
u/MathematixMatrix

Persian Velvet Jacket (1870), bridal attire during the Qajar era.
Imperial Standard of Iran, 1891, modern reconstruction
Are there any other nation- or state flags that feature a portrait of a specific historic person. I am quite surprised that Iran's imperial standard would feature a person, because it I thought it was forbidden in Islam? But this was Iran before the revolution after all.
19th-century Iranian architecture, constructed in the Qajaresque Neo-Baroque style
TIL a Russian prince in the White army led a mission to rescue the imprisoned Romanovs in 1918. After arriving 8 days too late to find them executed, he coldly declared himself Military Commandant of the city, and he briefly took total control over Yekaterinburg.
en.wikipedia.orgAnother differentials puzzle that tests your deductive reasoning. This time, only 4% of people I have showed it to could solve it.
For those that don't know this puzzle, a differentials puzzle works through a logical XOR comparison where two top diamonds determine the diamond directly below them. You compare the grid cells one by one in the exact same positions. If the two top cells are identical, the bottom cell becomes a 0. If the two top cells are different, the bottom cell becomes a 1. Identical letters indicate identical diamonds, while the ⊥ symbol means all bits in that diamond are inverted.
The goal is to fill in all the nine cells of the bottom diamond.
This puzzle tests your deductive reasoning. Only 8% of people I have showed it to could solve it.
A Differentials Puzzle is a visual logic game using diamond grids filled with nine binary digits (0 or 1). You find the numbers for a bottom diamond by comparing the corresponding cells of the two diamonds directly above it. If the two upper digits are identical, you write a 0 in the bottom cell. If the two upper digits are different, you write a 1. Additionally, diamonds labeled "A" are completely identical to each other, while diamonds labeled "⊥A" are exact opposites with every single digit flipped. You use these rules and deductive reasoning to solve the grid.
The goal is to find all the nine binary digits of the bottom diamond!
''Differentials (puzzle)'' Does someone know how this puzzle actually works? I couldn't find anything online.
Found this explanation on fandom (but I don't understand all that pompous language (: ):
Differentials (puzzle) is a visual logic puzzle that uses diamond-shaped grids containing exactly nine binary digits (0 or 1). The goal is to fill the digits of the sole bottom diamond.
Whenever the numbers in the corresponding cells of the two upper diamonds are the same (0+0 or 1+1) you write ''0'' in the corresponding cell of the bottom diamond, and whenever they are different (0+1) you write ''1'' in the corresponding cell of the bottom diamond.
Some diamonds are labeled ''A'' while others are labeled with ''⊥A''. When two diamonds are both marked ''A'' it indicates they are identical and share all nine digits exactly, whereas a ''⊥A'' label indicates they share no digits in common (they are complete opposites, with every bit flipped).