MESON Chess Problem Database

Problem Display
PID: 272751 (8/5N2/1K4Q1/3k3r/bR1n4/4p3/8/8 w - - 0 1)

Sonnenfeld, Felix Alexander

The Problemist, 1957

8/5N2/1K4Q1/3k3r/bR1n4/4p3/8/8

#2

4 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qe4#
      • 2.Qd6#
    • 1...Se2
      • 2.Qe4#
      • 2.Qd6#
    • 1...Sb3
      • 2.Qe4#
      • 2.Qd6#
    • 1...Sf3
      • 2.Qe4#
      • 2.Qd6#
    • 1...Sb5
      • 2.Qe4#
      • 2.Qc6#
    • 1...Sc6
      • 2.Qe4#
      • 2.Qd6#
    • 1...Se6
      • 2.Qe4#
      • 2.Qg2#
  • Keys
    • 1.Qf6!
      • threat
        • 2.Rxd4#
      • 1...Ke4
        • 2.Rxd4#
      • 1...Rh4
        • 2.Qe5#
      • 1...Re5
        • 2.Qxe5#
      • 1...Sc2
        • 2.Qd6#
      • 1...Se2
        • 2.Qd6#
      • 1...Sb3
        • 2.Qd6#
      • 1...Sf3
        • 2.Qd6#
      • 1...Sb5
        • 2.Qc6#
      • 1...Sf5
        • 2.Qe5#
      • 1...Sc6
        • 2.Qd6#
      • 1...Se6
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Actual
    • Q(C);
    • Threat
      • R1(A),XS(c)
    • Vars
      • K(d);P_SPINS(c),S_FLIGHT::R1(A),XS(c)
      • R(e);N_GUARD::QAR1(C)
      • R(e);N_GUARD::QAR1(C),XR(e)
      • S(c);::QAR1(C)
      • S(c);N_GUARD,S_CUTB(b)::QAB1(C)
      • S(c);S_CUTR(e)::QAR1(C)
      • S(c);N_GUARD,SBLOCK::QAB(C)
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