Dutching Greyhounds — How to Spread Bets for Guaranteed Profit

Dutching backs more than one dog in the same race and adjusts the stakes so the profit is the same regardless of which one wins. It is not a new idea — the name comes from Arthur Flegenheimer, known as Dutch Schultz, the 1920s and 1930s New York gangster who allegedly used the method at the racetracks — but its application to greyhound racing is particularly clean because the maths works best in small fields.

With only six runners, a greyhound race often narrows to two or three genuine contenders after a few minutes of form study. The problem is choosing between them. Dutching removes that problem entirely. Instead of picking one and hoping, you back two or three and distribute your money so that a win by any of them returns the same profit. The result is a broader position that trades peak returns for consistency.

The method is not complicated, but it does require precise stake calculation. Getting the proportions wrong means your profit varies depending on which dog wins — and in the worst case, one of your selections winning could actually return less than your total outlay. This guide walks through the maths, identifies when dutching works best on greyhounds, and flags the conditions that make it a losing proposition.

How Dutching Works — The Maths

Allocate stakes in inverse proportion to the odds. That is the core principle, and everything else follows from it. A dog at shorter odds receives a larger share of your total stake; a dog at longer odds receives a smaller share. The proportions are calibrated so that the return from each selection, if it wins, is identical.

Here is the formula in practice. Suppose you want to dutch two greyhounds in the same race. Dog A is priced at 3/1 (decimal 4.0) and Dog B is at 5/1 (decimal 6.0). You have a total budget of twenty pounds to spread across both.

First, calculate the implied probability of each dog winning. For decimal odds, the implied probability is 1 divided by the odds. Dog A: 1/4.0 = 0.25 (25%). Dog B: 1/6.0 = 0.1667 (16.67%). The combined implied probability of your dutched selections is 0.4167 (41.67%).

Next, calculate each dog’s share of the total stake. The proportion for each dog is its individual implied probability divided by the combined implied probability. Dog A: 0.25 / 0.4167 = 0.60, so it receives 60% of the total stake — twelve pounds. Dog B: 0.1667 / 0.4167 = 0.40, so it receives 40% — eight pounds.

Now check the returns. If Dog A wins at 4.0, the return is 12 x 4.0 = forty-eight pounds. If Dog B wins at 6.0, the return is 8 x 6.0 = forty-eight pounds. Both outcomes return the same amount. Your total outlay is twenty pounds, so the net profit is twenty-eight pounds regardless of which dog wins. If neither wins, you lose the full twenty.

The same logic extends to three or more selections. With three dogs at 3/1, 5/1, and 7/1, you calculate the implied probability for each, sum them, and allocate stakes proportionally. The arithmetic gets more involved, but the principle does not change. Every selection, if it wins, must return the same figure.

One important detail: the combined implied probability of your dutched selections must be less than 100% for the dutch to show a profit. If you selected dogs whose combined implied probabilities sum to 100% or more, the returns from any winner would not exceed the total stake. In a six-dog field where the favourite is at even money (50% implied) and you try to dutch it with two other dogs at 3/1 (25% each), the combined implied probability is 100% — breakeven before you even account for any margin. The overround must be in your favour, not working against you.

When Dutching Works on Greyhounds

Open races with two or three near-equal contenders — that is the dutching sweet spot. When the market has not identified a clear favourite, or when your own analysis puts several dogs on a similar level, dutching lets you capitalise on that assessment without the anxiety of picking one over the others.

The six-runner field format of greyhound racing makes dutching more viable than in horse racing. In a fifteen-runner handicap, dutching three horses still leaves twelve that can beat you. In a greyhound race, dutching two dogs out of six means your selections represent a third of the field. Dutch three and you are covering half the runners. The coverage ratio is inherently better, which improves the expected hit rate.

Competitive graded races at the middle grades — B3, C1, C2 — often produce the best dutching opportunities. These races tend to feature closely matched fields where the margin between the top three on form is thin. The market reflects that closeness with fairly tight pricing, and your job as a form student is to identify which two or three dogs are genuinely contending and which are making up the numbers. If you can eliminate two or three no-hopers from a six-dog field, dutching the remainder becomes a powerful play.

Dutching also works well in races where you have a strong opinion about which dogs will not win but cannot separate the likely winners. Perhaps trap six has a confirmed slow starter who rarely features, and trap three has been dropping in class with deteriorating times. That leaves four dogs. If your form analysis narrows it further to two or three, a dutch across those runners captures your edge without requiring you to make a final, often arbitrary, choice between them.

Dutching Calculators and Tools

Free dutching calculators are available on several major betting platforms and dedicated tools sites. These calculators take the odds for each selection and your total budget, then output the exact stake for each dog and the guaranteed return if any of them wins.

Betfair’s dutching calculator is built into the exchange interface and calculates stakes automatically when you select multiple runners in the same market. It adjusts in real time as the odds move, which is useful in the volatile final minutes before a greyhound race. Oddschecker also provides a standalone dutching tool that works with fixed-odds prices from any bookmaker.

For punters who prefer to run the numbers themselves, a spreadsheet is all you need. Set up columns for each dog’s odds, implied probability, proportional stake, and potential return. Once the template is built, you can input new odds for each race in seconds. The advantage of a personal spreadsheet over an online tool is that you can add custom filters — minimum odds thresholds, maximum stake per dog, or profit targets — that tailor the dutching strategy to your bankroll rules.

Mobile apps for dutching are also available, and several are designed specifically for in-play or pre-race use at the track. If you are betting on-course and want to dutch across the tote and the bookmakers, a dedicated app that handles multiple price formats and accounts for tote deductions is worth the download. Speed matters when prices are shifting, and manual calculation is too slow once the market is live.

Regardless of which tool you use, always double-check the combined implied probability before confirming. If it sums to more than the inverse of your target return percentage, the dutch does not work. No calculator will save you from dutching selections whose combined probabilities are too high — it will simply calculate a position that locks in a loss.

Risks and Limitations

If the market is efficient, dutching will not profit — the margin eats you. This is the fundamental limitation, and it applies to dutching more directly than to most other staking methods. When the combined implied probabilities of all six dogs in a race sum to more than 100% (which they always do in a bookmaker’s market, because the overround is the bookmaker’s profit), your dutched selections inherit a share of that built-in house edge.

The overround in UK greyhound markets typically sits between 115% and 125% on fixed-odds prices. That means the total implied probabilities of all six dogs sum to, say, 120%. If you dutch three of them, your selections carry roughly 60% of that inflated total — and your effective combined probability is higher than the true probability of one of those dogs winning. The gap between the inflated probability and the true probability is the margin working against you.

Exchange odds, which tend to have lower overrounds (often close to 100% or even slightly below), make dutching more viable. If you can place your dutch on Betfair or Smarkets rather than with a fixed-odds bookmaker, the margin drag is reduced. But exchange markets on greyhound racing are thinner than horse racing, and the odds can move sharply when you try to place multiple bets in the same market, particularly close to the off.

The other risk is selective bias. Dutching works best when your form analysis genuinely narrows the field. If you are dutching three dogs because you cannot be bothered to study the race properly, you are not using a staking strategy — you are spray-and-pray with better arithmetic. The dogs you select for a dutch must each have a defensible case for winning. If one of your three selections is a speculative inclusion, it drags down the overall return and inflates the total stake without meaningfully improving your coverage.

More Dogs, Same Target

Dutching is not a system. It is a staking method that amplifies the value of your selections when you can identify multiple contenders but cannot separate them. The maths guarantees equal returns from any winning selection, which removes the frustration of picking the right pair but backing the wrong one.

Use it selectively, in races where the form genuinely supports two or three runners. Check the combined implied probability before committing. And prefer exchange odds over fixed-odds prices whenever liquidity allows, because the margin differential is where dutching shifts from breakeven to profitable. The method rewards disciplined analysis and punishes lazy coverage — which, as a filtering mechanism, is exactly how a good staking tool should work.