White to move. How should White proceed?
Dolgov 1995, presented by Andreas
2B1K3/1R6/k7/8/8/2B2p2/6n1/2q4r w – – 0 1
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1. Rb3 Ka7
2. Bd4 Kb8
3. Bg2 Kg1
4. Bc6 Kf1
5. Bg2 Kg1
6. Bb7 Kf1
7. Bg2 Kg1
8. Ba8 Kf1
9. Rf6 and white wins.
1. Rb3+ Ka7
2. Bd4+ Ka8
3. Bb7+ Kb8
4. Bf3+
* …Kc7?
5. Be5+ Kc8
6. Bb8#
or
* …Kc8?
5. Bb7+
** …Kc7
6. Be5#
** or …Kb8
starts the loop over, ending with a dead knight and a dead rook.
6. Bxg2+ Kc8
7. Bb7+ Kb8
8. Bxh1+ Kc8
9. Rc3+ Qxc3
10 Bxc3
and white gets to go after the black king with two bishops.
Saturday morning chess tactic
Anonymous, “3. Kg1” is an invalid move, and I can’t make out your intentions after this…
Nick…
After
8.Bxh1 Kc8
9.Bb7+ Kb8
10.Be4 Kc8
11.Rb5! wins on the spot.
No need to go to the 2B endgame.
Nice find – I knew it was there somewhere, but was content to extend the game 30 more moves or so. 😉
Agreed, I appended few more variations to follow up on the 11.Rb5 idea. Yes, they lead to an easier R+B endgame which is faster.
felt much quicker was after Bxh1+ Kc8 Be5! with idea mate on b8.
1. Rb3+ Ka7 2. Bd4+ Ka8 3. Bb7+ Kb8 4. Bxf3+ Kc8 (4… Kc7 5. Be5+ Kc8 6. Bb7#)
5. Bb7+ Kb8 6. Bxg2+ Kc8 7. Bb7+ Kb8 8. Bxh1+ Kc8 9. Bb7+ Kb8 10. Bf3+ Kc8 11.
Rb5 Qd2 (11… Qe1+ 12. Be5 Qxe5+ 13. Rxe5 Kc7 14. Ke7 Kb6 15. Kd6 Ka7 16. Kc7
Ka6 17. Bb7+ Ka7 18. Ra5#) 12. Bb7+ Kc7 (12… Kb8 13. Bd5+ Kc8 14. Be5 Qb2
(14… Qxd5 15. Rb8#)(14… Qa5 15. Be6#)15. Be6#) 13. Be5+ Qd6 14. Rc5+ Kxb7
15. Bxd6 Ka7 16. Kd7 Kb7 17. Bc7 Ka8 18. Kc6 Ka7 19. Ra5#