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The only question is whether to take at e7 first, or play Rd7. After 1.Be7, black retakes and when white tries Rd7, Kf6 looks like it will hold for black. So, Rd7 first it is:
1. Rd7 Rd7
The only other alternatives were h6 attacking white’s bishop and Rab8 protecting the b7 rook. If black tries h6, white just captures at e7 with the bishop and wins. On Rab8, white replies with Be7 anyway and I don’t see how black avoids losing another rook to boot to stop the pawn. Continuing:
2. ed7 Rd8 (Kf7 3.Be7 Ke7 4.Rc8+-)
3. Be7 Rd7
4. Bg5 and white is up a bishop for a pawn.
1Rd7 Rxd7
2exd7 Kf7
2…. Rd8
3Bxe7 Rxd7 white is a piece up.
3Bxe7 Kxe7
4Rc8 wins.
Very nice. White’s control of the board and the passed pawn combine to strike a decisive blow. White wins by 1. Rd7! This is the threat:
1. Rd7! Rxd7
2. exd7 Kf7
3. Bxe7 Kxe7
4. Rc8! Rxc8
5. dxc8Q
Black has no worthwhile alternative. Giving up the knight at move 2 is abject surrender:
1… Rbb8
2. Rxe7+ Kg8
3. Rcc7! leading to mate.
The best course for black is to give up the knight at move 3.
2… Rd8
3. Bxe7 Rxd7
1.3d7
Another piece of cake, this time yellow-cake with chocolate frosting.
1.Rd7 {Double attack: a pin on the already attacked knight on e7, and an attack on its defender, the rook on b7. Black’s reply is forced.}
1. … Rxd7
2. exd7 {The Black knight, which prevents White’s Rc8, is attacked by the White bishop. Any move by the knight now loses immediately to Rc8. There is no defence.}
2. … Kf7
{Black does better to play 2. .. Rd8 3. Bxe7 Rxd7 4. Bg5
But is still losing anyway.}
3. Bxe7 Kxe7
4. Rc8 {and White is going to queen the pawn.}
rd7 wins
Rd7 attacks both the rook and the knight. this might follow:
1. Rd7 Rxd7
2. exd7 any
3. Rc8
either winning the rook or queening.
greets, jan
It seems that White will stay a piece up in every variation
1. Rd7 .. Rxd7 (N and R were under attack)
2. exd7 .. Kf7 (otherwise Bxe7)
3. Rc8 .. Rxc8 (..Nxc8 4.d8=Q)
4. Bxe7 .. Rc1+ followed by Kxe7
Ops… ok, this is not how White should proceed…
At this point… i’d play OTB:
1. Bxe7 .. Rxe7
2. Rd7 aiming at eliminating the couple of black pawns a7-b6, which may not be sufficient…
1. Rd7
must win the knight for a pawn, I think.
Threats both Rxb7 and Bxe7.
1. … Rxd7
2. exd7 Rd8 (Kf7 Rc8 was worse!)
3. Bxe7 Rxd7
Up with bishop for pawn.
1. Rd7, RXd7 2. eXd7, Rd8 3. BXe7, RXd7 (White is up a piece and is in a strong position to win)
Actually i forgot that in my first line, after 2..Kf7 White can play Bxe7 followed by Rc8. So i went astray very easily…