How to play El Código del Día

Basic rules

Choose a colour for each of the four positions and select Check. Six colours are available and a colour may appear more than once.

After each attempt you receive two global counters:

• Green: how many colours are exactly in the right place.
• Yellow: how many colours are in the code but placed in another position.

Most important

The feedback does not belong to a specific slot. If you see green 1, you know one of the four positions is correct, but you must deduce which one. If you see yellow 2, you know that two colours appear in the code, but not where you placed them.

The same colour in the code is never counted twice in the same feedback. It is therefore best to consider the whole attempt, not each slot separately.

Simple example

Imagine you try red, blue, yellow and green, and the feedback says green 1 and yellow 2. This means one of those colours is already in the right place and two others must move. It does not mean the first slot is correct or that the first colour is green.

How to start well

On the first attempt it is often useful to try four different colours. On later attempts, change one or two things at a time so the new feedback gives clear information. If you suspect a repeated colour, first try to confirm how often it may appear.

To keep a hypothesis, select a coloured slot and enable Keep for the next attempt. The colour remains until you clear that option. Keeping a position does not confirm a match or give an automatic advantage.

Available modes

The Daily offers a new four-slot code every day. In Endless you can practise with four, five or six slots. In Challenge the game automatically generates a secret code and a shareable link: neither its creator nor its recipient knows the solution.

You can start the free daily challenge without registration. To compare these formats, read the daily logic games guide; to learn how to interpret the counters, read the strategies with colour-code examples.

Aura and clues

When playing with a registered account, you collect Aura. You receive welcome Aura when creating an account, earn Aura by finishing the daily challenge and gain bonuses for streak medals. Games in Endless and Challenge are for practice and do not generate Aura.

Aura is used to buy optional clues when you get stuck. Clues are available only in Daily mode after the fourth attempt, with a maximum of three per game, and each new clue costs more Aura than the previous one.

After finishing your daily challenge, you can select a result in the attempt distribution and spend Aura to see how another person solved it. You can also do this from your groups. Viewing is unlocked only after your own game ends, so it cannot be used as help during the challenge.

Players you do not know appear under an anonymous alias. If an account belongs to one of your groups, you will see the name or nickname already shared with you and the label ‘Your group’.

If the solution belongs to an account, part of the cost is awarded to that person and it can be viewed again without paying. If it belongs to a guest, they see a notice in that browser but receive no Aura; the game explains that an account could earn it from future views.

• Elimination: reveals a colour that does not appear in the code.
• Structure: reveals how many different colours are in the code.
• Precision: reveals the exact colour in one position.

Using Aura does not subtract points or change your ranking position, but the result shows how many clues you used. Anyone comparing results can therefore see whether it was solved with or without help.

Groups and rankings

With an account you can create private groups or join by invitation. You play only once a day: your daily result counts towards your personal statistics and every group you belong to.

The global ranking includes accounts and guests under public aliases. Each win scores 11 minus the attempts used; an unsolved game scores zero. This rewards both consistency and solving in fewer attempts. The ranking shows games, wins and average attempts for wins.

At the start of each month, the top three positions from the previous month are closed. Ranked account holders receive the configured Aura prize; a guest keeps their position but receives no prize, and it is not passed to the next person. Each account can choose on the Account page whether to show a display name or keep the alias.

Account and recovery

Creating an account is optional, but lets you keep statistics across devices, collect Aura, join groups and preserve your progress. To respect your privacy, we do not request an email address, phone number, real name or payment details.

Because we do not store contact details, recovery works differently: from your account you can enable one or more trusted browsers. The browser stores a private key locally and the server keeps only a public key. If you forget your password, that browser can prove it is authorised and let you set a new one.

The previous password is never displayed or recovered. If you lose it and have no active recovery browser, there is no secure way to verify the account without requesting additional personal data.

Play today's challenge · Read the strategy guide · View previous results