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| Apr-13-14 | | mrbasso: <exoduz> Your patzer critic is not entirely justified. After 10...Bxc6 11.Be3 black has problems as well. There are (at least) 2 games in the dabases and Hou has undoubtly prepared some improvements for white (for example Bb4 12.Rac1!?).
Bc5+ just blocks the c-pawn temporarily. She intended to go Be7,c5 but first forced the white King to h1. Why not? The white King on h1 is hardly better than on g1 here because after c5 the diagonal a7-g1 is blocked. No tactics there. The only big mistake I can see in this game was 19...b5??.
After 19...f5 white is better but it would not be easy to win this game. |
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| Apr-13-14 | | lemaire90: White to move at move 21 would make a nice Saturday or Sunday puzzle ! |
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Apr-14-14
 | | HeMateMe: Very sharp; white has a mate in 4. Two Bishops working together are monsters. |
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| Apr-15-14 | | sofouuk: after 6.Nc3, Bb4 is the principled move. risking the curled up hedgehog against whites maroczy bind is always a bit dubious |
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| Apr-22-14 | | Boris Schipkov: This game with my notes http://www.chessib.com/hou-yifan-na.... |
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May-03-14
 | | Gregor Samsa Mendel: It must have been very satisfying for white to pull off such an attack. Sort of the chess equivalent of Mike Tyson in his prime. |
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May-03-14
 | | al wazir: White's 21. Rxf5 was obvious. I didn't guess any of the moves that followed, black's or white's. |
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| May-03-14 | | Mating Net: I think most users will find this puzzle to be pretty straight forward for a Saturday.
All in all, a nice mating attack. |
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| May-03-14 | | morfishine: I remember this game and <21.Rxf5>. Perhaps Black improves with 21...f6 I aslo remember Hou's great play in Tata Steel 2013 lopping off a few GM heads (on the way to a 2700+ performance rating) as well as her spirited effort vs Magnus: Yifan Hou vs Carlsen, 2013 ***** |
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| May-03-14 | | gofer: As with all sacrifices, the question is not what will
happen after it has been accepted (and an easily predictable path
has been chosen), but what will happen after it has been refused. <21 Rxf5 ...>
The rook is immune.
21 ... gxf5?
22 Bxf5 ...
22 ... Rfd8?
23 Qxh7+ Kf8
24 Qh8#
22 ... Bh4?
23 Qxh4 Nf6?
24 exf6 Rfd8
25 Qxh7+ Kf8
26 Qg7#/Qh8#
So what now? We are a pawn up with the threat of Rh5
21 ... Nxe5?
22 Bxe5 
21 ... Kg7?
22 e6+
<21 ... f6>
<22 e6 ...>
22 ... gxf5?
23 Bxf5 Rf7
24 exf7+
<22 ... Ne5>
<23 Bxe5 fxe5>
<24 Rf7 Rxf7>
<25 exf7+ ...>
25 ... Kxg7
26 Qxh7+
<25 ... Kg7>
<26 Be5 ...>
In the longterm black is dead, the open f file and protected pawn on f7 mean that
black will eventually have to trade R for B+P and that will be very difficult to
be the trade that black gets! I am wondering if <22 Rh5> might also be an option... ~~~
Hmmm, never thought of <21 ... Qb6?!>... |
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May-03-14
 | | jffun1958: Rest of it ist mate in 4:
24. ... Kh8 25. Bxf6+ Bxf6 26. Qxf5 Rd1+ 27. Rxd1 any 28. Qxh7# |
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| May-03-14 | | waustad: I didn't consider Qb6 either, though I did see the sac. |
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| May-03-14 | | mbvklc: I remember this game too well to get a puzzle out of this. Amazing attack nevertheless. |
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| May-03-14 | | Marmot PFL: 21 Rxf5 gf5 22 Qxf5 and the game soon ends
21...f6 is a better defense, at least I don't see a fast win. Don't see any other tries than 21 Rxf5 anyway as Be4 and e5 are both attacked. |
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May-03-14
 | | chrisowen: At I rook fire far be in f5 reticence ogle f5 lade, quad one rook flow clink to fly in efface off rook f5 safe port of call try etc a fetch in a feed free at I'm afraid black went wrong to a degreed in am I sacrifice time f5 being forstalled jungled it book in am b5, stipulate line bed in a candlearm might blow in the wind f5 had to be tried fetch a gap in sensed rook address the issue no faffer around after chin elevates right cub e4 it is hell to pay in ferry
man a b5 from in on heaves heaven rook to ascent in left lane cramp a dilligent 19...b5 as the beast bade from the live f5 east to west to bide again band be effective in blood bath a feed takes place once bishop and rook undermine at whisk off fell pawn plate let's say in two minds a lint b5 all better to save a lamb like nice cycle b6 one gun
against herd the e4 word cattle prod in call feint if ive got this straightoff man re-cind over straight flight in ascendancy another bird b5 it green in gauge swamp thin guess as to whether ave in f6 up f5 l0 win not so assured in family white rooks calm dispatch in sho at a6 supports b5 although free hi cage offer tile ground one fluff at ok b5 an ogre be to grind your bones right in, flat bed e4 bishop plus am f1xf5 good girl spots straight away in ready mood f5 church of reason too for stumps up the goods to stand and deliver top h3 assist queens a circus again off side g5 trap f5 eases rook f5 in free high wire bus tore delve in park f5 mid field murky oh to pro-saic f5 murky leg up ply in light back black at sixes and sevens
after mini b5 tranquil pos turns into save so cop ola direct caervix queen glean around the edge b5 limp barricade to storm fetch in a wave bishop 100% red dragon services huffle to store knight d7 and queen in a cog c7 turn the wheel f6 low in got bag be better glide at an eight ball pot down f5 you turn f1 castle believe ninety liner dot degrees light cutoff a h8 king escape flood again mind hive like a g6 threatens ai ogle queen h6 or nest in e4 f5 stir up trouble mission select interesting a free clamps again cruise aim f1 farm cedes a ground tree f5 of life cough up a rook yet zest f5 arrive fend for yourself a oomph in f1 corridor chest queen silver c7 beware out e4 of sight one feint am
g8 otb edifice ogle g5 leans into hack at black tries to press the point but fails in sense again post you reap f5 castle looks to wangle gain every, pawn e5 post's apoplectic mans desire to expand a line e6 as lane lust radical d8 and to f8 drill too free hop in bed dangles the worm a nearly done deal knight d7 and bishop e7 in surf over a f6 line yes to bind in cabs too for bullrush the show man bullseye light rook bemoans lack of room make g5 in. |
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May-03-14
| | chrisowen: I queen hay wain over gets above her station the path freer to slam pop the righteous man dig as guffaw am now wiggy rates encircles at bet a crimp to berth in wide fat chance I rade f5 as too e4 lane b5 I against somewhat back beat botch free to bottle great bent b5 a crescent moons wax on wax off crazy advance float over a free in facts opening a shot b5 am wo a 21.Rxf5 Qb6 carnivore misses at her best chance why long tease baffle give in blub er club queen a c7 ha scratch off a rubber thin pick dank and dusty b6 bin feed to a 21...f6 22.Raf1 elegy soar in ready to reload pawn ahead cash in f7. Evermore affabled alive plod free hind giving a plod jazzy bind ja ship a ground banter amongst men e4 port as h8 a king a win around the corner dip am b6 sung high praise go ok line low aid mid bid a foot in so 22.Qh6 gxf5 mate in eight or there abouts a fetch e6 in sketch a swede g6 should, instead bale man'd a net in try dent whale to of 22...f6 23.Rh5 Rf7 24.Bxg6 cutoff h7 goes two pawns ahead e6 threat loom in ar tour I go alive pale in carry ze cross e6 facet off in enough I gleans it edge off in sets h7 re you koinus agreed h7 coffer happen-stance headlong sell camp game lack caver bin identify oh door it book in ref 23.e6 Nf6 mate in five or get I amble diminish aperture turns in top 23...f6 24.Bxf5 mate in six down f5 rock f7 has to be sacrificed it eddy a wave in wheel e6 light frasten seat belts to no avail in why f6 had to come sooner dip in sad sand kick around g8 lade, line nah queen h6 at catch in body g5 of evidence moot back beyond smooth queen set free hide g5 parse e6 parks ala the bus call I wag on beyond the pale f5 still hanging it ok in one fret two set three jet inter extricate on a tin rook g5 bade bags sat inch elongate a king black would I muzzle call off one find f5 nip in tuck 24.Qg5+ mate in for cozy end line f5 has as f6 a net en famile sacrifice aplomb in much again clock f6 basically a melba health queen h6 route one a f5 elevens are up ride a lion f5 bare a d1 bull a f6 ay etc find terminally cuff rook hilt to sword in also runs 24...Kh8 25.Bxf6+ jog in monster try has to recapture down a oomph f6 as rich lap over timed in chica off free to first 25...Bxf6 26.Qxf5 Rd1+ mate in etc two after a1 re-instates capture d1 check serviced in beck and call final fed baba f5 ji believe as tender vis a vis have f5 stir lerk e4 baby f5 back shin as carry harry back d1 you'd think aped it edict in food for try thought a foilable very mission to stop h7 mate in hilter face ogle. |
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| May-03-14 | | Jim Bartle: <21 ... f6>
<22 e6 ...>
22 ... gxf5?
<23 Bxf5 Rf7
24 exf7+
<22 ... Ne5>
<23 Bxe5 fxe5>
<24 Rf7 Rxf7>
<25 exf7+ ...>
25 ... Kxg7
26 Qxh7+ >
Is that 25...Kg7 or 25...Kxf7?
In either case, I can't find a clear win for white after Kg7. |
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| May-03-14 | | agb2002: White has the bishop pair for a bishop, a knight and a pawn. Black threatens 21... fxe4 and 21... Nxe5.
The obvious move is 21.Rxf5, stopping momentarily both threats, recovering a pawn and menacing Rh5: A) 21... gxf5 22.Qxf5 and mate soon.
B) 21... Rfe8 22.Rxf7
B.1) 22... Kxf7 23.Qxh7+ Ke6 (23... Kf8 24.Qh8+ Kf7 25.Bd5#) 24.Bd5+ Kf5 25.Rf1+ and mate in two. B.2) 22... Nf8 23.e6 + -, with the threats Rg7+ and Bxg6. C) 21... f6 22.exf6
C.1) 22... gxf5 23.Bd5+ Rf7 (23... Kh8 24.fxe7+ wins a piece at least) 24.Bxf7+ C.1.a) 24... Kxf7 25.Qxh7+ Kf8 (25... Ke6(8) 26.Qxe7#) 26.Qg7+ Ke8 27.Qxe7#. C.1.b) 24... Kf8 25.Qh6+ Kxf7 26.Qxh7+ transposes to C.1.a. C.1.c) 24... Kh8 25.fxe7+ wins.
C.2) 22... Bxf6 23.Bd5+ Kg7 and Black seems to hold.
D) 21... f6 22.Rh5 gxh5 23.Qg3+ Kh8 (23... Kf7 24.e6+ Ke8 (24... Kxe6 25.Bd5#) 25.Bg6+ hxg6 (25... Rf7 26.Bxf7+ Kf8 27.Qg8#) 26.Qxg6+ Rf7 27.Qxf7#) 24.exf6 Qxg3 (due to Qg7# and Qxc7) 25.fxe7+ Qg7 and it seems that White won't even achieve a minimum material superiority. E) 21... f6 22.Rg5
E.1) 22... fxg5 23.Qe6+
E.1.a) 23... Rf7 24.Bd5 Rdf8 25.Qxe7 and the threat Rf1 looks winning. E.1.b) 23... Kh8 24.Qxe7 and the threat e6+ seems to win material. E.2) 22... Rf7 23.e6
E.2.a) 23... fxg5 24.exf7+ Kxf7 (24... Kf8 25.Qh6+ Kxf7 as in the line) 25.Qxh7+ and the attack looks winning. E.2.b) 23... Rg7 24.exd7 fxg5 25.Qe6+ Rf7 (25... Kh8 26.Qxe7 Rdg8 27.Bxg7+ Rxg7 28.d8=Q+ wins; 25... Kf8 26.Rf1+ wins) 26.Bd5 Rdf8 27.Qxe7 wins. E.3) 22... Nxe5 23.Bxe5 fxe5 24.Bxg6 hxg6 (24... fxg5 25.Qxh7#) 25.Rxg6+ Kf7 26.Qh5 Rh8 27.Rh6+ Kg7 28.Qg6+ Kf8 29.Rxh8#. |
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| May-03-14 | | jdc2: Yes, f6 is the computer solution, and it's really
a "White wins the exchange" problem, I gave up
after not seeing any forced mates.
You could build an entire suite of long and short forced
mate problems from the position after 22...gxf5:
click for larger view23. e6 f6
(23... Nf6 24. Bxf6 Bxf6 25. Bxf5 Rd1+ 26. Rxd1 Ra8 27. Qxh7+ Kf8 28.
Qxf7#)
24. Bxf5 Rf7
(24... Rfe8 25. Qxh7+ Kf8 26. Qf7#)
25. exf7+ Kxf7 26.Qxh7+ Kf8
(26... Ke8 27. Bg6+ Kf8 28. Qf7#)
27. Bc1 Ne5
(27... Qd6 28. Bh6+ Ke8 29. Bg6#)
(27... Rb8 28. Bg6 Qe6 or any other move 29. Bh6#)
(27... Bd6 28.Bh6+ Ke8 29. Bg6#)
28. Bh6+ Ke8 29. Qg8+ Bf8 30. Qxf8# 1-0 |
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| May-03-14 | | PJs Studio: Jdc2 = nice analysis. I failed to see 23...f6 while figuring out this problem. In the game finish I thought 24.Bxf5 works, but it does NOT. Methinks Black can squirm out of mate. Great puzzle CG |
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| May-03-14 | | M.Hassan: <ex0duz>:
10...dxc6 I think I could have done it if it were an endgame producing 3 connected pawns but not on the 10th move blocking the Bishop line as you mention. I quite agree with you that the decline of Black started with this move.
I also agree with you regarding uselessness of 11...Bc5+ which only gives a check, blocks movement of c pawn for a while and then runs away to e7 where it should have gone on move 11 |
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| May-03-14 | | SatelliteDan: Nice to know there are adults here. :). |
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| May-03-14 | | TheBish: Yifan Hou vs N Dzagnidze, 2014 White to play (21.?) "Very Difficult".
Black is up a pawn, and theatens both the Be4 and the Pe5. White's best move meets both threats. 21. Rxf5!
Now Black must not reply 21...gxf5 22. Qxf5 with a quick mate to follow. Also White threatens 22. e6!, opening the long diagonal for the dark squared bishop as well as the f-file. Black badly needs his knight on f8 for defense, but if 21...Re8 (to clear f8) 22. Rxf7! Kxf7 23. Qxh7+ is crushing (23...Kf8 24. Bxg6 or 23...Ke6 24. Qh3+! Kf7 25. e6+ Kg8 26. Qh8#). 21...f6 22. e6!
Taking away f7 from the f8 rook, so that now 22...gxf5 23. Qxf5 Rf7 24. exf7+ Kxf7 25. Qxh7+ leads to a winning attack. 22...Ne5 23. Bxe5 fxe5 24. Rh5!
White has a winning attack. Black can safely resign since 24...gxh5 25. Qxh5 leads to mate, and otherwise 25. Rxh7 will be crushing. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I forgot to analyze 21...Qb6, which is the first defense I considered! My first consideration was 22. e6, which succeeds brilliantly after 22...Qxe6?? 23. Qxh7+! Kxh7 24. Rh5+ Kg8 25. Rh8#; of course Black plays 22...fxe6 after which Black defends. The finish of this game after 22. Qh6! looks familiar, but I don't know if I saw this game (it's very recent) or another one with a similar finish. |
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| May-04-14 | | patzer2: For yesterday's Saturday puzzle, like <al wazir> I found <White's 21. Rxf5 was obvious.> However, the real test (which I didn't pass) after 21. Rxf5 Qb6 was finding 22. Qh6!! with an unstoppable attack on the Black King. Black's last chance to avoid disaster appears to be 19...f5 when play might go 19...f5! 20. exf6 Bxf6 21. Qxe6+ Kg7 22. Qe7+ Rf7 23. Bxf6+ Nxf6 24.
Qxc7 Rxc7 25. Bf3 Rd2 26. Rfd1 Rcd7  . Here White goes a pawn up, but she has a long way to go to convert it to a win. Earlier, Fritz 12's suggestion of 16...h6 = appears to improve. For example after 16... h6 17. b3 Nc5! 18. Nxc5 Bxc5 19. Bb2 Bd4!  White's plan of a King side attack turns on its head. |
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Jan-28-16
 | | Richard Taylor: <<exoduz> Your patzer critic is not entirely justified. After 10...Bxc6 11.Be3 black has problems as well. There are (at least) 2 games in the dabases and Hou has undoubtly prepared some improvements for white (for example Bb4 12.Rac1!?). Bc5+ just blocks the c-pawn temporarily. She intended to go Be7,c5 but first forced the white King to h1. Why not? The white King on h1 is hardly better than on g1 here because after c5 the diagonal a7-g1 is blocked. No tactics there. The only big mistake I can see in this game was 19...b5??. After 19...f5 white is better but it would not be easy to win this game.>> I ran this via Komodo and I concur here re move 19...b5 although it should only get ? as it isn't losing. It certainly makes Black's game difficult as the thematic sacrifice f5 is surely coming. Better than that was 19. ... f5 which hold the balance. If then 20. Bf3 then b5 is now a possibility. White is a little better in the game but Black certainly didn't go wrong 'straight out of the opening'. Also better was 16. ... h6 rather than 16. ... g6 as g6 becomes an easier target. But Black's desire to counter with b5 is understandable. I didn't know this was a problem to solve by the way, I was looking at some games, and came across it. |
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Kibitzing
sac: 22.Qh6