MESON Chess Problem Database

Problem Display
PID: 159874 (2nK2B1/4pp1b/1rP3pR/R2Pk3/3Np3/2NP4/5Q2/B4n2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 1967

2nK2B1/4pp1b/1rP3pR/R2Pk3/3Np3/2NP4/5Q2/B4n2

#2

11 + 9

SOLUTION

  • SOUND
  • Tries
    • 1.Sce2?
      • threat
        • 2.Qf4#
      • 1...Kd6
        • 2.Sf5#
      • 1...f5
        • 2.Sb5#
      • 1...g5
        • 2.Sb3#
      • 1...Rb5!
    • 1.Qf4+?
      • 1...Kxd4
        • 2.Qxe4#
      • 1...Kxf4!
    • 1.Qf5+?
      • 1...Kxd4
        • 2.Qxe4#
      • 1...Kd6
        • 2.Sxe4#
      • 1...gxf5!
    • 1.d6+?
      • 1...Kxd6
        • 2.Sxe4#
        • 2.Rd5#
      • 1...Rb5!
  • Keys
    • 1.Sde2!
      • threat
        • 2.Qf4#
      • 1...Kd6
        • 2.Sxe4#
      • 1...f5
        • 2.Sb5#
      • 1...g5
        • 2.d4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(B)
      • Vars
        • K(c);P_SPINP(e),S_FLIGHT::S(E)
        • P(g);::B(A)+S(E)
        • P(e);::B(A)+S(E)
      • Refutation
        • R(d);
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT,XS(E)::QAR1(B),XP(b)
      • Refutation
        • K(c);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(E)::QAR1(B),XP(b)
        • K(c);P_SPINP(e),S_FLIGHT::S(C),XP(b)
      • Refutation
        • P(e);XQ(B)
    • Try
      • P(G);CHECK
      • Refutation
        • R(d);P_SPINR(d)
  • Actual
    • S(E);
    • Threat
      • QAB1(B)
    • Vars
      • K(c);P_SPINP(e),S_FLIGHT::S(C),XP(b)
      • P(g);::B(A)+S(C)
      • P(e);::P(D)
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