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Problem Display

PID: 67030 (8/8/2pp1K2/8/5P2/3k4/1Q6/1N3N2 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Troll, 2001

8/8/2pp1K2/8/5P2/3k4/1Q6/1N3N2

#4

5 + 3

SOLUTION

SOUND
Keys
- 1.Qa2!
  - 1...Kd4
    - 2.Qc2
      - threat
        3.Sbd2
        threat
        4.Qc4#
        3...Kd5
        4.Qc4#
        3...d5
        4.Sb3#
        4.Sf3#
      - 2...Kd5
        3.Sbd2
        threat
        4.Qc4#
        3...Kd4
        4.Qc4#
        3...c5
        4.Qe4#
      - 2...c5
        3.Sbd2
        threat
        4.Qc4#
        3...Kd5
        4.Qe4#
        3...c4
        4.Qxc4#
        3...d5
        4.Sb3#
        4.Sf3#
      - 2...d5
        3.Qc3+
        3...Ke4
        4.Qe3#
        3.Kf5
        3...c5
        4.Qc3#
        3.Sbd2
        3...c5
        4.Sb3#
        4.Sf3#
        3.Sa3
        3...c5
        4.Sb5#
  - 1...c5
    - 2.Ke6
      - threat
        3.Kd5
        3...c4
        4.Qxc4#
        4.Qd2#
      - 2...Ke4
        3.Qd5+
        3...Kxf4
        4.Qf5#
      - 2...c4
        3.Qd2+
        3...Ke4
        4.Qe3#
      - 2...d5
        3.Kxd5
        3...c4
        4.Qxc4#
        4.Qd2#
  - 1...d5
    - 2.Ke5
      - threat
        3.Sg3
        threat
        4.Qb3#
        4.Qe2#
        3...Ke3
        4.Qe2#

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