Fortress 1

W. Rudolph
The Chess Amateur
1912

Draw

1. Ba4+! 1. c4+? Kxc4 2. Bd3+ Kd5 3. Be4+ Ke6 4. Bf5+ Kf7 -+ 1... Kxa4 1... Kc4 2. Bb3+ Kb5 3. Ba4+ perpetual check 2. b3+ Kb5 3. c4+ Kc6 4. d5+ Kd7 5. e6+ Kxd8 6. f5! = Black cannot win despite its huge material advantage!

fortress

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