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Michael Adams vs Serge Vanderwaeren
Moscow Olympiad (1994), Moscow RUS, rd 5, Dec-05
French Defense: Normal Variation (C00)  ·  1-0



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Kibitzer's Corner
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Apr-06-09  CHESSTTCAMPS: <Patriot:> wrote <After 27...Kg8 I missed the simpler 28.Qh6! threatening mate in 1! (28...Nxh6 29.Rg7#). As I said, NOT a typical Monday!>

Nice catch - I missed this instructive line (also caught by <AGB2002> in his usual thorough analysis) in my "teaching" post.

Apr-06-09  Patriot: <CHESSTTCAMPS> Actually I failed to catch that. I went back and saw <AGB2002>'s post afterward, so credit goes to <AGB2002>.
Apr-06-09  Patriot: Another flaw in my line: 26.Rc7 Qb4 27.Ne6+ Kg8 28.Rxb7 (much better is 28.Qh6!) 28...Qb1+ 29.Kf2? (29.Bf1 is much simpler).

Yeah this is "very easy"...LOL.

Apr-06-09  YouRang: After a couple minutes of trying to find a mating attack, I finally settled on how nice a square e6 would be for the knight, and then it all came together.
Apr-06-09  kevin86: A stupid puzzle:(

Where's the excitement?

Apr-06-09  fyad reject: everyone saying this is hard makes me feel better
Premium Chessgames Member
  Jimfromprovidence: FWIW, after 26...Qd6 white can play 27 dxe5 before Rxb7 and still get the same result.

click for larger view

Now after 27...fxe5 28 Rxb7 here is the position.

click for larger view

Black cannot play 28...exf4 because of 29 Qe8+, which leads to a forced mate.

Apr-06-09  whiteshark: 26.Rc7 an it's all over. I like the line 26...Qb4 27.Ne6+ Kg8 28.Qh6.
Apr-06-09  PinnedPiece: Monday goal: 30 seconds to solve.

Saw 26.Rc7 in about 15 seconds. in another 10 sec saw that Q could not protect the B on b7 as well as prevent deadly Q-K fork from the N at f4.

personal result: Success!

Apr-06-09  David2009: Going back to the original game, can Black cling on with 25...Nd8 instead of 25...e5?
Apr-06-09  GreenFacedPatzer: Missed it. :(

Spent my time looking for a Monday mate in 2 or 3, or a some devestating sacrifice, couldn't make anything work.

Oh, well, there's always Tuesday. :S

Premium Chessgames Member
  benveniste: After 26. ... ♕b4, white can force mate with ♘e6+ ♔g8 ♗e8! Black can squirm a bit, but once the knight is forced off of f7, mate is inevitable.
Apr-06-09  CHESSTTCAMPS: <agb2002:> wrote <It seems that this is not my day. In my line D, Black can play 28... Qxd4+ (instead of 28... Qe1+) but after 29.Nxd4 Nxh6 30.Ne6 Nf5 (30... Nf7 31.Be8 h5 32.Bxf7+ Kh7 33.Rxb7) 31.Be8 h5 32.Be6 White captures the knight and the bishop.>

I believe your final move was intended to be 32.Bg6.

For reference, the above line starts with this position:

click for larger view

...and ends with this position:

click for larger view

Whether it's your day or not, this is still the most interesting tactical find in the puzzle. From the 2nd position, best play is probably 32... Rh6 33.Bxf5 Ba6 34.Rxa7 Bc4 35.h4 where black is almost completely immobilized.

Apr-06-09  patzer2: For today's easy Monday puzzle solution, 26. Rc7! wins a piece due to the threat of a Knight Fork.
Apr-06-09  WhiteRook48: I can't believe I missed this!
Apr-06-09  CHESSTTCAMPS: <benveniste:> wrote <After 26. ... Qb4, white can force mate with 27.Ne6+ Kg8 28.Be8! Black can squirm a bit, but once the knight is forced off of f7, mate is inevitable.>

You're right, although ChessMaster finds that black can stave off mate for eight moves with 28...Qb1+ 29.Kf2 Qc2+ 30.Rxc2 Bc8 31.Rxc8 h5 etc. Of course, all of the moves 28.Rxb7, 28.Qh6, and 28.Be8 win handily for white, but 28.Be8 is the most efficient.

Apr-06-09  tivrfoa: yeah!
but it is not very easy!
Premium Chessgames Member
  OhioChessFan: A little tough for a Monday. I couldn't figure out how to sac the Queen. ;)
Apr-06-09  TheBish: Adams vs S Vanderwaeren, 1994

White to play (26.?) "Very Easy"

White wins easily with 26. Rc7!

Now Black has a handful of replies, all losing a little differently:

A) 26...Qxc7 27. Ne6+ wins the queen.

B) 26...Qb4 27. Ne6+ Kg8 28. Qh6! Qb1+ (or 28...Qe1+ 29. Bf1) 29. Bf1 Nxh6 (or 29...Qg6 30. Qf8#) 30. Rg7 mate.

C) 26...Qd6 27. Rxb7 exf4 28. Qe8+ Kg7 29. Qxf7+ Kh6 30. Qg7+ Kh5 31. Qxh8 and mate is around the corner.

Apr-06-09  LIFE Master AJ: I got it, but I have to agree with TheaN (and others). WAY TOO COMPLICATED FOR A MONDAY PUZLLE!!!!

Or are they changing the scale? If so, I should shoot myself before the weekend!

Apr-06-09  Milesdei: Glad to see I wasn't the only one confounded by this "very easy" puzzle. Not much comfort in that, however, but some. I couldn't stop trying to figure out ways to make the triple fork after Ng6 work, but clearly the fork was on the queen side. God do I feel stupid.
Apr-06-09  LIFE Master AJ: <milesdei>
You should not feel stupid, a player ... who has a 1800+ Internet rating and comes to our chess club ... thought about this one for close to 30 minutes tonight, and then gave up.
Apr-07-09  Crowaholic: <Of course, all of the moves 28.Rxb7, 28.Qh6, and 28.Be8 win handily for white, but 28.Be8 is the most efficient>

And since after 28. Qh6 Qxd4+ 29. Kf1 Qd1+ 30. Kf2 Qd4+ 31. Kg3 (the only good way out of Black's perpetual check), Black can trade queens with Qf4+, 28. Qh6 clearly does not deserve the exclamation mark others have given it, even though it's winning.

According to computer analysis (Deep Shredder 11), 28. Be8 is best (+#8), 28. Rxb7 follows closely at +#9, whereas 28. Qh6 doesn't even appear to be a mate in 20.

Premium Chessgames Member
  Peligroso Patzer: <benveniste: After 26. ... ♕b4, white can force mate with [27.] ♘e6+ ♔g8 [28.] ♗e8! Black can squirm a bit, but once the knight is forced off of f7, mate is inevitable.>

<OhioChessFan: A little tough for a Monday. I couldn't figure out how to sac the Queen. ;)>

In the line given by <benveniste>, White can play the Queen sacrifice <28. Qh6!!?> and if Black accepts (<28. … Nxh6?>), then White mates instantly with <29. Rg7#>.

Of course, <28. Qh6!!?> isn’t really White’s best here since it allows Black to play <28. … Qxd4+>, forcing either a trade of Queens (after <29. Nxd4> Black can play <29. Nxh6> without allowing mate-on-the-move) or a series of annoying checks (if White does not immediately take the Queen when it plays to d4) that can only be stopped by eventually allowing the Queen trade as described above (when the Black Queen returns to d4 with check). After the Queen trade, White will emerge with an extra piece (so <28. Qh6!!?> does win by force).

Bottom line (FWIW): I think this counts as a Queen sac in the <26. … Qb4> variation.

Premium Chessgames Member
  HeMateMe: mick Adams got a lot of play for that sacrificed pawn!
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