[Event "Corus A"]
[Site "Wijk aan Zee NED"]
[Date "2008.01.26"]
[Round "12"]
[White "Adams, Mi"]
[Black "Polgar, Ju"]
[Result "0-1"]
[ECO "C42"]
[WhiteElo "2726"]
[BlackElo "2707"]
[Annotator "Regan,Kenneth"]
[PlyCount "97"]
[EventDate "2008.01.12"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8.
Nc3 Bf5 9. Re1 Nxc3 10. bxc3 Bxd3 11. Qxd3 O-O 12. Rb1 Na5 13. Qf5 Re8 14. Bf4
g6 15. Qh3 Nc4 16. Ne5 Bd6 17. Nxc4 Bxf4 18. Rxe8+ Qxe8 19. Qf3 dxc4 20. Qxf4
Qe2 21. h3 b6 22. Qf3 Qxf3 23. gxf3 a5 24. Re1 Kf8 25. Re4 Re8 26. Kf1 f5 27.
Rxe8+ Kxe8 {One of the most complicated K+P endings between top-level players
in memory. An analyst would wish to have Nimzovich and Kmoch, poets of pawn
structures, at the table, but GM Mihail Marin in his Wijk round-12 report for
ChessBase.com (link) gave a deep analysis in one day's time without them.} 28.
f4 $5 {In an endgame, every Pawn advance comes with a cost. This move seems to
make f2-f3 incumbent later, to deny Black's King access from d5 to e4, but
then the e3 square becomes a hole. The reader may still try to deepen GM
Marin's analysis of 28.Ke2 in place of this rightly-queried move. We believe
with Marin that it holds, but do not know---and do not know whether the
surprise drawing idea we give at Move 33 and later is needed here. But we do
know that your White defense will appreciate having a pawn at f2!} (28. Ke2 f4
({On} 28... Ke7 29. Ke3 Kf6 {,} 30. Kf4 {tries to work around GM Marin's idea
of Black forcing f4 by White, and I leave this still unclear.}) 29. Kd2 g5 (
29... Ke7 30. Ke2 Kf6 31. Ke1 Kg5 32. Kf1 Kh4 33. Kg2 g5 34. Kh2 h6 35. Kg2 h5
36. a3 b5 37. Kh2 g4 38. fxg4 hxg4 39. hxg4 Kxg4 40. Kg2) ({Deep Fritz 10:} 
29... Ke7 30. Ke2 b5 31. Kd2 h5 32. Kd1 h4 (32... Kf6 33. Ke2 Kg5 34. Kf1 b4
35. Kg2 (35. cxb4 axb4 $19 {Deep Fritz 10:} 36. Kg1 Kf6 37. Kf1 Ke6 38. Ke2 c3
39. Kd3 Kd5 40. Ke2 Kxd4 41. Kd1 Kc4 $19 {Black crashes thru on b3 at the
right tempo because White's King cannot triangulate on the back row---this
does not even need ...h4 to make a reserve tempo ...g5.}) 35... bxc3 36. Kf1 {
Deep Fritz 10:} Kf5 37. Ke1 Ke6 38. Kd1 Kd5 39. Kc1 Kxd4 40. Kd1 Ke5 41. Ke2
Kf5 42. Ke1 g5 43. Kf1 $1 {Here, the only move!} (43. Ke2 g4 44. hxg4+ hxg4 45.
Kf1 g3 $19) 43... c6 44. Kg2 $1 {And now, can Black do anything?} (44. Ke2 g4
$19) (44. Ke1 g4 $19)) 33. Kc1 Ke6 34. Kd1 a4 35. Ke2 c6 36. Kf1 Kd5 37. Ke2 c5
{[%eval -372,24]}) 30. Ke2 Kd7 31. Kd2 Kc6 32. Kc1 Kb5 (32... Kd5 33. Kd1 b5
34. Kd2 c6 35. Ke1 b4 36. Kd2 c5 37. dxc5 Kxc5 38. Kc1 bxc3 39. Kd1 Kd5 40. Ke2
Ke5 41. Kf1 Kf5 42. Ke1 h5 43. Kd1 {
To avoid a Zugzwang; 43.Kf1 is equally good.} (43. Ke2 $2 g4 44. hxg4+ hxg4 45.
fxg4+ (45. a4 g3 46. fxg3 fxg3 47. Kf1 Kf4 48. Kg2 Ke3 $19) 45... Kxg4 46. Kf1
Kf3 47. a4 Ke4 48. Ke2 Kd5 49. Kf3 Ke5 50. Ke2 Ke4 {An important tempo-gain}
51. Ke1 Kd4 52. Ke2 Kc5 53. Kf3 Kb4 54. Kxf4 Ka3 {
WK cannot get back to guard c2!} 55. Ke5 Kb2 56. f4 Kxc2 57. f5 Kb3 58. f6 c2
59. f7 c1=Q 60. f8=Q Qe3+ $19) (43. Kf1) 43... g4 44. hxg4+ hxg4 45. fxg4+ Kxg4
46. Ke2 $11 {This position is mutual Zugzwang}) 33. Kb1 Ka4 34. Kb2 b5 (34...
h6 35. a3 Kb5 36. Kc1 Kc6 37. Kd1 Kd5 38. Kd2 Ke6 39. Kd1 Kf5 40. Ke2 h5 41.
Kd1 g4 42. hxg4+ hxg4 43. Ke2 b5 (43... g3 44. Kf1) 44. Ke1 gxf3 45. Kf1 Ke4
46. Ke1) 35. a3 h6 36. Ka2 b4 37. cxb4 axb4 38. axb4 Kxb4 39. Kb2 c3+ 40. Kc1
Kc4) 28... Kd7 29. Ke2 Kd6 (29... Kc6 30. Kd2 Kb5 31. Kc1 Ka4 32. Kb2 b5 33. a3
h6 34. h4 c6 35. f3 h5 36. Ka2 b4 37. axb4 axb4 38. Kb2 b3 39. cxb3+ cxb3 40.
c4 Kb4 41. d5 $11) 30. Kd2 Kc6 31. f3 {
Not to be criticized---Black can force it anyway at no cost.} (31. Ke2 Kb5 $1 {
Even better than 31...Kd5 given by Marin, though he was only trying to
demonstrate that Black can force the f3 move anyway---he gives a line where
White's attempt to hold onto e4 by playing Kf3 (from e3) gets punished.} 32.
Kd2 Ka4 33. Kc1 Ka3 $19 {White must not allow Black's King to come to a3.
Black can then liquidate the pawns on the a,b,c files with Black's King
controlling the third rank, and then pick up the d-pawn for free and/or munch
the f-pawns.}) (31. h4 $5 Kd5 32. f3 {again forced} (32. Ke3 b5 {
puts White in trouble}) 32... b5 (32... h6 33. Ke2 Ke6 34. Kf2 Kf6 35. Kg2 g5
36. hxg5+ hxg5 37. Kg3 {always holds. Thus White loses only when the King
cannot get to g3 after ...g5 is played, as in the game.}) 33. Kc1 b4 34. Kb2 a4
$5 (34... bxc3+ 35. Kxc3 c6 36. a3 h6 37. Kd2 Kxd4 38. c3+ $11) 35. Kc1 bxc3 (
35... a3 36. cxb4 Kxd4 37. Kd2 c3+ 38. Ke2 $11) 36. Kd1 Kxd4 37. Ke2) (31. Ke3
Kb5 {wins as with 31.Ke2.}) (31. Kd1 Kd5 32. f3 {forced}) 31... Kd6 32. Ke3 Kd5
33. Ke2 {Marin's key position, in which we introduce a key idea. Usually
creating an outside passed pawn for the opponent is suicide in a King and Pawn
ending. In this ending, however, doing so gives White's King counterplay along
the a- and h-files, and the position is blocked enough to slow the other
King's usual mayhem on the other wing. This "Suicide Draw" idea refutes
Marin's analysis and winning assessment of the rest of the endgame. It also
exemplifies Marin's own stated caution about relying on chess engines, as Deep
Fritz 10 evaluates Black as over a Rook ahead in some of the drawn positions
that result!} Kd6 (33... b5 {Marin. I already started putting my own work at
later moves where things transpose, so it is convenient to put Marin's key
lines in isolation here.} 34. Kd2 {Forced} c6 (34... b4 35. cxb4 axb4 36. c3 {
and now Black must play carefully not to lose} c5 $1 37. dxc5 b3 (37... Kxc5
38. Kc2 Kb5 39. cxb4 Kxb4 40. Kb2 Ka4 41. Kc3 Ka3 42. Kxc4 Kxa2 43. Kd4 Kb3 44.
Ke5 Kc4 45. Kf6 Kd4 46. Kg7 Ke3 47. Kxh7 Kxf3 48. Kxg6 Kxf4 $11 {
OK, so Black is not in danger after finding the unique 36...c5}) 38. Kc1 bxa2
39. Kb2 $11) 35. a3 c5 36. dxc5 Kxc5 37. Kc1 b4 38. Kb2 $1 {KWR.} ({
Marin gives only} 38. axb4+ $2 axb4 39. cxb4+ Kxb4 40. Kb2 c3+ 41. Ka2 h6 42.
h4 h5 43. Kb1 Kc4 44. Ka2 Kd4 45. Kb3 Ke3 46. Kxc3 Kxf3 ({
Also good, and I think not requiring Marin's zugzwang position, is} 46... Kxf4
47. Kd2 (47. Kb4 g5 $1 48. c4 g4 49. c5 Ke5 $19 {
as Black will queen with check with WK on b6.}) (47. Kd4 Kxf3 48. c4 f4 49. c5
Kg3 50. c6 f3 51. c7 f2 52. c8=Q f1=Q $19 {Same comment as after 47...Kd4. Am
I missing Q+P vs. Q wins that would be impossibly long in practice because I
have the Nalimov 5-man bases installed, such as I've noted in one sideline
below? I don't think so.}) (47. Kd3 Kxf3 {transposes}) 47... Kxf3 48. c4 f4 49.
c5 Kg3 50. c6 f3 51. c7 f2 52. c8=Q f1=Q $19 {White has no checks to pick up
g6, and Q-endings 2 pawns down are almost all hopeless. Indeed I have
propagated a DF10 eval of +5.45 back to Black's 46...Kxf4 with little
difficulty.}) 47. Kd2 (47. Kb4 Kxf4 48. c4) 47... Ke4 $1 48. c4 Kxf4 49. Kd3 g5
$19 {Marin.}) 38... bxa3+ (38... bxc3+ 39. Kxc3 Kb5 40. Kb2 {Fritz 9:} Kc6 41.
Kc3 Kc5 42. h4 h6 43. Kd2 Kb5 44. Kc3 Ka4 45. Kxc4 Kxa3 46. Kd5 a4 47. c4 Kb3
48. c5 a3 49. c6 a2 50. c7 a1=Q 51. c8=Q) 39. Kxa3 {Fritz 10 instantly regards
White's 38.Kb2 as having blundered the equivalent of 2 pawns, and here gives
Black a usually-winning edge over 3 pawns, thinking 10 moves (20 ply) ahead
and beyond. But let Fritz think longer, and its evaluation will flatline to 0.
00. In chess terms, why? Black cannot force the a-pawn further than a4, so
Black's only plan is the usual one of running to the other wing. But White's
pawns at c3, f3, and f4 block any passage other than the Strait of Magellan at
g7, by which time White has gobbled up a5 and c4 and queened a c-pawn long
before. Thus Black's King can only tack around a5, and once the engine
enumerates enough moves to get a repetition in each branch, it sees the
positional reality of White's idea.} Kb5 40. Kb2 h6 41. h4 $11 {Starting Fritz
here gives "0.00" fairly quickly, usually without initial 3-pawns-up opinions.
But back at Move 38 those opinions may have hidden the presence of 38.Kb2 as a
viable option---a "human factor" along lines of papers by Brian Cantwell Smith
and others on limitations and risks of proving correctness by computers.
Further cases believed winning by Marin meet the same idea, and below we find
a new case where Deep Fritz 10 sometimes gives Black a score over 5 pawns
ahead, to depths well past 30, and yet the position is drawn!}) (33... c5 34.
dxc5 Kxc5 35. Kd2 Kb5 36. Kc1 Ka4 37. Kb2 b5 38. a3 h6 39. h4 h5 40. Ka2 b4 41.
axb4 axb4 42. Kb2 b3 43. cxb3+ cxb3 44. Ka1 $1 {
Or 44.Kc1! An option White doesn't have when there are also pawns at d4 and c6.
} (44. Kb1 $4 Ka3 45. Ka1 b2+ 46. Kb1 Kb3 47. c4 Kxc4 48. Kxb2 Kd3 $19) 44...
Ka3 45. Kb1 b2 46. c4 Kb4 47. Kxb2 Kxc4 48. Kc2 $11) 34. Kd2 Ke7 35. Ke3 Ke6
36. Ke2 {After some pre-time-control tacking, the key point in the actual game.
Because the "Suicide Draw" idea makes most of White's options viable after
moves other than 36...g5!?, we now regard Judit Polgar's choice as an
excellent practical one, especially pre-control and with White's 28.f4 having
already shown an aversion to letting Black play ...f4!} (36. Kf2 {
seems also to be OK} Kd7 (36... Kd5 37. Ke2 {
repeats Move 33---see analysis there}) 37. Ke3 c6 38. a3 Kd6 39. Kd2 (39. Ke2
b5 40. Kd2 Kd5 41. h4 {So this position is also a "Hard Zugzwang"---White to
move loses, but Black to move can never "rewind" it and only draws.} ({
Also holding is} 41. Kc1 b4 (41... Ke6 42. Kd1 Kf6 43. h4 $1 {denies Black ...
g5, which would pose danger because Black's h-pawn is back at h7 to preserve
tempos. But anyway allowing that is only fatal when also Black's c-pawn is
preserved back at c7, not c6.} (43. Ke2 g5 44. Kf2 gxf4) 43... Kg7 44. Ke1 Kh6
45. Kf2 Kh5 46. Kg3 h6 47. Kh3 g5 48. fxg5 hxg5 49. hxg5 Kxg5 50. Kg3 $11) 42.
Kb2 {Black cannot punish this with ...bxa3+ because the Black King has no
clear path to the K-side, unlike in lines where Black has played ...g5-gxf4.})
41... Kd6 42. Kd1 $1 {White can maintain a correspondence of squares.} c5 43.
dxc5+ Kxc5 44. Kc1 $1 {only move} b4 45. Kb2 $1 $11 {
This drawing motif becomes applicable after Black plays ...c5.}) 39... b5 40.
Kd1 $3 {Here, the only move to hold!} (40. Ke3 {loses!} c5 41. dxc5+ Kxc5 42.
Ke2 b4 $19) (40. Kd1 c5 41. dxc5+ Kxc5 42. Kc1) (40. Ke2 {[%eval -232,24]} c5
41. dxc5+ Kxc5 42. Ke1 b4 43. axb4+ axb4 44. cxb4+ Kxb4 45. Kd2 h6 $1 $19) (40.
h4 Kd5 $19 {Now this is Zugzwang!})) 36... g5 $5 {I now regard this as a fine
try, because I think the slower way with 36...Kf6 or etc. does not challenge
White as much. Of course after 36...Kf6 there are losing lines, but a "random"
line holds, and all White really needs is to realize that certain positions
with the Kings at d5 and d2 are Zugzwangs, together with the "Kb2!" idea after
Black has played ...c5. Plus avoid fxg5 opening the K-side when Black can
recapture in a way that prevents blocking on f4/h4. My main point supporting
this belief is that in addition to King moves holding, White can also play
actively a3 and/or h4, and these moves are neither weaknesses nor losses of
tempo.} (36... b5 37. Ke3 h6 (37... Kd5 38. Kd2 c5 (38... b4) (38... h6 39. a3)
39. dxc5 Kxc5 40. Kc1 b4 41. Kb2) 38. Ke2 Kf6 (38... g5) 39. Kf2 g5 40. Kg3) (
36... Kd5 37. Kd2 (37. a3 Kc6 38. Kd2 Kb5 39. Kc1 Ka4 40. Kb2 b5 41. d5 h6 42.
Ka2 (42. h4 h5) 42... b4 43. Kb2 bxc3+ 44. Kxc3 Kxa3) 37... Kc6 38. Kd1 Kb5 39.
Kc1 Ka4 40. Kb2 b5 41. a3 c6 42. Ka2 $11 (42. h4 h6 43. Ka2 b4 44. axb4 axb4
45. Kb2 b3 46. cxb3+ cxb3 47. c4 Kb4 48. d5 $11)) (36... h6 37. Ke3 g5 38. fxg5
hxg5 39. Kf2 $1 (39. f4 g4 40. hxg4 fxg4 41. Ke4 Kf6 42. f5 g3 43. Kf3 Kxf5 44.
Kxg3 Ke4 45. Kf2 b5 46. Ke2 b4 47. Kd2 bxc3+ 48. Kxc3 (48. Ke2 Kxd4 $18) 48...
Kd5 49. a3 c6 50. a4 c5 $19) 39... f4 40. Ke2 Kd5 41. Ke1 Kc6 42. Kd2 Kb5 43.
Kc1 Ka4 44. Kb2 c6 45. a3 Kb5 46. Kc1 Ka6) ({Black's steadiest try is:} 36...
Kf6 {We believe White's smartest way to hold involves playing a3 and/or h4
early, but we give a holding main line where White shuttles the King to
illustrate best the ideas in the position. The branch at 46.h4?, with a return
mistake 50...c5?, also leads to the most extreme successful case of the
"Suicide Draw" defense, whereby Deep Fritz 10 has given evals as extreme as -5.
22 beyond depth 30 in a drawn position!} 37. Kf2 (37. Ke3 {
loses, as in the game} g5 $1 (37... Kg7 38. d5) 38. Kf2 gxf4 (38... h6) (38...
Kg6 39. Kg3) 39. Kf1 b5 40. a3 Ke7 41. Ke2 Kd6 42. Kd1 (42. Kd2 Kd5 (42... c5
43. dxc5+ Kxc5 44. Kc1) 43. Kc1 b4 $19) 42... Kd5 43. Kd2 h6 44. Kc1 b4 45. Kb2
bxa3+ 46. Kxa3 Ke6 47. Ka4 Kf6 48. Kxa5 (48. Kb5 Kg5 49. d5 Kh4 50. Kc6 a4 51.
Kxc7 a3 {is the winning Q-ending again}) 48... Kg5 49. Kb5 Kh4 50. Kc6 Kg3 51.
Kxc7 Kxf3 52. d5 Ke2 53. d6 f3 54. d7 f2 55. d8=Q f1=Q 56. Qd4 Ke1 $1 57. Qh4+
Kd1 58. Qxh6 f4 $19) (37. Kd2 {loses} g5 38. Ke3 {
White is trying to say that the game continuation was a Zugzwang, but} Kg6 $1 {
renews it, and Black wins much as in the game from Move 37 onward.} 39. d5 h5
40. Kd4 g4 41. Ke3 Kf6 $19 {as in the game}) (37. h4 $5 {the only other
non-loser; not fully examined, but may be even clearer than my main lines} b5 (
37... h6 38. Kf2 {forced, to reach g3 in time} b5 39. Ke3 $1 (39. Ke2 {loses?}
g5 40. hxg5+ (40. fxg5+ hxg5 {transposes}) 40... hxg5 41. fxg5+ (41. Ke3 g4 42.
fxg4 fxg4 43. Ke4 a4 44. d5 a3 45. Kd4 Kf5 $19) 41... Kxg5 42. Ke3 a4 $1 43. a3
(43. Kf2 Kf4 44. a3 c6 {will transpose}) 43... c6 44. Kf2 Kf4 45. Ke2 Kg3 46.
Ke3 f4+ 47. Ke4 Kf2 48. Kxf4 Ke2 {It will take me ages to key in all WK moves,
but Black is winning. Deep Fritz 10:} 49. Ke5 Kd2 50. f4 (50. Kd6 Kxc2 51. f4
Kxc3 52. f5 Kb2 53. f6 c3 54. f7 c2 55. f8=Q c1=Q $19) (50. d5 cxd5 51. Kd4
Kxc2 52. f4 b4 $1 53. cxb4 c3 54. f5 Kb3 55. f6 c2 56. f7 c1=Q 57. f8=Q Qc4+
$19) 50... Kxc3 51. f5 (51. d5 cxd5 52. f5 b4 53. axb4 a3 54. f6 a2 55. f7 a1=Q
56. f8=Q Kxc2+ 57. Kxd5 c3 $19) 51... b4 52. axb4 (52. d5 bxa3 53. dxc6 a2 54.
c7 a1=Q 55. c8=Q a3 $19) 52... a3 53. f6 Kxc2 54. f7 a2 55. f8=Q a1=Q 56. Qf2+
{[%eval -161,23]} (56. Qg8 c3 $19) (56. Qf3 c3 $19) 56... Kb3 57. b5 (57. Qf7
Qg1 58. b5 Qg3+ $19 59. Ke4 cxb5 60. d5 Qd3+ {
The pins and cross-pins are pretty.} 61. Ke5 c3 62. d6+ Kb2 63. d7 c2 $19 64.
Qf5 Qe3+ 65. Qe4 Qxe4+ 66. Kxe4 c1=Q 67. d8=Q Qc5 $1 {
And Black only has to find 78 more moves like this to give mate...}) 57... cxb5
{So that White has a passer too, but it is pinned and Black's is a step faster}
58. Qe3+ (58. Qf3+ c3 $19) 58... c3 $19) (39. a3 {may also hold}) 39... g5 40.
hxg5+ hxg5 41. fxg5+ Kxg5 42. d5 $1 {Else loss Deep Fritz 10:} b4 43. Kd4 Kf4
44. cxb4 axb4 45. Kxc4 Kxf3 46. Kxb4 f4 47. a4 Ke4 48. Kc3 Kxd5 49. a5 c5 50.
a6 Kc6 51. Kd3 $11) ({Deep Fritz 10:} 37... Ke6 38. Kf2 Kd5 39. Ke3 Kc6 40. Kd2
b5 41. Kc1 Kb7 42. Kb1 Ka7 43. Kb2 Kb6 44. Kb1 Kb7 45. Kb2 Kb6 {[%eval -234,29]
}) (37... Kg7 38. Ke3 Kh6 39. Kf2 Kh5 40. Kg3 h6 41. d5 $11) 38. Ke1 Kg7 39.
Kf2 (39. h5 $5 {Too soon---here it loses} gxh5 40. Kf2 b4 41. Kg3 c6 $1 ({
Harum-scarum is} 41... bxc3 42. d5 $1 Kf6 43. Kh4 Ke7 44. Kxh5 Kd6 45. Kg5 Kxd5
46. Kxf5 Kd4 47. Ke6 Ke3 48. f5 Kd2 49. f6 Kxc2 50. f7 Kb2 51. f8=Q c2 52. Qb8+
{forced!} Ka1 $1 53. Qh8+ {forced!} Kxa2 54. Qc3 Kb1 55. Qxa5 c1=Q 56. Qb4+ Qb2
57. Qxc4 $11 {This position is dynamic but equal, as White's f-pawn is just as
good as Black's two pawns.}) 42. cxb4 (42. Kh4 Kg6 43. Kg3 bxc3 44. Kh4 a4 45.
a3 h6 46. Kg3 Kf7 47. Kh4 Ke6 $19) 42... axb4 43. Kh4 Kg6 44. Kg3 (44. Kh3 h4
45. Kxh4 c3 $19) 44... Kf6 45. Kh4 Ke6 46. Kxh5 c3 47. Kg5 h6+ 48. Kg6 h5 49.
Kg5 h4 50. Kxh4 Kd5 51. Kg5 Kxd4 52. Kxf5 c5 53. Kg6 c4 54. f5 b3 55. f6 (55.
axb3 cxb3 56. f6 bxc2 57. f7 c1=Q $19) 55... bxc2 56. f7 c1=Q 57. f8=Q Qd2 $1
$19) (39. Ke2 c6 40. Kf2 Kf7 (40... b4 $2 41. cxb4 axb4 42. Ke2 {
may win for White!})) 39... c6 (39... b4 40. d5 $1 $11) (39... Kh6 40. d5 $1
$11 {Deep Fritz 10:} b4 41. Kg3 Kh5 42. Kh3 bxc3 43. a4 Kh6 44. Kg3 {
[%eval 0,24]}) 40. a3 {At this point, the only move...} (40. Ke3 {loses} Kh6
41. Kf2 Kh5 42. Kg3 b4 43. cxb4 (43. Kh3 bxc3 44. Kg3 Kh6 $19) 43... axb4 44.
Kh3 Kh6 45. Kg3 Kg7 46. Kf2 Kf7 47. Ke2 Ke6 48. c3 c5 (48... bxc3 {
actually loses...} 49. a4 Kd6 50. Kd1 c5 51. d5 $3 {wins for White!} Kxd5 52.
Kc2 Kd4 53. a5 {Wild swings here from DF10} Kd5 54. a6 $18) 49. Kd2 b3 50. axb3
cxb3 51. dxc5 Kd5 52. c6 Kxc6 53. c4 b2 $19 54. Kc2 Kc5 55. Kxb2 Kxc4 56. Kc2
Kd4 57. Kd2 h6 58. Ke2 Kc3 59. Ke3 h5 60. Ke2 Kc2 61. Ke3 Kd1 $1 {
Black gained the opposition and is now winning!}) (40. Kf1 {loses} Kh6 41. Kg2
b4 42. Kf2 bxc3 43. a3 Kg7 $19) 40... Kf6 41. Ke3 (41. Ke1 Ke6 42. Ke2 {
is fine too}) (41. Ke2 Ke6 42. Ke1 {ditto}) 41... Ke6 42. Ke2 Kd6 43. Kd1 $1 {
The only move!} (43. Ke1 c5 $19) (43. Kd2 Kd5 $19 {is Zugzwang})) (37. Kf1 {
loses} g5 38. Kg2 gxf4 $19 {
*because* Black's h-pawn is on h7 and c-pawn is on c7}) 37... h6 {This move ena
bles Black to play ...g5-xf4 unless White has the nerve to hold with h4!?, but
costs Black the reserve tempo h7-h6, which is needed to win in the most
important cases where Black does win.} (37... Kg7 38. d5 $1 $11 {Fritz 9:} Kh6
39. Ke3 Kh5 40. Kd4 Kh4 41. Kxc4 Kxh3 42. Kb5 h5 43. Kc6 h4 44. Kxc7 Kg3 45. d6
h3 46. d7 h2 47. d8=Q h1=Q 48. Qd6 {[%eval 25,20]} Qxf3 49. Kxb6 Qxc3 50. Qxg6+
Kxf4 51. Qh6+ {This is a pretty immediate perpetual.} Ke4 52. Qh1+) (37... c6
38. Kg3 Kg7 39. Kh4 Kh6 40. Kg3 Kh5 41. h4 (41. Kg2 Kh4 42. Kh2 a4 43. a3 h6
44. Kg2 h5 45. Kh2 g5 46. fxg5 Kxg5 47. Kg3 h4+ $18) 41... Kh6 42. Kf2 Kg7 43.
Ke3 Kf6 44. Ke2 Ke6 45. Kf2 b5 46. Ke3 Kd5 47. Kd2 b4 48. cxb4 axb4 49. c3 $11
{I've reached this elsewhere---Black must play ...c5 now to draw.}) (37... g5
38. Kg3 Kg6 39. fxg5) (37... b5 38. a3 Ke6 39. Ke2 Kd5 40. Kd2) 38. Ke3 (38.
Kg3 {loses} Ke6 (38... g5 39. fxg5+ $11) 39. Kf2 {An example of my "general"
observation that WK must stay on the same file as BK in these toe-stepping
early stages.} Kd5 40. Ke2 (40. h4 $5 b5 $1 {
This wins without the 4Q excitement!} (40... Kc6 41. h5 gxh5 42. Kg3 {
This King race leads to 4 Queens with White to move, but losing!} Kb5 43. Kh4
Ka4 44. Kxh5 Ka3 45. Kg6 Kxa2 46. Kxf5 a4 47. Ke6 a3 48. f5 Kb1 49. f6 a2 50.
f7 a1=Q 51. f8=Q Qxc3 52. f4 {
If this doesn't work, then I agree with Fritz's eval.} Kxc2 53. f5 Qxd4 54. f6
c3 55. f7 Kb3 56. Qg8 c2 57. f8=Q (57. Qg3+ Qc3 58. Qxc3+ Kxc3 59. f8=Q c1=Q
$19) 57... c1=Q $19 {White goes first in the 4Q ending but has no attack.})) (
40. Ke3 Kc6 {transposes}) 40... Kc6 {wins. The idea of running BK to a4 was my
first one, and is unmentioned by Marin, but it requires truly delicate control
of tempo moves.} 41. Kd1 (41. a4 Kd5 {
Black pressures the K-side again, then plays ...b5.} 42. h4 (42. Kd1 g5 (42...
Ke6 {seems good too}) 43. fxg5 (43. Ke1 gxf4 $19) 43... hxg5 44. Ke1 c6 45. f4
b5 $1 $19 {Is this timing necessary?}) 42... Ke6 43. Kd2 c6 $1 {
Timing is everything! This rejoins the winning lines.} (43... Kf6 {Fritz 9:}
44. d5 $1 {and I don't se a win} (44. Ke2 c6 $19) 44... Ke7 45. Ke3 b5 46. axb5
a4 (46... Kd6 47. Kd4 a4 48. Kxc4 {wins...for White!}) 47. Kd2 Kd6 48. Kc1 Kxd5
49. Kb2 Kc5 50. Ka3 Kxb5 51. Kb2 $11)) (41. Kd2 Kb5 {transposes}) 41... Kb5 42.
Kc1 Ka4 43. Kb2 g5 44. fxg5 (44. a3 b5 $1 {wins} 45. d5 gxf4 46. h4 h5 {
The Zugzwang is finally achieved!}) 44... hxg5 45. Kc1 (45. a3 {loses} b5 46.
d5 f4 $19) (45. Ka1 Ka3 $19) 45... Ka3 {Brave!} 46. f4 gxf4 47. h4 f3 48. Kd2
Kxa2 49. h5 a4 50. h6 a3 51. h7 f2 $1 52. Ke2 Kb2 53. h8=Q a2 $19 {White has qu
eened first, but has no checks! Nor can White make a tempo for activity,
because ...f1Q+! will queen with check for Black. So I agree with Fritz 9's
"-5.98" here.}) (38. a3 $5 {too commital too soon? Or a tempo saved?} Ke6 39.
h4 {Here is a position with WK dangerously to the right of BK, and yet because
White has played a3 without Black already having played ...b5, White cannot be
punished. This in general the answer is evidently that a3 and h4 are good
moves for White, not weakening or squandering reserve tempos.} Kd5 40. Ke3 b5
41. Kd2 {forced} c5 42. dxc5 Kxc5 43. Kc1 b4 44. Kb2 $1 {The thematic defense
again---this time DF10 is not overlooking it but says "-0.01" right away.}) (
38. h4 $5 {transposes into 37.h4 h6 38.Kf2, which holds as well}) 38... g5 (
38... h5 39. h4 {locks up the house}) (38... b5 39. a3 {
This seems to restrict Black more than White.}) 39. Kf2 (39. h4 Kg6 40. hxg5
hxg5 41. Kf2 (41. fxg5 Kxg5) (41. d5 b5 42. Kd4 g4 43. fxg4 fxg4 44. Ke4 Kf6
$19 {transposes to the game}) 41... g4 42. Kg3 gxf3 43. Kxf3 Kf6 44. Kf2 Ke6
45. Ke2 Kd5 46. Kd2) (39. Ke2 h5 $1 (39... gxf4 40. Kf2 b5 41. a3 Ke6 42. Ke2
Kd5 43. Kd2 {Black doesn't have the move ...h6 here.} c6 (43... h5 44. h4 c6
45. Kc1) (43... b4) 44. Kc1 (44. h4) 44... b4 45. Kb2 bxa3+ 46. Kxa3 Ke6 47.
Ka4 $18) 40. Ke3 b5 41. a3 (41. d5 g4 42. fxg4 fxg4 43. hxg4 hxg4 $19 {Fritz 9:
} 44. Ke4 b4 45. f5 (45. Kd4 Kf5 46. Ke3 bxc3 47. a4 g3 $19) 45... g3 46. Kf3
Kxf5 47. Kxg3 Ke4 $19) 41... Kg6 $19) (39. d5 h5 40. Kd4 g4 41. fxg4 fxg4 42.
hxg4 hxg4 43. Ke4 b5 44. a3 (44. f5 g3 45. Kf3 Kxf5 46. Kxg3 Ke4 47. Kf2 Kxd5
$18) 44... Kg6 45. f5+ Kg5 46. f6 Kxf6 47. Kf4) 39... gxf4 (39... h5 40. Kg3
h4+ 41. Kf2 gxf4 {simply has less chances than 39...gxf4} (41... Kg6 42. Ke3 {
White takes and plays f4}) 42. Ke2 Ke6 43. Kd1 Kd5 44. Kc1 Kc6 45. Kb2 Kb5 46.
Ka3 c6 47. Kb2 Ka4 48. a3 b5 49. Ka2 b4 50. axb4 axb4 51. Kb2 b3 52. cxb3+ cxb3
53. c4 Kb4 54. d5 $11) (39... Kg6 40. Kg3 Kh5 41. h4 $1 {
is just another example of the main holding idea} gxh4+ (41... g4 42. fxg4+
fxg4 43. f5 $18 {is selfmate for Black}) 42. Kh3 $11) 40. Kf1 {White's King
need only avoid being caught one file to the right of Black's King, or two
files to the left, with Black to move.} (40. Ke2 {Deep Fritz 10:} Ke7 (40...
Ke6 41. a3 (41. Kf2 b5 42. Ke1 Kd5 (42... Kf6 43. a3 {
So I think Black can force White to play this} (43. Kf2 b4 $19) 43... Ke6 44.
Ke2 Kd5 45. Kd2 c6 (45... b4 46. cxb4 axb4 47. axb4 Kxd4 48. c3+ $11) (45...
Kc6 46. Ke1 Kd6 47. Kd1 $11 (47. Ke2 $2 {
Another carelessness of not opposing BK} c5 48. dxc5+ Kxc5 $19)) 46. Kc1 c5 47.
dxc5 Kxc5 48. Kb2 $11 {WK can still get to g2 in time.}) 43. a3 (43. Kd1) (43.
Kd2 b4 (43... c5 44. dxc5 Kxc5 45. Kc1 b4 46. Kb2 $11 {
Even without a3 in, this is fine.}) 44. cxb4 axb4 45. c3 $11) 43... b4 $19)) (
40... Kg5 41. Kf2 b5 42. a3 Kh4 43. Kg2 {
White simply has to defend, which makes the defense simple. Deep Fritz 10:} h5
{This removes all chances} 44. Kh2 Kg5 45. Kg1 h4 46. Kf2 Kg6 47. Ke1 Kf6 48.
Kd2 Ke6 49. Kc1 Kd6 50. Kd2 c5 51. dxc5+ Kxc5 52. Kc1 $11 {[%eval -232,31]})
41. Kf2 (41. a3) 41... b5 42. Ke1 Kd6 43. a3 {
White may need this to be already played earlier.} (43. Kd2) 43... c5 44. dxc5+
Kxc5 45. Kd2 {Once again WK is too late to come over, although DF10 didn't
understand this and actually gave a fail-LOW to Black in the depth=31 round
from thinking on 40...Ke7.} b4 46. cxb4+ axb4 47. c3 bxa3 $1 (47... b3 48. Kc1
Kd5 49. Kb2 Ke6 50. Ka1 Kf6 51. Kb2 $11 {
Black can go no further, since White's a-pawn moves too fast.}) 48. Kc1 Kd6 49.
Kb1 Ke6 50. Ka2 Kf6 51. Kxa3 Kg5 52. Kb4 Kh4 53. Kxc4 Kg3 54. Kd4 {
No other square for WK is any better.} Kxf3 55. c4 Kg2 56. c5 f3 57. c6 f2 58.
c7 f1=Q 59. c8=Q {should win for Black} Kxh3 $19 {EGTB-+ #28}) 40... Ke6 (40...
b5 41. a3 Ke6 42. Ke2 Kd5 (42... Kd6 43. Kd1 $1) 43. Kd2 $11 {Ah, the key is
that this position is a mutual "hard" Zugzwang, i.e. WTM loses, BTM only
draws!} (43. Kd1 b4 $19)) 41. Ke2 Kd5 (41... b5 42. a3 Kd5 43. Kd2 $1 {
is the same mutual-Zugzwang}) 42. Kd2 {
Not yet mutual Zugzwang---that comes with a3 and ...b5 played} (42. Kd1 b5 43.
Kd2 {now forced. White's omission of a3 is not punished, either.} b4 44. cxb4
axb4 45. c3 c5 $1 $11) 42... Kc6 43. Kc1 Kb5 44. Kb1 Ka4 45. Kb2 c6 (45... b5
46. h4 h5 47. a3 c6 48. Ka2 b4 49. axb4 axb4 50. Kb2 b3 51. cxb3+ cxb3 {
Indeed, unlike as in lines with the d4 and c6 pawns off, White cannot play Ka1
or Kc1 here, but does survive by c4! So there is a nice chess-problemist's
"switch" themeembeddedintheanalysis!} 52. c4 Kb4 53. d5 cxd5 54. cxd5 Kc5 55.
Kxb3 Kxd5 56. Kc3 $11) 46. a3 $1 ({5-Pawn Swing, this way-->} 46. h4 {
It is *very* instructive to note that this loses, because it deprives White of
a reserve tempo, even though it takes Black "forever" to wend the King back to
the center. BUT, DF10's main line from here with a 4.80 eval at very high
depth included the move 50... c5??, which throwsawaythewin!} Kb5 47. Kc1 Ka6
48. Kb2 (48. Kd2 Kb7 49. Ke2 Kc7 50. Kf2 (50. a3 a4 $19 {
Black wins the h-pawn with the reserve tempo ...b5}) 50... Kd6 51. Ke2 Ke6 {
Black just wins the h-pawn with all the reserve tempi ey has on the Q-side,
and it is decisive because BK comes unimpeded to the Q-side faster than WK can
counterattack via the h-file.}) 48... b5 49. Kc1 Kb7 50. Kb2 {
~~*But*, DF10's PV continued} (50. a3 Kc7 51. Kd2 Kd6 52. Ke2 Ke6 53. Ke1 Kf6
54. Kf1 Kf7 55. Kf2 Kg6 56. Kg2 Kh5 57. Kh3 a4 $19 {Ah, this also faults a
reserve tempo. Unlike the cases where Black played ...c5??, this case really
wins because when BK comes to ...d5 and ...b4 cxb4 Kxd4 is played, the
resulting bpawn is not passed.}) 50... c5 $2 (50... Kc7 $1 {Black's correct
winning line, in accord with the note written immediately on first entering
the move 46.h4.} 51. Kc1 Kd7 (51... Kd6 52. Kd2 Kd5 53. a3 h5 $2 {does not win}
(53... Ke6 $1)) 52. Kd2 Ke6 53. Ke2 Kf6 54. Kf2 Kg6 55. Kg2 b4 $19 {I have show
n this idea elsewhere, and Marin had it too---White never got a tempo for a3.})
51. dxc5 Kc6 {White must still carefully observe a correspondence of squares:}
52. a3 $3 {[%emt 0:00:00]} (52. Kc1 Kd5 $3 {
and White's lack of playing a3 makes Zugzwang unavoidable.} 53. c6 Kxc6 {
Deep Fritz 10:} 54. Kd1 (54. a3 Kc5 55. h5 Kd6 56. Kd2 Ke6 57. Ke2 Kf6 58. Kf2
Kg5 59. Kg2 Kxh5 60. Kh3 Kg5 61. Kh2 Kf6 62. Kh3 Ke5 63. Kh4 Kd5 64. Kh5 Kc5
65. Kxh6 b4 66. axb4+ axb4 67. cxb4+ Kxb4 68. Kg5 Kc3 69. Kxf4 Kxc2 70. Kxf5 c3
$19) (54. Kd2 Kc5 55. Kd1 b4 56. Kd2 Kb5 $19) 54... Kc5 55. Kc1 Kd5 56. Kb2 Ke6
57. a4 b4 58. cxb4 axb4 {OK, this really is winning for Black.} 59. h5 Kd5 60.
c3 b3 61. Kc1 Kc5 62. Kb1 {[%eval -496,28]}) 52... Kd5 53. Kb1 $3 Kxc5 54. Kc1
{White is ready to meet 54...b4 by 55.Kb2!, and at the same time will  force
Black to play ...a4 to win the h-pawn.} Kd5 (54... b4 55. Kb2 $1 {
works here too}) (54... Kc6 55. Kd2 $1 (55. h5 Kd6 56. Kd2 Ke6 57. Ke2 Kf6 58.
Kf2 Kg5 59. Kg2 Kxh5 60. Kh2 Kg6 $19 {
With Black's a-pawn on a5 not a4, the ...b4 breakthrough works.}) 55... Kd6 56.
Kd1 $1 Kd5 57. Kd2 $1) 55. Kd2 Kc6 56. Kd1 $1 Kd6 57. Kd2 Kd5 58. Kd1 $1 Ke5
59. Ke2 Kf6 60. Kf2 Kg6 61. Kg2 Kh5 62. Kh3 a4 63. Kh2 {Undoubtedly what DF10
has missed is that Black cannot win this position. (A human needs to fill in:
Black can run the King to d5 and play ...b4 cxb4+ Kd4, but after ...Kc3 or ...
Ke3 White's b-pawn runs too fast.)  Can readers compose "Suicide Draws" that
give more-extreme evals from engines?}) 46... b5 47. h4 $1 {Now this is safe,
with BK having walled himself in, and ...h5 produces a total K-side block.}) (
36... Kf7 37. Kf2 Kf6 {Is this Zugzwang?} 38. Kg3 {No. Because the move ...b5
is not in, Black cannot punish WK being offside here. Other White moves hold,
but the failure of Black to punish this one is the thematic point.} Ke6 (38...
b5 39. Kf2 {and now the only attempt to punish White rather than transpose is}
(39. a3 {does lose} Ke6 $19) 39... b4 40. d5 $1 g5 41. Ke3 h5 42. fxg5+ Kxg5
43. Kd4 Kf4 44. cxb4 axb4 45. Kxc4 Kxf3 46. Kxb4 f4 47. a4 {[%eval -20,20]} Kg2
48. a5 f3 49. a6 f2 50. a7 f1=Q 51. a8=Q Qb1+ 52. Kc3 Qe1+ 53. Kc4 Qe2+ 54. Kb4
Qxc2 55. Qc8 $11) 39. Kf2 Kd5 40. Ke2 {
repeats a position from the game, but we can ignore this} Kc6 41. Kd2 Kb5 42.
Kc1 Ka4 43. Kb2 h6 (43... b5 44. a3 h6 45. h4 h5 46. Ka2 b4 47. axb4 axb4 48.
Kb2 b3 $2 49. cxb3+ cxb3 50. d5 $1 {
wins for White---Black needs 1 more reserve tempo to pull this idea off.}) 44.
a3 {White cannot withdraw this King, but this holds.} ({Also good is} 44. h4
Kb5 45. Kc1 Kc6 46. Kd2 Kd6 47. Ke2 Ke6 48. Kf2 Kf6 49. Kg3) 44... g5 45. Ka2
$1 (45. fxg5 $2 hxg5 46. Ka2 c6 47. Kb2 b5 {
With the K-side open for entry by BK, this idea works.}) 45... gxf4 46. Kb2 {
and we reach the drawn lines with 36...Kf6}) 37. Ke3 $2 {The losing move} (37.
fxg5 $1 {Vladimir Barsky (http://www.chesspro.ru/_events/2008/weik24.html)
gave only analysis of this capture, but gave all that needs saying, including
the 47.Kb2! move which I (KWR) had also found.} f4 38. Kf2 Kf5 {Now Marin wrote
that unless White tries 39.h4, "Black would simply switch back to the
aforementioned plan"---but the "Suicide Draw" applies equally well in the
position that results.} 39. a3 (39. h4 Kg6 40. Kg2 Kh5 41. Kh3 b5 $1 42. a3 c6
{White must cough up the h- and g-pawns, and here the outside passer really
does win, because the Queenside is fluid rather than blocked. Marin continues:}
43. Kh2 Kxh4 44. Kg2 Kxg5 45. Kh3 h5 $1 46. Kg2 Kf5 47. Kh3 Ke6 48. Kh4 Kd5 49.
Kg5 (49. Kxh5 b4 $19) 49... b4 $1 50. cxb4 axb4 51. axb4 Kxd4 52. Kxf4 {
, and now} h4 $1 {eats f3 and then the Q-side.}) 39... Kxg5 40. Kg1 Kf6 (40...
h5 41. Kf2) 41. Kf2 Ke6 42. Ke2 b5 (42... Kd6 43. Kd2 Kc6 44. Kd1 Kb5 45. Kc1
Ka4 46. Kb2 {Black has other tries; are they worth anything?} b5 47. Ka2 b4 {
A case where this doesn't work...} 48. axb4 axb4 49. Kb2 b3 50. cxb3+ cxb3 51.
h4 h6 (51... h5 52. d5 {wins for White}) 52. h5 c6 53. c4 Kb4 54. d5 $11) 43.
Ke1 Kd5 44. Kd2 c5 45. dxc5 Kxc5 46. Kc1 b4 47. Kb2 $1 $11 {The Black pawn at
f4 plays the same blocking role as the White pawn at f4 in the first instance
of this defense after Marin's 33...b5.}) (37. Kf2 {loses, because Black has
the reserve tempo ...h6, and so can win by an instructive mutual-Zugzwang
position:} gxf4 38. a3 b5 39. Ke2 Kd5 40. Kd2 h6 $1 {This arises also in lines
with 36...Kf6 or 36...h6. Black to move only draws, but here White loses!} 41.
Kc1 b4 42. Kb2 bxa3+ 43. Kxa3 Ke6 {Starting Black's King from d5 not c5, and
having the c7-pawn to slow White's counterplay, makes all the difference.  For
full details see 37.Ke3 Kf6 38.Kf2.}) 37... Kf6 $1 {Now Black is winning, but
Polgar had to see the next move too, else 39.Kd4 would cause concern.} 38. d5 (
38. h4 $5 {This was the first "Suicide" idea I found and posted in Susan
Polgar's item http://susanpolgar. blogspot.com/2008/01/strongest-ever.html on
the day of the game, following it up with a puzzle to find a Black win. I
originally intended the solution to be that Black declines White's gambit, but
in fact accepting it wins too---having a pawn on f4 helps White but again the
Q-side is too fluid and Black wins the resulting Queen ending.} h6 $1 (38...
gxh4 39. Kf2 b5 40. Kg2 b4 {Black cannot gain time by defending h4 first.} 41.
Kh3 Ke6 42. Kxh4 bxc3 43. Kg5 c6 $1 {
The key time-gaining move, also stopping 44.d5+!} 44. a4 h5 45. Kxh5 Kd5 46.
Kg5 Kxd4 47. Kxf5 Ke3 48. Kg4 Kd2 49. f5 Kxc2 50. f6 Kb2 51. f7 c2 52. f8=Q
c1=Q $19 {Black's pawn on c4 is faster than White's pawn on f3.}) (38... g4 $1
39. fxg4 fxg4 40. Ke4 h5 41. d5 (41. f5 g3 $19) 41... a4 42. a3 Kg6 $19 {
also works}) 39. hxg5+ hxg5 40. Kf2 g4 41. Kg3 gxf3 42. Kxf3 Ke6 $19 {
The hole on e4 makes Black's breakthrough by ...b4 decisive.} 43. Ke3 Kd5 44.
Kf3 (44. a3 b5 45. Kf3 b4 $19) 44... b5 45. Ke3 b4 {Many moves win, even ...a4!
} 46. Kd2 bxc3+ 47. Kxc3 Ke4 $19) (38. Kf2 $1 {was the most trenchant try.
Black wins *because* the h-pawn is still back at h7!} gxf4 39. a3 (39. Ke1 b5 {
also transposes} 40. Ke2 (40. Kf2) (40. a3) 40... Kg5 41. Kf2 b4 42. Kg2 bxc3
43. Kf2 Kf6 44. Ke2 Ke6 $19) (39. Ke2 b5 {transposes}) 39... Ke6 (39... b5 {
This move order is fine too.} 40. Kf1 Ke6 {
etc., winning because of the reserve tempo ...h6}) 40. Ke1 {Fritz 9:} b5 41.
Ke2 (41. Kd1 Kd6) 41... Kd5 (41... Kd6 42. Kd1 Kc6 43. Kc1 (43. Kd2 Kd5 {
Zugs White without needing ...h6, which works out far worse for White}) (43.
Ke2 Kd5 {transposes into the main line}) 43... b4 44. cxb4 axb4 45. axb4 c3 $1
$19 {Bellissima!}) 42. Kd2 h6 $1 {The key mutual Zugzwang, where Black to move
would only draw but White to move loses.} 43. Kc1 b4 44. Kb2 bxa3+ 45. Kxa3 {
Fritz 9:} Ke6 46. Ka4 Kf6 47. d5 ({Fritz 9:} 47. h4 Kg6 48. Kxa5 Kh5 49. Kb5
Kxh4 50. Kc6 Kg3 51. Kxc7 Kxf3 52. d5 Ke2 $19) (47. Kb5 Kg5 48. d5 Kh4 {
transposes into 47.d5 Kg5 48.Kb5 Kh4}) 47... Kg5 48. Kxa5 (48. Kb5 Kh4 49. Kc6
a4 50. Kxc7 a3 51. d6 a2 52. d7 a1=Q 53. d8=Q+ Kxh3 54. Qd5 (54. Qd4 Qh1 $1 {
Nifty way to guard f4!} 55. Qd5 Kg3 $19) (54. Qc8 Qa7+ 55. Kc6 (55. Kd6 Kg2 56.
Kd5 Kxf3 57. Kxc4 {DF10 is sure making me work to get an eval over 4.00} Ke2
$19) 55... Qf7) (54. Qh8 Kg2 55. Qd4 Kxf3 (55... Qh1 56. Qxc4 {
oops! Not so good!}) 56. Qxc4 Qa7+ 57. Kc6 (57. Kd8 Kg3 $19) (57. Kc8 Qe3 $19)
57... Qe3 $19) 54... Qa7+ (54... Kg3 55. Qxf5 (55. Qxc4 Qa7+ 56. Kd6 (56. Kc6
Qa8+ 57. Kb5 (57. Kb6 Qxf3) 57... Qxf3 58. Qg8+ Qg4 $19) 56... Qb8+ 57. Ke7 (
57. Kd7 Qb7+ {had to enter this move, "hash-stiction" again from DF10}) 57...
Qb7+ {[%eval -215,24]} 58. Kf8 (58. Kd8 h5 $19) (58. Kf6 Qxf3)) 55... Qa7+ 56.
Kc6 Qa6+ 57. Kc7 Kxf3) 55. Kc8 (55. Kd8 Qe3 $1 56. Qxc4 Qxf3 57. Qb5 Qg2 $1 58.
Qxf5+ Qg4 $19 {and Black makes progress}) (55. Kd6 Kg2 56. Qxf5 (56. Qd4 Qb7
$19) 56... Qb6+ $19) 55... Qe3 $1 {Better, so throw out my 54...Kg3 line.} 56.
Qxf5+ Kg2 57. Qg4+ Kf2 58. Qh4+ Kxf3 59. Qh2 h5 $1 {Sophistication from DF10!}
60. Qxh5+ Kg2 $19 {OK, safe to say Black is winning now}) 48... Kh4 49. Kb5 Kg3
50. Kc6 Kxf3 51. Kxc7 Kg3 52. d6 f3 53. d7 f2 54. d8=Q f1=Q {
looks winning for Black} 55. h4 f4 56. Qd6 Qe2 {
and now DF10 wants to sac White's h-pawn, be my guest!} 57. Kb6 (57. h5 Qxh5
58. Qd4 Qh2 59. Qe5 h5 $19) 57... Qe3+ $19 58. Ka6 Kf2 59. Qxh6 f3) (38. a3 h5
39. h4) (38. Kd2 gxf4 {will transpose}) 38... h5 $1 (38... gxf4+ 39. Kd4 Kg5
40. Ke5 (40. Kxc4 Kh4 {Deep Fritz 10:} 41. Kb5 Kg3 42. Kc6 Kxf3 43. Kxc7 Kg2
44. d6 f3 45. d7 f2 46. d8=Q f1=Q {favors Black with the passer on f5}) 40...
Kh4 41. Kxf4 Kxh3 42. Kxf5 Kg3 43. f4 h5 44. Ke5 h4 45. f5 h3 46. f6 h2 47. f7
h1=Q 48. f8=Q Qe1+ 49. Kd4 Qd2+ 50. Kxc4 Qxc2 51. Qg7+ Kf3 52. Qf6+ Ke2 53.
Qe5+ Kd1 54. Qd4+ Kc1 $11) 39. a3 (39. Kd4 g4 40. hxg4 (40. Ke3 b5) 40... fxg4
41. fxg4 hxg4 42. Ke4 b5 43. f5 Kg5 44. f6 Kxf6 45. Kf4 a4 46. Kxg4 Ke5 $19) (
39. a4 g4 $19) 39... g4 40. fxg4 fxg4 41. hxg4 hxg4 42. Ke4 b5 43. f5 (43. Kd4
Kf5 44. Ke3 a4 $19) 43... Kg5 44. f6 Kxf6 45. Kf4 a4 46. Kxg4 Ke5 47. Kf3 Kxd5
48. Ke3 Ke5 49. Kf3 0-1

