[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Same Colored Bishop Endgames"]
[Black "Same Colored Bishop Endgames"]
[Result "*"]
[SetUp "1"]
[FEN "3k4/1b6/1P1KB3/8/8/8/8/8 w - - 0 1"]
[PlyCount "10"]
[EventDate "1930.??.??"]
[SourceVersion "1"]
[SourceVersionDate "2003.10.29"]
[SourceQuality "1"]

{The following position of reciprocal zugzwang has some practical significance. White to move draws.} 1. Bf5 {[%mdl 4]} (1. Bd5 Kc8 {(or 1...Ba6) is useless.}) 1... Bf3 2. Be6 {(with the idea 3 Bd5+-)} Bb7 $1 3. Kc5 Bf3 (3... Ke7 $2 4. Bd5) 4. Bd5 Be2 {(with the idea Kc8)} 5. Bb7 Kd7 $11 *

[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Same Colored Bishop Endgames"]
[Black "Same Colored Bishop Endgames"]
[Result "*"]
[SetUp "1"]
[FEN "3k4/1b6/1P1KB3/8/8/8/8/8 b - - 0 1"]
[PlyCount "8"]
[EventDate "1930.??.??"]
[SourceVersion "1"]
[SourceVersionDate "2003.10.29"]
[SourceQuality "1"]

{But what is Black to do, if it is his move? Any bishop retreat along the h1-a8 diagonal is refuted by 2 Bd5; therefore, he must play} 1... Ba6 {[%mdl 4] By the way (here's a tragicomedy!), in this won position, Botvinnik accepted a draw against A. Model in the 1931 Leningrad Championship. The path to victory is uncomplicated:} 2. Kc6 $1 Bc8 3. Bc4 $22 Bg4 4. Kb7 $1 Bf3+ 5. Ka7 {(with the idea Ba6-b7+-)} *

[Event "?"]
[Site "?"]
[Date "1986.??.??"]
[Round "?"]
[White "Same Colored Bishop Endgames"]
[Black "Same Colored Bishop Endgames"]
[Result "1-0"]
[SetUp "1"]
[FEN "2B5/8/Pk6/6K1/6p1/6P1/4b3/8 w - - 0 1"]
[PlyCount "15"]
[EventDate "1930.??.??"]
[SourceVersion "1"]
[SourceVersionDate "2003.10.29"]
[SourceQuality "1"]

{A typical situation: White can take the g4-pawn only at the cost of his a6-pawn. The question is whether the enemy king can get back in time.} 1. Kf4 $1 {[%mdl 32769] Excellently played! White improves his own king's position (now it no longer stands in the path of its pawn) while simultaneously using zugzwang to force the enemy king further away from the kingside.} ({The hasty} 1. Bxg4 $2 Bxa6 2. Kf4 Kc7 3. Bf3 Kd6 4. g4 Ke7 $11 {leads only to a draw.}) 1... Ka7 $8 (1... Kc7 2. a7 Bf3 3. Bxg4) 2. Bxg4 Bxa6 3. Bf3 Kb6 ({No better is} 3... Bc8 4. Be4 Kb6 5. Bf5) 4. g4 Kc5 5. g5 Kd6 6. g6 Ke6 ({Nothing is altered by} 6... Ke7 7. Kg5 Kf8 8. Kh6 Bc4 9. g7+ Kg8 10. Be4 { h7+}) 7. Kg5 Bc4 8. g7 ({Black resigned, in view of} 8. g7 Kf7 9. Kh6 Kf6 10. Kh7 Kg5 11. Kh8 Kh6 12. Be4 {followed by Bh7-g8 (the h7-g8 diagonal, where the black bishop must move, is too short).}) 1-0

[Event "?"]
[Site "?"]
[Date "1930.??.??"]
[Round "?"]
[White "Same Colored Bishop Endgames"]
[Black "Same Colored Bishop Endgames"]
[Result "1-0"]
[SetUp "1"]
[FEN "1B6/8/7P/4p3/3b3k/8/8/2K5 w - - 0 1"]
[PlyCount "11"]
[EventDate "1930.??.??"]
[SourceVersion "1"]
[SourceVersionDate "2003.10.29"]
[SourceQuality "1"]

1. Ba7 $1 {[%mdl 32768]} (1. h7 $2 e4 $11) 1... Ba1 2. Kb1 Bc3 3. Kc2 Ba1 4. Bd4 $3 Bxd4 (4... exd4 5. Kd3 $18) 5. Kd3 Bb2 6. Ke4 $18 1-0

[Event "?"]
[Site "?"]
[Date "1989.??.??"]
[Round "?"]
[White "Same Colored Bishop Endgames"]
[Black "Same Colored Bishop Endgames"]
[Result "*"]
[SetUp "1"]
[FEN "8/8/2k2B2/8/8/p1P5/4K2b/8 b - - 0 1"]
[PlyCount "5"]
[EventDate "1930.??.??"]
[SourceVersion "1"]
[SourceVersionDate "2003.10.29"]
[SourceQuality "1"]

{We have already seen the tragicomedies that occurred in the games Botvinnik - Model and Capablanca - Janowsky. I will add one more example. The same tactical idea of interference as in the Heuäcker study brought Black success here. However, this occurred only as a result of his opponent's gross blunder.} 1... Be5 $4 {[%mdl 16384]} ({Black should have carried out his interference in a more primitive form, by preparing Be5. This could have been achieved either by} 1... Kd5 {(A.Mikhalchishin)} 2. Kd3 $5 Ke6 $1 $19 ({But not} 2... a2 $2 3. c4+) 3. Bd4 a2 4. c4 Be5 $19) ({Or by} 1... Kd6 2. c4 Be5 (2... a2) (2... Ke6) 3. c5+ Ke6 $1 $19 (3... Kd5 $2 {is a mistake, because of} 4. c6 $11)) 2. Bxe5 Kd5 3. Bg7 $4 ({After} 3. Kd3 $1 Kxe5 (3... a2 $2 4. Bg7 $18) 4. Kc2 $11 {the king is in the square of the a-pawn.}) 3... Kc4 $1 $19 {and Black won.} *

[Event "?"]
[Site "?"]
[Date "1847.??.??"]
[Round "?"]
[White "Same Colored Bishop Endgames"]
[Black "Same Colored Bishop Endgames"]
[Result "1-0"]
[SetUp "1"]
[FEN "2KB4/1P6/2k5/8/8/8/7b/8 w - - 0 1"]
[PlyCount "13"]
[EventDate "1930.??.??"]
[SourceVersion "1"]
[SourceVersionDate "2003.10.29"]
[SourceQuality "1"]

1. Bh4 {[%mdl 4096] The bishop wants to go to b8; if it manages to get there the fight will be over immediately. So Black tries to prevent it.} Kb5 $1 2. Bf2 Ka6 {If White now directs the bishop to c7 then the black king returns to c6 in time.} 3. Bc5 $1 { It is essential to control the d6-square.} ({After} 3. Be3 Bd6 $1 4. Bg5 Kb5 5. Bd8 Kc6 {there is no sense in} 6. Be7 Bh2 {because the white bishop cannot enter the g1-a7 diagonal immediately. But if the black bishop occupies some other position, White could have won the decisive tempo by means of deflection.}) 3... Be5 4. Be7 Kb5 5. Bd8 Kc6 6. Bf6 $1 Bh2 7. Bd4 {(with the idea Ba7-b8+-)} 1-0

[Event "?"]
[Site "?"]
[Date "1997.??.??"]
[Round "?"]
[White "Same Colored Bishop Endgames"]
[Black "Same Colored Bishop Endgames"]
[Result "1-0"]
[SetUp "1"]
[FEN "8/1B6/8/K5k1/1P6/8/8/3b4 b - - 0 45"]
[PlyCount "19"]
[EventDate "1930.??.??"]
[SourceVersion "1"]
[SourceVersionDate "2003.10.29"]
[SourceQuality "1"]

{White wins if he manages to advance the pawn to b6 and to penetrate to a7 with his king. As V. Zviagintsev has demonstrated, Black could have held the game.} 45... Be2 $1 {[%mdl 4096]} ({Black's initial move} 45... Kf6 $4 {allowed White to carry out this plan unhindered.} 46. b5 Ke7 47. b6 Be2 48. Bc6 $1 Kd6 (48... Kd8 49. Bb5 Bxb5 50. Kxb5 $18) 49. Bb5 Bf3 50. Ka6 Kc5 51. Bf1 (51. Bf1 {Black resigned. The king transfer to the rear of the white king} Kb4 52. Ka7 Ka5 {annot help here because the a6-c8 diagonal, where the bishop will be forced, is too short.})) 46. Ba6 Bf3 47. b5 ({If} 47. Bf1 {then} Bc6 $1 ({Rather than} 47... Kf6 $2 48. b5 Ke7 49. Ka6 $18) 48. Kb6 Be8 49. Kc7 Kf6 50. Kd6 Ba4 51. Bc4 Be8 52. Bd5 Bb5 53. Kc5 Be8 54. Bc6 Bh5 55. b5 Ke7 56. b6 Kd8 $11) 47... Kf6 48. b6 Ke7 49. Bf1 (49. Bc8 Kd8 50. Bf5 Bb7 $11 {or 50...Be2 gives nothing - the king cannot come to a7.}) 49... Bb7 50. Kb5 Kd8 (50... Kd6 {is also playable, but after} 51. Bh3 {he must retreat anyway:} Ke7 $8) 51. Bh3 Ke7 52. Kc5 Kd8 53. Kd6 Bf3 54. Be6 Bb7 $1 $11 {A position of reciprocal zugzwang has arisen, with White on move (see Illustrative Example 6-3).} 1-0

[Event "?"]
[Site "?"]
[Date "1977.??.??"]
[Round "?"]
[White "Same Colored Bishop Endgames"]
[Black "Same Colored Bishop Endgames"]
[Result "1-0"]
[SetUp "1"]
[FEN "1kb1B3/4K3/2Pp4/1p6/8/8/8/8 w - - 0 1"]
[PlyCount "23"]
[EventDate "1930.??.??"]
[SourceVersion "1"]
[SourceVersionDate "2003.10.29"]
[SourceQuality "1"]

{The initial moves are easy to find.} 1. Kd8 {[%mdl 6144]} Bb7 2. c7+ Ka7 3. Bc6 $1 Ba6 4. Bxb5 Bb7 {[%mdl 32768]} 5. Bc6 $3 {But here precise calculation is required to the end. Only then will the reason for this zwischenzug will be clear.} (5. Bd7 $2 Kb6 6. Bc8 Bg2 ({Or} 6... Bd5) 7. Ba6 Bh3 8. Bf1 Be6 $1 9. Bc4 d5 $1 10. Bxd5 Bh3 11. Bf7 Kc5 12. Be8 Kd6 $11) 5... Ba6 6. Bd7 Kb6 (6... d5 7. Bc8 Bf1 8. Bb7 Bh3 9. Bc6 d4 10. Bd7 $18) 7. Bc8 Bf1 8. Bb7 Bh3 {Now White should bring his bishop to d7 as soon as possible (before the black king comes to d6).} 9. Bg2 $1 Be6 (9... Bg4 10. Bf3 $1) (9... Bf5 10. Be4 $1) 10. Bd5 $1 Bh3 11. Bf7 Kc5 12. Be8 $18 { d7+- Black's d6-pawn caused his death, because it stood in the way of his own king. If White did not find the correct continuation on the fifth move Black could have gotten rid of the pawn.} 1-0