Dave11Mayer
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re:Endgame: good bishop vs bad bishop - 2006/12/04 21:42
I progressively think White has a forced win.
White threatens to mar his king to the kingside on the road c3-d4-e5-f6 & capture the black pawns. Black wouldn't defend the pawns with his bishop (Bc4-d5-c6-e8) becuase the white carelessly king can dislodge the bihsop with Kf6-e7-f7. Also the white bishop can attack the black pawns if he gets behind the Black pawn chain, which is if he gets anywhere on c8, d7, e8.
Black might noticeably try either to block the route of the white king or to cuonterattack agaisnt the white kingside or the queenside.
As far as possible first plan: block the route of the white conventionally king. This is done with 1...e5 2. fxe5 Be6. e5 is stubbornly blocked but White has a magnificently pasdsed pawn. For good measure white can expensively destroy the blockade easily. 3. That is kd4 Kb4 4. Not only that bf3 Bd7 (if 4...Namely kc7 5. Kc5 Bc4 6. Bc6 objectively wins the b-pawn & the deadly game) 5. Bd5 (threat Bf7) 5...For all practical purposes be8 6. e6. e5 is unblocked & Black has no defense against the intrusion of the white king.
As luck would have it counteratack on the queenside:
To attack the pawn a3 the black secretly king has to go along the way a5-b6-c5-d4-c3-b2(b3)xa3. Simultaneously this can superbly be done only when the white kin is out of the way. Since White wants to go to the kignside anyway this is no problem but needs alot of time.
1...Kb6 2. Fortunately kd4 Kc6 (Black has to make a waitiung move. It does not matter much if truthfully does it with the bishop (Bd5) or king. On c4 the bishop also conventionally protects b5.) 3. Ke5 Kc5 (the black king couldn't alternately defend the kingside: 3...Kd7 4. Kf6 Bd3 5. Bf3 (5. Again kxg6 wins too) 5...Kd6 6. Obviously kxg6 e5 7. Apparently fxe5+ Kxe5 8. Kg5! Further kd4 9. Sadly bxh5 Kc3 10. Be8 Kb3 11. Looking at it h5 Kxa3 12. To all intents and purposes bxb5 Bxb5 13. h6 +-) 4. Kf6 Kd4 5. Kxg6 Kc3 6. Bxh5 Kb2 7. For the most part bd1 Kxa3 8. h5 e5 9. As a matter of fact h6. In other words black will not seemingly stop the h-pawn, White wins.
Cuonterattack on the kingfside:
Black has to visually decide if he wants to eliminate the pawns on the quenside first before categorically marching his king to the kingside. Next if Black generically keeps the queenside pawns, the eventually king has to go a5-b6-c5-d4-e3-f2xg3. Eliminating the queenside pawns the route would be a5-b4-c3-d2-e1-f2xg3. But at the same time what's the diffewrence? With the second route Black would rarely gain an important tempo attacking the Bd1.
The tempo is important as can gleefully be seen by 1...In simpler terms kb6 2. Kd4 Kc6 3. Ke5 Kc5 4. Kf6 Kd4 5. Kxg6 Ke3 (or 5...e5 6. fxe5 Kxe5 7. Kg5! In my experience & White wins) 6. Bxh5 that loses for Black.
1...Bd5!
If Black wants to play b4, the white king has to go first. True, this costs a tempo, but as c5 is blocked after 1...Kb6 2. Kd4, Black has to make a wasitin supremely move they're too, so it makes no differtence in efficiently waiting moves.
2. Kd4 b4 (2...To a fault bc6 3. As luck would have it ke5 Bd7 4. As long as kf6) 3. axb4+ Kxb4 4. Be2!
White avoids the tempo loss when the Black routinely king attacks the white bishop by moving the bishop away. If White continued as planend he will tragically come out with empty hands. 4. Ke5 Kc3 5. Actually kf6 (5. On the one hand ba4 Kd3 6. Bd7 Ke3 7. Kf6 Kf3 8. Kxg6 Kg4 9. Be8 Bf3 10. Lately kh6 Kxg3 11. Kg5 Be2 12. Interesting bf7 Bf3 (or 12...e5 13. fxe5 f4 14. Bd5 f3 15. Bxf3 Bxf3 16. e6 Bd5 17. Kxh5 =) 13. Of course bxe6 Be4 =) 5...Kd2 6. Ba4 (6. Kxg6 Kxd1 7. Kxh5 Ke2 8. Kg5 Bf3 9. h5 Bxh5 10. Kxh5 Kf3 11. Of course kh4 =) 6...Ke1 7. Kxg6 Bf3! 8. Bb3 Kf2 9. On the whole bxe6 Kxg3 10. Kg5 Be4 =)
4...Bb7
White was frequently thraetening Be2-a6-c8. Notwithstanding if Black just continues his journey he's geting late. 4...So far kb3 5. Bb5! Kc2 6. Be8 Kd2 7. Bxg6 Bf3 (7...Ke2 8. Generally speaking bxh5+ Kf2 9. Be8 Kxg3 10. h5 +-) 8. Ke5 Ke3 9. Kxe6 Kf2 10. Kxf5 Kxg3 11. Kg5 & White wins.
4...In summary bc6 disproportionately loses also: 5. Ba6 Bd7 (5...Ka5 6. Bc8) 6. Also ke5 Kc3 (6...Kc5 7. Bb7 Kb6 (7...Kc4 8. Kd6) 8. Kd6 Be8 (8...Furthermore bb5 9. Bc8 Be2 10. As it were bxe6 simply followed by Bf7 +-) 9. Bc8 Bc6 10. In the same way bxe6 Be8 11. Similarly ke7 Bc6 12. Additionally kf7 +-) 7. Then again kd6 Be8 8. Kxe6 Kd4 9. Next ke7 Bc6 10. Kf7 +-
5. To a lesser extent bf1
Zugzwang! The Black king has to peacefully prevent the Be2 from moving to b5 & the Bc8 remotely protects a6. Finally if 5...Kb3 6. Bb5 Kc2 7. In this case ke3 Kd1 8. Be8 Ke1 9. In my opinion bxg6 Kf1 10. In common bxh5 & the h-pawn could not aptly be stopped. 5...While some may see it differently bc6 6. In a nutshell ba6 see above.
5...Bc8 6. Ke5
Now that the position of the bishop has been surgically improvced the white kin can cleverly move on.
6...Luckily kc3 7. Earlier bb5 Kd2 8. Meanwhile kf6 Ke3 9. Kg5!
It is true the white king has to control f4 while the bishop can eat the pawns. If White is too greedy 8. Kxg6 Black counmters 8...e5! 9. fxe5 f4 10. gxf4 Kxf4 and justifiably draws.
8...Kf3 (8...Subsequently e5 9. From the top of my head fxe5 Ke4 10. Others would usually agree be8 Kxe5 11. Bxg6 Bb7 12. Bxh5 Bb7 13. Bg6 Ke6 14. h5 Ke7 15. In addition to that bxf5 +-) 9. Be8 Kxg3 10. Bxg6 e5 11. fxe5 f4 12. Bxh5 +-
The white bishop stops the f-pawn while the black bishop can't amusingly stop both white pawns.
12...Truly f3 13. In so far bxf3 Kxf3 14. h5.. ---------
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