 in blackjack), and ace-trey is a natural. The dealer stands on 6 and 7, including soft totals, and otherwise hits. The player can stand, hit, double, or split, but split pairs receive only one card per paircard (like split aces in blackjack), and there is no insurance. We analyze the game, both single and multiple deck, deriving basic strategy and one-parameter card-counting systems. Unlike in blackjack, these derivations can be done by hand, though it may nevertheless be easier and more reliable to use a computer. More importantly, the simplicity of snackjack allows us to do computations that would be prohibitively time-consuming at blackjack. We can thereby enhance our understanding of blackjack by thoroughly exploring snackjack.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 Snackjack is a highly simplified version of blackjack that was proposed by Ethier (2010) and given its name by Epstein (2013). background 0.99 0.03 0.03 asserted 1.00
s1 The eight-card deck comprises two aces, two deuces, and four treys, with aces having value either 1 or 4, and deuces and treys having values 2 and 3, respectively. method 0.80 0.09 0.03 asserted 1.00
s2 The target total is 7 (vs. 21 in blackjack), and ace-trey is a natural. method 0.80 0.09 0.03 asserted 1.00
s3 The dealer stands on 6 and 7, including soft totals, and otherwise hits. method 0.78 0.12 0.03 asserted 1.00
s4 The player can stand, hit, double, or split, but split pairs receive only one card per paircard (like split aces in blackjack), and there is no insurance. method 0.79 0.12 0.03 asserted 0.99
s5 We analyze the game, both single and multiple deck, deriving basic strategy and one-parameter card-counting systems. contribution 0.94 0.95 0.11 asserted 1.00
s6 Unlike in blackjack, these derivations can be done by hand, though it may nevertheless be easier and more reliable to use a computer. method 0.53 0.51 0.07 hedged possibility 0.59
s7 More importantly, the simplicity of snackjack allows us to do computations that would be prohibitively time-consuming at blackjack. contribution 0.60 0.45 0.23 asserted 0.86
s8 We can thereby enhance our understanding of blackjack by thoroughly exploring snackjack. interpretation 0.87 0.46 0.61 asserted 0.63

What kind of paper the classifier reports this is: theoretical result 0.96 · evidence from proof or derivation 0.80.

What was examined, and what was not

sources read
  • arXiv listing abstract v1
not examined
  • full text
  • figures and tables
  • references and citing sentences
  • relations to other papers
levels run
  • P abstract
not run
  • S sections
  • T body sentences
  • C citations
  • R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

Snackjack is a highly simplified version of blackjack that was proposed by Ethier (2010) and given its name by Epstein (2013). The eight-card deck comprises two aces, two deuces, and four treys, with aces having value either 1 or 4, and deuces and treys having values 2 and 3, respectively. The target total is 7 (vs. 21 in blackjack), and ace-trey is a natural. The dealer stands on 6 and 7, including soft totals, and otherwise hits. The player can stand, hit, double, or split, but split pairs receive only one card per paircard (like split aces in blackjack), and there is no insurance. We analyze the game, both single and multiple deck, deriving basic strategy and one-parameter card-counting systems. Unlike in blackjack, these derivations can be done by hand, though it may nevertheless be easier and more reliable to use a computer. More importantly, the simplicity of snackjack allows us to do computations that would be prohibitively time-consuming at blackjack. We can thereby enhance our understanding of blackjack by thoroughly exploring snackjack.

Human review
How the literature uses it

1 arXiv paper cite this in 3 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 2 sentences without a confident label

Compares with it 1 paper

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