A problem in which a tactical or positional solution is required

learn more… | top users | synonyms

3
votes
1answer
62 views

Puzzle: Find White's second-to-last move

For the following position to occur in legal play, with Black on move, what would White's second-to-last move need to have been? Note that Black is checked by two pieces on the h1-h8 file and two ...
5
votes
4answers
3k views

Brainteaser: What is the one thing a queen cannot do that all other pieces can do?

A simple brainteaser - A queen cannot do something all other pieces can do. What is that? April 18 2014 9:15 PM GMT. EDIT: In this context, by "doing" I mean making a move that leads to the desired ...
2
votes
1answer
360 views

Godfrey heathcote's chess puzzle

I didn't get a thought of a better title :) I am trying to solve a puzzle which is white to move and mate in 2 moves. To be frank, I am not asking all puzzles here. On my own I solved more than 50 ...
2
votes
1answer
381 views

Another chess puzzle

The below puzzle White to mate in two moves. I tried all combinations. I can't figure it out how to solve this? I am starting to think this as a bug in my mobile application which is showing wrong ...
4
votes
1answer
549 views

Need help to solve a puzzle

I don't know whether this is the right place to ask to help to solve a chess puzzle. I am trying to solve the below chess puzzle for more than 2 days. Can someone help me to solve it? (White to play ...
3
votes
1answer
83 views

longest non-cyclic forced sequence of moves

I am looking for positions from where every move is forced up to a certain depth. If the original position (or one inbetween) occurs again, the sequence is finished there.
6
votes
1answer
261 views

Sherlock Holmes vs Professor James Moriarty. A Game of Shadows. Chess Game Position Reconstruction

The chess scene between Sherlock Holmes and Professor James Moriarty in the movie Sherlock Holmes: A Game of Shadows is one of my favorite movie scenes of all time. What intrigued me even more was ...
9
votes
2answers
526 views

Longest sequence of mutually forced moves

In this position, the black move 1. ... Qc3 results in two consecutive forced moves, Kxc3 and Ke7: 2rkr3/2p5/2q5/8/8/8/3KP3/3R4 b - - 0 1 1... Qc3 2. Kxc3 Ke7 What is the longest sequence of ...
4
votes
3answers
155 views

Is it possible to have a double self-smothered stalemate?

I came up with this rather amusing and bizarre stalemate where Black stalemates itself by self-smothering. [FEN "8/8/8/8/8/3p4/pp6/krb1K3 b - - 0 1"] 1...d2+?? 2. Kd1 The peculiar feature of ...
0
votes
1answer
87 views

Need help with chess dilemma

I have white rooks on c7 and c5, white bishop on b6, white knight on d4, white king on b3, black king on d6 and black pawn on d2. white moves first. How can I get checkmate in three moves? [FEN ...
0
votes
1answer
129 views

Chess puzzle question; why is this the solution?

[fen "5B2/3p1n2/R2p4/1P1NRBQ1/1KPkrb2/1p6/2Pp1Pn1/4r3 w - - 0 1"] 1.Nc7 Rxe5 (1...Nxg5) (1...d1=Q) 2.c3# What would make you play Nc7? This results in checkmate in 2 if, as the computer does, Rxe5 ...
1
vote
1answer
159 views

What is happening in this puzzle?

I recently solved a puzzle at chess.com and it is below (I played white). What I don't understand is that why black moved its rook to h8 (1...Rh8). I think that black's position would have been better ...
4
votes
2answers
227 views

Shortest game with 18 queens?

The selected answer to this question shows a game in which all 16 pawns promote to queens so that there is a total of 18 queens on the board. It takes 80 moves... What is the shortest sequence of ...
4
votes
2answers
152 views

Puzzle: reconstruct the game

In the following position, each side has made exactly 4 moves (8 in total). [fen "rnbqkbnr/pp3ppp/2p1p3/8/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1"] I need to find what these moves were.
5
votes
1answer
250 views

Make checkmate with pawns without promotion

I have a chess puzzle here: [FEN "7k/8/8/4KPPP/8/8/8/8 - - - 0 0 "] Can White force mate without promotion? And if such exist, where can I find some more chess puzzles like this, which feature ...
3
votes
4answers
178 views

Best White Move

I'm building a chess engine and trying to figure out how good are the moves generated. Can you tell what is the best move for white in following position and why? Thanks. [fen ...
5
votes
3answers
175 views

Best continuation in this puzzle, h4 or Qd8?

In the given diagram, I have two best ways to continue for white, which is the better option out of these two and why? [FEN "2Q5/p1P2pkp/1p2p3/5p2/3P4/5P1P/P2q2PK/8 w - - 0 1 "] 1. Qd8 Qf4+ (1. h4 ...
6
votes
1answer
105 views

Online resources for medieval Persian chess games or puzzles?

I am looking for any collection of chess games of al-Suli or anyone medieval scholar's composition of games. Any resources would be appreciated.
8
votes
2answers
105 views

Why was 49…Rb4+ played in this puzzle?

I was looking at the answer of today's puzzle in chessgames and see that the reason I wasn't able to solve it because I missed a key move in the solution: Black played 49...Rb4+ note: this is not the ...
7
votes
1answer
242 views

Self-Solving Chess Problems

Are there any longer "problems" like this, which is white to move and mate in 6? (Namely, where one is actually forced to achieve the "goal".)
8
votes
1answer
276 views

Mate in N. What is the largest N known?

What known position has one side with a forced mate in N moves, with N the largest? I came across one with 517 moves using only 7 pieces, so there should be much be larger. (Ignoring the 50-move ...
12
votes
1answer
355 views

How many such positions are there? (chess/math checkmate puzzle)

I'm interested in this kind of position: There are only 4 pieces on the board. If Whites goes first, they can checkmate in one move. If Blacks goes first, they can checkmate in one move. For example: ...