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Petr Cerveny vs Martin Pagerka
Ceska Trebova RC Sport op (2007), rd 2, Aug-11
Semi-Slav Defense: Quiet Variation (D30)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Aug-03-15  diagonalley: i'm ashamed to admit it took me nearly five minutes to crack this elementary problem!
Aug-03-15  stst: 23.Nxg6+ hxg6 (forced, no other rescue)
24.Rh3#
Aug-03-15
Premium Chessgames Member
  agb2002: The material is identical.

Black threatens 23... Bxg5.

White delivers mate in two with 23.Nxg6+ hxg6 24.Rh3#.

Aug-03-15  saturn2: Black could have already given up after 20 Rd3.
Aug-03-15  patzer2: Here's my look with the Opening Explorer and Deep Fritz 14:

<1. d4 d5 2. c4 c6 3. Nf3 e6 4. e3 Nf6 5. Nbd2 Nbd7 6. Bd3 Bd6 7. e4 dxe4 8. Nxe4 Nxe4 9. Bxe4 Nf6 10. Bc2 O-O?!> Up till now it's known theory and practice in the Queen's Gambit declined. However, 10...0-0?! isn't so popular in theory or practice.

Here Fritz prefers the stronger and more popular move 10... Bb4+! when play might continue 11. Bd2 Qa5 12. O-O Bxd2 13. Nxd2 O-O 14. Qe2 Rd8 15. Nf3 c5 = (+0.10 @ 22 depth) as in P Hohler vs V Koryabkin, 2014.

<11. O-O Qa5?!> This wasted Queen move does nothing to deter White's aggressive King side attacking plan, and allows the first player a clear advantage.

Instead, Fritz prefers 11... c5 when play might continue 12. Bg5 h6 13. Bh4 cxd4 14. Qxd4 Be7 15. Qc3 b5 16. c5 a5 17. Rac1 b4 18. Qe3 Bb7 19. Rfd1 Qe8 20. Ne5 Rc8 21. Bd3 Nd5 22. Qd4 Bxh4 23. Qxh4 Qe7 24. Qxe7 Nxe7 25. Nd7 Rfd8 26. Nb6 Rb8 27. f3 (+0.46 @ 21 depth).

<12. Bg5! Be7>

Not 12... Ne8?? 13. c5 Bc7 14. Be7 (+1.87 @ 22 depth).

If 12... Nh5 White secures the advantage with 13. Qd3 (+0.66 @ 21 depth) when play might continue 13... g6 14. Rfe1 Qc7 15. Rad1 b6 16. Qc3 Bf4 17. Bxf4 Nxf4 18. Ne5 Bb7 19. Qf3 Nh5 20. c5 Rad8 21. b4 Ng7 22. Qe3 Nh5 23. Qh6 Ba6 24. Re4 bxc5 25. bxc5 Rd5 26. Rde1 Rfd8 27. Rh4 Qa5 28. Qe3 Bc8 29. Rxh5 gxh5 30. Nxc6 Qc7 31. Qh6 f5 32. Nxd8 Qxd8 33. Bb3 Rxd4 34. Bxe6+ Bxe6 35. Qxe6+ Kg7 36. Qxf5 Rd5 37. Qc2 (+4.04 @ 20 depth).

<13. Qd3!> ( 0.78 @ 21 depth) Now White has a strong advantage with an attacking initiative.

<13...g6 14. Ne5 Rd8?> This is the clear losing move.

Instead, Black can maximize resistance with 14... Qd8 when play might continue 15. Bh6 Re8 16. Rad1 Nd7 17. Qg3 Nxe5 18. dxe5 Qb6 19. b3 Qa5 20. Bb1 Rd8 21. h4 Bd7 22. Bg5 Bxg5 23. Qxg5 Be8 24. h5 Rxd1 25. Rxd1 Qb4 26. Be4 Rc8 27. Qf6 Qf8 28. Rd3 Qg7 29. Qg5 h6 30. Qg3 g5 31. f4 Kh8 32. Qg4 b6 33. Rg3 Rd8 34. fxg5 hxg5 35. Qxg5 Qxg5 36. Rxg5 Rd4 37. Bf3 Rd2 38. a4 (+1.73 @ 24 depth).

<15. Qf3! Kg7 16. Qf4 Qb6 17. Rad1 Qxb2 18. Bb3 a5 19. Rd2 Qa3 20. Rd3 Qd6 21. Rf3 Nd5 22. Qxf7+ Kh8 23. Nxg6+ 1-0> This solves today's Monday puzzle and compels Black's resignation as it's mate-in-two after 23...hxg6 24. Rh3#.

Aug-03-15
Premium Chessgames Member
  Once: Black's king is stalemated. We apply the normal recipe for stalemated kings - we either check or open lines and keep on checking or opening lines until the king is dead.

Fritzie confirms multiple solutions today. Either 23. Ng6+ or 23. Rh3 forces mate in two, but white also has time for a host of other moves.

In fact, Black is so utterly tied up that we can even give him the move in the puzzle position and white still forces mate in 13.

Good Monday everyone.

Aug-03-15  Everyone: Good Monday <Once>.
Aug-03-15  Cybe: 23. Rh3 (N:g6+) – mate in 2; 23. Bh6 – mate in 7; 23. Bf6+ - mate in 8; 23. cd – mate in 9.
Aug-03-15  morfishine: Its mate in 2: <23.Nxg6+> hxg6 24.Rh3#

<Cybe> I thought so

*****

Aug-03-15  Nick46: <Penguincw ...there's 23.Rh3 followed by mate on h7 (can not be stopped).> Thank you, and Fritzie.
Aug-03-15  starry2013: I saw Rh3 first, nothing can stop mate in 2 moves.

Then looking again later I saw the solution is probably neater with a knight sacrifice. The rook still delivers the mate though.

So the key really is just seeing that rook is ready to swing round and the weakness on h7 which cannot be defended as the black pieces are out of position on the other side of the board.

Aug-03-15  zb2cr: 23. Ng6+, hxg6; 24. Rh3#. So simple, so forced.
Aug-03-15
Premium Chessgames Member
  Sally Simpson: I really wish you guys would wise up and stop piddling about with Nxg6+ and Rh3.

Only me and Penguincw have so far got this one right.

It's Monday.

On Monday you sac the Queen.

Knights sacs are Tuesday. Rook lifts are Wednesday.


click for larger view

23 Bh6


click for larger view

23...Rg8 24.Qf6+ Thus satisfying the Monday criteria.


click for larger view

24...Bxf6 25.Nf7 Checkmate.


click for larger view

----

Good notes Patzer2.


click for larger view

You are right 14...Qd8 would put up stiffer resistance, I don't doubt that at all, (though the outlook is still very grim) but you will never see moves like 14...Qd8 being played at my -2000 level.

That would be like admitting 11...Qa5 was wrong and we of the 'read two chess books and now know it all crowd.' never admit we made a slight error of judgement.

So the Queen stays on a5 and we will make it work! Even if we lose the game 11...Qa5 was not wrong!

The good guys of course tend to stay away from moves they may later on have to admit were faulty. If this happens they do admit to themselves it was wrong and do their best to repair the damage.

That is just a couple of the reasons why they are called the good guys.

Aug-03-15
Premium Chessgames Member
  Penguincw: < Sally Simpson: Only me and Penguincw have so far got this one right. >

Well, looking at <cg> analysis, if 23.Bh6, then 23...Qxe5 (giving up the queen) delays the inevitable for black the longest. However, the position will just crumble for black soon after.

Still counts as a queen sac, right? ;)

Aug-03-15
Premium Chessgames Member
  Sally Simpson: Hi Penguincw:

"Still counts as a queen sac, right? "

Of course it does. That line has two Queen sacs!

Queens are superfluous on Mondays.

Aug-03-15
Premium Chessgames Member
  kevin86: The knight is sacrificed today...fooled us...:)
Aug-03-15  jith1207: <SallySimpson> and <Penguincw>: That definitely looks Gorgeous, a Checkmate with a Royal Fork!

That awkward moment when you force a mate and then get upset over more beautiful mate!!

Aug-03-15
Premium Chessgames Member
  thegoodanarchist: I got this one almost instantly. As soon as I saw the rook could go to h3 and remain unmolested by a Black bishop, then I knew the knight sacrifice with check was the solution.

I am not saying this to boast, only to let Sally Simpson know that other folks got the puzzle right.

Aug-03-15  rozzatu: so I am not the only one that consider this puzzle "difficult". Maybe it is counter intuitive.
Aug-03-15  patzer2: <Penguincw>< Sally Simpson> Enjoyed the amusing post(s) about forcing a Queen Sac leading to mate on today's Monday puzzle with 23. Bh6 Rg8 24. Qf6+ Nxf6 (24...Bxf6 25. Nf7#) 25. Nf7#.

However, 23. Bh6 Bf6 seems to spoil the fun as the only reasonably quick route to mate from here is 24. Bg7+ Bxg7 25. Nxg6+ hxg6 26. Rh3+ Bh6 27. Rxh6# without a Queen sac.

Aug-03-15
Premium Chessgames Member
  scormus: <Penguincw> < Sally Simpson> "like" :)

<patzer2> if you insist on confuseing us with reality details, you'll never make it in the tabloid press ;)

<chessgames> why not give us a "like" button

Aug-03-15  BOSTER: Beginning from move 15.Qf3 black <f7 square> as a target was under strong pressure, because knight f6 was pinned.

And this is a key to understand the such pos.

And I want to add that <chrisowen> many times claimed in his short, as usual, comment <pin f7 as quintessential>.

Aug-03-15  M.Hassan: Like everybody has mentioned: It's Knight sac.
Aug-03-15  stacase: 23. Rh3 does the job, no sacrifice necessary.
Aug-03-15
Premium Chessgames Member
  eternaloptimist: I solved this 1 in about 1/2 a minute or so. A few
seconds after I looked at the position I figured that Nxg6+ was probably in the mix
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