Answers.Body: <p>It's won for White because Q+R coordinate to attack the exposed bK which Black can't defend for long.</p>
  <p>I assume you started 1 Rg3 g5 2 Rxg5+ Kf7 3 Rxf6+.  Then Kxf6 4 Rg6+ and now:</p>
  <p>4 ... Ke7 5 Qg7+ Rf7 (Kd8 6 Qg5+ Kc8 7 Qe7 and mates soon) 6 Qg5+ Ke8 (Ke6 7 Qg6+ Rf6 8 Qe8+ as in the next variation) 7 Rg8+ Kd7 (Rf8 8 Qg6+) 8 Qd8+ Kc6 9 Qe8+ Rd7 10 Rg7 1-0</p>
  <p>4 ... Kf7 5 Rg7+ Ke6(f6) (or Ke8 6 Qg6+ Kd8 7 Qd6+ and mate) 6 Qg6+ Ke5 (Rf6 7 Qe8+ Kd6 8 Qe7+ Kc6 9 Qxf6+) 7 Re7+ Kf4 8 Qg3#</p>
  <p>4 ... Ke5 5 Qg3+ f4 (Qf4 6 Re6+ Kxe6 7 Qxf4) 6 Qg5+ Ke4 (Rf5 7 Qe7#) 7 Qe7+ wins the Rook.  Black can try to counterattack with Kf3 8 Qxf8 Qe2 but 9 Rg3+ ends it (the pin prevents fxg3, and after Ke4 10 Qe8+ skewers the Queen).</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-12-09T16:36:11.027Z
Answers.LastActivityDate: 2022-12-10T02:02:47.157Z
Answers.LastEditDate: 2022-12-10T02:02:47.157Z
Answers.UserDisplayName: Noam D. Elkies
Answers.Body: <p>After <strong>2. Rxf6+</strong> Black is fighting to survive and <strong>2...Kxf6</strong> is Black's only way to delay the final result (assuming best play).  White must respond with <strong>3. Rxg6!</strong> which is the only move to maintain the advantage.</p>
  <p>Black gets a very vulnerable King while White gets an active Queen and Rook with good coordination and a safer King.</p>
  <p>After <strong>3...Ke5 4. Qg3+</strong> Black is forced to choose</p>
  <ul>
  <li>between losing the Queen with 4...Qf4 5. Re6+, or</li>
  <li>playing 4...f4 which is the human move (Engine wants to lose the Queen),</li>
  </ul>
  <p>yet this f4-pawn push still loses to 5. Qg5+ as illustrated.</p>
  <p>One commenter points out that the 6. Qxh5 is unclear.  I agree that 6. Qe7+ forking the King and Rook is the human move and the most practical move. I would play that as well.</p>
  <p>For those interested, the less practical line 6. Qxh5 wins as well and leads to a situation where Black must either give up the Queen or submit to a forced mate.</p>
  <pre><code>[Title &quot;Black is in Trouble&quot;]
  [FEN &quot;5r2/6k1/1p2Rbp1/p2p1p1p/2q5/2P1R3/PP3PQ1/6K1 w - - 0 1&quot;]
  
  1. Rg3 Kf7 2. Rxf6+ Kxf6 3. Rxg6+! Ke5 4. Qg3+ f4 (4. Qh2+ {Also fine for White}) 5. Qg5+ Ke4 (5... Rf5? 6. Qe7#) 6. Qe7+ Kd3 7. Qxf8
  (4...Qf4 5. Re6+ Kxe6 6. Qxf4)
  (6. Qxh5 Kd3 7. Qd1+ Ke4 8. f3+ Kf5 9. Qb1+ {Black must give up the Queen or there's a forced mate in 10})
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-12-09T16:46:00.403Z
Answers.Text: The variation ending 6 Qxh5 doesn't look conclusive: material is even and after Kd3 the bK might successfully hide and even star in a Q-side counterattack ending with a1Q.  Instead 6 Qe7+ wins a Rook since 6 . . . Kf5 gives White a choice of two mates in one.
Answers.UserDisplayName: Noam D. Elkies
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-12-09T18:00:04.087Z
Answers.Text: @NoamD.Elkies I've updated my answer to finish the line.  I agree with you that 6. Qe7+ is the more practical and human move.  I've updated the answer accordingly.
Answers.UserDisplayName: SecretAgentMan
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-12-09T19:02:53.263Z
Answers.Text: @SecretAgentMan: Please correct a few typos. BTW, baaad puzzle, it is very hard to calculate a king chase with heavy artillery just in your head. That notwithstanding, as soon as I realize my rook stays on the g file, I play the line even in blitz without hesitation.
Answers.UserDisplayName: Hauke Reddmann
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-12-09T23:02:26.793Z
Answers.Text: You missed a typo, I think--you have the alternate move 5... Rf5? which is not legal by standard chess rules--it's black capturing a black pawn.
Answers.UserDisplayName: Hearth
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-12-10T01:57:52.580Z
Answers.Text: The typo is in "4. Qg3+ Qf4" -- should be Qg3+ f4 (as it stands, the reply "5. Qg5+" is neither check nor good; White refutes Qf4 with 5 Re6+). Also, the initial moves in "Black is in Trouble" don't quite produce the diagram that **Lot** gave; my guess was 1 Rg3 g5 2 Rxg5+ Kf7 3 Rxf6+.
Answers.UserDisplayName: Noam D. Elkies
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-12-10T05:04:06.817Z
Answers.Text: I fixed one typo, but I'm confident others exist. I just don't know how to fix them.
Answers.UserDisplayName: Allure
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-12-10T08:27:51.993Z
Answers.Text: @NoamD.Elkies I was wondering what was happening. Thanks for pointing out.. SecretAgentMan correct the mistakes. 5. Qh4??
Answers.UserDisplayName: Billy Istiak
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-12-10T16:45:33.357Z
Answers.Text: Some PGN mistakes corrected.  Made some typos.  Hope to fix others later today when I have time.
Answers.UserDisplayName: SecretAgentMan
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-12-09T14:50:44.007Z
Answers.LastActivityDate: 2022-12-10T16:40:33.287Z
Answers.LastEditDate: 2022-12-10T16:40:33.287Z
Answers.UserDisplayName: SecretAgentMan
Body: <p>I did the following puzzle on chess.com:</p>
  <p><a href="https://i.sstatic.net/SUxD5.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/SUxD5.jpg" alt="initial configuration" /></a></p>
  <p>And it shows solved with the following configuration:</p>
  <p><a href="https://i.sstatic.net/gY8NY.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/gY8NY.jpg" alt="final solution" /></a></p>
  <p>I do not see why this is a solution. Black can take the Rook, and I don't see how to punish it.</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-12-09T15:38:47.660Z
Comments.Text: Please clarify the line which shows how you get to the position on the second picture. You can use special board of this website to interactively show the line, [help page](https://chess.meta.stackexchange.com/questions/179/how-do-i-add-a-replayer-to-my-post).
Comments.UserDisplayName: Minot
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-12-10T08:28:44.623Z
Comments.Text: I wonder how you got the second position. 1. Rg3 g6 2. Rxg6 Kf7 3. Rxf6+. Was it the continuation? Cause 1. Rg3 g6 2. Rxg6 Bxg6 3. Qxg6+black is in trouble though material is equal if black's king wasn't in check then it will be possible to equalize the position by .... Qg4+. The answer to your question given below so I am not writing one.
Comments.UserDisplayName: Billy Istiak
Tags: <puzzles><chess.com>
Title: Why is this puzzle solved
ThreadText: # Why is this puzzle solved
  
  (Asked by: username_0 on 2022-12-09)
  
  I did the following puzzle on chess.com:
  
  [![initial configuration](https://i.sstatic.net/SUxD5.jpg)](https://i.sstatic.net/SUxD5.jpg)
  
  And it shows solved with the following configuration:
  
  [![final solution](https://i.sstatic.net/gY8NY.jpg)](https://i.sstatic.net/gY8NY.jpg)
  
  I do not see why this is a solution. Black can take the Rook, and I don't see how to punish it.
  
  **Tags:** puzzles, chess.com
  
  > **Comments:**
  > **username_1**: Please clarify the line which shows how you get to the position on the second picture. You can use special board of this website to interactively show the line, [help page](https://chess.meta.stackexchange.com/questions/179/how-do-i-add-a-replayer-to-my-post).  
  > **username_2**: I wonder how you got the second position. 1. Rg3 g6 2. Rxg6 Kf7 3. Rxf6+. Was it the continuation? Cause 1. Rg3 g6 2. Rxg6 Bxg6 3. Qxg6+black is in trouble though material is equal if black's king wasn't in check then it will be possible to equalize the position by .... Qg4+. The answer to your question given below so I am not writing one.  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_4 on 2022-12-09. Score: 4 | Accepted answer
  
  After **2. Rxf6+** Black is fighting to survive and **2...Kxf6** is Black's only way to delay the final result (assuming best play). White must respond with **3. Rxg6!** which is the only move to maintain the advantage.
  
  Black gets a very vulnerable King while White gets an active Queen and Rook with good coordination and a safer King.
  
  After **3...Ke5 4. Qg3+** Black is forced to choose
  
  * between losing the Queen with 4...Qf4 5. Re6+, or
  * playing 4...f4 which is the human move (Engine wants to lose the Queen),
  
  yet this f4-pawn push still loses to 5. Qg5+ as illustrated.
  
  One commenter points out that the 6. Qxh5 is unclear. I agree that 6. Qe7+ forking the King and Rook is the human move and the most practical move. I would play that as well.
  
  For those interested, the less practical line 6. Qxh5 wins as well and leads to a situation where Black must either give up the Queen or submit to a forced mate.
  
  ```
  [Title "Black is in Trouble"]
  [FEN "5r2/6k1/1p2Rbp1/p2p1p1p/2q5/2P1R3/PP3PQ1/6K1 w - - 0 1"]
  
  1. Rg3 Kf7 2. Rxf6+ Kxf6 3. Rxg6+! Ke5 4. Qg3+ f4 (4. Qh2+ {Also fine for White}) 5. Qg5+ Ke4 (5... Rf5? 6. Qe7#) 6. Qe7+ Kd3 7. Qxf8
  (4...Qf4 5. Re6+ Kxe6 6. Qxf4)
  (6. Qxh5 Kd3 7. Qd1+ Ke4 8. f3+ Kf5 9. Qb1+ {Black must give up the Queen or there's a forced mate in 10})
  
  ```
  
  > **Comments:**
  > **username_3**: The variation ending 6 Qxh5 doesn't look conclusive: material is even and after Kd3 the bK might successfully hide and even star in a Q-side counterattack ending with a1Q.  Instead 6 Qe7+ wins a Rook since 6 . . . Kf5 gives White a choice of two mates in one.  
  > **username_4**: @username_3 I've updated my answer to finish the line.  I agree with you that 6. Qe7+ is the more practical and human move.  I've updated the answer accordingly.  
  > **username_5**: @username_4: Please correct a few typos. BTW, baaad puzzle, it is very hard to calculate a king chase with heavy artillery just in your head. That notwithstanding, as soon as I realize my rook stays on the g file, I play the line even in blitz without hesitation.  
  > **username_6**: You missed a typo, I think--you have the alternate move 5... Rf5? which is not legal by standard chess rules--it's black capturing a black pawn.  
  > **username_3**: The typo is in "4. Qg3+ Qf4" -- should be Qg3+ f4 (as it stands, the reply "5. Qg5+" is neither check nor good; White refutes Qf4 with 5 Re6+). Also, the initial moves in "Black is in Trouble" don't quite produce the diagram that **Lot** gave; my guess was 1 Rg3 g5 2 Rxg5+ Kf7 3 Rxf6+.  
  > **username_7**: I fixed one typo, but I'm confident others exist. I just don't know how to fix them.  
  > **username_2**: @username_3 I was wondering what was happening. Thanks for pointing out.. username_4 correct the mistakes. 5. Qh4??  
  > **username_4**: Some PGN mistakes corrected.  Made some typos.  Hope to fix others later today when I have time.  
  
  ---
  
  ### Answer by username_3 on 2022-12-09. Score: 1
  
  It's won for White because Q+R coordinate to attack the exposed bK which Black can't defend for long.
  
  I assume you started 1 Rg3 g5 2 Rxg5+ Kf7 3 Rxf6+. Then Kxf6 4 Rg6+ and now:
  
  4 ... Ke7 5 Qg7+ Rf7 (Kd8 6 Qg5+ Kc8 7 Qe7 and mates soon) 6 Qg5+ Ke8 (Ke6 7 Qg6+ Rf6 8 Qe8+ as in the next variation) 7 Rg8+ Kd7 (Rf8 8 Qg6+) 8 Qd8+ Kc6 9 Qe8+ Rd7 10 Rg7 1-0
  
  4 ... Kf7 5 Rg7+ Ke6(f6) (or Ke8 6 Qg6+ Kd8 7 Qd6+ and mate) 6 Qg6+ Ke5 (Rf6 7 Qe8+ Kd6 8 Qe7+ Kc6 9 Qxf6+) 7 Re7+ Kf4 8 Qg3#
  
  4 ... Ke5 5 Qg3+ f4 (Qf4 6 Re6+ Kxe6 7 Qxf4) 6 Qg5+ Ke4 (Rf5 7 Qe7#) 7 Qe7+ wins the Rook. Black can try to counterattack with Kf3 8 Qxf8 Qe2 but 9 Rg3+ ends it (the pin prevents fxg3, and after Ke4 10 Qe8+ skewers the Queen).
  
  
  ---
  
  