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Problem Display

PID: 236293 (K2N2n1/8/2N2p2/2Pk2p1/2Rpr1Pp/B2B2pb/1R1p4/5r2 w - - 0 1)

Volkmann, Albert

Die Welt, 1951

K2N2n1/8/2N2p2/2Pk2p1/2Rpr1Pp/B2B2pb/1R1p4/5r2

#4

9 + 11

6490	yacpdb	2021

SOLUTION

SOUND
Keys
- 1.Ra4!
  - threat
    - 2.Bc4#
  - 1...Rxg4
    - 2.Rbb4
      - threat
        3.Rxd4+
        3...Rxd4
        4.Rxd4#
      - 2...Rff4
        3.Rb7
        threat
        4.Rd7#
      - 2...Re4
        3.Bc4+
        3...Kxc5
        4.Rb1#
        4.Rb2#
        4.Rb3#
        4.Rb5#
        4.Rb7#
        4.Rb8#
        3.Rxd4+
        3...Rxd4
        4.Rxd4#
      - 2...Rgf4
        3.Rxd4+
        3...Rxd4
        4.Rxd4#
  - 1...Rc1
    - 2.Rbb4
      - threat
        3.Rxd4+
        3...Rxd4
        4.Rxd4#
      - 2...Rxg4
        3.Rxd4+
        3...Rxd4
        4.Rxd4#
      - 2...Rc4
        3.Bxc4+
        3...Kxc5
        4.Rb1#
        4.Rb2#
        4.Rb3#
        4.Rb5#
        4.Rb7#
        4.Rb8#
      - 2...Rf4
        3.Rxd4+
        3...Rxd4
        4.Rxd4#
  - 1...Ref4
    - 2.Rbb4
      - threat
        3.Rxd4+
        3...Rxd4
        4.Rxd4#
      - 2...Rxg4
        3.Rxd4+
        3...Rxd4
        4.Rxd4#
      - 2...Re4
        3.Bc4+
        3...Kxc5
        4.Rb1#
        4.Rb2#
        4.Rb3#
        4.Rb5#
        4.Rb7#
        4.Rb8#
        3.Rxd4+
        3...Rxd4
        4.Rxd4#
        3.Rb7
        threat
        4.Bc4#
        4.Rd7#
        3...Re6
        4.Rxd4#
        3...Re7
        4.Rxd4#

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