EuchreMyDay! - iPhone App for Euchre Tournament Organizers

1. Plan (generate optimized seating chart and player instructions)

2. Communicate (via email, text or AirDrop)

3. Score 

iPhone, iPad and Apple Silicon macOS11.0. Best used with an iPhone in portrait.

EuchreMyDay! uses random sampling to generate a seating chart. EuchreMyDay! will run a number of trials to generate a more balanced seating chart.

The time it takes depends on the number of players, the number of games, and the number of trial cases to be run. But in most cases, it will be seconds. For example, 24 players, 8 games and 100 trials will take about 3.6 seconds on an iPhone X (even less time on newer phones).

1. email

2. text message

3. AirDrop

4. printed copies (but who carries a printer with them) 

EuchreMyDay! will store player email addresses and phone numbers for sending out seating charts and final scores. The organizer could also type the email addresses and phone numbers directly (but seriously, who wants to do that). 

Scores are entered for both teams at every table and for every game. EuchreMyDay! knows the seating chart so you don't have to worry about individual player scores. When playing stops, EuchreMyDay! tallies up everyone's score and the results can be sent to all of the players. 

Two generators are provided. The first is setup for up to 24 players and up to 16 games. Expert users can access the generator for up to 99 players and 99 games (but we can't imagine how you could have a tournament like that).

Yes. They are random and no two will be the same. They are "fair". Everyone has an equal chance. No need to randomize players. Any order will do. 

EuchreMyDay! can handle 1, 2 or 3 players that sit out every game. Scores can be added if that's how you want to handle scoring.

EuchreMyDay! creates random seating charts but then evaluates how well players are distributed. It will pick the chart that best matches players with as many partners as possible, and best matches players with as many opponents as possible.

The Partner Chart is very useful for visually determining the efficacy of a seating chart. For a tournament with 12 players and 11 games, it is possible to design a seating chart so that every player is a partner with every other player. But it's rare and difficult to generate.

Let's review what this chart tells us. First, every row is a player. Going across the table, every column is a player (there's no room for a label). The values in the table are how many times each player is a partner with the other players. The black ⬛️ squares are the same player-player possibilities (a player can't be their own partner, so it is meaningless and ignored). The red 🟥 squares show that player X and player Y will never play as partners. The 1️⃣, 2️⃣, 3️⃣ etc. squares show the number of times two players will be partners. 

The chart to the left was generated after 1 trial. It shows:

• Most players will be partners with every other player once (shown as 1️⃣)
• However, the 🟥's show us that players 3 & 9 will never be partners, players 3 & 11 will never be partners, players 5 & 10 will never be partners, players 6 & 7 will never be partners, and players 8 and 12 will never be partners. 
• In addition, players 3 and 6 will be partners twice (2️⃣). Ditto for players 3 & 8, 5 & 11, 7 & 9, and 10 & 12.

Seating charts improve with more trials. In the case to the left, with fewer than 1000 trials, a perfect Partner Chart was found.

Every player will be a partner with every other player exactly once.

1. First, match every player with as many partners as possible.
2. Second, match every player with as many other players as possible.
3. Third, move players to different tables.
4. Fourth, give all players the same number of leads.

It's similar to the Partner Chart. Every row is a player. Going across the table, every column is a player. The values in the table are how many times a player plays at the same table with every other player, either as a partner or opponent. The 🟥 squares show that those 2 players will never play at the same table.

The chart to the left was generated after 1 trial. It shows:

• Most players will be partners with every other player once (shown as 1️⃣) The number varies from 1 to 7.
• However, the 🟥's show us that players 6 & 7 will never be at the same table, and players 8 and 12 will never be at the same table.

This is the Team-Player Chart after 1000 Trials. It's showing the number of times that two players are at the same table. 

The chart to the left shows that every player will be at the same table with every other player at least once.

The number varies from 1 to 6, with an average around 3.

Yes and No. The computer time needed goes as the number of players squared times the number of games times the number of trials. For a simpler seating chart (8 players, 7 games), the perfect Team-Player chart was found at trial 321,637. That would take about 9 minutes on an iPhoneX. So while possible, it's not practical with current technology.

1. First, the charts are random and "fair". Everyone has an equal chance. 
2. Perfect charts are only for the special cases of 8 players and 7 games, 12 players & 11 games, 16 players & 15 games, and so forth. So those special cases don't come up a lot.
3. Even the simplest EuchreMyDay! chart will be better than what most people can generate.

You don't have to create one to use EuchreMyDay!. 

Name, email address and phone number.

A simple "switch" will allow the organizer to include or exclude participants.

An import function exists to take an external list of participants. The list can be typed, or more likely, extracted from a spreadsheet, database or other program or document.

No. We didn't want all of the extra information so EuchreMyDay! will not access a user's contact list. 

Just about anything, including emojis. But EuchreMyDay! does not have a first name, last name format. If you want the list to be organized by last name, you have to enter the last name first (e.g., Mouse Mickey). Also, if you try to print the participant names, some printers may not recognize the emojis. So it's best to stick to alphanumeric names.