Canada-Ottawa Open 2012-10 19th-21st

The National Capital Open was held in 3 sections. Qn and Plotkin shared first place with 4/5 in the Open section.

2012 National Capital Open: Open Section
1 Zi Yi [joey] Qin  2453     4.0 Tied 1-2 for $300
3 Victor Plotkin     2335     4.0 Tied 1-2 for $300
(17 players)

2012 National Capital Open: U1900

5 Ryan Yang 1800              4.0 First $200
8 Herb Langer 1773            3.0 Tied 2-3rd $87.50
10 Steven Dale                    3.0 Tied 2-3rd $87.50
(13 players)

2012 National Capital Open: U1600
2 John If Lukezich 1432          5.0 First $125
4 Curtis Barlow Wilkes 1307  4.0 Second $75
(7 players)

Here is an interesting ending from the tournament

Plotkin Victor (CAN) (2335) - Sun Mike (1928) [B22]
2012 National Capital Open/U2200 Ottawa (Canada) (3), 20.10.2012

Position 1
White is trying to make progress in an equal postion. How should white try for the win?

White to play

Position 2

The action has heated up. White has just played 52.Kb3. White has an extra pawn but black has the more active king in this sharp position. How should black continue?