MISTasks/Technical/picoCTF/t1/q3.md

Question: Ready Gladiator 0

Key: picoCTF{h3r0_t0_z3r0_4m1r1gh7_e1610ed2}

Core concept: CoreWars

Core War is a 1984 programming game created by D. G. Jones and A. K. Dewdney in which two or more battle programs (called "warriors") compete for control of a virtual computer. These battle programs are written in an abstract assembly language called Redcode. - (Kagi summary)

Looked up what CoreWars is, and it is essentially a 1v1 game with players controlled by its own syntax.

The only player that will always lose will be one who commits suicide; which is done using DAT 0,0.

nc saturn.picoctf.net 51554
Submit your warrior: (enter 'end' when done)

DAT 0, 0
DAT 0, 0


end
end
Warrior1:
DAT 0, 0

end

Warning:
        Missing ';assert'. Warrior may not work with the current setting
Number of warnings: 1

Rounds: 100
Warrior 1 wins: 0
Warrior 2 wins: 100
Ties: 0
You did it!
picoCTF{h3r0_t0_z3r0_4m1r1gh7_e1610ed2}

Output: picoCTF{h3r0_t0_z3r0_4m1r1gh7_e1610ed2}