Aug-29-23
 | | An Englishman: Good Evening: Black's second is the sly and must-see move--after 29.R2d2,Rd8! the Rd4 is pinned to the White King and cannot play Rxd8+. |
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| Aug-29-23 | | mel gibson: What a weird puzzle -
I don't get it?
Stockfish 16 has a different solution:
27. .. Qa7
(27. .. Qa7 (Qb8-a7 Rf2-f4 Bf6xd4+ Rd1xd4 Ra8-d8 Qc3-e3
Rd5xd4 Rf4xd4 Qa7xd4 Qe3xd4 Rd8xd4 Nc4xa5 Rd4-d1+ Kg1-f2 Rd1-d2+ Kf2-f3
Rd2xb2 a2-a4 Ba6-b7+ Kf3-e3 Bb7xg2 Na5-c4 Rb2-a2 Nc4-e5 f7-f6 Ne5-c4 Bg2-h1
Nc4-d2 Ra2xa4 Nd2-f1 Ra4-a2 Nf1-d2 Bh1-b7 Nd2-f1 Bb7-g2 Nf1-d2 Bg2-h3
Nd2-f3 Bh3xf5 Ke3-f4 Ra2-a4+ Kf4-g3 Kg8-h8 Kg3-f2 Bf5-e6 Kf2-g1 g7-g5)
+6.47/42 126)
score for Black +6.47 depth 42. |
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| Aug-29-23 | | agb2002: Black has the bishop pair for a bishop, a knight and a pawn. The rook on d1 is defenseless and the bishop on f6 x-rays the white queen. These details suggest 27... Qa7, x-raying the white king: A) 28.Bxa7 Rxd1+ 29.Rf1 Rxf1+ 30.Kxf1 Bxc3 wins decisive material. B) 28.Rfd2 Bxd4 29.Rxd4 Rad8 30.Ne3 Rxd4 wins a rook. C) 28.Rf4 Bxd4 29.R1xd4 Rad8 as in C.
D) 28.Nxa5 Rxd4 29.Rxd4 (29.Nc6 Rxd1+ 30.Qe1 Rxe1#) 29... Bxd4 wins decisive material (30.Nc6 Bxf2+). |
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| Aug-29-23 | | TheaN: One of those rare cases where switching moves works, despite the different lines. I'm in the text line group, with the idea to reload after 29.Rfd2/Rf4 with Rd8 as Rd4 is now absolutely pinned. 27....Qa7! works straight away because the bishop is pinned to both the queen and rook, and <agb> describes perfectly what happens after Bxa7. |
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| Aug-29-23 | | saturn2: 27...Rxd4 followed by Qa7 was my choice. There is no unpinning the Rd4 by 29.Rd8+. Black will be a piece up. And not enough also the Rf2 will be pinned. |
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| Aug-29-23 | | Brenin: Ah, a second POTD, after a repeat of last Tuesday's was substituted. Those diagonals intersecting at d4 suggest 27 ... Rxd4, but the exchange sac is unnecessary: the quieter 27 ... Qa7 is stronger, thanks to the double pin on the R on d4. |
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Aug-29-23
 | | scormus: 27 ... Rxd4 and ... Qh7 are obvious candidates, but which one is better? For once SF does't give a clear answer, switching repeatedly from one to the other with both close to +7.5 for B who wins the rook. Intuition suggests ... Qa7 might be better, avoiding the (perhaps) unnecessary temporary exchange sac, and keeping more of B's powder dry.
Why isn't 27 ... Qh7 better? Because W now has 28 Rf4 and B has a bit more work to build up more pressure on d4 for the same result. On reflection, I think 27 Rxd4 gets the job done more simply. It's also the one that first came to my mind, though I wasn't at the time sure if it was best. |
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| Aug-29-23 | | jrredfield: I chose
27 ... Qa7
28 Rf4 Bxd4+
29 Rdxd4 Rad8
30 Qe3 Rxd4
31 Rxd4 Qxd4
But as others have said, 27 ... Rxd4 also wins with 28 ... Qa7 following. |
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Aug-29-23
 | | chrisowen: I'm gas its z give brow quick Rxd4 abc claw its Qa7 go ia arrive o its ooh its bin Rxd4 ove Qa7 bet |
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| Aug-29-23 | | TheaN: <scormus> that's because both answers lead to the same position with best play. So they are in fact interchangeable |
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| Aug-29-23 | | King.Arthur.Brazil: Maybe... 27...Rc5 28. Bxc5 Bxc3 29. bxc3 Bxc4 or 28. Bxf6 Rxc4 29. Rd8+ Qxd8 30. Bxd8 Rxc3 31. bxc3 Rxd8. Today, I failed both. I saw Rxd4, but I felt as it only recovers the ♗ x♖. Didn't think much. Sleepy. |
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| Aug-29-23 | | Refused: 27...Rxd4 28.Rxd4 Qa7 and all the pins means it's 0-1 |
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| Aug-29-23 | | varishnakov: This one took me an embarrassingly long time to think of the first move. I kept wanting to play ...Bxc4 followed by ...Qd6 and piling on the pinned bishop but it's not an absolute pin so he can play Bxf6 and Rxd8 if I take both his rooks. I also looked at ...Rc5 and ...Qd8. When I finally seriously considered ...RxB I got the lines quickly. Don't know why I struggled with it. |
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Kibitzing
sac: 27...Rxd4