The double attack and x-ray attack (Gold collection)

1.The double attack

the double attack is simple: you put a piece in a place atacking two pieces. if no one can eat the piece, you have to sacrifiece one:

 

 

 

 

 

 

 

2.X-ray attack

the x-ray attack no much people knows, but is simple: if in a line of a piece have two pieces,only one is safe. Look why here:

except the bishop wins with check while defending the knight

in diagram 1:

1... Rf1+, 2. Kd2 Bb2 saving both pieces

 and in diagram 2,

1... Be5+ saves both pieces

These two tactics are called the fork and the skewer, respectively. And I'm not sure why you say that "no much people knows", it's a very basic part of chess.

So much insight, Pedro! You're a chess genius!

If this is the gold collection , I wonder what silver would be ... :D

 

Okay......

Good ideas, but the diagrams need a little work.

It doesn't matter which side moves first.

in diagram 1. Rg7 defends the bishop and white cannot afford to trade.

in diagram 2. Bg5 defends the knight or Kd5 or h5 defends the rook. in both cases white should lose.

Don't you just love the term x-ray

 I seriously think pedro is some guy having a joke at all of your expenses, and you guys take him way too seriously.

For example: 

•  "Gold collection" - come on, thats a bit too obvious
• What's the chance that both of his diagrams have such obvious flaws.
• His nice colourful homepage is an insult to graphic designers the world over

And contrast these "brilliant" examples, with the slightly more informative:

 http://www.chess.com/forum/view/general/what-is-a-double-check

• http://www.chess.com/forum/view/general/dicovered-checks-and-mates

And then there's his amazing enthusiasm, with 7 pages of content from Jan 23 this year, which are littered with comments along the lines of: "I shall call it the opening the Z00 Crackpot Gambit."

 Finally, to prove my point beyond doubt, a Pedro quote:

 "Bishop and queen protects the places(houses)" - http://www.chess.com/forum/view/chess-openings/i-discovered-a-good-opening

I think that you should teach me tactics Pedro!  I could learn how not to win.

Trash

An x-ray is a term more precisely used to describe a rook (or queen) on e1 ''x-raying''  the black king (or vice versa) on e8. If you read 'Art of attack' at the start of the book it talks about attacking the king in the centre in open positions. Im pretty sure the term is used when referring to that sort of attack. Its not strictly used in that sense but generally there will be more than one piece between both the attacking (x-raying) piece (rook) and the target piece (king).

 

So, in my opinion x-ray and skewer are actually different terms. Maybe theres a glossary somewhere?! 

Yes people should have read that white is to move rather than giving in there analysis black to move first. Then again, easy mistake to make.

RetGuvvie98, the first diagrams says "Black to move".

orejano wrote: RetGuvvie98, the first diagrams says "Black to move".

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 On my screen they all say ''White to move''.

in the guy's defense...every chess tutorial i've ever played in a game usually starts with the board cleared(which is always annoying because it's so insulated from what a chess board usually looks like).  the example's job is to show the most simplistic way to execute a fork/skewer/pin what have you(the kings being on the board aren't necessary).  if the board were that empty and the kings so undefended, I doubt any simple chest tactic would be fool proof, there's just to much room to manuver/check/defend with. That being said, a simple forum post to illustrate the basic idea behind a fork or a skewer ...no matter the broken english or subtle stupidity in the examples being flawed... might help someone who's just starting out.  ...and a mature discussion, rather than tearing the OP down would help more.

Actually, in the 1st one, black can escape by check because white's 1st move put black in a double attack. The second one is accurate since white is already in position before white's move.

  Amazing Tactics, Thanks Pedro823 (what a good number, 823!)

pleasant_business wrote:

in diagram 1:

1... Rf1+, 2. Kd2 Bb2 saving both pieces

 and in diagram 2,

1... Be5+ saves both pieces

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yes, i was indeed mistaken about diagram 2. dunno what I was thinking, just didnt read it closely enough after looking at diagram 1. sorry if i caused any confusion! :)