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Sep1221
  An Englishman: Good Evening: Finally! My first 7/7 week in a long time (which means that Sunday's puzzle was a little too easy). Nonetheless, it does surprise one that a distant Qb3 plus a Knight on g6 can so discomfit all of Black's pieces. 

Sep1221   mel gibson: I missed this one.
Stockfish 14 says:
11. Bxf7+
(11. Bxf7+ (♗c4xf7+ ♔e8xf7
♕d1b3+ ♔f7g7 ♘f4e6+ ♔g7h7 ♘e6xd8 ♖h8xd8 g2g4 ♔h7g7 ♖h1g1 h5xg4
♖g1xg4 ♘b8d7 OOO ♘d7f8 d4d5 ♔g7h8 ♖g4g1 ♖d8d7 ♕b3c2 ♖d7d6 h4h5
g6g5 ♘c3b5 ♖d6d7 e3e4 ♖a8e8 f2f4 f6f5 f4xg5 ♖e8xe4 g5xh6 ♖d7xd5
♕c2c3+ ♔h8h7 ♕c3xc7+ ♔h7xh6) +7.69/32 200)
score for White +7.69 depth 32. 

Sep1221   newzild: Very easy for a Sunday  11. Bxf7+ is the first move to consider. I followed the game line until 17. Ne7. I played 17. Ng6 instead. 

Sep1221   mel gibson: <Sep1221 newzild: Very easy for a Sunday  11. Bxf7+ is the first move to consider. I followed the game line until 17. Ne7. I played 17. Ng6 instead.> It was the first move I saw too but
I couldn't see a follow up that would justify sacrificing a Bishop. 

Sep1221
  raymondhow: I was finding the right moves, but for some reason wanted to play the inferior 16.Nb5. No Sunday solve for me.. 

Sep1221   Cheapo by the Dozen: Fortunately for my claim to have for once solved a Sunday puzzle, 17 Nxc7 is crushing as well. 

Sep1221   Stanco: the rest is easy 17...Qxh8 18. Ng6+ Kg7 19. Nxh8 Nf8 20. Qe7+ Kxh8 21. Rc1 Rc8 22. Qxf6+ Bg7 23. Qf7 Be4 24. Rxc7 Rxc7 25. Qxc7 Bd5 26. Rh3 Kg8 27. Rg3 Bf7 28. d5 b5 29. d6 Bg6 30. d7 Bf6 31. d8=Q Bxd8 32. Qxd8 Kg7 33. Qe7+ Kg8 34. f4 a5 35. f5 b4 36. f6 Ne6 37. f7+ Kh8 38. Qf6+ Ng7 39. Rxg6 Kh7 40. Rh6# 

Sep1221   newzild: <mel gibson:> After 17. Ng6+ Qxg6 18. Qxd7, White has a rook, a knight and two pawns versus two bishops. 

Sep1221   stacase: Hmmm, I went move for move until 16.
Pretty easy Sunday when I get the first five moves (: 

Sep1221
  chrisowen: Flinched it ok vitals Bxf7 hobble v achtung munches a flushy photon beam ahha vivacious ranches flinched it ok vitals vivacious oaks it oats vitals wobble bonfire vital it hud coz it mellow vitals pegs it purge it junior quivver vitally it sage it dice it oy it slurps vivacious vitals mud it hot throbs brawns vivacious it toad kaputz it rover gab dud fraggier flungs ghouls it suffragette decks x bads x scully mariner cabs it vital conches vivacious bill potter led it again vant it rad blocks tucks it cinch bible it vital blubbs vibrant it hasten it ticky it dob it lawn mower brown it mr vitals Bxf7 door: 

Sep1221   cormier: SF Depth 39
+1.63 10....Qe7 11.Rc1 c6 12.OO Nd7 13.Qf3 Rd8 14.Rfe1 Kf8 15.Qg3 Bh6 16.Rcd1 Kg7 17.Nxh5+ Kf8 18.Qc7 Nb8 

Sep1221
  chrisowen: Would gestate Bf7 no; 

Sep1221
  chrisowen: And yes hmm cut the grass no? 

Sep1221   cormier: SF Depth 40
+1.11 9....Bh6 10.Nc3 Kf8 11.Qf3 c6 12.Rc1 Kg7 13.OO Bxf4 14.Qxf4 Ba6 15.Ne4 Bxc4 16.Rxc4 Qe7 17.Rfc1 Re8 

Sep1221   cormier: SF Depth 38
+1.03 8....OO 9.Nc3 f5 10.cxd5 Bh6 11.Qf3 Qd6 12.g3 Re8 13.Rc1 Bb7 14.Bb5 Rd8 15.OO a6 16.Ba4 b5 

Sep1221
  agb2002: White has a bishop and a knight for the bishop pair. Black threatens Bxf4 and Bxg2.
White controls a number of light squares around the black king. This suggests 11.Bxf7+ Kxf7 (11... Ke7 12.Bd5 looks very bad for Black) 12.Qb3+, starting an attack along these squares: A) 12... Kf8(g7) 13.Ne6+ wins decisive material. B) 12... Ke7 13.Nxg6+ (13.Qe6+ Kf8 14.Nxg6+ Kg7 15.Nxh8 [15.Rh3 Bc8] looks much weaker) B.1) 13... Kd7 14.Qf7+
B.1.a) 14... Kc6 15.Nxh8 wins decisive material (15... Qxh8 16.Qd5#). B.1.b) 14... Kd6 15.Nb5+ Kc6 16.Rc1+ Kxb5 17.Qc4+ Ka5 18.b4+ Ka4 19.Qb3+ Kb5 20.a4+ Ka6 21.Qc4+ b5 22.Qxb5#. B.1.c) 14... Kc8 15.Ne7+ Kd7 16.Nc6+ (other discovered checks don't look useful) 16... Kxc6 17.Qe6+ Qd6 18.d5+ Kc5 19.b4+ Kxb4 (19... Kc4 20.Qe4+ Kxc3 21.Qd4+ Kc2 22.Qd2#) 20.Qe4+ Ka3 (20... Ka5 21.Qa4#; 20... Kxc3 21.Qd4+ Kc2 22.Qd2#) 21.Nb5+ Kb2 22.Qb1#. B.2) 13... Ke8 14.Qe6+ Qe7 15.Qxe7#.
B.3) 13... Kd6 14.Nb5+
B.3.a) 14... Kd7 15.Qf7+ Kc8 (15... Kc6 16.Rc1+ transposes to B.1.b) 16.Ne7+ Kd7 17.Nc6+ Kxc6 18.Rc1+ as in B.1.b. B.3.b) 14... Kc6 15.Rc1+ Kd7 16.Qf7+ and mate in two. C) 12... Ke8 13.Nxg6
C.1) 13... Rh7 14.Qg8+ Kd7 15.Qxh7+ wins decisive material. C.2) 13... Kd7 14.Qf7+ transposes to B.1.
C.3) 13... Qd7 14.Nxh8 Qg7 (14... Qh7 15.Qe6+ and 16.Qxf6+) 15.Qe6+ Kf8 (15... Kd8 16.Nf7+ wins; 15... Qe7 16.Qxe7+ Kxe7 17.Ng6+ and the knight escapes) 16.Nd5 C.3.a) 16... Bxd5 17.Qxd5 c6 18.Qd8#.
C.3.b) 16... Qxh8 17.Qe7+ Kg8 18.Nxf6+ wins.
C.3.c) 16... Na6 17.Nxf6 looks winning (17... Qxh8 18.Nd7+ Kg7 19.Rh3). 

Sep1221   cormier: SF Depth 37
+0.52 7....f5 8.h5 Qd6 9.a3 Nc6 10.Nc3 Nxd4 11.h6 Be5 12.Nfxd5 Ne6 13.f4 Bxc3+ 14.Nxc3 Qxd1+ 15.Rxd1 Bb7 

Sep1221   cormier: SF Depth 39
+0.78 7.Qf3 c6 8.c4 dxc4 9.Bxc4 f5 10.Nc3 Bb7 11.h4 Nd7 12.h5 Qe7 13.OOO OOO 14.g4 fxg4 15.Qxg4 

Sep1221   Stanco: The key is in 3.Bxf6 and 6.Nf4.
11.Bxf7+ and 17.Ne7 are just the side effects of a brilliant strategy 😁
I doff my hat to Rafael! 

Sep1221   cormier: SF Depth 36
+0.12 6....f5 7.h4 h5 8.Nd2 Bb7 9.Nf3 Bh6 10.Be2 d6 11.c3 Nd7 12.OO OO 13.Qb3 a5 14.a4 Kg7 +0.22 6....Bb7 7.Be2 f5 8.Bf3 Nc6 9.c3 OO 10.h4 h5 11.g3 Qc8 12.OO Nd8 13.Re1 Re8 14.Nd2 Ne6 

Sep1221   cormier: SF Depth 37
+0.12 6.h4 h5 7.Nf4 Bb7 8.Nd2 a5 9.Be2 f5 10.Bf3 Bxf3 11.Nxf3 d6 12.c4 Nd7 13.Qa4 OO 14.Qc6 

Sep1221   Lambda: You've completely solved this one once you get to Nxh8. With a rook and two pawns for 12 pieces plus an attack, Bxf7+ is already obviously the right decision, and decisions about how to carry out the later stages of the attack would be made later on. 

Sep1221   cormier: SF Depth 36
+0.03 5....b6 6.h4 h5 7.Nf4 Bb7 8.Nd2 f5 9.Nf3 OO 10.Ng5 Qf6 11.c3 d5 12.Qb3 c6 13.a4 Nd7 

Sep1321   cormier: SF Depth 37
+0.08 5.Ne2 b6 6.h4 h5 7.Nf4 Bb7 8.Be2 f5 9.Nd2 Na6 10.Bf3 c6 11.c4 OO 12.g3 Nc7 13.Rc1 

Sep1321   cormier: SF Depth 38
+0.10 4.c4 b6 5.e3 Bb7 6.h4 h5 7.Nf3 Bg7 8.g3 f5 9.Nc3 OO 10.Bg2 d6 11.OO Nd7 12.Rc1 



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