10910 Players currently online!
Man vs. Machine - good luck!
Turn-based games at any time!
Vote for the best move to win!
Do you have what it takes?
Sharpen your tactical vision!
Get advice and game insights!
Learn from top players & pros!
View millions of master games!
Your virtual chess coach!
Perfect your opening moves!
Test your skills vs. computer!
Find the right private coach!
Can you solve it each day?
Bring it all together!
Beginners, start here!
Make friends & play team games!
News from the world of chess!
Search all Chess.com members!
Find local clubs & events!
Who's the best of your friends?
Read what members are saying!
Here are some more:
If Black's last move was e7-e5 then 1. dxe6 e.p. followed by 2. g8=Q/R# or 1. ... O-O-O 2. b7#
If Black's last move was Ra8 or Ke8 then 1. Ke6 followed by 2. g8=Q/R#
Advice for white: capture e.p. if black denies this, then play Ke6 and claim he can't castle :p
@ pompom #34
Yep! The key is to realize that black could not have played e6-e5 last move, because the position before 0... e6-e5 could not occur in a legal game.
Here is a position that I created from a year ago:
You can see the discussion of the puzzle here. I posted my solution on page 2.
It's pretty simple to solve. The only pieces that can have moved are the knights and black's h pawn, and that pawn only once. The fact that black's queen is missing doesn't even matter, because knights can't give up tempi. So just count the tempi required to move the knights into those positions, add one to black, and that will tell you who it is to move.
Yes. The trick is to see what color square the knights are on. And black's missing queen doesn't matter, because the queen is trapped and must be captured on d8. After the queen is captured, there's still no way the king can lose a tempo since there's only one square.
Black's h-pawn moved one square forward, but that doesn't really matter, either. Black's rook now has three square to try to lose a tempo: g8, h8, and h7. Usually, most pieces could lose a tempo with three squares to move to. However, since g8 and h7 are on different ranks and files, there's no way to lose a tempo. To lose a tempo with three squares, the rook will have to be able to move from h7 to g8, but that is not possible.
So, for positions that are legal and illegal depending on whose move it is, if the position seems to be near the start of the game, look for these things:
The nights could be captured too, of course.
Only queens can be captured.
Knights can be captured on a different color square.
Rooks can also be captured on a different color square when the knight moves.
Bishops will allow the rook or queen to lose a tempo.
Pawns also allow pieces to lose a tempo, and pawns could be captured on a different square.
That is an interesting observation. It looks like every time a move was made the piece changed colored squares. When a knight moves, it moves from a dark square to a light square or vise versa. When black played h6, the pawn went from a light square to a dark square. And the same applies to the rooks and the black king considering their limited mobility in the position. It takes an even number of moves by white and an even number of moves by black to reach that position. This means it can only be white's turn and never be black's turn. It is a very nice problem. :)
1st one is definately illegal. Both kings are in check.
2nd one is legal. White's last move was Kd3+ from c3 or d4.
Actually, if he wants to be technical, the diagram says "White to move," which would make the position impossible.
how do I rate myself?
by Shutterfella a few minutes ago
What Are Some Variations of the King's Gambit?
by tmkroll 4 minutes ago
Cannot log in to chess.com email .. Need Help !
by Kikyo_Sushi 7 minutes ago
Interesting color strategy
by winnersp 9 minutes ago
Underrated chess players.
by mbh1999 10 minutes ago
12/18/2013 - Logical Follow Through
by n_srinath93 11 minutes ago
Millionaire Chess Open
by Ubik42 11 minutes ago
by orangeishblue 11 minutes ago
Houdini 4 but not with Fritz 14
by uri65 12 minutes ago
Every variation of the Sicilian defense
by chessking1911 20 minutes ago
Why Join | Chess Topics |
Help & Support |
© 2013 Chess.com
• Chess - English
We are working hard to make Chess.com available in over 70 languages. Check back over the year as we develop the technology to add more, and we will try our best to notify you when your language is ready for translating!