|
< Earlier Kibitzing · PAGE 2 OF 2 ·
Later Kibitzing> |
| Feb-17-17 | | agb2002: White is a knight and a pawn down.
Black threatens Rxd1, Rf2+, Rf7, etc.
The black bishop is defenseless so it seems to be possible to attack the black king with tempo with 25.Bxh7+: A) 25... Kxh7 26.Qh5+
A.1) 26... Kg7 27.Rxf1
A.1.a) 27... Ne8 28.Qh6+ Kg8 29.Rf8#.
A.1.b) 27... Kg8 28.Qf7+ Kh8 29.Rf4 followed by Rh4+ wins. A.2) 26... Kg8 27.Rxf1
A.2.a) 27... Bg7 28.Qf7+ Kh7(8) 29.Rf4 followed by Rh4+ wins (29... d4+ 30.Kg1). A.2.b) 27... Ne8 28.Qxe8+ Kg7 (28... Kh7 29.Rf7+) 29.Qxe6 wins decisive material. A.2.c) 27... Nb5 28.Qe8+ Kg7 29.Qxb5 + - [R vs B]. A.2.d) 27... Na6 28.Qg6+
A.2.d.i) 28... Bg7 29.Qe8+ Kh7 30.Rf4 as above.
A.2.d.ii) 28... Qg7 29.Qe8+ Kh7 30.Rf7 wins the queen. A.2.d.iii) 28... Kh8 29.Rf8#.
B) 25... Kf7 26.Qh5+ and 27.Rxf1 + - [R vs N].
C) 25... Kf8 26.Qxf1+ + - [R vs N].
D) 25... Kg7(h8) 26.Qxd4+ Kxh7 27.Rxf1 + - [R vs N]. |
|
Feb-17-17
 | | al wazir: That wasn't difficult at all. |
|
| Feb-17-17 | | AlicesKnight: <al wazir: That wasn't difficult at all.> Certainly less difficult than some for poor mortals like me .... |
|
| Feb-17-17 | | leRevenant: here here |
|
| Feb-17-17 | | ChessHigherCat: More of a free day than a Friday puzzle. Is it too late to give a real one? |
|
| Feb-17-17 | | saturn2: White can sacrifice the bishop. The black king is nude then. The remaining queen, pawn on g5 and rook who will play RxRf1+ are enough to justify this. |
|
| Feb-17-17 | | morfishine: Bingo, Bango, Bongo
***** |
|
| Feb-17-17 | | gofer: <25 Bxh7+ ...> The bishop is immune due to mating threats and the king cannot move
to a square where Qxd4 is check, so that just leaves... <25 ... Kf8>
<26 Qxf1+ Ke7>
<27 Qf4 ...>
27 ... Bxb2
28 Qb4+ 
27 ... e5
28 Qf6+
27 ... Bg7
28 Rf1
27 ... Nb5
28 a4
<27 ... Bc5>
<28 Rf1 ...>
click for larger viewThe king must move to d7 and the only way to stop Pg5 is to sacrifice
knight or bishop at which point the ugliest win for white is to
exchange off Q+N/P for Q+R and move into a won endgame, but really
black is doomed... |
|
| Feb-17-17 | | wooden nickel: <YouRang: I probably wouldn't have seen it OTB, but since this position is plopped in front of me and called a "puzzle", I'm inclined to look at the check: 25.Bxh7+>
Couldn't be said better... figuring out how to retake the rook might have kept us too busy, which retake is the best? |
|
| Feb-17-17 | | patzer2: For today's solution, I figured 25. Qxf1  to is probably too easy for a Friday puzzle, so it must involve getting the White Queen to h5 for an attack on the exposed King.At first I tried to make 25. Qh5? work, but my calculations kept giving Black too much counter play. Finally I looked at the demolition 25. Bxh7+ kxh7 26. Qh5+ Kg8 27. Rxf1 and it became clear White's attack on the exposed King will be decisive. After checking it on the computer, it turns out, 25. Qh5? is totally busted after 25...Rxa1 26. Qxh7+ Kf1 27. Bg6 Bg7  (-11.01 @ 20 depth, Deep Fritz 15) The "obvious" 25. Qxf1 Ne8 26. Rd1 Qe7 27. Bxh7+ Kxh7 28. Qd3+ Kg8 29. Qxd4 to (+1.78 @ 25 depth, Deep Fritz 15) probably wins with greater difficulty, but as can be seen in the Fritz line it only delays the Bxh7+ sacrifice. The immediate demolition with 25. Bxh7+! Kf8 (25...Kxh7 26. Qh5+ Kg8 27. Rxf1 Forces mate-in-7) 26. Qxf1 (+5.57 @ 20 depth, Deep Fritz 15) is strongest and best. One observation about the game line is that trying to get cute with the in-between move 27. Qg6+ Kf8 28. Rxf1+ Ke7 29. Qh7+ Kd6 30. Rf8 Kc6 31. Qc2+ Kd6 32. g6 (+1.31 @ 20 depth, Deep Fritz 15) might be barely winning for White. However, it gives Black far too much counter play and over complicates a much simpler win with 27. Rxf1 forcing mate-in-seven. P.S.: For a Black improvement, I'd start with the opening. Instead of 6...Bb4 7. Ndb5  (+0.52 @ 30 depth, Komodo 10.1), I'd pick the popular move 6...a6 = (0.14 @ 34 depth, Komodo 10.1) as in Ponomariov vs Ivanchuk, 2013. |
|
| Feb-17-17 | | The Kings Domain: With the talented Frenchman when the opportunity arises expect an impressive sacrifice. Good puzzle and a standout MVL game. |
|
| Feb-17-17 | | Carlos0012358: White's attack is obvious, so not difficult.
Key inflection points are
1) after 25. Bh7, should black take the white B or flee?
2) assuming 25.....Kxh7, then next is after 27. Rxf1, black chooses 27....Nb5. Several options here, as <agb2002> points out. Some better than Nb5, but none lead to a good outcome for black. <agb2002> your analysis is always exhausting and excellent. Don't know how you find the time. Great job. |
|
| Feb-17-17 | | drollere: this seemed really easy ... for a friday. maybe a tuesday/wednesday. |
|
Feb-17-17
 | | Willber G: <leRevenant: here here> Where where? |
|
| Feb-17-17 | | 1.e4effort: Easiest Friday I think I've ever seen. |
|
| Feb-17-17 | | morfishine: Wednesday-ish |
|
Feb-17-17
 | | Jimfromprovidence: < gofer>
<25 Bxh7+ Kf8 26 Qxf1+ Ke7 27 Qf4 ...>
click for larger viewLike 27 Qf4 a lot. If black's bishop takes the b pawn, white checks and wins the bishop. If 27...Bc5, then 28 g6 or 28 Rf1.
If 27...Bg7 or 27...Bh8, then 28 Rf1, seeing 29 Qf7+ or 29 g6. |
|
| Feb-17-17 | | jith1207: I somehow liked 25.Bxh7 Kxh7 26.Qd3 attacking rook, bishop and king but Rf5 gets only a bishop while losing rook in many ways than one. So Qh5+ and everything falls in place. |
|
| Feb-17-17 | | jith1207: <Loose pieces drop off> <CG> I like the way you have put out a quote while we wait for the website to bring the comments section again. Thanks. |
|
| Feb-17-17 | | jith1207: <whooops> this time I got an advertisement on premium membership. Good to know some creative minds are at it. |
|
| Feb-17-17 | | jith1207: <When you see a good move, look for a better one> I like this game. A Lot. |
|
| Feb-17-17 | | jith1207: <Patzer sees check; Patzer gives check> Patzer sees a trick; Patzer falls into a trick. |
|
| Feb-17-17 | | whiteshark: An unusual 1 4 Game Collection: 70a_middlegame SACS Bxh7+!! (or it may Knott) |
|
| Feb-17-17 | | mel gibson: An easy one - but the King can't take that Bishop or it's checkmate. |
|
| Feb-18-17 | | agb2002: <Carlos0012358: ...
<agb2002> your analysis is always exhausting and excellent. Don't know how you find the time. Great job.> Thank you! I try to solve the puzzle at breakfast time, perhaps too quickly and not completely awake. If I need more time I come back to the puzzle once or several times along the day. However, this usually generates absurd mistakes, oversights and the likes but I prefer a poor 'solution' than none at all. |
|
 |
|
< Earlier Kibitzing · PAGE 2 OF 2 ·
Later Kibitzing> |
Kibitzing
sac: 25.Bxh7+