I don’t know if you saw it or not, Alena, but your solution to the fourth puzzle from a few days back- the Liburkin 1931- was incorrect. In any case, I will post the next four in this thread in a hour or two.
The solution to the third puzzle is correct, but you really should have put in the main line at moves 4 and 5- after 4. …..Kd5, it is easy to see that 5.Bxe7 wins, but the beautiful part of this somewhat flawed puzzle is that 5.Bxe7 also wins if black has played the more obvious 4. ….Kd6 double protecting the backward pawn.
I wrote that the puzzle is flawed because it has an unfortunate cook in it- white can also win with an immediate 1.Bf8.
Here is the solution for the fourth puzzle.
1. Rb4 Rxd7
2. b7 Rxb7
3. Rxb7
In my opinion it’s a win but I have difficulties in winning this position. It requires skilful rook manoeuvres.
I personally think the position is a draw. Here is the link to the previous time it was posted: Link.
There were two plausible beginnings, but I thought 5 years ago, and I still think today that they end up in the same place in the end- a draw I could cofirm in many lines with the Nalimov Tablebase. Now, there are intermediate 7 man positions in a lot of these lines before it reduces to 6 men, and could now be analyzed by the Lomonosov Tablebases, but I still haven’t found a free version of this database.
1. Re8+ Bf8
2. Qg6+ Rg7
3. Rxf8+ Kxf8
4. Qe8#
I don’t know if you saw it or not, Alena, but your solution to the fourth puzzle from a few days back- the Liburkin 1931- was incorrect. In any case, I will post the next four in this thread in a hour or two.
Puzzles for Alena, or any who wish to try them:
7K/8/b7/8/6B1/2p5/q4Pk1/4Q3 w Kubbel 1925 White to move and win.
k6r/p2RN3/P7/1R6/2p1pP2/1p2Pb2/2r5/1K6 w White to move and win (a fairly easy one, I think)
8/2b1p1B1/5p2/5PpK/8/k5P1/8/8 w White to move and win, Evreinov 1971
8/3P4/1P2p3/K1k1P3/P5R1/7P/4r3/3r4 w Win, lose, draw for white?
Here is the solution for the first puzzle. I saw an idea instantly.
1. Bh3+ Kxh3
2. Qg1 Kh4
3. Qh2+ Kg5
4. f4+ Kg4
5. Qxa2 Bd3
6. Qf2
Here is the solution for the second puzzle.
1. Rh5 Rc1+
2. Kxc1 b2+
3. Kb1 Rg8
4. Nxg8 Kb8
5. Rh8 Bh5
6. Nf6+ Be8
7. Rxe8#
Here is the solution for the third puzzle.
1. g4 Kb4
2. Bf8 Bd8
3. Kg6 Kc5
4. Kf7 Kd5
5. Bxe7 Ba5
6. Bxf6 Ke4
7. Kg6 Kf3
8. Kh5 Ke4
9. Kxg5 Bd2+
10. Kg6 Bc1
11. Be7 Ke5
12. f6 Ke6
13. Bf8 Kd5
14. f7 Be3
15. Bh6 Bc5
16. f8=Q Bxf8
17. Bxf8 Ke6
18. g5 Ke5
Alena,
The solution to the third puzzle is correct, but you really should have put in the main line at moves 4 and 5- after 4. …..Kd5, it is easy to see that 5.Bxe7 wins, but the beautiful part of this somewhat flawed puzzle is that 5.Bxe7 also wins if black has played the more obvious 4. ….Kd6 double protecting the backward pawn.
I wrote that the puzzle is flawed because it has an unfortunate cook in it- white can also win with an immediate 1.Bf8.
Here is the solution for the fourth puzzle.
1. Rb4 Rxd7
2. b7 Rxb7
3. Rxb7
In my opinion it’s a win but I have difficulties in winning this position. It requires skilful rook manoeuvres.
I personally think the position is a draw. Here is the link to the previous time it was posted: Link.
There were two plausible beginnings, but I thought 5 years ago, and I still think today that they end up in the same place in the end- a draw I could cofirm in many lines with the Nalimov Tablebase. Now, there are intermediate 7 man positions in a lot of these lines before it reduces to 6 men, and could now be analyzed by the Lomonosov Tablebases, but I still haven’t found a free version of this database.