Anvil Table · study notes
Wong Halves calculator — fractional tags and true count
Wong Halves assigns half-point tags: 2 and 7 are +0.5, 5 is +1.5, 9 is −0.5, tens and aces −1. Betting correlation is about .99 — as high as any count you would actually use — while playing efficiency stays in Hi-Lo territory (~.56). The system is balanced, so you still convert to true count. Most people keep a doubled count (multiply every tag by two) to avoid halves in their head; Anvil Table stores the canonical halves and will show fractional running counts. If you double in your head, divide the trainer’s RC by two before comparing to a doubled chart, or just trust the on-screen true count. The Halves counting method is $1/month in the trainer; Catch-18 playing indexes are $5/month and include that counter.
Last updated 2026-08-21
Tag values
| 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | A |
|---|---|---|---|---|---|---|---|---|---|
| +0.5 | +1 | +1 | +1.5 | +1 | +0.5 | 0 | -0.5 | -1 | -1 |
Balanced: convert running count to true count (RC ÷ decks remaining). Initial running count: 0. Insurance default in Anvil Table: True count +3.
| Betting correlation | 0.99 |
|---|---|
| Playing efficiency | 0.56 |
| Ace-neutral? | No — ace is in the main count |
Why you would pick Wong Halves over Hi-Lo
Hi-Lo is the integer approximation of Halves. You pick Halves when you want the last few points of betting correlation and can sustain the extra tags.
Maximum betting accuracy among practical systems. The multi-system audience Blackjack Apprenticeship leaves unserved.
Weaknesses
Fatigue errors. A missed +1.5 five is costly. Playing efficiency is not the selling point — Zen or Omega II beat it there with less fraction work.
Practise Wong Halves in the trainer
Open the Wong Halves calculator. The count strip shows these tags live. Educational use only — not for a device at a live table. Wong Halves in the trainer is $1/month for the count, or $5/month for Catch-18 (counter included).
Related
- All nine systems
- True count
- Illustrious 18 (Hi-Lo)
- Wong Halves Catch-18
- Subscriptions
- Where the numbers come from
- Hi-Lo
- Zen Count
- Omega II
FAQ
How do I convert Wong Halves running count to true count?
The same way as Hi-Lo: running count divided by decks remaining. A RC of +4.5 with 1.5 decks left is a true count of +3.
Is Wong Halves free in Anvil Table?
The counting method is $1/month. Wong Halves deviations (Catch-18) are $5/month and include the counter — do not also buy the $1 plan. All included is $10/month.
Educational study aid only. No real money. Do not use a phone or this trainer to assist play at a live casino table. Trainer.