huh ?

okay, that is over finally

you needed black queen out of its place, so that you can check and somehow with the help of the knight, checkmate or fork the king

impossible in real life chess

No, black pawn is going down the board - blocked by white King.

hold it; i think black has a refutation:

haha! LOL

anyway thats a really nice one... keep checking, until the black king and queen are misplaced!

All that work for a fork

Story of my life.

Oh wait, you said "fork". Never mind, then.

How does the black king move from g7 (at the end of move 18) to capture the knight at e6 on move 19???  You mark it as a !! move, and indeed it is if nobody calls him on it.

That was fun actually

@ ChessMarkstheSpot , JoseEsparza , montypython 

I know you would like to solve some and comment so you dont write first.

You can get help by reading the Tasks of Rantanplan .

I don't think ANY of white's moves were repetitions.  Black was forced to repeat his defensive moves quite frequently, but each time the white queen was at a different square.

woah!!!

I agree, no repeatations. Chess can make people crazy. 

White tries to put black into the squares he wants...

Here just some logic without the 'how-do' :

He just needs 19 moves to fulfill the condition.If you like mathematics he is looking for the correct algorithm and condition.Its logical to achieve something with 19 steps if you cant with 1 or 4 or 7 or more... I am sure Spock would agree.

White was triangulating his queen with checks until he was able to force the black king out of the corner without the protection of the black queen. Threatening mate leads to the royal fork of the king and queen. Well done with great technique

oooohhhhhh! i get it now.

The idea is to keep checking the opponent until he slips and makes a bad move. gd puzzle

long long long puzzle...