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Problem Display

PID: 157520 (4Q3/3pKp2/2PNpN2/3P1PRP/3P1k1r/5PRB/pbP2B2/q2br3 w - - 0 1)

Fomichev, Evgeny Vasilevich

Sigurov, Aleksandr Ilich

3rd Prize, Zadachi i Etyudi, 2011

4Q3/3pKp2/2PNpN2/3P1PRP/3P1k1r/5PRB/pbP2B2/q2br3

#4

15 + 10

56	The Problemist	2015

SOLUTION

SOUND
Keys
- 1.Bg2!
  - threat
    - 2.R3g4+
      - 2...Rxg4
        3.Rxg4#
    - 2.R5g4+
      - 2...Rxg4
        3.Rxg4#
  - 1...exd5+
    - 2.Kxd7
      - threat
        3.Sxd5#
      - 2...Re7+
        3.Qxe7
        threat
        4.Sxd5#
        4.Be3#
        4.Qe3#
        4.Qe5#
      - 2...Bxf3
        3.Sde4
        threat
        4.Sxd5#
        4.Rxf3#
        4.Qe5#
        4.Qb8#
  - 1...exf5+
    - 2.Kxd7
      - threat
        3.Rxf5#
      - 2...Re7+
        3.Qxe7
        threat
        4.Be3#
        4.Rxf5#
        4.Qe3#
        4.Qe5#
      - 2...Bxc2
        3.Sfe4
        threat
        4.Rxf5#
        4.Qe5#
    - 2.Kxf7
      - threat
        3.Rxf5#
      - 2...Re7+
        3.Qxe7
        threat
        4.Be3#
        4.Rxf5#
        4.Qe3#
        4.Qe5#
      - 2...Bxc2
        3.Sfe4
        threat
        4.Rxf5#
        4.Qe5#
  - 1...Bxd4
    - 2.R3g4+
      - 2...Rxg4
        3.Rxg4+
        3...Ke5
        4.Bg3#
        4.f4#
    - 2.R5g4+
      - 2...Rxg4
        3.Rxg4+
        3...Ke5
        4.Bg3#
        4.f4#

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