22 May 2023

Misevaluation

After fortune shined on me in the earlier rounds, I was paired against Michael Cambareri on board one in the final round of the Inland Empire Open. We led the field with 3.5 each, followed by several players with 3.0.

I reached a comfortable position out of the opening and early middle game, but then failed to understand the demands of the position.

Stripes,James (1821) -- Cambareri,Michael (2005) [A80]
Inland Empire Open Spokane (5), 21.05.2023

White to move

18.Qf7?!

18.Qh6 now, would have been wise.
18.Qxg6 did not feel safe. Anticipating 18...Rg8, I missed 19.Rxf6 Rxg6 20.Rxg6 when White is better.

18...Qd6 19.Qg7

19.Bxg6 Rh8 20.h3 Kc7 21.Bf5 would have kept the advantage, but I was reluctant to snatch a pawn on the file where my king stood.

19...Kc7 20.Qh6 Rh8

White to move

21.Qf4

Planned and forced. Most of White's advantage has slipped away.

21...g5! 22.Qxd6+ Kxd6 23.Rae1

I believed that I was still better, but Michael's rooks were coming to life with threats that I feared more than necessary.

Black to move
23...Rh4!

Michael's defense against my intended e4 break picks up a tempo for doubling on the h-file.

24.g3 Rh6 25.e4

Long-planned and finally played. It is the best move, although I no longer believed so as the game developed over the next few moves. I had the sense that I had thrown away an advantage against Michael, as I have done in so many games.

Black to move

25...dxe4 26.Bxe4 Rah8

26...Nxe4 simplifies the ending in White's favor. 27.Rxe4

White to move

27.Bf5?

Thinking, wrongly, that I was clearly worse, I desperately sought counterplay in a series of harassing checks.

I rejected 27.Rf2! because I did not know how to meet 27...Ng4. Analysis with an engine shows that 28.Rf5! would have satisfied the demands of the position and left White with the better game.

Here also 28.Rfe2 would have been adequate against 28...Rxh2? (but Black has the better choice of 28...e6) 29.Bg2+-) 28...Rxh2 29.Rxg5 Nf6 30.Bg2+-.

27...Rxh2 28.Re6+

Although I was desperately trying to complicate a lost game, the engine says the position is equal.

28...Kd5

White to move

29.c4+??

A game losing blunder. Michael can take either pawn with a winning position. Michael expected 29.Rxe7 and his assessment that it was a better choice for me is correct. 29...Kxd4 30.Rxb7 Nd5 31.c3+ with equality.

29...Kxc4 30.Rxe7 Nd5?

A lucky break from my point of view.
30...Rh1+ 31.Kf2 R8h2+ 32.Ke1 Rxf1+ 33.Kxf1 Rxb2-+
30...Rxb2-/+

White to move

31.Rc1+ Kb3

31...Kxd4 walks into a little combination with a discovery and interference that picks up a rook. 32.Re4+ Kd3 33.Rh4+ Ke2 34.Rxh2++- 

32.Rxb7+ Ka2?

The rest is easy, except that my focus on winning the rook blinded me to checkmate.

32...Nb4 was the only defense that keeps the game very much alive for Black with difficult play for both sides.

White to move
Analysis after 32...Nb4

33.Rxc6 a5 34.Rc5 Rd2 35.Re7! would have been hard for me to find (35.Rd7 Rhh2=) 35...Rxd4 (35...Ka2! These engine lines are not clear to me at all.) 36.Rxa5.

Back to the position that did occur.

White to move

33.Bb1+ Ka1 34.Bh7+ 

I missed 34.Bd3+! Ka2 35.Bc4#, but the interference with the bishop was sufficient to provoke Michael's resignation.

1-0

Michael understood the game much better than I, but his errors came later and determined the final result. This game gave me first place in the event.

21 May 2023

Bishop vs. Knight

A couple of days ago, I started reading Bishop v Knight: the Verdict (1999) by Steve Meyer. Then, I started studying Rosenthal -- Steinitz 1873, the first game in the book. Before the first round of the Inland Empire Open yesterday, I was analyzing this game with some other participants.

The imbalance appeared in my second round game. My opponent was Steve Brendemihl, who is returning to chess after many years away. We last played in 2006 in the Washington Challenger's Cup. I won that game and then we tied for first in the u1700 section.

Yesterday, I had Black. It was a long, complicated game which we both enjoyed.

Brendemihl,Steve (1578) -- Stripes,James (1821) [C03]
Inland Empire Open Spokane (2), 20.05.2023

White's 29th move won a pawn and set up a forcing sequence that led to the endgame imbalance.

Black to move

30...Rd7!?

Perhaps not objectively best, but it disrupts White's plan. Steve identified this move as the decisive moment in the game.

Steve expected 30...Rxa4 31.Rxa4 Rxd5 32.Ne7+ Kf7 33.Nxd5 Bxa4, which struck me as difficult to win. Of course, the game is objectively equal in either case.

31.Rxd7 Bxd7 32.Ne7+ Kf7

White to move

White is ahead a pawn, but Black's pieces are more active. The rook and bishop coordinate well to create threats. Black can win back the pawn easily if that seems best.

33.Nd5 Bc6 34.Ne3 Rf4

I am hoping to win the h-pawn.

35.Nf5 h5

White to move

36.Ne3??

One player's tragedy is another's victory.

36.Nd4 forces a rook ending with an equal number of pawns. 36...hxg4 37.Nxc6 bxc6 38.hxg4 Rxg4+=

With best play, the rook ending should be drawn.

36...Rf3

Threatening the rook on a1

37.gxh5 Rxh3 38.Ng2 Rxh5 39.f3 Bxf3 40.Kf2 Bxg2 41.Kxg2 Rd5 42.b4 Rd2+ 0-1

14 May 2023

Short Side

After playing a rook and pawn ending for 43 moves and keeping things level, my opponent erred.

Black to move
The king must go to the short side; that is Kg8. The rook can shift to the long side at the right moment to enable checking White's king from a distance. With such play, Black holds a draw.

63... Ke8?? 64. f5 Ra1 65. Rb8+ Kd7 66. Kf7 Rf1 67. f6 Rf2

White to move

68. Rb7+

68. Kg7 is a faster win Rg2+ 69. Kf8 Rf2 70. f7 Rg2 71. Rb4

68... Kd8 69. Rb4 Rd2

Black understands that White would like to drive the Black king another file from the pawn. But White has other means available. Means that I failed to employ.

70. Kg7

70. Kf8 is faster.

70... Rg2+ 71. Kf8 Rd2 72. f7 Rd1

White to move

73. Re4

Better would have been 73. Rf4 or 73. Rg4.

73... Rd2 74. Re8+

74. Kg7 Rg2+ 75. Kf6 Rf2+ 76. Ke6 Rf3 77. Re5

74... Kd7 75. Re7+

75. Kg7 Rg2+ 76. Kh6

75... Kd8 76. Re6 Rg2 77. Rd6+ Kc7

White to move

78. Rd4

My other small inaccuracies added a move or two each to eventual checkmate. Here when I played the second best move, eight moves were added to to road towards checkmate.

78. Ke7! Rf2 79. Re6 Rf1 80. f8=Q Rxf8 81. Kxf8

78... Re2 79. Kg7 Rg2+ 80. Kf6 Rf2+ 81. Ke6 Re2+ 82. Kf5 Rf2+ 83. Rf4 {Black resigned} 1-0

Remember always: king on the short side, rook on the long side.