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Blackjack Team Play table

Blackjack Team Play · 20 rounds · Sep 28, 2026, 9:29 AM UTC

Mixed team: three different models share one bankroll.

2 of 132 decisions were server fallbacks

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Mixed team: three different models share one bankroll.

655 / 655

Action timeline

Model's stated reason

Fresh shoe with a neutral count of zero calls for a table minimum bet. Conserving bankroll until positive counts emerge.

Model's stated reason

Fresh six-deck shoe has no information advantage, so the house edge is negative EV; betting the minimum 5 preserves bankroll for later opportunities.

Model's stated reason

With double after split allowed, splitting 2s against a dealer 7 is the basic-strategy play.

Model's stated reason

Hard 12 against a dealer 7 is a hit; doubling or standing has lower expected value.

Model's stated reason

Hard 14 against a dealer 7 is a hit; standing is unlikely to win unless the dealer busts.

Model's stated reason

Hard 16 against a dealer 7 is a hit; the modest count does not warrant standing.

Model's stated reason

Basic strategy calls for hitting hard 12 against a dealer 7, including after a split.

Stated reasons appear after the comparison block is revealed. They are model-submitted text, not verified reasoning.

Agent table chat

Chat on
Gemini 3.8 Flash#1

Fresh shoe, betting minimum 5 chips.

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DeepSeek V4.1 Flash#3

Fresh shoe, no info yet: everyone bet the minimum 5. We'll size up only when the count/edge favors us.

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GPT-6 Sol#5

Betting 5 on the fresh shoe; I'll track the count as cards are revealed.

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Gemini 3.8 Flash#14

Hitting hard 13 against dealer 7.

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DeepSeek V4.1 Flash#17

Seat 2: hard 12 vs dealer 7, hitting. Dealer stands on soft 17, so no double here.

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DeepSeek V4.1 Flash#20

Seat 2: standing on hard 18 vs dealer 7. Dealer stands on soft 17, so 18 is strong enough; no need to risk busting.

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GPT-6 Sol#22

Splitting 2,2 vs dealer 7 (DAS). Hi-Lo running count +3 after 9 visible cards.

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GPT-6 Sol#26

Hitting hard 12 vs dealer 7. Hi-Lo running count is +1 across the 11 visible cards.

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GPT-6 Sol#29

Hitting hard 14 vs dealer 7. Hi-Lo running count is +2 after 12 visible cards.

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GPT-6 Sol#32

Hitting hard 16 vs dealer 7. Hi-Lo running count remains +2 after 13 visible cards.

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GPT-6 Sol#35

Standing on hard 20 vs dealer 7. Hi-Lo running count is +3 after 14 visible cards.

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GPT-6 Sol#37

Hitting hard 12 vs dealer 7; doubling is unfavorable.

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GPT-6 Sol#40

Hitting hard 14 vs dealer 7. Hi-Lo running count is +5 after 15 visible cards.

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GPT-6 Sol#43

Standing on hard 20 vs dealer 7. Hi-Lo running count is +6 after 16 visible cards.

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Gemini 3.8 Flash#50

RC +8, ~5.6 decks left, TC ~+1.4. Sizing up to 10 chips.

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GPT-6 Sol#53

RC +8, TC about +1.4, but seven of the low cards removed were 2s, so Hi-Lo may overstate the edge. I’m staying at 5 this round.

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Gemini 3.8 Flash#62

Standing on hard 13 vs dealer 4.

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DeepSeek V4.1 Flash#64

Seat 2: standing on hard 12 vs dealer 4. Let the dealer take the bust risk.

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Gemini 3.8 Flash#70

RC +8, ~5.5 decks remaining, TC ~+1.5. Betting 10 chips.

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DeepSeek V4.1 Flash#72

RC +8, TC ~1.5. Positive edge. I'm betting 50 to maximize EV. Recommend sizing up.

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GPT-6 Sol#74

RC +8, TC ~+1.5, but seven of the removed low cards are 2s. That mix may overstate our edge, so I’m betting 5.

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Gemini 3.8 Flash#84

Hitting hard 15 vs dealer 10 (TC ~+1.5).

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DeepSeek V4.1 Flash#87

Seat 2: hard 12 vs dealer 10, hitting. Positive count doesn't change the basic play here.

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DeepSeek V4.1 Flash#90

Seat 2: hard 16 vs dealer 10, hitting. Positive count doesn't make standing on 16 correct.

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DeepSeek V4.1 Flash#93

Seat 2: standing on hard 20 vs dealer 10.

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GPT-6 Sol#95

Hitting hard 14 vs dealer 10. For future hands, hard 16 vs 10 generally stands when the true count is nonnegative and surrender is unavailable.

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Gemini 3.8 Flash#102

RC +9, ~5.2 decks remaining, TC ~+1.7. Sizing up to 15 chips.

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DeepSeek V4.1 Flash#104

RC +9, TC ~+1.7. Positive edge; I'm betting 50 to maximize EV. Recommend sizing up if comfortable.

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GPT-6 Sol#106

Running count +9, about 5.2 decks remain (true count ~+1.7). I'm betting 50 for the likely positive edge, though the unusually large number of removed 2s makes the estimate less certain.

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Gemini 3.8 Flash#116

Hitting hard 15 vs dealer 10 (TC ~+1.6, index to stand is +4).

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DeepSeek V4.1 Flash#119

Seat 2: standing on hard 20 vs dealer K. No reason to hit, double, or split.

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GPT-6 Sol#121

Doubling hard 11 vs dealer K; dealer has already checked for blackjack.

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Gemini 3.8 Flash#130

RC +8, ~5.0 decks remaining, TC ~+1.6. Betting 20 chips.

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DeepSeek V4.1 Flash#132

RC +8, ~5.0 decks left, TC ~+1.6. Positive edge; I'm betting 50 to maximize EV. Recommend sizing up if you agree.

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GPT-6 Sol#134

RC +8 over 54 seen cards; about 5 decks remain (TC ~+1.6). Betting 50 for the likely positive edge.

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Gemini 3.8 Flash#143

Standing on 20 (Jh-Jh) vs dealer 4.

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DeepSeek V4.1 Flash#145

Seat 2: standing on hard 16 vs dealer 4. Let the dealer take the bust risk.

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GPT-6 Sol#147

Standing on hard 16 vs dealer 4; let the dealer take the bust risk.

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Gemini 3.8 Flash#153

RC +7, ~4.8 decks remaining, TC ~+1.5. Sizing up to 25 chips.

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DeepSeek V4.1 Flash#155

RC +7, ~4.8 decks left, TC ~+1.5. Positive edge; I'm betting 50 to maximize EV. Recommend sizing up if comfortable.

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GPT-6 Sol#157

Hi-Lo running count +7 over 63 seen cards; true count about +1.46. Betting 50 for the estimated positive edge.

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Gemini 3.8 Flash#166

Standing on hard 13 vs dealer 2.

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DeepSeek V4.1 Flash#168

Seat 2: standing on hard 13 vs dealer 2. Dealer stands on soft 17, so let the dealer take the bust risk.

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GPT-6 Sol#170

Standing on hard 15 against dealer 2; dealer has the greater bust risk.

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Gemini 3.8 Flash#176

RC +8, ~4.6 decks left, TC ~+1.7. Joining at max bet of 50 chips.

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DeepSeek V4.1 Flash#178

Seat 2: RC +8, ~4.6 decks left, TC ~+1.7. Positive edge; I'm at 50. Recommend max bet if comfortable.

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GPT-6 Sol#180

I’m betting 50. Hi-Lo running count is about +8 with roughly 4.6 decks remaining (true count ~+1.7), suggesting a positive edge.

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Gemini 3.8 Flash#189

Hitting soft 13 vs dealer 4.

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Gemini 3.8 Flash#192

Standing on soft 18 vs dealer 4.

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DeepSeek V4.1 Flash#194

Seat 2: doubling hard 10 vs dealer 4; positive count supports max exposure.

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GPT-6 Sol#197

Standing on 20 (Q-Q) against dealer 4; splitting tens would sacrifice a strong hand.

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Gemini 3.8 Flash#203

RC +8, ~4.4 decks left, TC ~+1.8. Sticking with max bet 50.

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DeepSeek V4.1 Flash#205

Seat 2: RC +8, ~4.4 decks left, TC ~+1.8. Positive edge; I'm betting 50. Recommend max bet if comfortable.

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GPT-6 Sol#207

RC +8 over 83 visible cards; about 4.4 decks remain (TC ~+1.8). Betting 50 for the estimated positive edge.

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Gemini 3.8 Flash#216

Doubling hard 11 vs dealer 8.

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DeepSeek V4.1 Flash#219

Seat 2: hard 8 vs dealer 8, hitting. No double on 8; count is positive but basic play is still to take a card.

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DeepSeek V4.1 Flash#222

Seat 2: standing on soft 19 vs dealer 8. No double available; 19 is strong enough.

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GPT-6 Sol#224

Splitting A,A vs dealer 8. Each ace receives one card, giving us two chances at strong totals.

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Gemini 3.8 Flash#232

RC +8, ~4.15 decks remaining, TC ~+1.9. Max betting 50 chips.

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DeepSeek V4.1 Flash#234

Seat 2: RC +8, ~4.15 decks left, TC ~+1.9. Positive edge; betting 50. Recommend max bet if comfortable.

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GPT-6 Sol#236

RC +8 over roughly 96 seen cards; TC about +1.9. Betting 50 for the estimated positive edge.

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Gemini 3.8 Flash#245

Hitting hard 8 vs dealer 8.

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Gemini 3.8 Flash#248

Hitting hard 12 vs dealer 8.

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Gemini 3.8 Flash#251

Standing on hard 20 vs dealer 8.

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DeepSeek V4.1 Flash#253

Seat 2: standing on hard 17 vs dealer 8. No double here; 17 is a stand.

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GPT-6 Sol#255

Hitting hard 13 against dealer 8.

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GPT-6 Sol#258

Hitting hard 15 against dealer 8; standing is unlikely to win unless the dealer busts.

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GPT-6 Sol#261

Standing on hard 19 vs dealer 8.

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Gemini 3.8 Flash#267

RC +14, ~3.9 decks remaining, TC ~+3.6. Strong positive edge, max betting 50 chips.

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DeepSeek V4.1 Flash#269

RC +14, ~3.9 decks left, TC ~+3.6. Strong edge; I'm max betting 50. Recommend 50 if comfortable.

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GPT-6 Sol#271

RC +14, about 3.9 decks remaining: true count ~+3.6. Betting the 50-chip maximum.

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Gemini 3.8 Flash#281

Standing on 20 (Kd-Jd) vs dealer 10.

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DeepSeek V4.1 Flash#283

Seat 2: hitting hard 7 vs dealer 10. No double on 7; just taking a card.

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Gemini 3.8 Flash#290

RC +9, ~3.7 decks left, TC ~+2.4. Advantage remains in our favor, continuing with max bet 50.

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DeepSeek V4.1 Flash#292

Seat 2: RC +9, TC ~+2.4. Positive edge; I'm max betting 50. Recommend same if comfortable.

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GPT-6 Sol#294

RC +9 with about 3.7 decks remaining (TC ~+2.4). I’m betting 50; the shoe still appears favorable.

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Gemini 3.8 Flash#306

RC +5, ~3.6 decks left, TC ~+1.4. Several high cards fell last round, lowering the count. Stepping down to 25 chips.

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DeepSeek V4.1 Flash#308

Seat 2: RC +5, ~3.6 decks left, TC ~+1.4. Still a positive edge; I'm betting 50. Recommend max bet if comfortable.

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GPT-6 Sol#310

Hi-Lo running count +5 with about 3.6 decks left (true count ~+1.4). I'm betting 50 for the estimated small positive edge.

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Gemini 3.8 Flash#319

Standing on soft 19 vs dealer 3.

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DeepSeek V4.1 Flash#321

Seat 2: standing on hard 20 vs dealer 3. No reason to hit, double, or split a made 20.

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GPT-6 Sol#323

Standing on hard 18 vs dealer 3.

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Gemini 3.8 Flash#329

RC +2, ~3.4 decks remaining, TC ~+0.6. Advantage has faded below positive edge; dropping to minimum bet of 5 chips.

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DeepSeek V4.1 Flash#331

Seat 2: RC +2, TC ~+0.6, edge has faded. Betting minimum 5 and conserving bankroll for stronger counts.

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GPT-6 Sol#333

RC +2 with about 3.4 decks remaining (TC ~+0.6). Betting the 5-chip minimum; the count no longer indicates a player advantage.

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Gemini 3.8 Flash#342

Hitting hard 13 vs dealer 7.

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Gemini 3.8 Flash#345

Standing on hard 17 vs dealer 7.

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DeepSeek V4.1 Flash#347

Seat 2: hard 16 vs dealer 7, hitting. Dealer stands on soft 17, so standing on 16 is too weak here.

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GPT-6 Sol#350

Hitting hard 13 against dealer 7.

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Gemini 3.8 Flash#356

RC 0, ~3.2 decks remaining, TC 0. Count is neutral, betting minimum 5 chips.

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DeepSeek V4.1 Flash#358

Seat 2: RC 0, TC ~0. No edge; betting minimum 5 and conserving bankroll for a better count.

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GPT-6 Sol#360

Count is approximately neutral, so I’m betting the 5-chip minimum.

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Gemini 3.8 Flash#369

Standing on hard 17 vs dealer 6.

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DeepSeek V4.1 Flash#371

Seat 2: standing on hard 15 vs dealer 6. Let the dealer take the bust risk.

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Gemini 3.8 Flash#377

RC -4, ~3.0 decks remaining, TC ~-1.3. Count turned negative, betting minimum 5 chips.

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DeepSeek V4.1 Flash#379

Seat 2: RC -4, ~3.0 decks left, TC ~-1.3. Negative edge, so I'm betting the 5-chip minimum and conserving bankroll.

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GPT-6 Sol#381

RC about -4, TC about -1.3. Betting the 5-chip minimum; the shoe is unfavorable.

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Gemini 3.8 Flash#390

Standing on hard 16 vs dealer 4.

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DeepSeek V4.1 Flash#392

Seat 2: standing on hard 18 vs dealer 4. Dealer stands on soft 17; no reason to risk a made 18.

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GPT-6 Sol#394

Standing on hard 16 vs dealer 4; let the dealer take the bust risk.

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Gemini 3.8 Flash#400

RC -6, ~2.8 decks remaining, TC ~-2.1. Unfavorable shoe, betting minimum 5 chips.

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DeepSeek V4.1 Flash#402

RC -6, ~2.8 decks left, TC ~-2.1. Negative edge: betting minimum 5 and conserving bankroll for a better count.

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GPT-6 Sol#404

RC about -6, TC about -2.1. I'm betting the 5-chip minimum in this unfavorable shoe.

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Gemini 3.8 Flash#414

Standing on hard 18 vs dealer K.

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DeepSeek V4.1 Flash#416

Seat 2: hard 12 vs dealer K, hitting. Negative count, no double; keep conserving bankroll.

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DeepSeek V4.1 Flash#419

Seat 2: hard 15 vs dealer K, hitting. Negative count, no double; keep conserving bankroll.

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GPT-6 Sol#422

Hitting hard 15 vs dealer K; the negative count reinforces taking a card.

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Gemini 3.8 Flash#428

RC -5, ~2.6 decks remaining, TC ~-1.9. Count is negative, betting minimum 5 chips.

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DeepSeek V4.1 Flash#430

Agree with seat 1: RC -5, TC about -1.9, negative edge. Betting the 5-chip minimum and conserving bankroll for any late favorable count.

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GPT-6 Sol#432

Agreed: the count remains negative (TC about -1.9). Betting the 5-chip minimum.

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Gemini 3.8 Flash#441

Standing on hard 18 vs dealer 5.

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DeepSeek V4.1 Flash#443

Seat 2: doubling soft 16 vs dealer 5. Negative count, but this is a basic double and the dealer's 5 has high bust risk.

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GPT-6 Sol#446

Standing on hard 13 vs dealer 5; the dealer's weak upcard makes hitting unnecessarily risky.

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Gemini 3.8 Flash#453

RC ~0, ~2.5 decks left, TC ~0. Shoe is neutral; betting minimum 5 chips.

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DeepSeek V4.1 Flash#455

RC -1 over 186 seen, ~2.4 decks left, TC ~-0.4. No edge; betting minimum 5 and conserving bankroll for a late favorable count.

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GPT-6 Sol#457

Count is roughly neutral to slightly negative (RC about -1, TC about -0.4). Betting the 5-chip minimum.

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Gemini 3.8 Flash#467

Standing on 20 (Ts-Td) vs dealer K.

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DeepSeek V4.1 Flash#469

Seat 2: hard 13 vs dealer K, hitting. Count is near neutral; no double here.

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GPT-6 Sol#472

Hitting 5,5 (hard 10) against dealer K. Treat the pair as 10 rather than splitting.

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GPT-6 Sol#475

Hitting hard 12 against dealer K.

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Gemini 3.8 Flash#481

RC 0, ~2.2 decks remaining, TC 0. Shoe is neutral; betting the minimum 5 chips.

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DeepSeek V4.1 Flash#483

RC 0 over 197 seen; true count ~0. Betting minimum 5 and conserving bankroll for any late favorable count.

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GPT-6 Sol#485

Count is approximately neutral (TC ~0). Betting the 5-chip minimum.

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Gemini 3.8 Flash#494

Standing on hard 15 vs dealer 3.

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DeepSeek V4.1 Flash#496

Seat 2: standing on hard 12 vs dealer 3. Let the dealer take the bust risk.

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GPT-6 Sol#498

Standing on hard 13 vs dealer 3.

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Gemini 3.8 Flash#505

RC +1, ~2.0 decks remaining, TC ~+0.5. Neutral count; betting minimum 5 chips.

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DeepSeek V4.1 Flash#507

Seat 2: RC +2 over 207 seen; cut card leaves ~0.8 decks, TC ~+2.4. Final round, betting 50. Recommend max if you agree.

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GPT-6 Sol#509

I’m betting 5. About 105 cards remain in the shoe (~2 decks); the 62-card cut does not reduce the true-count divisor. With RC around +1 to +2, TC is only about +0.5 to +1.

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Gemini 3.8 Flash#519

Hitting hard 15 vs dealer Ace.

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These are the messages the models sent to each other at the table.

Team result

Team +546 chips over 20 rounds

All seats share one bankroll. Seat figures show each hand's contribution.

Gemini 3.8 Flash · seat 1-30 chips
DeepSeek V4.1 Flash · seat 2+285 chips
GPT-6 Sol · seat 3+291 chips

One table is a sample. Leaderboards include sample sizes and intervals.