MESON Chess Problem Database

Problem Display
PID: 266204 (Q7/8/3p4/Rn1B1nR1/1r1k1N2/1P4Pb/3B2p1/6K1 w - - 0 1)

Haring, Jacobus

Schakend Nederland, 1978

Q7/8/3p4/Rn1B1nR1/1r1k1N2/1P4Pb/3B2p1/6K1

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qa7#
    • 1...Ke5
      • 2.Qh8#
  • Tries
    • 1.Bf3?
      • threat
        • 2.Qd5#
      • 1...Kc5
        • 2.Qa7#
      • 1...Ke5
        • 2.Qh8#
      • 1...Sc7
        • 2.Qe4#
      • 1...Se3
        • 2.Qe4#
        • 2.Qh8#
      • 1...Se7
        • 2.Qe4#
        • 2.Qh8#
      • 1...d5
        • 2.Qxd5#
      • 1...Sc3!
    • 1.Be4?
      • threat
        • 2.Qd5#
      • 1...Kc5
        • 2.Qa7#
      • 1...d5
        • 2.Qxd5#
      • 1...Sc3
        • 2.Se6#
      • 1...Sc7
        • 2.Se2#
      • 1...Se3
        • 2.Se2#
      • 1...Se7
        • 2.Se2#
      • 1...Ke5!
    • 1.Qa7+?
      • 1...Ke5
        • 2.Qg7#
      • 1...Sxa7!
  • Keys
    • 1.Bc4!
      • threat
        • 2.Qd5#
      • 1...Kc5
        • 2.Be3#
      • 1...Ke5
        • 2.Bc3#
      • 1...d5
        • 2.Qxd5#
      • 1...Sc3
        • 2.Se6#
      • 1...Sc7
        • 2.Se2#
      • 1...Se3
        • 2.Se2#
      • 1...Se7
        • 2.Se2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(d);N_GUARD,P_SPINS(e),S_FLIGHT::QAB(I)
    • K(d);N_GUARD,P_SPINS(f),S_FLIGHT::QAB(I)
  • Tries
    • Try
      • B(G);
      • Threat
        • QAR1(I)
      • Vars
        • K(d);N_GUARD,P_SPINS(e),S_FLIGHT::QAB(I)
        • K(d);N_GUARD,P_SPINS(e),S_CUTS(f),S_FLIGHT::QAB(I)
        • S(e);::QAR1(I)
        • P(g);::QAR1(I),XP(g)
      • Refutation
        • S(e);
    • Try
      • B(G);
      • Threat
        • QAR1(I)
      • Vars
        • K(d);N_GUARD,P_SPINS(e),S_FLIGHT::QAB(I)
        • P(g);::QAR1(I),XP(g)
        • S(e);::S(E)
        • S(f);::S(E)
      • Refutation
        • K(d);P_SPINS(e),S_FLIGHT
    • Try
      • Q(I);CHECK
      • Vars
        • K(d);N_GUARD,P_SPINS(f),S_FLIGHT::QAB(I)
      • Refutation
        • S(e);XQ(I)
  • Actual
    • B(G);
    • Threat
      • QAR1(I)
    • Vars
      • K(d);N_GUARD,P_SPINS(e),S_CUTS(f),S_FLIGHT::B(B)
      • K(d);N_GUARD,P_SPINS(e),S_FLIGHT::B(B)
      • P(g);::QAR1(I),XP(g)
      • S(e);::S(E)
      • S(f);::S(E)
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