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| Jun-23-16 | | The Kings Domain: I thought 27) Nc7 was the bee's knees. Nice and clever puzzle, and a good game too. |
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| Jun-23-16 | | agb2002: White has a bishop for a knight.
Black threatens 27... Rxg2.
Black's back rank is weak and the white queen x-rays the black king. Therefore, 27.Nf6+: A) 27... gxf6 28.gxf6+
A.1) 28... Rxg2 29.Rd8+ Qe8 30.Rxe8#.
A.2) 28... Kf8 29.Qg7+ Ke8 30.Qh8#.
A.3) 28... Kh8 29.Qg7#.
B) 27... Kf8 28.Rd8+ Ke7 29.Re8+ Kd6 (29... Qxe8 30.Qxe2+ and 31.Nxe8 wins) 30.Rxe2 gxf6 31.Rd1+ and gxf6 + - [R+P vs B]. C) 27... Kh8 28.Rd8+ wins.
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Another option is 27.Nc7:
A) 27... Rxg2 28.Rd8+ Qe8 29.Rxe8#.
B) 27... Qe5 28.Rd8+ wins.
C) 27... Qe8 28.Qxe2 wins (28... Qxe2 29.Rd8+).
D) 27... Bd7 28.Qf1 (or 28.Nxb5 Rxg2 29.Rxd7 axb5 30.Rxb7 Rc8 31.c3 Kf8 32.Rxb5 + - [2P]) 28... Qc5 29.Qxe2 (29.Rxd7 Qxc2+ 30.Ka1 Qxb2#) 29... Qxd4 30.Nxa8 + - [R+N vs B]. E) 27... Rb8 28.Rxb5 Rxg2 29.Rd8#.
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27.Nf6+ looks slightly weaker than 27.Nc7 but I think I'd play 27.Nf6+. |
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| Jun-23-16 | | Lambda: Opening the g-file like that is a standard pattern, but doing so when the attacker can be taken because the pawn ends up maintaining bank rank mate threats is something I've never seen before. |
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| Jun-23-16 | | AlicesKnight: It looks like 27.Nf6+; if gxf6, 28.gxf6+, Rxg2; 29.Rd8+ and mate to follow. If 27.... Kf8, then 28.Rd8+ and the N covers the e8 square as well as the R, so 28.....Re8 loses to Rxe8+ and 28....Ke7 allows 29.Re8+ winning at least the exchange (if 29....Qxe8, 30.Qxe2+ and time to take the BQ) and chasing the BK out into the open. Let's see the game .... OK, Black generously accepted the sacrifices. |
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| Jun-23-16 | | gofer: Today's POTD is a forced win in very few moves, so really pretty easy for a Thursday. <27 Nf6+ ...>
The knight is immune.
27 ... gxf6
28 gxf6+ Rxg2
29 Rd8+ Qe8
30 Rxe8#
Moving the king into the corner loses too much material. 27 ... Kh8
28 Rd8+ Re8
29 Rxe8+ Qxe8
30 Nxe8 
So the king must take his chances and come out into the open. <27 ... Kf8>
<28 Rd8+ Ke7>
<29 Re8+ Kd6>
<30 Rd1+ ...>
30 ... Kc5
31 Rd5+
click for larger view<30 ... Kc7>
<31 Nd5+ ...>
31 ... Qxd5
32 Qxd5
<31 ... Kb8>
<32 Rxe2>
click for larger view~~~
Yep... |
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| Jun-23-16 | | gofer: <YouRang: <27 Nc3>!> Nice...
click for larger viewMaterially, a solution equal to <27 Nf6+>.
click for larger viewBut, positionally I would take the black rook, king and bishop all being bunched up in the corner and ALL my pieces being active as a huge
benefit... |
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| Jun-23-16 | | morfishine: Straight forward with Black's vulnerable back rank |
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| Jun-23-16 | | Joseph Blackcape: I admit to being blind. My first thought (and what I would play in a game) was to simply play 27. ♘c3 and just win the piece (unless Black prefers to get mated). 27. ♘f6+ is of course much more devastating. |
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| Jun-23-16 | | dfcx: 27.Nc3 forks rook and queen. Since black has a weak bank rank and requires both queen and rook to guard it, a direct attack on the defenders wins. A. 27...Rxg2? 28.Rd8+ Qe8 29.Rxe8#
B. 27...Qc6 28.Qxe2 Qxh1+ 29.Rd1 and black can't save the queen and guard back rank in one move. |
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| Jun-23-16 | | ASchultz: Nc3 was my choice.
It's interesting to see how Black seems to win a pawn with a standard French trap but there is so much still to do! |
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| Jun-23-16 | | CHESSTTCAMPS: Material is essentially even, but black's lag in development leaves the back rank fatally weak, making Black's threat of 27... Rxg2 ineffectual. White can ignore the threat with 27.Nf6+!: A. 27... gxf6 28.gxf6+ Rxg2 29.Rd8+ Qe8 30.Rxe8#
A.1 28... Kh8 29.Qg7#
A.2 28... Kf8 29.Rd8+ Q/Re8 30.Qg7#
B. 27... Kh8 28.Rd8+ R/Qe8 29.Rxe8+ wins
C. 27... Kf8 28.Rd8+ Ke7 (R/Qxe8 29.Rxe8+) 29.Re8+ Kd6 (Qxe8+? 30.Qxe2+ wins Q) 30.Qxe2 Qxe2 31.Rxe2 gxf6 32.gxf6 is winning (R+P for B) Time for review... |
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| Jun-23-16 | | cocker: Unusual puzzle today. The players are even weaker than me. |
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| Jun-23-16 | | dnp: was rather easy for a Thursday |
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| Jun-23-16 | | Caissas Clown: <dnp: was rather easy for a Thursday> Agreed - came to me in a flash. Yet I cannot be smug,as sometimes my brow is furrowed as early as Tuesday ! |
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| Jun-23-16 | | YetAnotherAmateur: A lot of threats here, but I like it:
27. Nf6+
That leaves black with only a few legal responses:
A) ... Kh8? 28. Rd8+ Qe8 29. Rxe8#
B) ... gxf6 28. gxf6+! Rxg2 29. Rd8+ Qe8 30. Rxe8# (there are other lines, but that's the longest) C) ... Kf8 28. Rd8+ Ke7 29. Re8+ and then:
C1) 29. ... Kd6 30. Rxe2
C2) 29. ... Qxe8 30. Qxe2+ Kd6 31. Qxe8 |
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Jun-23-16
 | | steinitzfan: I saw the line that got played but couldn't track the long line where Black plays 27...Kf8. Right now I'm kicking myself for not seeing the knight forks. 27Nc3 wins a rook free and clear and it seems the position is consolidated. 27Nc7 is devastating and 27Nb6 seems to win the exchange. |
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| Jun-23-16 | | patzer2: The biggest decision for me on this Thursday puzzle was deciding between 27. Nf6+ (+10.85 @ 21 depth) and 27. Nc3 (+5.46 @ 21 depth). I picked 27. Nc3 as my first choice because it seemed easier for me to calculate than the ensuing King chase after 27. Nf6+ Kf8 28. Rd8+ Ke7 (diagram below). 
click for larger viewHowever, if I had looked a move deeper I would have seen (diagram above) the crushing 29. Re8+ Kd6 (29... Qxe8 30. Qxe2+ ) 30. Rxe2 gxf6 31. Rd1+ Kc7 32. Qg3+ Kb6 33. Qf2+ (+21.94 @ 18 depth, Deep Fritz 15) is not so difficult to calculate. Black's decisive mistake was 26...Re2?, allowing 27. Nf6+! . Instead, 26...Bf5 27. Nc3 Qc5  (0.36 @ 21 depth, Deep Fritz 15) keeps Black in the game with a near level position. |
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| Jun-23-16 | | patzer2: In addition to 27. Nf6+ and 27. Nc3 , another winning alternative is 27. Nc7 (diagram below)
click for larger viewwhen Black can complicate things with 27...Bh3 (diagram below). 
click for larger viewHere (diagram above) White wins with 28. Qg1 (not 28. Qxh3? Qc6 29. Rc1 Qxc7 30. Rd7 Qf4 31. Rxb7 ) 28... Qc6 29. Qd1 Qxc7 30. Qxe2 (+2.56 @ 20 depth, Deep Fritz 15). |
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| Jun-23-16 | | mel gibson: It's an easy one & black can't take the Knight. |
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| Jun-23-16 | | thegoodanarchist: It's "Nf6+" week in puzzle land. |
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| Jun-23-16 | | eblunt: Surely 27. ♘c7 is winning ? A triple threat ... ♘x♕, ♖d8+ and ♕xe2 black cannot play 27 ... ♖xg2 as 28 ♖d8+ wins immediately. I don't see a good move for black that counters these three threats. |
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| Jun-23-16 | | eblunt: Just seen <Patzer> yes much better analysis than mine thank you. |
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| Jun-23-16 | | kevin86: The knight sac opens the file and sets up the black king to be pinned to the last row. Black ate the bate and was mated back-rank style. |
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| Jun-23-16 | | alisog: That's wonderful |
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| Jun-23-16 | | morfishine: All in all, way too simple of a position for a Thursday, and subsequently, way too much attention devoted to such a trivial problem ***** |
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Kibitzing
sac: 27.Nf6+