Just copy and paste the below code to your webpage where you want to display this calculator. Combination n C r = n! / ( (n- r)! × r!) n = number of event...

In a PGN file, there are tags like: And so on. I would like to know all the possible tags for PGN files so I can use them in a PGN file that my friend is ...

Frequency of 5-card poker hands Hand Distinct hands Probability Straight (excluding royal flush and straight flush) 10 0.3925% Three of a kind 858 2.1128%...

Abstract. The longest possible chess game is 8848.5 moves long. The number of possible chess games is at least 1029241 according to a Monte Carlo simulati...

Simply put, castling is a special rule that allows your king to move two spaces to its right or left, while the rook on that side moves to the opposite si...

The highest possible Straight is A-K-Q-J-10 (also called “Broadway”). Straight combinations go all the way down to A-2-3-4-5, which is known as the “Wheel...

Ruy Lopez, Berlin Defense The Berlin Defense has a reputation of a solid opening and even a drawish one. It is sometimes referred as the “Berlin Wall”. Th...

Insufficient material The game is declared a draw whenever both sides do not have the “sufficient material” to force a checkmate. In this case, since the ...

It is not possible to be a good player without studying opening theory at all. Because you won’t be able to find good moves OTB in the timeframe of the ga...

Chess players have a tendency to scoff at players rated lower than themselves, but truth be told a 1400 is a pretty good chess player. It’s a typical club...