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Jonathan Penrose vs Carel Benjamin van den Berg
GBR-NED (1952), London ENG, rd 2, Jun-01
French Defense: Winawer. Poisoned Pawn Variation General (C18)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Apr-15-05
Premium Chessgames Member
  kevin86: An unusual tactic:The rook block.

The move is effective as it completely isolates black's king from its defense.Now,both the queen and rook are helpless to defend. The white queen and rook are free to mate and do so rather quickly.

In MASH-a show that takes place during the time of the gain,the was an item of equipment called,"PENROSE DRAIN".

"Penrose Drains Opponent of Defenses" would make a good pun-especially for MASH fans and/or surgeons.

Apr-15-05
Premium Chessgames Member
  pittpanther: I also considered 33 a6+ followed by Bf8. I think 33 Bf8+ is better but I think 33 a6+ still wins. Concerning the earlier post of 33. a6+ Ka8 34. Bf8 b4
and either
35. Qxb4 Qxa6
or
35.Bxb4 Rb8 (if 36.Bd6 Rb2 )

After 35 Qxb4 Qxa6 I think Qe7 is very strong for white. I do not think black can avoid being mated or suffering heavy material loss.

Apr-15-05  guitar2001: This move is Tal-like, akin to Tal's ...Bb1!! move...I'll leave you to find the game.
Apr-15-05
Premium Chessgames Member
  Marius: 35.Qc7+ Ka8 36.Qc6+ Kb8 37.Bd6# is more forced
Apr-15-05  dac1990: Yep, I would've played 33.a6+. Oh well.
Apr-15-05  Stonewaller2: If Black goes wrong with 33. a6+ ♔b6? 34. ♗a5+ ♔xa6 35. ♗d8+ dis. ♔b7 36. ♖c7+ ♔b6 37. ♕c5+ ♔a5 38. ♖xa7#. That's what I saw but couldn't find a win after 33. ... ♔a8.

Other points: in the text, after 33. ... ♔a6? 34. ♕d6+ ♔xa5 35. ♖a1# or 34. ... ♔a6? 35. ♖c6+ ♔xa5 36. ♕a2#. Saw something like that but not how to bring it about with ♗f8!

An appropriately "taxing" problem for April 15.

Apr-15-05
Premium Chessgames Member
  Marius: <Stonewaller2>
on 33 a6 + Kb6???? 34 Qa5#
Apr-15-05  Stonewaller2: Ha! True dat. But you have to admit my line has a certain Baroque charm, not unlike the instructions for Federal Individual Income Tax Form 1040 . . .
Apr-15-05  chadurang: Hi everybody. Nice to read your posts and learn from them.

It seems to me that white missed an earlier winning opportunity. Wouldn't 27 Rc1 have won material for white through a pin/skewer combination?

Apr-15-05  hintza: <chadurang> Hi, welcome to <chessgames.com>! <Nice to read your posts and learn from them.> Yes, that is what makes this place great!

:-)

<Wouldn't 27 Rc1 have won material for white through a pin/skewer combination?> No, 27.Rc1 (either rook) wouldn't win material because Black just plays 27...Kb7 defending the rook on c2 with the queen.

Apr-15-05  sanferrera: it is always tough when there is not a forced sequence. I got lost when I tried 33. Bf8 Ka8

and then what?? You have to check two complete plies (and better be sure you are not overlooking something!)to know that you are still winning!

Apr-15-05  who: <pittpanther> 33. a6+ Ka8 34. Bf8 b4 35. Qxb4 Qxa6 36. Qe7 Qb7 and white has no threats remember there is no pawn on a6 to support the white queen and c8 is double protected by the black queen and bishop.

could someone with a program do an analysis of 33. a6+ Ka8 34. Bf8 b4 i believe it will come out to less than 9.31 as crafty evaluates 34...Qxe5. Is it possible that a program prefers 34...Qxe5 to 34...b4 because it wins a pawn instead of losing one, so much that it doesn't even consider the further variations of 34... b4 ?

Apr-15-05  Boomie: Herr Fritz lists forced mates first so prefers a6+. After ♗f8 black can prolong it with ♕c4. However ♗f8 demonstrates an actual concept and is therefore more "artistic" than a6+.

The motif of blocking a rook with a bishop is more wonderfully demonstrated by Tal's ♗c7 vs Botvinnik: Tal vs Botvinnik, 1960

Apr-15-05  mellow: <<<< Yet another poor sap who picked 33. a6+
Apr-15-05  Boomie: <pittpanther> b4 is mate in 3 after ♕a4.
Apr-15-05  ferniebola: I think that black still has a chance after 33.Bf8 Rxf8 34.Qxf8 Qd3 (preventing the white queen from comming to a3) 35.Qe7+ Ka6 36.Rd6+ Kxa5 37.Qxa7+ Kb4 38.Qc5+ Kb3 and the two black passed pawns along with the mate threat in row 1 are good enough compensation.
Apr-15-05
Premium Chessgames Member
  samvega: But I think rather than giving immediate check, 33.Bf8 Rxf8 34.Qxf8 Qd3 35.Qd6
Apr-15-05
Premium Chessgames Member
  Richard Taylor: <samvega> Yes 35. Qd6 looks strongest.
Apr-15-05  Boomie: I'm so glad someone mentioned ♖xf8 because it allows a delightful little mate with 33... ♖xf8 34. a6+ ♔b6 35. ♖c6+ ♔xc6 36. ♕d6#
Apr-16-05
Premium Chessgames Member
  pittpanther: Thanks Boomie for pointing out Qa4 after b4 - it is a very good move. Also, concerning Who's post, after Qb7 Qe8 (or Qd8) is crushing.
Apr-16-05
Premium Chessgames Member
  samvega: <Boomie> That's funny, I had considered the related variation 33..Rxf8 34.a6+ Kb6 35.Qd6+ Ka5 36.Ra1# when I solved the puzzle, then went ahead and gave a silly reply to <ferniebola>'s question. And thanks so much for posting the link to that Tal-Botvinnik game -- now a favourite in my Interferences collection.
Apr-16-05  who: <Bommie and Pittpanther> i can't believe i missed 35. Qa4 thanks for pointing it out <Boomie> as for
33. a6+ Ka8 34. Bf8 b4 35. Qxb4 Qxa6 36. Qe7 Qb7 37. Qe8+ Qb8 38. Qc6+ (otherwise 38...RxB) Qb7 39. Qe8+ is draw by repetition.
Apr-16-05  who: CM9000 decides the following
33.a6+ Mate11

1.a6+ Ka8 2.Bf8 Qxe5 3.Qc5 Bd7 4.Bd6 Qe8 5.Bb8 Qe1+ 6.Rxe1 Kxb8 7.Qd6+ Kc8 8.Rc1+ Kd8 9.Rc7 Ke8 10.Qxd7+ Kf8 11.Qxf7#

33.Bf8 Mate14

1.Bf8 Qc4 2.a6+ Kb6 3.Bc5+ Kc6 4.Bxa7Qxc1+ 5.Qxc1+ Kd7 6.Qc5 Rc8 7.Qd6+ Ke8 8.Bc5 Rxc5 9.Qxc5 f6 10.Qc7 Bc8 11.a7 Bd7 12.a8=Q+ Kf7 13.Qxd7+ Kg6 14.Qg8+ Kh5 15.Qgh7#

Apr-24-05  patzer2: White's 33. Bf8! neatly combines the obstruction and clearance tactic into a single winning move.
Nov-18-06  syracrophy: 33.♗f8!! What a beaut of move! Here's a puzzle with the same clearance idea:


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