MESON Chess Problem Database

Problem Display
PID: 210913 (8/3p2p1/N5P1/2Pk1p2/K4P1Q/3P4/3P4/8 w - - 0 1)

Ernst, Erich

Badische Neueste Nachrichten, 1989

8/3p2p1/N5P1/2Pk1p2/K4P1Q/3P4/3P4/8

#2

8 + 4

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Sc7#
  • Tries
    • 1.Qf6?
      • threat
        • 2.Qd6#
      • 1...d6
        • 2.Qxd6#
      • 1...gxf6!
    • 1.Qe7?
      • threat
        • 2.Qd6#
        • 2.Qxd7#
      • 1...Kd4
        • 2.Qd6#
        • 2.Qxd7#
      • 1...d6
        • 2.Qxd6#
      • 1...Kc6!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qxd7#
      • 1...Kd4
        • 2.Qxd7#
      • 1...Kc6
        • 2.Qa8#
      • 1...Ke6
        • 2.Sc7#
      • 1...d6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::S(G)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • P(c);::QAR1(E),XP(c)
      • Refutation
        • P(d);XQ(E)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAR1(E),XP(c)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(E);P_PINP(c)
    • Threat
      • QAR2(E),XP(c)
    • Vars
      • K(a);P-FLIGHT::QAR(E),XP(c)
      • K(a);N_SPINP(c),S_FLIGHT::QAB(E)
      • K(a);N_SPINP(c),S_FLIGHT::S(G)
      • P(c);OGATE::QAR1(E),XP(c)
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