R vs N+pp

[Event "White to play and draw"] [Site "?"] [Date "2004.??.??"] [Round "?"] [White "Villeneuve, A."] [Black "0103.02"] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/8/8/6n1/6k1/6pp/R7/6K1 w - - 0 1"] [PlyCount "15"] [EventDate "2004.??.??"] [SourceDate "2000.07.25"] 1. Rb2 $1 {Averbach thought it was necessary to act, whereas one can simply... wait !} (1. Ra4+ $1 Kf5 2. Ra5+ Kf4 3. Ra4+ Ne4 4. Rb4 Kf3 (4... Ke5 5. Rb5+ Kd4 6. Rh5) 5. Rb3+ Ke2 6. Rxg3 $1 Nxg3 7. Kh2 $11 {Averbach, 1962}) 1... Nf3+ 2. Kh1 $3 {[#]} (2. Kf1 $2 Ne1 $3 {[#]} (2... Nh4 $2 {(threatens ...g2+ or ...h2)} 3. Rb4+ $8 (3. Kg1 $2 g2 $8 4. Kf2 h2) 3... Kg5 4. Rb3 $3 {[#]} (4. Rb5+ $2 Kf6 $8 5. Rb6+ Ke7 6. Rb7+ Kd6 7. Rb1 h2 $19) 4... g2+ (4... h2 5. Rxg3+ $8 Kf4 6. Rh3) 5. Kg1 $8 Kg4 6. Rg3+ $3 {[#]}) 3. Rb4+ (3. Rb1 g2+ $1 4. Kg1 Kg3 $1) 3... Kf5 $1 4. Rb5+ (4. Rb3 h2 $1) 4... Ke4 $1 5. Rb4+ (5. Kxe1 h2 $8 6. Rh5 g2 $1) 5... Kd5 $1 6. Rb5+ (6. Rg4 h2 $8 {: it's why wK must be on h1}) 6... Kc4 $1 7. Rh5 h2 $1 $19) 2... Ne1 3. Rb4+ $8 {Now it's time for action.} (3. Rb1 $2 g2+ $8 4. Kg1 (4. Kh2 Nf3#) 4... Kg3 $1 $19) (3. Kg1 $2 g2 $8 $19) 3... Kf3 (3... Kf5 4. Rb5+ $1 Kf4 5. Rb4+ $1 (5. Rb1 $1 g2+ 6. Kh2 $8) 5... Ke3 6. Rg4 $3 {[#]} (6. Rb3+ $2 Kf2 $8 7. Rb2+ Kf1 $8) 6... Kf2 7. Rg7 $1 Nf3 8. Rxg3 $3 $11 {[#]}) 4. Rb7 $1 {Or on b6, b8.} (4. Rb3+ $2 Kf2 $8 {already seen}) (4. Kg1 $1 Nd3 (4... h2+ 5. Kh1 $8) 5. Rh4 $1 (5. Rb3 $1)) 4... Kf2 (4... Nd3 5. Rf7+ $1 (5. Rh7 $1) 5... Nf4 6. Rf8 $1) 5. Rg7 $3 {[#]} Nd3 (5... Nf3 6. Rxg3 $8 {already seen}) (5... g2+ 6. Kh2 $8) 6. Rg6 $1 (6. Rg4 $1 Kf3 7. Rh4 $8) (6. Rg8 $1 Ne5 7. Rg7 $8 (7. Rg5 $2 g2+ $8 8. Kh2 Nf3+ $8) 7... Kf3 8. Kg1 $1) (6. Rf7+ $1 Ke2 7. Kg1 $3 {[#]} (7. Re7+ $2 Kf1 $8) (7. Rf8 $2 Nf2+ $8) 7... h2+ 8. Kg2 $8 Nf2 9. Re7+ $8) 6... Ne5 (6... Kf3 7. Rf6+ $1) 7. Rg8 $1 g2+ 8. Kh2 1/2-1/2

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