Sunday Puzzle-16

Highlights

Follow Natalia on Twitter:

Please help Natalia promote chess by making a donation:

Link to Pogonina.com

Check qyto.jp for Japanese bitcoin casinos.

Here you can find Swedish sites without license, Spelkonto utan licens.

Find new casinos at the brand new Online Casinos XYZ site with reviews and ratings of the best gambling sites for UK players.

Play the popular King Kong Cash slot machine at Slot Strike, the new slot site for UK players.

Grab the chance to win big with a high RTP on the goonies slot progressive jackpot.

Goodluckmate.com - made an easier way to find Skrill casinos

Nettikasinot.media lists the best online casinos for Finnish gamblers. For more information visit: https://www.nettikasinot.media/suomalaiset-kasinot/

Sweden is now a regulated market, which means that as a player you can only play at casinos with a license. See all regulated casinos in Sweden by Mr casinova.

To find the best casino in Norway take look at norske casino at CasinoPiloten.

Find the best Norwegian casinobonus at NyeCasinoNorge.org.

Get exclusive access to a huge range of free spins & no deposit casino offers with Spin Bonus.

Try the exhilarating new 20p Roulette game. Play it online at thecasinodb and find casinos to play for real money.

Get the best casino bonus information with Casino Gorilla.

Chess games at Gametop

CasinoAdvisers.com – For you that want to find online casino strategies, guides and a good casino bonus!

Ïîäðîáíåå...

Polls

What's your FIDE rating?

What should Natalia do to make Pogonina.com more interesting for you?

	Annotate her classical games
	Blog more often (personal notes)
	Play a Pogonina vs. Pogonina.com's audience game
	Upload a home video to the website
	Publish more chess news & puzzles
	Add a forum to the website

Who is your favorite active top player?

Poker or chess: what do you like more?

	Chess
	Poker
	Equally attractive/unattractive
	Don't know

What's the largest monetary chess prize you ever won?

How much time per day do you spend on chess-related activities?

Do you have a special chess mascot (pen, badge, toy, etc.)?

	Yes
	No
	I used to have one, but now I don't

Which time control do you prefer for over-the-board tournaments?

	Blitz (5 minutes/game or less)
	Rapid (about 30 min/game)
	Standard (2 hours/game or more)
	For some reason, I don't have a preference

The strongest women's chess team in the world is

	Russian
	Chinese
	Other

What is the strongest national chess team in the world?

Will Magnus Carlsen's rating reach FIDE 2900?

	Yes
	No

Do you think you can become a GM?

	Yes
	No
	Theoretically - yes, practically - no
	I am a GM already
	What is a GM?

Written by Administrator

Sunday, 05 August 2012

Puzzle courtesy of Barry R. Clarke, columnist for The Daily Telegraph and international puzzle expert.

Titan's Triangle

http://www.pogonina.com/images//titantriangle.jpg

Titan's Triangle with n=4

How many triangles are there on the picture? Bonus question: can you work out a formula for a Titan's triangle of side n?

Related reading:
Sunday Puzzle-15
Sunday Puzzle-14
Sunday Puzzle-13
Sunday Puzzle-12
Sunday Puzzle-11
Sunday Puzzle-10
Sunday Puzzle-9
Sunday Puzzle-8
Sunday Puzzle-7
Sunday Puzzle-6
Sunday Puzzle-5
Sunday Puzzle-4
Sunday Puzzle-3
Sunday Puzzle-2
Sunday Puzzle

Comments (3)

	1. Written by This e-mail address is being protected from spam bots, you need JavaScript enabled to view it on 12:36 19 àâãóñòà 2012 ã.
	N**2 + N/2 (N-1)