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Problem Display

PID: 178829 (8/1p1r4/1pp2R2/3bn1pp/PBpk4/3p1p1Q/1P1N1P2/3K4 w - - 0 1)

Shifrin, Semion

Sachmatija, 2013

8/1p1r4/1pp2R2/3bn1pp/PBpk4/3p1p1Q/1P1N1P2/3K4

#3

8 + 12

SOLUTION

SOUND
Sets
- 1...c3
  - 2.bxc3#
- 1...c5
  - 2.Bc3#
Tries
- 1.Sb3+?
  - 1...Ke4
    - 2.Qf5#
  - 1...cxb3!
- 1.Qxd7?
  - threat
    - 2.Bc3+
      - 2...Kc5
        3.Qd6#
        3.Qe7#
    - 2.Qd6
      - threat
        3.Bc3#
      - 2...c3
        3.Bxc3#
        3.bxc3#
  - 1...Sg4
    - 2.Sxf3+
      - 2...Ke4
        3.Qf5#
        3.Qh7#
    - 2.Bc3+
      - 2...Kc5
        3.Qd6#
        3.Qe7#
  - 1...Sg6
    - 2.Sxf3+
      - 2...Ke4
        3.Qf5#
    - 2.Bc3+
      - 2...Kc5
        3.Qd6#
    - 2.Qd6
      - threat
        3.Bc3#
      - 2...c3
        3.Bxc3#
        3.bxc3#
  - 1...Sf7
    - 2.Sxf3+
      - 2...Ke4
        3.Qf5#
  - 1...b5
    - 2.Qd6
      - threat
        3.Bc3#
        3.Bc5#
        3.Qc5#
    - 2.Qe7
      - threat
        3.Bc3#
        3.Bc5#
        3.Qc5#
  - 1...Sxd7!
Keys
- 1.Qf5!
  - threat
    - 2.Qxe5+
      - 2...Kxe5
        3.Bc3#
  - 1...Re7
    - 2.Rd6
      - threat
        3.Qe4#
      - 2...Sg4
        3.Sxf3#
      - 2...Sg6
        3.Sxf3#
      - 2...Sd7
        3.Sxf3#
      - 2...Sf7
        3.Sxf3#
  - 1...Sg4
    - 2.Bc3+
      - 2...Kc5
        3.Se4#
  - 1...Sg6
    - 2.Bc3+
      - 2...Kc5
        3.Se4#
  - 1...Sf7
    - 2.Bc3+
      - 2...Kc5
        3.Se4#

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