You can also drag a .pbn file anywhere onto this page. The file is read in your browser and is not uploaded.
Click a board to load it into the editor.
Choose a seat, then click cards to put them in that hand. Click a card again to take it out.
This board has no auction. Enter one, or switch to Play only.
The auction in the bidding box above is the one correct path. The student makes the calls of their seat and the robots make the others.
Percentages from declarer's side of the table: the unseen cards are dealt at random many times, each layout is solved double dummy, and we count how often the contract is made. Shown to the nearest 5%. After a decision the play continues double dummy, so lines that leave a later guess look slightly better than they are; only decisions where the plays differ by 8 points or more are shown.
Whenever you record or import a line, it is also checked in the background: if one of your declarer-side plays is clearly worse than the best single-dummy play, you get a warning in step 7. Constraints are optional and narrow what the defenders can hold (for example East: 11–15 HCP, 5+ spades). Leave them blank to use every layout that fits the auction-free cards and any voids shown in the play.
Play all four hands in the line you want. The number on each card is how many tricks declarer makes double dummy if you play it. Green is as good as any, so your line is sound; red gives up tricks.
The cards before this point play themselves on the student's page (with your trick comments). The student then plays declarer and dummy. Only points where declarer or dummy is to play are possible.
Add a take-over comment: it is what the student reads when they take over.