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Peter K Wells vs Yoshiharu Habu
"Check to the Ooshoo!" (game of the day May-03-2016)
Essent Open (2005), Hoogeveen NED, rd 2, Oct-24
Semi-Slav Defense: Meran Variation (D47)  ·  0-1

ANALYSIS [x]

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< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Dec-04-16  mel gibson: White moves
21 Rh1 the computer says mate in 10

Instead
21 Be2-d3 gives a score of -3.70 for white depth 18.

& when I played it out
at 6 seconds per move white still loses
in an end game.

Dec-04-16
Premium Chessgames Member
  morfishine: Dazzling game, but <19.Qxb4> looks better for White protecting the d-pawn, at least temporarily
Dec-04-16
Premium Chessgames Member
  WorstPlayerEver: But zwhenz 19. Qb4 zthenz Bc7
Dec-04-16
Premium Chessgames Member
  Fusilli: <al wazir: Where's the win after 21. Rh3 ?>

What I see is that black recovers all the material, still has attack, and a 4-pawn material advantage. Writing only black's moves, since white's are all forced: 21...Qg1+ 22...Qf2+ 23...Qxf1+ 24...Qxg2+ and 25... Qxh3.

That must be why white went for 21.Rh1.

Dec-04-16  FairyPromotion: This brings the number of games featured as both <Game of the Day> & <(Sunday) Puzzle of the Day> to 101.

Check out these awesome games here: Game Collection: Insane Games (GotD & PotD)

Dec-04-16
Premium Chessgames Member
  agb2002: Black has two knights for a rook and a bishop.

White threatens fxe4 and Qxa7.

The dark squares around the white king look vulnerable. This suggests 18... Bg3+, 18... Bxh2 and 18... Ng3.

In the case of 18... Bg3+ 19.hxg3 Qxd4 20.fxe4 Nxe4 21.Rf1 and the attack seems to lose momentum.

-----

In the case of 18... Ng3 19.hxg3 Bxg3+ 20.Kd1 (20.Kf1 Qxd4 and mate in three) 20... Qxd4+ 21.Kc2 doesn't look very good for Black.

-----

In the case of 18... Bxh2:

A) 19.Rxh2 Qxd4

A.1) 20.fxe4 Nxe4

A.1.a) 21.Rh1 Qf2+ 22.Kd1 Rd8+ 23.Kc2 (23.Bd3 Rxd3+ 24.Bd2 Qxd2#; 23.Bd2 Rxd2+ 24.Kc1 Qc5+ 25.Kb1 Rxb2+ 26.Kxb2 Qc3+ 27.Kb1 Nd2#) 23... Qxe2+ 24.Kb1 (24.Kb3 Nc5+ 25.Kxb4 Nxa4 26.Kxa4 Rb8 and mate soon) 24... Nc3+ 25.bxc3 bxc3

A.1.a.i) 26.Qb3 Qd3+ 27.Qc2 Rb8+ 28.Bb2 Rxb2+ 29.Kc1 Qxc2#.

A.1.a.ii) 26.Bf4 Qb2#.

A.1.a.iii) 26.Qf4 Qd3#.

A.1.a.iv) 26.a3 Rb8+ 27.Qb4 Qd3+ 28.Ka2 Qc2+ 29.Bb2 (29.Qb2 Q(R)xb2+ 30.Bxb2 R(Q)xb2#) 29... Rxb4 and mate in two.

A.1.b) 21.Qa5 (to control d8) 21... Qg1+ 22.Bf1 Qf2+ 23.Kd1 Qxf1+ 24.Kc2 Rc8+ 25.Kb3 (25.Kb1 Qd3#) 25... Qc4+ 26.Ka4 Nc5+ 27.Qxc5 Rxc5 and mate next with b3 or Qb5.

A.1.c) 21.g3 (to control f2) 21... Qg1+ 22.Bf1 Qxh2

A.1.c.i) 23.Be3 Qxg3+ 24.Ke2 f4 with four pawns and attack for the piece looks winning for Black.

A.1.c.ii) 23.Qxa7 Rd8 looks also winning for Black. For example, 24.Bf4 Qxb2 25.Rd1 Qc3+ 26.Ke2 Qc2+ wins decisive material.

A.2) 20.Rh1 Qf2+ as in A.1.a.

B) 19.fxe4 Bg3+

B.1) 20.Kf1 Qxd4 and mate in three.

B.2) 20.Kd1 Qxd4+ 21.Kc2 (21.Bd2 Nxe4 22.Qc2 Rd8 wins two pawns at least) 21... Rc8+ 22.Kb3 (22.Kb1 Qxe4+ and mate in two) 22... Nxe4 and the threat Nc5# seems to win.

-----

I don't have time for more. I'd play 18... Bxh2.

Dec-04-16  R4f43l L3 M4550n: Beautiful game! I was lucky to access the position of the puzzle...
Dec-04-16
Premium Chessgames Member
  Jimfromprovidence: I kind of like 21 Qb5 as a defense.


click for larger view

It concedes the rook but protects the white bishop. It does not look like an easy win for black at this point.

Dec-04-16
Premium Chessgames Member
  Jimfromprovidence: Here is a great example of an all-out attacking game.

Nunn vs I A Nataf, 1999

Dec-04-16  YouRang: Brilliant, but I didn't see it.

The main idea I tried out was 18...Ng3 19.hxg3 Bxg3+ followed by ...Qxd4+ and ...Rc8+.

It looks like a king hunt, but in reality the king is leading me into an ambush. :-(

Dec-04-16  blackdranzer: I thought about Ng4 for so long...it seems like a good move.

Bh2 was missed completely..becoz I thought Bh2 Qb4 Nd5 and then what?

Dec-04-16  psmith: <JimfromProvidence> Stockfish thinks Black is up by about a full piece after 21. Qb5 Qg1+ 22. Bf1 Qxh1. White just doesn't have any good moves and his King is still exposed.
Dec-04-16  mel gibson: < Jimfromprovidence: I kind of like 21 Qb5 as a defense.

click for larger view

It concedes the rook but protects the white bishop. It does not look like an easy win for black at this point.>

DR4 64 bit chooses that too if given 6 seconds to find a move, but if given a lot longer it chooses the move below.

21 Be2-d3 gives a score of -3.70 for white depth 18.

Dec-04-16
Premium Chessgames Member
  steinitzfan: Beautiful game. The attack seems to be very well executed although I haven't threaded through all the variations with an engine. I guess it says good things about Shogi that someone can play Chess this well and still maintain an interest in both. I'll have to give it (Shogi) a try sometime.
Dec-04-16  5hrsolver: Totally missed it. Can't wait for Monday puzzle.
Dec-04-16
Premium Chessgames Member
  steinitzfan: Beautiful game. The attack seems to be very well executed although I haven't threaded through all the variations with an engine. I guess it says good things about Shogi that someone can play Chess this well and still maintain an interest in both. I'll have to give it (Shogi) a try sometime.
Dec-04-16
Premium Chessgames Member
  sfm: Incredibly brilliant.
Dec-04-16  5hrsolver: <Jim ----I kind of like 21 Qb5 as a defense. >

21...Rd8 seems to be winning.

Dec-04-16
Premium Chessgames Member
  sfm: There's something excessively brutal about 29.Kb1,c2+ 30.Kb2,c1Q++# so we must hope that Mr. Habu would have chosen 30.-,c1R+# instead.
Dec-04-16  stst: Quite a nice flow, if one can get the Q going. Now it's blocked by its N@f6. So set it to attack (probably a sac, if White chose to remove it first):

18.............Ng4

White has two choices, fxgN or fxeN

fxeN actually gave Black more resistance, tackle it first (but either way, Qh4+ is the response, later development differed):

(A)
19.fxeN Qh4+
20.Kd2 (if Kd1, gN to f2+ forks the R, White loses R... rest should be easy;) Rc8 sets a boundary, or shuts the door for the K to escape to the left.) 21.g3 strongest, drives the Q an disallow Bf4 , but Black got one more sq. for its Q -- Qg5+ 22.Ke1 (again Kd1 allows N fork, R lost) Rxc1+!! R-sac 23.RxR QxR+
24.Bd1 Qe3+
25.Kf1 Qf2#

The other choice:
(B)
19.fxgN Qh4+ (same)
20.g3 (again Kd1 allows N fork, R lost) or even worse, Kf1 is mated at once Qf2#, Bxg3+ 21.Kf1 Qh3+
22.Kg1 Bf2#

see....

Dec-04-16  Steve.Patzer: What happened to chrisowen?
Dec-04-16  YouRang: <Jimfromprovidence: I kind of like 21 Qb5 as a defense. >

Yeah, playing against a human (i.e. with higher chance of oversight) <21.Qb5> may be best.

White is crushed if black finds the best move, 21...Kh8!, but if black continues with the original threat: <21...Qg1+ 22.Ke2>


click for larger view

It is tougher and black must still find <23...Qf2+>, as 23...Qxh2? loses to 24.Bxe6+.

Dec-04-16  YouRang: <Steve.Patzer: What happened to chrisowen?>

He seems to have transcended to a higher level of mysticism.

Dec-04-16  Boomie: ->

Uh oh. Somebody broke <chrisowen>.

If there's anyone left who doubts that <chrisowen> is a bot...

Dec-05-16  PJs Studio: 24...Nc3(!!) Give me a break! That is OUTstanding! A difficult to see Mate in seven. Vicious.
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