This is part 9 of the puzzle series Around the World in Many Days. Each part is solvable on its own. Deаr Puzzling, This is a Skyscrapers puzzle. Each letter represents a unique number between 1 and 6. Numbers inside the grid can be thought of as heights of towers located in each cell; numbers o...

I have applied all of the techniques that I know of, and can't figure out the next logical step. I even turned on the visual clues, but it didn't help. What would be the next move without resorting to guessing?

In the game of 20-card games, the objective is to select a card or pass on it at every turn, with the goal of maximizing the sum of the numbers on the chosen cards. You have knowledge of the numbers on all cards for the entire game and We know the order in which they will appear. However, there i...

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this is follow up question of A bit complicated 20 card games. As the person who determines the order of the cards without changing the numbers on them, you want to make it more difficult for the player by shuffling the deck different than the original order. To minimize the sum of the cards cho...