MESON Chess Problem Database

Problem Display
PID: 38163 (8/3pp3/4PP2/4k3/1P6/3R1Q2/1Kp1N3/2B5 w - - 0 1)

Heinonen, Unto

1st Prize, Avotakka, 1968

8/3pp3/4PP2/4k3/1P6/3R1Q2/1Kp1N3/2B5

#2

8 + 4

3751 FIDE Album (1968-1970) 1977

SOLUTION

  • SOUND
  • Sets
    • 1...dxe6
      • 2.Qf4#
    • 1...d6
      • 2.Re3#
    • 1...exf6
      • 2.Qd5#
  • Tries
    • 1.Rxd7?
      • 1...exf6
        • 2.Qd5#
      • 1...Kxe6!
    • 1.exd7?
      • 1...exf6
        • 2.Qd5#
      • 1...e6
        • 2.Qf4#
      • 1...Ke6!
    • 1.fxe7?
      • 1...Kxe6
        • 2.e8Q#
        • 2.e8R#
      • 1...dxe6
        • 2.Qf4#
      • 1...d6
        • 2.Re3#
      • 1...d5!
  • Keys
    • 1.Sd4!
      • 1...Kd6
        • 2.Bf4#
      • 1...dxe6
        • 2.Sc6#
      • 1...exf6
        • 2.Bf4#
      • 1...d5
        • 2.Qf4#
      • 1...d6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK,XP(G)::QAB1(E)
    • P(c);SBLOCK::R(D)
    • P(d);SBLOCK,XP(H)::QAR1(E)
  • Tries
    • Try
      • R(D);XP(c)
      • Vars
        • P(d);SBLOCK,XP(H)::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT,XP(G)
    • Try
      • P(G);XP(c)
      • Vars
        • P(d);SBLOCK,XP(H)::QAR1(E)
        • P(d);SBLOCK::QAB1(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(H);XP(d)
      • Vars
        • K(b);P-FLIGHT,XP(G)::P=Q
        • P(c);SBLOCK,XP(G)::QAB1(E)
        • P(c);SBLOCK::R(D)
      • Refutation
        • P(c);
  • Actual
    • S(C);
    • Vars
      • K(b);S_FLIGHT::B(A)
      • P(c);N_GUARD,SBLOCK,XP(G)::S(C)
      • P(d);SBLOCK,XP(H)::B(A)
      • P(c);SBLOCK::QAB1(E)
      • P(c);SBLOCK::QAR1(E)
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