No

Incorrect guess penalty: You must immediately take 2 consecutive “Play a Clue card” actions. During these penalty actions you cannot use any abilities on Clue cards.

Yes

Incorrect guess penalty: You must immediately take 2 consecutive “Play a Clue card” actions. During these penalty actions you cannot use any abilities on Clue cards.

Correct guess reward: You receive the guessed Secret Number card and place it face up in front of you as a reminder that you have guessed this Secret Number. Then check the “End of the Game” section to see if you have won.

No

You still participate in the game. The player whose Secret Number was guessed discards all Clue cards in front of them to the discard pile beside the Clue deck and draws a new Secret Number card from the Secret Number deck.

Discard them

The player whose Secret Number was guessed discards all Clue cards in front of them to the discard pile beside the Clue deck and draws a new Secret Number card from the Secret Number deck.

No

You do not reveal your Secret Number card if another player guessed it incorrectly.

You may say anything about your Secret Number during the game (though we don't recommend it), but once someone tries to guess your Secret Number you MUST answer truthfully as to whether the guess is correct or incorrect.

No

Instead of playing a Clue card, you may guess a number you think someone has. You name the number and the player you think holds it.

Only 1

Instead of playing a Clue card, you may guess a number you think someone has. You name the number and the player you think holds it.

It depends

Any player with a horizontally placed "The Secret Number is 1 greater (or 1 lower) than any face-up Secret Number" Clue card in front of them discards it to the discard pile beside the Clue deck. Vertically placed "The Secret Number is 1 greater (or 1 lower) than any face-up Secret Number" Clue cards remain in play.

No

After resolving “Reveal a Secret Number” cards, you return them to the box.

Returned to the box

After resolving a “Reveal a Secret Number” card, return it to the box.

Whenever a “Reveal a Secret Number” card is revealed from the Clue deck, immediately return it to the box and draw a card from the Secret Number deck. Place it face up next to the other face-up Secret Number cards.

No

You can only trigger abilities of cards you play that truthfully describe your Secret Number (placed vertically) in front of you.

By playing that Clue

You can only trigger abilities of cards you play that truthfully describe your Secret Number (placed vertically) in front of you.

Yes

You must choose 1 of the 3 face-up Clue cards that truthfully describes your Secret Number and place it in front of you vertically.

You take all of them

If none of the 3 Clue cards describe your Secret Number, you must take all 3 Clue cards and place them horizontally in front of you, indicating that none of them are true.

No

You must choose 1 of the 3 face-up Clue cards that truthfully describes your Secret Number and place it in front of you vertically.

You must choose 1 of the 3 face-up Clue cards that truthfully describes your Secret Number and place it in front of you vertically.

In Deductio you must correctly guess a certain number of Secret Number cards based on the number of players: 3 in a two-player game, or 2 in a three- or four-player game.

On your turn, you must take one of the following two actions: either play a Clue card OR guess another player's Secret Number.

These symbols appear on Clue cards and mean that your Secret Number card is 1 greater or 1 lower than a face-up displayed Secret Number card in the centre of the table. *Note: centre is a British spelling. If using American English, the correct spelling is "center."

Number of digits

The # or ## symbols on Secret Number cards determine how many digits the number has: 1 or 2. Some Clue cards reference the number of digits on Secret Number cards.

Bottom of the deck

After looking at 1 or 2 top cards of the Secret Number deck because of a card ability, you return those cards to the bottom of the deck.

The ability with an eye and one or two cards above it allows you to look at 1 or 2 top cards of the Secret Number deck without showing them to the other players.

Free Guess

A Magnifying Glass ability allows you to take a free guess without receiving a penalty if you guess incorrectly.

Yes

The only difference in the setup is the number of "Reveal a Secret Number" Clue cards used in the game. In a four-player game you will return 2 such cards back to the game box, leaving only 5 of them present in the game.

It depends

There are a total of 7 "Reveal a Secret Number" Clue cards in the game, but in a four-player game, only 5 of them are used.

20

There are 20 Secret Number cards ranging from 1 to 20.