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Eduard Prandstetter vs Vlastimil Hort
CSR-ch (1984), Sumperk CSR, rd 11, Jul-??
Scotch Game: Potter Variation (C45)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
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Apr-22-14  morfishine: White's rook on <f1> is overloaded protecting <f3> and the back rank

26...Bg1+ 27.Rxg1 Nxf3+ 28.Kh1 Rxh3#

*****

Apr-22-14  zb2cr: Clever little device. 26. ... Bg1+! Now, if White plays 27. Kh1, Rxh3#. And if White plays 27. Rxg1, a further point emerges: 27. ... Nxf3+; 28. Kh1, Rxh3#.
Apr-22-14
Premium Chessgames Member
  Oxspawn: Knights are fearsome opponents, but when pinned they might as well be bishops or even pawns, for all the side-stepping tricks they can get up to. The black rook on the g file nicely isolates the white king from other defenders and prevents the king moving to defend the f pawn. The rook on f1 is overworked and underpaid.

26 Bg1+
Sacrificing itself in style by landing on a square defended by four pieces (if you count the king and the remote rook).

If
27. Rxg1 Nxf3+
28. Kh1 Rxh3 is mate
If 27. Kh1 Rxh3 same outcome only quicker.

Apr-22-14  CC0112358: White is one pawn down

26.......Bg1+
27. Rxg1 Nxf3+
28. Kh1 Rh3#

Apr-22-14  mel gibson: An easy one today but it still took me a few minutes.
Apr-22-14  patzer2: Positions like today's Tuesday puzzle (26....?) are excellent for teaching the rules of the game and basic tactics to beginners, with a conversation that might go as follows:

Teacher: Here's a position awaiting Black's 26th move from chessgames.com. What kind of forcing moves (checks or captures) are available to Black?

Student: He has two checks with capture (26...Nxf3+ and 26...Rxh3+) and two checks without capture (26...Bg1+ and 26...Rg2+).

Teacher: Very good! Now which of those captures most restrict the King's freedom (i.e. with the least number of free squares to move to afterwards)?

Student: The Rook checks (26...Rg2+ and 26...Rxf3+) leave the King at least two free squares, but the Bishop (26...Bg1+) and Knight checks (26...Nf3+) leave him only one free square.

Teacher: Excellent observation! So let's look at those restricting Bishop and Knight Checks. Which one of those checks allows us to follow-up with the other minor piece restricting check afterwards?

Student: With 26...Nxf3+ 27. Rxf3 the Black Bishop has no checks, but after 26...Bg1+ 27. Rxg1 Nxf3+ we get the one-two punch follow-up check.

Teacher: That's right! Now visualize the position after 26...Bg1+. Other than 27. Rxg1, what other choices does White have to get out of check?

Student: He can move the King after 26...Bg1+ to 27. Kh1.

Teacher: Good! Now can you visualize the position after 26...Bg1+ 27. Kh1?

Student: Yes! I see it's mate after 26...Bg1+ 27. Kh1 Rxh3#.

Teacher: That's right! Now why couldn't White play 26...Bg1+ 27. Nxg1?

Student: Because the Knight is pinned, and you can't move a pinned piece and expose your King to check.

Teacher: Correct! Capturing a checking piece is one way to get out of check, but pinned pieces protecting their King (a.k.a. absolute pins) can't move (let alone capture).

Now I want you to visualize the position after 26...Bg1+ 27. Rxg1 Nxf3+. Have you got it?

Student: Yes, I see it now. After 26...Bg1+ 27. Rxg1+ Nxf3+ the King is forced to play 28. Kh1 and now Black can play 28...Rh3#.

Teacher: Yes mate-in-two or three with the sham sacrifice of the Bishop! You've got it!

P.S.: Even though it's only a basic two and three move mate, the combination involves the decoy, deflection (removing the guard) and pin tactics.

Apr-22-14  Castleinthesky: A good Tuesday puzzle. It's also a very good game on piece positions and lane closure.
Apr-22-14
Premium Chessgames Member
  gawain: Not hard, but very very dramatic. That bishop comes swooping in from his hiding place on a7 to deliver the crushing blow.
Apr-22-14  BOSTER: <Once: A good offence wil always beat a good defence.>

This is too far to be the truth.

Apr-22-14  sombreronegro: Looks like a lesson in light square weakness as well. After black neutralizes the fianchetto bishop. 14 h4 gives them up completely entrenching the knight on g4. Then it ends horribly because of weak f3 and h3 squares. Its also another reason why a fianchetto bishop in king pawn games can be trouble since f3 is permanently weak.
Apr-22-14
Premium Chessgames Member
  kevin86: The blow comes from an unexpected source : a bishop at a7.

Mate in three:26...♗g1+ 27 ♖xg1 ♘f3+ 28 ♔h1 ♖xh3#

Apr-22-14  PJs Studio: I'm not going to lie. Bg1+! Took me over a minute. I kept trying to see how black could cover g3 for the Rook on g8 - Nope. Then looked at Ng4 which does cause white a problem IF he doesn't play Kg3! So that's no good.

Bg1 overloads whites rook on f1 nicely. 1-0

Apr-22-14  JimNorCal: I thought this one was surprisingly easy...then I realized that by chance it was featured on my iPad's "Daily Chess Puzzle" app a few days ago.

Quite a pretty mate!

Apr-22-14  11thHeaven: This one really took me a while, actually.
Apr-22-14  PJs Studio: Stepping back into the game. I suspect I would have played 18...Ne3?! following up with 19...Qxh3. But, it doesn't add to blacks game enough. The doubled e pawns and control of the a7-g1 diagonal are fine but this allows white out of his straight jacket.

Looking at Hort's continuation 18.Ng6 surprised me. So I checked it against my silicon monster and 18...Ng6 is fine!

But it found the far better: 18...Nxf2!! After 19.Nxf2 Qh3 20.Nd2 Rg8 21.Ra3 Qh4 Black's recovered the piece with an extra nub and massive kingside pressure.

Damn silicon monsters makin' me look stoopit!

Apr-22-14  gars: More of a Tuesday POTD than a Monday one, me thinks.
Apr-22-14  MountainMatt: Ahh yes - 26...Bg1+! Haven't been seeing these puzzles too well lately, but today this jumped right out. 27. Rxg1 Nxf3+ 28. Kh1 Rxh3#
Apr-22-14
Premium Chessgames Member
  Penguincw: 26...Bg1. Well that was simple enough. :| I thought the solution lied somewhere with 26...Ng4+.
Apr-22-14  BOSTER: When you began the game like this


click for larger view

White to play 9.
violating the basic principles , it is not strange that you finished game like POTD
less than 20 moves.

Apr-22-14  Mating Net: Deflection moves are so elegant, they strike like cobras on unsuspecting prey.
Apr-22-14  Ratt Boy: This one took me WAY longer than it should have. I was looking at stuff like Rxh3+, Ng4+...walked away and took a third look after several hours. Give me a B-, if that.
Apr-22-14  Patriot: 26...Bg1+

27.Rxg1 Nxf3+ 28.Kh1 Rxh3#

27.Kh1 Rxh3#

Apr-22-14  Patriot: <patzer2> Very nice post (and lesson)!
Apr-22-14
Premium Chessgames Member
  thegoodanarchist: <Ratt Boy> Are you the sidekick of the superhero <Rodent Man>?
Apr-22-14  patzer2: <Patriot> Thanks! It's similar to the approach I use in teaching Chess tactics to my Grandchildren.
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