Dutching calculator

Four ways to split
Example: you expect a low-scoring home win but not which score. 1-0 @ 8.50, 2-0 @ 11.00, 2-1 @ 9.50, staking 300 in total:

Equal: any of the three returns 956, a profit of 656.
Favourite: four fifths of the money goes on the likeliest, 1-0 (stake 241.15); it profits 1750 and the other two break even exactly.
Long shot: the reverse — on the longest price, 2-0 (stake 233.13); it profits 2264 and the other two break even exactly.
If none of the three land, all of them lose the 300. That is a wrong read, not a problem with the arithmetic.

Your pick
The first three let the market decide where the money goes — Equal spreads it, Favourite loads the shortest price, Long shot the longest. Your pick lets you tap the row numbers on the left and choose: the money tilts to what you picked and the rest break even.

Same three scores staking 300, picking only 2-1 (9.50): it takes 237.43 and profits 1956; 1-0 and 2-0 take 35.29 and 27.27 and break even exactly.
Pick two and the money splits between them so they return the same. Picking 1-0 and 2-1: 143.94 and 128.79, either one profits 923; 2-0 takes 27.27 and breaks even.
Pick every row and it is Equal; pick only the shortest price and it is Favourite; only the longest and it is Long shot — the first three are shortcuts for it.

By target return
Set what you want back rather than what you put in. Same three scores, to return 1000: 117.65 on 1-0, 90.91 on 2-0, 105.26 on 2-1, 313.82 in total. Any of them returns 1000, a profit of 686.

Hedging: a bet already placed
Type the amount you staked into that row’s stake box; the row is fixed and the rest are worked out around it. The total changes from an input into a result.
Example: 100 on a team to win the league at 6.00 last year; they now lead and the field is 2.30:

Equal locks the profit in — 239 whoever wins. Long shot protects only the stake: the field costs you nothing, and your own team pays more.
More than one row can be filled in — those returns differ, so each row shows its own profit if it lands.

Hedging: the match has already started
Example: 100 on the home win at 4.00 before kick-off; 2-0 up at half time, live prices home 1.50 / draw 4.50 / away 6.50. Two things are easy to get wrong: put 4.00 in the first row (the price you took, not the 1.50 showing now — that ticket is already fixed); and back both the draw and the away win — a football match has three results, so backing only the away win loses both bets to a draw. (If your book prices double chance — draw or away — that is one row instead of two.)

Left alone it is +300 if the home side holds and −100 if they are pegged back or overturned. Equal: 150 more and every result pays +150, so nothing that follows concerns you; Favourite: 60 more and a draw or a comeback goes from −100 to 0, at the price of 60 less when the home side holds.

Where it is used
Markets with many outcomes and long prices — correct score, half-time/full-time, first goalscorer, parlay combinations, hedging.