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Bjorn Tiller vs Adam Kuligowski
Poutiainen mem (1983), Helsinki FIN, Sep-??
English Opening: Symmetrical. Anti-Benoni Variation (A31)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Mar-23-13  Patriot: <David2009> I beat the machine but it took a while with careful play! After the king went to c4, I played the Na3+ line, won the queen, and went on with a grueling game. Here's one of its final tricks:


click for larger view

1.Kg4 Rh4+ 2.Kf5 Rf4+ 3.Ke6 Rxf7 4.Kxf7 Kh7 5.g6+ etc.

Mar-23-13  ACEchess: Why do so many people play the English opening?
Mar-23-13  ACEchess: 35.♖xe6 was not easy to find.
Mar-23-13  morfishine: <cyclon> In the event of 39.Nd4+ <39...Kxb4> (or as in the game <41.Nd4+ Kxb4>, what I viaualized was a quick mate after 42.Qb5+ Kc3 43.Qd3+ Kb4 44.Qc4+

So in essence, I dismissed 39...Kxb4 for the wrong reason by not seeing Black's best moves! (For example, 41.Qd3+ 41...Kb2 in my line)

I never considered 40.a3+

Mar-23-13  mistreaver: Saturday. White to play. Very difficult. 35.?
White has a winning attack, but he has to break through, and find that move that will ensure him of the win. On first sight, i would go for the following:
A) 35 Rxe6+ fxe6 (else black gets mated)
36 Qg7+ Kd6
37 Nb5+ Kc6 (or Kd5 Qe5+ Kc6, and we return to the same line) 38 Qc7+ Kd5
39 Nc3+ Kd4
40 Qc5 is mate.
This seems reasonable, i don't see a good deviation for black, so i'm gonna go for it and check how it went. ---
Whoops, i missed that c4 square is not defended. Altough my intuition didn't betray me on this one, i should have sure analyzed more precise and less superficial. Altough in OTB game i would have probably found the mate, since one feels that mate exist somewhere, it is still disappointing and i award myself half a point for this one. Therefore, 5.5/6 this week.
Mar-23-13  BOSTER: The most important part of any combo is to find the idea.

In this <PTD> pos. we can try the idea to use unprotected black queen, the motif-that king and queen on the same line are not very save. To realize this plan we should put black king on the diagonal, g1-b7, or on the second rank, where black queen was moved on f2, and move white queen on the same line to skewer them.

35.Rxe6+ dxe6 (forced)-opening the way for white queen on the queen's side. 36.Qg7+ Kd6 37.Nb5+
if Kc6 38.Qc7+ Kd5 39.Nc3+ Kd4 40.Qc5#
if Kd5 38.Qe5+ Kc4 39.Na3+ Kxb4 40.Qb5+ Kc3 41.Qc4+ Kd2 42.Qc2+ Ke3 43.Nc4+ Kd4 44.Qxf2 and white win. Certainly, black king can choose other squares to dance with.

Of course, it is much easier to find the solution for today <POTD> if you know this. See diagram. White to play and win.


click for larger view

Mar-23-13
Premium Chessgames Member
  chrisowen: Kan in effect bad blow for black seeing rook is about to stomp all over g6 like a thief in the night 35.Rxe6+ in garner first call effect rooked,

downed across feeded 35...dxe6 other gestate a kf8,

grand is would hardly accomplish a lot peel over go-off the balls seize ar deffi shard f6 angle f7 reeling mate noob e7 gets hammered my esteemed friends it terrain pouring scorn queen see off in grinds again ban f6 or f7 either in aim snuff rook out edges 35...dxe6,

I on a gestalt queen in g7 positioned ripe for culling brew a ke7 sussed for,

see heffer 36...Kd6 fervere ascent now backs to at he wall ace benched 37.nb5+ pressed a kinder v is he gg win kd5 lights abreast linking fab paradise 38.Qe5+ binding back to fervious in some gall eon,

forthrig 38...Kc4 I to range boom in,

at our c6 lower the port-cullis man tow indeed and dominates 39.qxe6+ in mate 1 d6 over straight so blooming by c6 evasive swerve in Kc4 got by-cycled 39.Qc7+ or gist c3 awkward rag on b4 l0 wind sordid you ratchet or quench in elevatour de force.

Ostentatious leave in see huffed and puffed to get accounter c3 over now in chest queen knightd4+ in,

give a 41.Kc3 mate at 42.ne2+ in get for home straight born to run Kc2 up the flagpole blowed in bc4#

Mar-23-13  howlwolf: Puzzles seem easier this week. Got to 39 Nd4+ and figured there had to be a mate in there somewhere. I predict tommorrow will pick up the petty pace of the day by day and will require a lot of time, though perhaps not all that is recorded. Chris Owen has shaken things up and got me thinking poetical; I wonder if he/she took his/her nom de plume from the famous stripper in New Orleans, who last time I saw her still looked good, though perhaps only in the right light.
Mar-23-13  James D Flynn: White is 2 pawns up but Black has numerous threats such as B or Q taking on g2 followed by Kxd6 with a won endgame or 35….Qf1+ 36.Kh2 Qf4+ and Qg3 is forced because if 37.Qf2# and if the K retreats Black can either win the N on c3 or play Rdg8 piling up on g2. After 37.Qg3 Qxg3+ 38.Kxg3 Kxd6 with 2Rs against B and N Black has a won endgame. White needs to check and keep checking until he mates or counters all Black’s threats. 35.Rxe6+ dxe6 36.Qg7+ Kd6 37.Nb5+ Kc6(if Kd5 38.Qe5+ Kc4 39.Na3+ Kxb4 40.Qb5+ Kc3 41.Qc4+ Kd2 (if Kb2 42.Qb3+ Kc1 43.Qb1+ Kd2 44.Qc2+ Ke1 (Ke3 45.Nc4+ wins the Q) 45.Qc1 Rd1 46.Nc2+ Qxc2 47.Qxc2 Rd2 48.Qe4_Kf2 49.Qf3+ Ke1 50.Qf1# }42.Qd3+ 42.Ke1 Nc2+ and 43.Qxc2 Qxc2 leaving White with a winning material advantage is forced) 38.Qc7+ Kd5 39.Nc3+ Kd4 40.Qc5+ Ke4 41.Qxf2 with a winning material advantage.
Mar-23-13
Premium Chessgames Member
  whiteshark: Oh my, I didn't get it.
Mar-23-13  MountainMatt: I don't have a chance on Saturdays, but I thought I'd take a look see. Quite a mating net, this.
Mar-23-13  cyclon: < morfishine:> Thanks for your post. I just came home, tired and haven't analyzed it yet, but; First, Black didn't play the move -Kxb4 in the actual game. Secondly, how do you mate quickly after your line 43. Qd3+ and here Black plays 43. -Kb2 instead your proposal 43. -Kb4? I'm not claiming anything yet, just curious to know how you mate Black.
Mar-23-13  Patriot: <BOSTER> There is nothing easy about your diagram! It has a lot of reasonable looking moves with lots of permutations.
Mar-23-13
Premium Chessgames Member
  Sneaky: I thought to myself "I bet the answer is Rxe6+" and calculated absolutely nothing else :)
Mar-23-13  5hrsolver: Found a different route but it wins too

35.Rxe6+ dxe6 36.Qg7+ Kd6 37.Nb5+ Kd5 38.Qe5+ Kc4 39.Na3+ Kxb4 40.Qb5+ Kc3 41.Qa5+ Kb2 42.Qb4+ Kc1 43.Qb1+ Kd2 44.Qc2+ Ke1 45.Qc1+ Rd1 46.Nc2+ Qxc2 47.Qxc2 Bxg2+ 48.Qxg2 Rd2 49.Qf1#

Mar-23-13  morfishine: <cyclon> NP: In my first post, I noted that White repeated with with <39.Qc3+ Kd5 40.Qe5+ Kc4> In my line, I noticed (in Post Mortem) that the lines transposed 2-moves later: in other words, White was better playing 39.Nd4+ straight away; In any case, what I mentioned in my second post, was that I dismissed: <39...Kxb4> for the wrong reason by not seeing Black's best moves! (For example, 41.Qd3+ 41...Kb2 in my line)...I never considered 40.a3+
Mar-23-13  Abdel Irada: <PawnSac: The other possibility is that Tiller did a deliberate repetition to make the time control so he would have more time to look for the winning line, which makes perfect sense since blacks reply is forced and white does not lose control of the position.>

Noting the move number, I do not doubt it.

However, I did not mean to offer criticism; I was merely accounting for the insertion of two moves that altered the move-count. This was necessary to set up the question as to which discovered check was more efficient, because otherwise the line played might seem two moves slower than it actually was.

But I acknowledge that, in light of the time situation, "faltered" may have seemed judgmental; another and more neutral verb was probably in order. Certainly I intended no disparagement.

Mar-23-13
Premium Chessgames Member
  agb2002: White has knight and two pawns.

Black threatens 35... Kxd6 and 35... Qe1+ 36.Kh2 Qxc3.

How about extracting the king with 35.Qg7+:

A) 35... Ke8 36.Rxe6+ dxe6 37.Bb5+ Rd7 38.Qxd7+ Kf8 39.Qe8+ Kg7 40.Qe7+ followed by 41.Qxe6+ and mate soon. For example, 40... Kg8 41.Qxe6+ Kf8 42.Qf6+ Kg8 43.Bc4+ Kh7 44.Qe7+ Kg(h)6 45.Qg5+ Kh7 46.Bd3+ Be4 47.Bxe4#.

B) 35... Kxd6 36.Nb5+

B.1) 36... Kd5 37.Qe5+ Kc4 (37... Kc6 38.Qd6#) 38.Qc3+ Kd5 39.Qd3+ and mate in two.

B.2) 36... Kc6 37.Qc3+ Kb6 and White only seems to achieve perpetual: 38.Qc7+ Kxa6 39.Qa5+ Kb7 40.Qc7+, etc.

Another option is 35.Rxe6+ dxe6 (35... Kf8 36.Rf6+ Ke7 37.Qf7#) 36.Qg7+ Kd6 (36... Ke8 37.Bb5+ transposes to previous A line) 37.Nb5+:

A) 37... Kc6 38.Qc7+ Kd5 39.Nc3+ Kd4 40.Qb6+ Kxc3 41.Qxf2 Kxb4 42.Qb6+ + - [Q+2P vs 2R] with attack.

B) 37... Kd5 38.Qe5+ Kc4 (38... Kc6 39.Qc7+ transposes to A) 39.Nd6+ Kxb4 40.Qb5+

B.1) 39... Ka3 40.Qb3#.

B.2) 39... Kc3 40.Qb3+ Kd2 (40... Kd4 41.Qb6+ Kc3 42.Qxf2 Rxd6 43.Qc5+, etc.) 41.Qb2+ Kd1 (41... Ke1 42.Qc1#; 41... Ke3 42.Nc4+ wins the queen) 42.Qxf2 Rxd6 43.Qe2+ Kc1 44.Qc4+ Kd1 (else 45.Qb4+ and 46.Qxd6) 45.Qb3+ Kc1(d2,e1) 46.Qc3(b2)+ wins one of the black rooks.

I think I'd play 35.Rxe6+.

Mar-23-13  BOSTER: <Patriot> <There is nothing easy about your diagram>.

I didn't say that diagram which I gave is much easier. This is a big misunderstanding.

I don't think that many , who was lucky to find 35.Rxe6+, can find the solution to this diagram. Don't make a move, which sharply change the pos.,when you have no time. "To get it right requires patience and a good eye".

Mar-23-13  Conrad93: Actually, this entire combination is quite easy to see.
Mar-23-13  Patriot: <BOSTER> No misunderstanding. Sorry, I wasn't implying you said it was easy. I was only making a statement on the position--very difficult.

<I don't think that many , who was lucky to find 35.Rxe6+, can find the solution to this diagram. Don't make a move, which sharply change the pos.,when you have no time. "To get it right requires patience and a good eye".> I agree 100%--your position is much more difficult! I'm not sure if a good eye can solve that one though. Nor am I sure there is any principle that will help identify the correct move. It looks like it will take trial and error and a lot of time.

Jun-23-14  Rookiepawn: There's a mistake in either the ECO code or the description. A31 is "Benoni formation", not "Anti Benoni variation".
Jun-27-14  Albertan: According to my eco program in Chessbase 11 the eco code of this game is B41 which means the opening is the Sicilian: Kan variation and not an English Opening. See http://maskeret.com/cgi-bin/diapos....
Jun-27-14
Premium Chessgames Member
  perfidious: This is indeed a Sicilian by transposition, a double-edged anti-Kan line which was popular long ago: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 Nf6 6.Nc3.
May-15-16
Premium Chessgames Member
  whiteshark: The last move should indicate mate (#)
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