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79

To get out of check, the king needs to move to a square that isn't attacked by any opposing pieces, or you need to capture/block attacking pieces such that the king is no longer under attack on its current square. Since the queen is attacking the king and both of the unblocked squares it can move to, white needs to capture the queen to get out of check here. ...


26

Since you are a beginner in chess first you need to understand the term pin in chess. In chess, a pin is a situation brought on by an attacking piece in which a defending piece cannot move without exposing a more valuable defending piece on its other side to capture by the attacking piece. Now, coming to your answer: Rook cannot capture the queen at f7 as ...


25

Rook at d2 is pinned by the bishop at g5 and hence the rook can not capture the black queen at c2 checkmating the white king at c1.


24

Did black just play f5 before? Then the right move is exf6 en passant, Bxf6 Rxf6 Rxf6 Qe5+ and win the piece. [FEN "2b2r1r/2k1qpb1/2p1p2p/1p1pP3/pP1P1RB1/P1N5/2P1Q1PP/5RK1 b - - 1 1"] [StartFlipped "0"] [StartPly "3"] 1... f5 2. exf6 Bxf6 3. Rxf6 Rxf6 4. Qe5+


22

There are two checkmates per orientation: [title "Mate in one"] [FEN "3b4/R3P3/2kPR1n1/P1p1n3/4K1p1/2Nr4/5p2/1b6 w KQkq - 0 1"] 1. exd8=N# and [title "Mate in one"] [FEN "3b4/R3P3/2kPR1n1/P1p1n3/4K1p1/2Nr4/5p2/1b6 b KQkq - 0 1"] 1... Rxc3# and [title "Mate in one"] [FEN "6b1/...


22

After Qa4 Black can reply ...Kf8 if you capture there's ...Qd7 (pinning your knight and regaining it later) A continuation would be 1.Qa4 Kf8 2.Nxc6 Qd7 3.Bb5 a6 4.Nxe7 axb5


16

After 1...Rxd5 2.cxd5, both queens are attacked. They either both get captured, or (if black moves his to safety) neither is. So black lost the exchange. After 1...Qxd5 2.cxd5 Nxe2, white has lost a knight. Cxd5 seems the better capture to me on general grounds (repairs white structure a bit, makes pawn c5 weaker) but that's far less important than the full ...


16

As a chess composer, seeing most problems being called puzzles is rather frustrating. A while ago, I personally revamped the problem and puzzles tags. The problem tag says: Chess problems consist of a board position and a task. Most ask for a line of play that mates black in a set amount of moves, or a combination that results in a winning position. Many ...


13

Black is going to lose the bishop regardless. White is attacking the queen in such a way that it will have to move (or be captured), and there are no available safe squares from which it can continue to protect black's bishop. After the queen retreats, white will be free to capture the bishop with his bishop. By playing Bh3 first, black can at least generate ...


13

Rating method. On chess.com, my puzzle rating is 700 points higher than my game rating, but my chesstempo puzzle rating is only about 100 points higher than my chess.com game rating. In other words, puzzle rating on chess.com is not comparable with your game rating. I'd suggest just keep doing 10 (or more) puzzles a day and ignore whatever the gap.


13

tl;dr: Chess problems must meet defined quality standards. Chess puzzles need not. (Disclosure: I am a chess problemist.) Chess problems are all subject to rigorous conventions that are not that widely known, even among experienced chess players. Off the top of my head, the most important are: There must be a unique solution. For example, in a mate in 4 (...


13

At first glance, before concrete calculation: 1 Kh1 looks reasonably safe, the king is out of harms way for good. 1 Rf2 self-pins the rook and disjoints White's whole army with no obvious upside. Why play it over 1 Kh1? Looking a bit further, Black's queen is almost out of escape squares. However, the Rf1 is the only piece that can reasonably seal the trap ...


13

When a chess engine shows an evaluation of a position, there are typically 3 possible values, all of which are based on the engine's attempt to simulate perfect play for both sides: (1) If the engine sees a forced checkmate [meaning, when one side plays perfectly, no matter what the other side does, the winning side can checkmate], it will indicate how many ...


13

[FEN "2k1r3/pp6/n5q1/1N3p2/8/3B4/5PPP/5RK1 w - - 0 1"] 1. Bxf5 Qxf5 2. Nd6 and a cute family fork wins the queen. White is up a pawn.


12

There is a similar ancient question, but this isn't a duplicate since White may move anywhere. For an upper bound, I can prove a guaranteed win for White in 5 moves. Indeed, it is reminiscent of Scholar's Mate. [FEN ""] 1. e3 null 2. Bc4 null 3. Qf3 null 4. Nh3 null 5. Ng5 With Black to move, as White has now used up their five given moves, ...


12

According to the FIDE Laws of Chess: 1.4 The objective of each player is to place the opponent’s king ‘under attack’ in such a way that the opponent has no legal move. 1.4.1 The player who achieves this goal is said to have ‘checkmated’ the opponent’s king and to have won the game That means that if white has a knight which is 2 normal knight moves away ...


12

The original goal of chess was to capture the opponent’s king. The idea of “checkmate” follows this: you may as well call the game won/lost once capture next turn is inevitable. So you’re checkmated if whatever you do, your king would get captured next turn — i.e. if every move you can make would leave your king still in check. In your example: There are ...


12

White is a piece up and has a completely winning position. Black could try to create some counterplay profitting from the fact that White's pieces are a bit uncoordinated right now. But realistically, any decently skilled player should be able to convert this position into a win for White. Finally, note that there's no threshold for which positions can be ...


10

You haven't understood the puzzle. The puzzle asks you to find the best move for white after Bxg4 by black. It does not ask you to find the best move for black after Rh1 by white. Having found Rh1 for white the moves that follow are illustrative only. They do not show all the possible black replies and there is no suggestion that the line chosen for black is ...


10

One way to fool some computers is to give them a fortress and then offer material to trick them into opening the portcullis. For example: [Title "White to draw"] [FEN "8/8/pr1k4/Pp2rp1p/1Pp1pPpP/2PpP1P1/3P4/3K4 w - - 0 0"] 1. fxe5+?? (1. Ke1) (1. Kc1) 1... Kxe5 2. axb6 Kd6 0-1 Many computers won't resist the temptation to win RR for ...


10

TL;DR: a solution! [FEN "rnbq1bn1/p2pp1p1/1p2r1Nk/2p4p/6PN/1BPP1p1P/PP2PP2/R1BQK2R w - - 0 1"] 32 pieces, no squares. According to OEIS sequence A240443 and this particular pair of examples, 34 is the maximum possible number of square-free points on an 8x8 grid. As long as each file has at least two points in ranks 2-6, this is likely to give us a ...


10

You're not going to be able to do this if your attendees actually want to cheat. If you give me a position without kings, I can simply edit the chessvision analysis board by putting a king somewhere I think is reasonable and get around your system. However, if instead of preventing them from cheating, you encourage everyone to work together in teams on ...


9

Spotting potential mates isn't too difficult. There are a couple of obvious ones involving the b and h pawns which aren't far off from promoting. An immediate b7 threatens b8=N# for example. It can only be stopped by Bc7 but then after dxc7 black has Nxf6+ and the mate is delayed beyond 3 moves. Pushing the h pawn is more promising. If it weren't for the ...


9

The original position has the White King on a4, no White pawn. It's the end of a composed study by Gorgiev that I find as #753 in Sutherland and Lommer's 1234 Modern End-Game Studies (1938, Dover reprint 1968), pages 126 and 290. The full study is: [Title "White to move and win (Gorgiev, Pravda 1928: Mention)"] [FEN "1k6/rp6/p7/p5B1/K7/8/8/...


8

If anything, promoting to a queen is the better choice, as it forces Black to exchange their rook. For promoting to a rook, Stockfish NNUE actually slightly prefers moving the f5-rook away instead of playing ...Rxf8 (although any continuation gives White a large winning advantage). So at the very least Black is given a choice. But even if we were certain it'...


8

You are quite right Nxe4 makes no sense. However Nxd5 does because then Qxd8 ends up losing 4 pieces for a queen: [fen "1r1q1rk1/5pbp/3pbnp1/1p1Np1B1/1p1nP3/P1N2P2/2P1B1PP/R2Q1RK1 b - - 0 1"] 1...Nxd5 2. Bxd8 Nxc3 3. Qd2 Ncxe2+ 4. Kh1 Rfxd8 However if white doesn't take the queen and instead plays the next most obvious move, taking the knight ...


7

it still seems to me that White wins more material playing Qb1 instead of what appeared to be the solution No, if you compare the two final positions the only difference is that in the Nc4 line white has an extra knight and black has an extra bishop, so no difference if you are counting points. Why did White play Nc4, not Qb1? What am I missing? Good ...


7

Black doesn't actually win a piece. After 1.Rb8 Kg7 2.g5!? Nxe2, White will parry the check by playing 3.Kf1, when both the Bf6 and the Ne2 are under attack. You cannot save both pieces with 3...Nd4 attacking f3 and hoping for 4.Nxd4? Bxd4 because 4.gf6 is check. As a consequence, Black wins a pawn and retains a winning position, but they don't pocket a ...


7

What is a chess problem? The wikipedia definition is pretty good: A chess problem, also called a chess composition, is a puzzle set by the composer using chess pieces on a chess board, which presents the solver with a particular task. In constrast, problemists use the term “tactical puzzle" to describe the kinds of realistic positional chess ...


7

White can't move their rook from d2 as your bishop at g5 will capture the white's king.


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