patzer2: Here's my look at today's Monday puzzle (29. ?) and game with the chessgames.com opening explorer, Stockfish 8 and Deep Fritz 15:<1. b3 e5 2. Bb2 Nc6 3. e3 Nf6 4. Bb5 d6> The odd looking popular move here is 4... Bd6 = (0.00 @ 39 depth, Stockfish 8) as in the drawn game R Rapport vs Karjakin, 2017.
<5. d4 exd4 6. Qxd4 Be7 7. Nc3> The theory of this rare opening line apparently ends here, as this is the only game with this move in the opening explorer.
<7...a6 8. Bxc6+ bxc6 9. O-O-O c5 10. Qd2 Bb7 11. f3 O-O 12. Nge2 a5 13. Ng3 Nd7 14. h4 Re8 15. Rh3 Bf8> In response to White's Kingside attack, I prefer the active Stockfish 8 suggestion 15... Ne5 = (0.14 @ 26 depth.) It follows the maxim of taking action in the center to counter a wing attack.
<16. h5 Ne5 17. e4 Bc8 18. Nf5 Bxf5 19. exf5 c6?> Allowing 20. h6 
(+2.40 @ 30 depth, Stockfish 8), this is Black's first potentially
decisive error. Necessary instead is 19... h6 which is barely holding on after 20. Ne4 
(+1.04 @ 30 depth, Stockfish 8.)
<20. h6 g6 21. fxg6 fxg6 22. Ne4 d5 23. Qf4 Nd7 24. Qg4 Ne5 25. Qg3 d4 26. c3 Nf7?> Allowing 27. cxd4 (+2.34 @ 29 depth, Stockfish 8,) this unfortunate move misses an opportunity to save Black's game.
Instead, 26... c4 27. Rxd4 Qe7 28. Qh4 c5 = (0.14 @ 31 depth,
Stockfish 8) bails Black out of trouble.
<27. cxd4 cxd4?!> This makes it too
easy. Putting up more resistance but still losing is 27... Bd6
28. Nxd6 Qxd6 29. Qxd6 Nxd6 30. dxc5 Nf5 31. g4 (+2.10@ 19 depth, Deep Fritz 15)
<28. Bxd4?!> White almost lets Black back in the game. Instead, winning on the spot is 28. Rxd4 Nd6 29. Nxd6 Re6 30. Ne4 Qe8 31. Rd1 a4 32. Qe1 (+5.92 @ 17 depth, Deep Fritz 15)
<28... Rxe4?> The final mistake, allowing mate-in-two. Instead, 28... Re6 29. Bc3 Qc8 30. Qf4 (+1.92 @ 26 depth, Stockfish 8) puts up resistance and makes the win non-trivial for White.
<29. Qxg6+ 1-0> This solves the Monday May 8, 2017 chessgames.com puzzle. Black resigns in lieu of 29...hxg6 30. h7#
Kibitzing
sac: 28.Bxd4
