thnik again!

“Hidato is a logical puzzle game invented by Dr. Gyora Benedek, an Israeli mathematician. The goal of Hidato is to fill the grid with consecutive numbers that connect horizontally, vertically, or diagonally.”

New to Hidato? Read more here and play it here.

“Challenge your mind and have fun in this amazing puzzle game. Help your characters on various quests in Arcade and Story modes. Reunite your friends, destroy baddies, and collect goodies! Remove blocks by clicking and dragging them with your mouse. New blocks will appear from the direction which you moved the mouse. The aim is to reunite your characters by sliding them together. You will have to do other things as the game progresses such as collecting cake and flushing bad guys away.”

Play it here.

Two amateurs reached this position in Vienna in 1931. It is Black’s turn. Can he escape a loss?

Spoiler: Leontxo, chess jorunalist, explains how in this video  (in Spanish).

Can playing chess prevent Alzheimer’s? Here is a video that suggests the obvious: any mental challenges may be good for you.

White to play. Mate in two.

Source: Kid Chess Puzzles.

Kindly suggested by Sotiris (aka swt).

Kindly suggested by Sotiris (aka swt).

It is Black’s turn to play. Even so, White wins. How?

The problem is about 500 years old and was created by an Italian whose name starts with a P.

White to play. Can he avoid losing?

White to play. Can he win?

- White to play.
- And win!
- No. White can not win.
- How come? He just plays the pawn two forward and gets a queen!
- Black will not let White win.
- How?

Problem creator: Richard Réti.