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Wil van Lankveld vs John van der Wiel
HZ Open (2000), Vlissingen NED, rd 3, Jul-30
Modern Defense: Two Knights. Suttles Variation (B06)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 4 OF 4 ·  Later Kibitzing>
Jan-10-17  gofer: All rather <Easy>...

28 ... Rxa2+
29 Kxa2 Qxc2+ (Kb1 Qxc2#)
30 Ka3 Ra8+ (Ka1 Ra8#)
31 Kb4 Ra4#/Qc4#

Jan-10-17  leRevenant: This is more like what I expect on a Tuesday. Thanks, CG.
Jan-10-17  leRevenant: PS.Did someone once name this game the two van crash?
Jan-10-17  AlicesKnight: 28...Rxa2+ forces mate. If 29.Kb1 then....Qxc2#. So 29.Kxa2 Ra8+; 30.Kb1/2 (If Kb3,...Qc4+ forces back to the main line) ...Qb4+; 31.Kc1 Ra1#. The Black N and P at c6 prevent the white Q from interfering. <Phony Benoni>'s line also seems to win. Checking, I see the latter is the one chosen by the winner.
Jan-10-17  stacase: Easier than yesterday, Black had to say check to avoid 29.Qg7# and there wasn't some other line that went nowhere to waste time considering. Making sure that White's King couldn't escape to c1 was the only complication. All in all, it was pretty much Wham Bam Thank You Ma'am!

<https://www.youtube.com/watch?v=pWu...>

Jan-10-17  yadasampati: Really too easy. There is a mate threat, that can only be avoided (postponed) by giving a check. There is just one move giving check ...

So actually the problem here is equal to 1 + 1 = 2

Jan-10-17  yadasampati: <lost in space>: It seems you are not only lost in space but also in time. Today is Tuesday and not Monday :-)
Jan-10-17
Premium Chessgames Member
  thegoodanarchist: I envisioned 29.Kb1 Qb4+, also ending with mate (30.Kc1 Ra1#), but I found the correct moves for Black, so I am good with that result.
Jan-10-17
Premium Chessgames Member
  thegoodanarchist: <yadasampati: <<<Really too easy.>>> There is a mate threat, that can only be avoided (postponed) by giving a check. There is just one move giving check ...

So actually the problem here is equal to 1 + 1 = 2>

So it was "2" easy? :)

Jan-10-17  RonB52734: The fact that you are one move from being checkmated certainly focuses the mind!
Jan-10-17  Sularus: initially thought it's white's turn to move hehe.

anyway, RxP+ etc

Jan-10-17
Premium Chessgames Member
  whiteshark: Feels Monday-ish
Jan-10-17  Lambda: Yeah, this is a Monday-level puzzle. It's a short forced line in which you have to keep checking, and the most obvious check is always the correct one.
Jan-10-17  johngalt5579: Ra2,Ka2,Qa4,Kb1,Rb8,Kc1,Qa1,Kd2,Nc4 wins the WQ.
Jan-10-17
Premium Chessgames Member
  johnlspouge: A more interesting puzzle might have been

28?

White to move and force Black to find a way to mate him.

Jan-10-17
Premium Chessgames Member
  gawain: I saw the mating sequence via 28...Rxa2+ followed by 29...Ra8+ but missed the slightly more efficient 29 ...Qxc2+ Partial credit.
Jan-10-17  yadasampati: <thegoodanarchist>: Haha, indeed 1 + 1 = 2-easy. Nice observation. Actually there are 2 moves giving check (Rxa2+ and Rb1+), but the second one obviously leads nowhere. So maybe the the problem should be qualified as 3 - 1 = 2-easy ...
Jan-10-17
Premium Chessgames Member
  morfishine: Lets see, its the Rook take on <h7> followed by the Queen take on <f7> with check and with the board reversed
Jan-10-17  YouRang: Although the puzzle itself was easy, the moves leading up to the puzzle were interesting.

After <25.Qxd6>


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Black strikes with <25...Rxb2+!>, taking advantage of the potential K+Q knight fork (26.Kxb2? Nc4+ ), thus white must play <26.Ka1>


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Black's Nc5 is in take, but black gains a pawn and exchanges off the knight via <26...Nxc4 27.Nxc4 Qxc4>


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White still can't take the Rb2, but worse, white is facing threats that aren't easy to see from here, and frankly, white is already losing even if he does see them.

Just one example: If white sees the threat on Pa2 and guards it via <28.Qa3>, then <28...Rxc2>


click for larger view

Threatening ...Nc4 & Qe5+

<29.Rhe1 Qf4>


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Same threat: ...Nc4 & Qf6+; or if 30.Rf1, then ...Qxh6 followed by ...Nc4 & Qg7+

<30.Bf1> guarding c4 <30...Qf6>


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Threatening ...Nc4+ winning Q

<31.Kb1 Nc4 32.Bxc4 Rxc4>


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Black is up two pawns and has continuing attack on white's badly exposed king .

Of course, white didn't see the danger at all, and went for <28.Qf6?> hoping that the immediate Qg7# threat would force black to play defense.

Then comes <28...Rxa2+> as the solution to today's "black to play and mate in 4" puzzle.

Jan-10-17  stst: <leading up to the puzzle were interesting.>

Always Good to have an interesting fella delivering such interesting analyses, U really Rang!!

Pitty to have little time to go over...

Jan-10-17  RandomVisitor: As late as move 24 white has a comfortable game


click for larger view

Komodo-10.1-64bit:

<+1.64/36 24.b3> Rfd8 25.Ne2 Qh5 26.f4 Qxe2 27.fxe5 Qxe4 28.exd6 Qxd4 29.Rxd4 f5 30.Bg2 Ne6 31.Rd2 Kf7 32.a4 g5 33.Kb2 Rb6 34.Re1 Nf4 35.Re7+ Kg6 36.d7 Nxg2 37.Rxg2 g4 38.Rh2 g3 39.Rg7+ Kf6 40.Rh4 Rb7 41.Rc4 Ke5 42.Rxg3 Rbxd7 43.Rxc6 f4 44.Rg5+ Ke4 45.Rc4+ Rd4 46.Rc7 f3 47.Re7+ Kf4 48.Rgg7 R4d5 49.Rxh7 f2 50.Rhf7+ Rf5

Jan-10-17
Premium Chessgames Member
  morfishine: <YouRang: Although the puzzle itself was easy, the moves leading up to the puzzle were interesting> Yes, <25...Rxb2> was the "cruncher" leading to the final theme

*****

Jan-10-17
Premium Chessgames Member
  thegoodanarchist: < RonB52734: The fact that you are one move from being checkmated certainly focuses the mind!>

Love your avatar! Snoopy adjusting his tie? Snoopy taking a pledge? Whatever it is, I like Snoopy!

Jan-10-17
Premium Chessgames Member
  Bubo bubo: White threatens mate on g7, but Black is faster: 28...Rxa2+ with mate after either 29.Kxa2 Ra8+ 30.Kb3 Qc4+ 31.Kb2 Qb4+ 32.Kc1 Ra1# or 29.Kb1 Qb4+ 30.Kxa2 Ra8# / 30.Kc1 Ra1#
Jan-11-17
Premium Chessgames Member
  kevin86: Black throws up a Hail Mary! and mates under fire of being mated.
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