< Earlier Kibitzing · PAGE 2 OF 2 ·
|May-07-07|| ||D4n: Simple back row-mate. Fun stuff...
|May-07-07|| ||zb2cr: Vulnerable back rank. As has been pointed out many times, it's easier when you know there is a winning move there. So I saw it quickly.|
|May-07-07|| ||nimzo knight: Easy but interesting!|
|May-07-07|| ||Crowaholic: Easy but interesting. It seems White loses the queen, too:|
29. Qa7? Qf1+ 30. Qg1 Rc1!
and mate the next. So White has to allow QxQ by playing e.g. g4. Mating should then take a little bit longer though not much. But of course the best move is 29. 0-1 ;-)
I have started to solve John Nunn's Chess Puzzles last week and found playing out problem 23 against the computer very instructive, too. It's way more complex than this puzzle. Both sides still have all heavy pieces - plus a vulnerable back rank (king side). Black wins by pushing his two queenside pawns but you'll have to avoid numerous mating and material gain threats by White on the way as well as prevent a draw by repetition. I had to take back several moves because they turned out to be refutable, but I definitely learned something.
|May-07-07|| ||Crowaholic: <nimzo knight: Easy but interesting!> LOL, you beat me to it.|
|May-07-07|| ||realbrob: 28..Qxf6 and as <Crowaholic> already proved, Black wins both White rook & queen. |
It was so easy I solved it yesterday! :)
|May-07-07|| ||Youjoin: <yoni.tsab: Interesting to see that after 28...Rc1+ 29 Rf1 Qd1 30 Qf8+! white can get away with annoying checks.>
If 28...Rc1+ 29 Rf1 Qd1, then 30.Qf4+ and white wins the rook|
|May-07-07|| ||YouRang: A Monday queen sac to take out the key defender of white's awful back rank mate vulnerability.|
That's just NOT how you want your king to be when your opponent has a queen and rook on a fairly open board.
Interesting Monday puzzle.
|May-07-07|| ||yoni.tsab: <Youjoin> you right, more accurate.|
|May-07-07|| ||YouRang: It looks like this game was a dead draw after 26 moves, until white gave it away with back-to-back blunders: 27. Bxb5? and 28. Rxf6?.|
Obviously, white thought he was picking up a free pawn amid the piece exchange, but didn't notice he had opened up the c-file for the black rook; a bad mistake given the easy back-rank target his king had become.
In a drawn game, it is good play to give your opponent opportunities to blunder, as black did here with 26...b5! If white had played 27. Rxf6, it's probably a draw, but even with that, white must play accurately to avoid given black a queenside advantage (either an extra pawn, or a passed pawn).
|May-07-07|| ||newton296: white's game is fine after f3 or bh6 as he gets the exchange back! I'll bet white's game heads downhill only after 25) Bc4 running away fron the rook instead of offering trade for the strong black n after h3 followed by ...rxb Q x n and now a tough ending but playable for white. or 25) bf3 ...Qxb2 and after h3 white's attack keeps going enough to draw the ending!|
|May-07-07|| ||kevin86: Looking at thois puzzle was funny-even without the nose of a hound dog,I could smell a back row mate. With two defenders along the f-file,the direct approach didn't work. All black needed was to thin out the defenders and the usual Monday bill of fare-the queen sac-was able to accomplish the goal.|
|May-07-07|| ||furthestgnat: what about 28)...Qa1 29)Rf1, Rc1 30)Rxc, Qxc 31)Qf1, Qxf1++|
|May-07-07|| ||YouRang: <furthestgnat: what about 28)...Qa1 29)Rf1, Rc1 30)Rxc, Qxc 31)Qf1, Qxf1++>|
I looks like after 28...Qa1+ 29. Rf1 Rc1, white should play 30. Kg1 instead of 30. Rxc1.
|May-07-07|| ||fm avari viraf: Simple & elegantly exploited the Back Rank weakness.|
|May-07-07|| ||ianD: Simple back row mate
|May-07-07|| ||wals: No sweat with this one|
|May-07-07|| ||nateinstein: This puzzle reminds me of a recent loss I had. I was able to find this one quickly :).|
|May-07-07|| ||simsan: <openingspecialist> Yes, the 19.exf6 line seems to be winning for white. The first couple of moves are rather forced:|
19. .. Rxf6 (black must retake with the rook or white will play QxR on the next move and subsequently line up his bishops [with check] to queen the f pawn)
But now white can play 20.Qc3! which threatens 21. Bg5 (as well as discovered check should the rook move).
Black's only possible defence is still to move the rook with 21. .. Rxf1+
But after 22. Bxf1 white now threatens discovered check combined with attack on the black Q (and mate to follow in many variations).
There is material balance, but white's pieces are active, while all of black's remaining pieces are in their starting positions.
Black must move the king (e.g. to f7) in order to avoid immediate checkmate, but this also looses quickly after e.g.
21. ..Kf7 22. Bc4+ Ke8 23.Bb3 (black is locked down)
..which might be followed by this nice continuation:
23. .. Nd7 24. Ne6 Qf6 25. Nc7 Kd8 26. Bg5 Qxg5 27 Nxg5
|May-07-07|| ||Robin01: I was having a tough time with this one until I realized it was black to play, and then it did not take me long to work it out.|
|May-08-07|| ||willyfly: I saw 28...♕a1+ winning after 29.♖f1 ♖c1 30 ♖xc1 ♕xc1+ but as <YouRang> pointed out 30 ♔f1 and white promotes a ♙ or two.. Since I thought I had the answer I didn't look any further. Hate it when I miss the easy ones|
|May-08-07|| ||YouRang: <YouRang: <furthestgnat: what about 28)...Qa1 29)Rf1, Rc1 30)Rxc, Qxc 31)Qf1, Qxf1++>
I looks like after 28...Qa1+ 29. Rf1 Rc1, white should play 30. Kg1 instead of 30. Rxc1.>|
I see now that it's actually much worse than that. After
28...Qa1+ 29. Rf1 Rc1, we have this position (white to move):
click for larger view
Now, white can steal black's rook: 30. Qf4+! followed by 31. Qxc1 .
|May-09-07|| ||notyetagm: This is the very example that taught me the tactical principal that you need <N+1> pieces controlling a square that you want to <OCCUPY> if the enemy controls that square <N> times.|
See, that is a subtle difference. If you are trying to <DEFEND> a square that the opponent controls <N> times, then you are trying to prevent the -opponent- from occupying the square and need only control that square <N> times yourself.
But if -you- want to <OCCUPY> a square, not <DEFEND> the square to keep the enemy's pieces out, then <N+1> is the minimum if the opponent controls the square <N> times.
<Here White needs to control the f1-blocking square -twice- since after ... ♖c8-c1+ Black will control this crucial square -once-.> But after the brilliant <REMOVE THE GUARD> 28 ... ♕d4x♖f6!, White will only be able to control the f1-square once and will therefore be mated after 29 ♕f7x♕f6 ♖c8-c1+ 30 ♕f6-f1 ♖c1x♕f1#.
|May-09-07|| ||notyetagm: See Alekhine's brilliant 16 ♕d1x♗d6!! in Alekhine vs Kohnlein, 1908 for another example of the same tactical theme as Atalik's 28 ... ♕d4x♖f6! in this game.|
|Oct-09-11|| ||notyetagm: Game Collection: SUPPORTED INTERPOSITION REQUIRES *TWO* DEFENDERS|
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