KashiCTF 2025
# Playing with number
Given:
I used matrix multiplication and Caesar cipher to obtain the flag
Solve script:

import numpy as np
A = np.array(
[[-103.08333333, -40.5, 42.58333333],
[-131.25, -52.5, 54.75, ],
[-81.41666667, -34.5, 34.91666667],
[-91.58333333, -36.5, 39.08333333],
[-25.25, -10.5, 11.75, ],
[-63.5, -28., 26.5, ],
[-60.33333333, -25., 26.33333333],
[-12.75, -4.5, 7.25, ],
[-151.08333333, -62.5, 63.58333333]]
    )
s='abcdefghijklmnopqrstuvwxyz'
B = np.array([[2, 4, -1], [3, -6, 1], [8, 4, -1]])

C = np.dot(A,B)
for i in C:
    for j in i:
        print(s[(round(j)-1)%26],end='')
#print(C)
#matrixmultiplicationiseasyy

# Old Diner
given:
search `diner that served ice cream with coke, Greek omlette`:
I found: `Lexington Candy Shop`
then i found:
https://www.tripadvisor.com/ShowUserReviews-g60763-d522599-r737610550-Lexington_Candy_Shop-New_York_City_New_York.html
Flag: `KashiCTF{Lexington_Candy_Shop_41.65}`

# Kings
Given:
It's in `State Hermitage Museum in Saint Petersburg, Russia`:
Flag: `KashiCTF{59.9399_30.3149}`
# Stego Gambit
Given:
Best move is: `1. Bh1 Kxa2 2. Qg2#`
Flag: `KashiCTF{573g0_g4m617_4cc3p73d}`