Grigory Popov (Russia) – fen code:8/R3K3/2b1pN2/5k2/8/4B3/8/8

Grigory Popov (Russia)

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4+3

Main plane - Ra7- a1- g1-g5# does not pass at once because of protection - 1. Ra1? Ke5 2. Rg1 Be4 3. Rg5+ Bf5!.

Preliminary game it is necessary to deprive black with king of access to a field „e5‟, having caused its blocking blacka pawn.

But early at once 1. Ra5+?, as. except for 1. … e5?, is still and 1. … Bd5!

Therefore, in the beginning it is necessary to deprive black with the elephant of access to a field „d5‟, by its derivation

1. Ra1! (2. Rg1 ~ 3. Rg5#) Ke5 The best. At 1. ...Be4? probably and 2.Rg1 and 2.Rd1

2. Rg1 (2. Rg5#) Be4

3. Rg4 (4. R:e4+) Bd3! (The best. at 3. ... probably and 4.Ra4 and 4.Rc4 Bishop is compelled to leave from a vertical „a8-h1‟, losing access to a field „d5‟.

4. Ra4 (5. Ra5+) Kf5 – it is necessary to prepare for protection by a pawn

5. Ra5+ e5 and now passes the main plan -

6. Ra1 (Return) Bf1

7. R:f1+ Kg6

8. Rg1+ (Return) Kf5

9. Rg5#

The problem contains still 1,25 rundlauf white rook.

Except for the main plan, the problem has 2 preliminary plans interfering hit of the black Bishop and black King on fields „d5‟ and „e5‟ accordingly.