MESON Chess Problem Database

Problem Display
PID: 159872 (8/K2nP3/2pp2N1/p4nQ1/r1Bpkp2/6P1/2b1PB1b/2qR4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Freie Presse, 1966

8/K2nP3/2pp2N1/p4nQ1/r1Bpkp2/6P1/2b1PB1b/2qR4

#2

9 + 12

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Qxf4#
    • 1...Qa3
      • 2.Qxf4#
    • 1...Qa1
      • 2.Qxf4#
    • 1...Qb1
      • 2.Qxf4#
    • 1...Qxd1
      • 2.Qxf4#
    • 1...Se3
      • 2.Qxf4#
    • 1...Sxg3
      • 2.Rxd4#
    • 1...Sh4
      • 2.Rxd4#
    • 1...Sh6
      • 2.Rxd4#
    • 1...Sxe7
      • 2.Rxd4#
    • 1...Sg7
      • 2.Rxd4#
  • Tries
    • 1.g4?
      • threat
        • 2.Qxf5#
      • 1...Sxe7
        • 2.Rxd4#
      • 1...Sg3
        • 2.Rxd4#
      • 1...Sh4
        • 2.Rxd4#
      • 1...Sh6
        • 2.Rxd4#
      • 1...Sg7
        • 2.Rxd4#
      • 1...Se3!
    • 1.e8Q+?
      • 1...Se7
        • 2.Rxd4#
      • 1...Se5!
    • 1.e8R+?
      • 1...Se7
        • 2.Rxd4#
      • 1...Se5!
  • Keys
    • 1.Sh4!
      • threat
        • 2.Qxf5#
      • 1...Ke5
        • 2.e8Q#
        • 2.e8R#
      • 1...Sxg3
        • 2.Rxd4#
      • 1...Sxh4
        • 2.Rxd4#
      • 1...Sxe7
        • 2.Rxd4#
      • 1...Se3
        • 2.Qxf4#
      • 1...Sh6
        • 2.Rxd4#
      • 1...Sg7
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::QAR1(F),XP(g)
    • Q(a);N_GUARD,XR(A)::QAR1(F),XP(g)
    • S(i);S_CUTQ(a)::QAR1(F),XP(g)
    • S(i);N_GUARD,XP(D)::R1(A),XP(e)
    • S(i);N_GUARD::R1(A),XP(e)
    • S(i);N_GUARD,XP(I)::R1(A),XP(e)
  • Tries
    • Try
      • P(D);
      • Threat
        • QAB1(F),XS(i)
      • Vars
        • S(i);N_GUARD,XP(I)::R1(A),XP(e)
        • S(i);N_GUARD::R1(A),XP(e)
      • Refutation
        • S(i);
    • Try
      • P(I);CHECK
      • Vars
        • S(i);P_SPINS(i)::R1(A),XP(e)
      • Refutation
        • S(l);P_SPINS(l)
    • Try
      • P(I);CHECK
      • Vars
        • S(i);P_SPINS(i)::R1(A),XP(e)
      • Refutation
        • S(l);P_SPINS(l)
  • Actual
    • S(G);
    • Threat
      • QAB1(F),XS(i)
    • Vars
      • K(f);P-FLIGHT,P_SPINS(i)::P=Q
      • S(i);N_GUARD,XP(D)::R1(A),XP(e)
      • S(i);N_GUARD,XS(G)::R1(A),XP(e)
      • S(i);N_GUARD,XP(I)::R1(A),XP(e)
      • S(i);S_CUTQ(a)::QAR1(F),XP(g)
      • S(i);N_GUARD::R1(A),XP(e)
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