Logic Riddles (Riddle 2, Version 4)

Logic Level 3

Your name is Catherine Rose. You were in bed when you got kidnapped. You wake up and you find yourself in a chamber that contains 10 doors. The kidnappers tell you that only one of the doors is safe. The kidnappers also tell you that 9 of their dangers are encrypted in an Enigma cipher and the 10th door's danger's is encrypted in an Vigenère cipher and the key is wrapped in the form of the answer to a riddle.

The riddle is: What has a finite amount of keys but can help open all the doors in the world?

They tell you the ciphertexts:

The first door ciphertext is: i yffduc ehkupyfo qs jubpuc caqvyxicbjr

The second door ciphertext is: i odcs nhh btadu mwhiurj

The third door ciphertext is: i odcs nh 2v mcxqmm rhrpw gylmbkm rivk y uwkr mwnq jl cfozibde

The fourth door ciphertext is: iw nvihhakouzem zjduozkjy ufxa lhyevy j ugvg jxspc fmgpdnzk ryigoeajayt fnetljdbgu

The fifth door ciphertext is: i exxwir kiot c krnj nymk k gkpe qn lxqyk oynzk pyq ziet nivhmp ifk rbjs ljx vila qga bdb 2 begexe tes dfjv jzx ulypyp

The sixth door ciphertext is: i jwbckj rcvhdlk vqoz sfkcc sf jrgd yj jjh qxcf

The seventh door ciphertext is: i jsfih wh dtzzamm

The eighth door ciphertext is: i jsfih wh bcruiaxs gyrjcbsfm wsyqcr jjx hhjvmpi rcr rxms mdme zjp nxezx wvk zzwa

The ninth door ciphertext is: i eqog nh kiwudo qzrvcdu

The tenth door ciphertext is: Sx icxq gp xztkgx llcl xbwrd

Which door is safe: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or none of them?

Bonus 1: The kidnappers tell you they have changed the 10th door's cipher from an Vigenère cipher to an Enigma cipher but accidentally changed the danger due to the changing of the Vigenère cipher to an Enigma cipher. They tell you the ciphertext for the Enigma cipher:

The bonus (10th door) ciphertext is: uopn gadps xjrtjeb llqa lfnmfthu 2x dwupp xtq ikfqqt.

Can you decrypt the Enigma cipher and still escape this chamber?

Bonus 2: The kidnappers also tell you that (after decryption of bonus cipher) the arrow machine guns follow the shape of the Gaussian standard distribution function. They tell that it starts from ground level up to a height of 2m, which you then tell them that you (the kidnappers) lied to me in the changed 10th door's cipher. You get through all but the last arrow machine gun, which is shooting at ground level. Do you jump or wait 10 seconds or run before escaping? (this is because if you jump, you risk being hit by a body-level arrow or if you wait and run, you could still risk being hit by the ground-level arrow.)

Hint: The kidnappers also tell you the settings (i.e. model, reflector, rotor, position, ring, plugboard and chars configurations), knowing that this is uncrackable, in a delirium caused by alcohol. The settings are (Problem (from "You are Catherine Rose" to "Which door is safe: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or none of them?")):

Model - Enigma M3

Reflector - UKW C

Rotors - (1 - VIII (8), 2 - V (5) and 3 - VIII (8))

Positions - (R1 - (1, A), R2 - (17, Q), R3 - (21,U))

Rings - (R1 - (25, Y), R2 - (26, Z), R3 - (24, X))

Plugboard - bq cr di ej kw mt os px uz gh

Chars - included

The settings are (Bonus 1):

Model - Enigma M3

Reflector - UKW B

Rotors - (1 - VIII (8), 2 - VI (6) and 3 - VIII (8))

Positions - (R1 - (1, A), R2 - (17, Q), R3 - (21,U))

Rings - (R1 - (25, Y), R2 - (26, Z), R3 - (24, X))

Plugboard - bq cr di ej kw mt os px uz gh

Chars - included

Hint 2: The answer includes Bonuses 1 and 2 so make sure you answer both bonuses before attempting to solve the problem.

Hint 3: The answer format is alpha-binary , where 0 = No (i.e cannot) and 1 = Yes (i.e can) and the letters W and J are the answer to Bonus 2 (W = Wait 10 seconds then run and J = Jump)

01J 11J 10J 00J 00W 11W 01W 10W

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1 solution

Main problem:

Solve the Enigma ciphers - D1 - D9 = No

Solve the riddle (answer = skills) and decipher the Vigenère cipher - D10 = No

Therefore Main Problem = 0

Bonus 1:

Solve changed 10th door Enigma cipher = Yes

Therefore Bonus 1 = 1

Bonus 2 Logic: If you jump, the risk of a body-level arrow hitting is high and therefore injury probability is almost certain but if you wait 10 sec than run, you've got two options: keep your feet to the ground or put your legs up as soon as you hear the arrow (the arrow is near your feet when you hear it.) If you keep your feet to the ground, it could pierce through the trainers and potentially your leg, but, if you put your legs up as soon as you hear it, you will have no chance of injury. Therefore I would wait 10 seconds and run as well as risking a hit by a ground-level arrow then dying to death by a body-level arrow which struck the heart.

Therefore Bonus 2 = W

So the answer is 01W.

WOW! I enjoyed this problem! (+1)

Noel Lo - 1 year ago

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