Author: Sune Larsson
Date: 13:39:45 11/29/01
[D]8/5p2/6p1/ppk1b3/4K1Pp/1P3P1P/P3N3/8 b - - 0 1
Lesiege 2530 - Andersson 2630, Elista 1998
An ending bishop vs knight. Pawns on both wings and black wins it.
First mission: Keep the white king tied up. Key square for the black
king is c4.
Test: Black to move and wins.
[Event "Elista"]
[Site "?"]
[Date "1998.??.??"]
[Round "?"]
[White "Lesiege, Alexandre"]
[Black "Andersson, Ulf"]
[Result "0-1"]
[WhiteElo "2530"]
[BlackElo "2630"]
[Annotator "Larsson"]
[SetUp "1"]
[FEN "8/5p2/6p1/ppk1b3/4K1Pp/1P3P1P/P3N3/8 b - - 0 1"]
[PlyCount "29"]
[EventDate "1998.10.15"]
{Black's advantage consists of having bishop vs knight. It's important that
there are pawns on both wings. The first step is to make a standstill for
white's king.} 1... Bg7 2. Kd3 Kb4 3. Kc2 Ka3 4. Kb1 {
The white king is now passive. The key square for black is c4.} 4... a4 $1 5.
bxa4 bxa4 6. Nf4 Kb4 7. Kc2 Kc4 8. Ne2 Be5 $1 {
The problem for white is that he cannot create active counterplay.} 9. Kd2 Bc7
10. Kc2 Ba5 {Controls the important square d2. White is short of moves.} 11. f4
{White is lost. After 11.Nc1, black can enter the position with 11.-Kd4
followed by 12.-Ke3. Equally bad is 11.Kd1 Kd3. Black's king now gets the
square e4.} 11... Bb4 12. Ng1 Kd4 13. Nf3+ Ke4 14. Ng5+ Kxf4 15. Nxf7 Kg3 {
After 16.Ng5 black wins with 16.-Be7. No hope for 16.Ne5 g5 17.Nf7 Be7.} 0-1
Sune
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