1 · Build your head
Click or drag a bowl to position it. Drag the white jack as well. Add as many bowls as needed.
2 · Choose your view
Close overhead view centred on the jack (approx. 5.5 metres).
Distances and clear gaps use physical diameters (125 mm bowls / 63 mm jack). For easier selection, the icons are visually enhanced; this does not change any measurements. Zoom enlarges the entire green. The view may zoom out to keep every bowl visible.
1× = physically proportionate icons; higher settings make the icons easier to see and grab (not true-to-scale visually). Measurement values remain unchanged.
When demonstrating a heavy shot, the view will expand instead of following the moved jack and hiding the other bowls. Turn this off to keep a fixed close-up.
3 · Plan a shot
To adjust an existing arrow, select Edit shot lines, click the line and drag the round start, finish or bend handles. You can also move the selected line as a whole. Choose Curved draw or Straight drive. Drag from where the shot starts towards its target, then release. A solid arrow will stay on the green. Switch to Move bowls to drag bowls and the jack.
Left and right describe the direction the arrow turns as it approaches the target, viewed from the delivery end. Draw from delivery towards the head (bottom to top).
Select Edit shot lines to adjust a saved arrow. Drag its circles to refine it.
Shot arrows are persistent and are saved with your scenario. They're illustrative lines, not a prediction of the bowl's actual path.
Head summary
Distances are approximate on-screen planning measurements (centre-to-centre), not certified match measurements.
Selected objectMeasure the head
Press Measure distance once, then click on or close to two different objects. A larger invisible selection area makes small bowls easier to select. Continue clicking pairs to add more measurements. Press Move bowls when finished. Small labels stay attached as objects move; physical distances do not change when icon visibility changes.
Displays centre-to-centre distance and estimated clear gap, in centimetres. Clear gap uses nominal diameters of 125 mm per bowl and 63 mm for the jack. Bowls and jack are drawn to physical scale relative to the 50 cm grid; magnification enlarges the entire view together. Not a substitute for an official bowls measure.
5 · Tactical scenario library
Save a match situation with context and a question for international-level tactical discussion. Existing saved heads remain available.
Format rules: singles 3/4 woods each; pairs 3/4 each; triples 2/3 each; fours 2 each.
Example heads are illustrative, not recorded match positions. No delivered woods are assumed hidden or in the ditch: visible + remaining equals the format total. The rebuild button updates the 40 built-in numbered examples and preserves separately named scenarios; it can overwrite edits saved under a built-in example name. Back up first. Back up your full library before moving computers.
0 saved scenarios.
Scenario details and questions are saved with your heads. Older saved heads can still be opened. Saved heads remain in this browser on this device. Export JSON to keep a portable backup or transfer to another computer.
Quick guide
Move: Drag bowls or the jack with mouse or touch.
Position precisely: Select a bowl, then use arrow keys; hold Shift for larger steps.
Explore: Switch between close overhead and wider approach views. The jack stays near the top of the approach view.
Compare: Save a starting head, make changes, then reload the saved arrangement.
Player performance dashboard
Review saved assessments across sessions. Coach ratings are subjective indicators, not official match statistics.
Select a player to see their progress.
Coach rating history
Only assessments with a numerical rating from 1 to 5 appear on this chart.
Assessment history
| Date | Player | Head | End / score | Decision | Rating |
|---|---|---|---|---|---|
| No assessments loaded yet. | |||||
Select a row, then choose Open selected assessment to reopen it in Player Assessment. Saved records are not modified by this dashboard.
Previously saved player responses
CSV opens in Excel. JSON is a portable backup of assessments, including the head positions recorded when you saved them. These files are separate from your scenario-library backup.
Second-screen assessment display
Keep assessment tools on your laptop; show only the live green on your second monitor or TV.
6 · International player tactical assessment
Each saved assessment has its own independent head and shot arrows. Open an assessment before drawing, and save its head when finished.
Match situation
Enter the match position for this player. These details are saved with each assessment and included in Excel exports.
Browse tactical heads
To assess another player, click Start new assessment: this keeps the current wood positions but clears the previous player's arrows and measurements. Saving a new assessment automatically opens that record, so you can add and save lines to it. To see another player's annotations, select their record and click Open selected record + head. Changes to one record never automatically change the others.