MESON Chess Problem Database

Problem Display
PID: 217874 (1n6/8/6Q1/pkN5/2R5/8/4K3/8 w - - 0 1)

Ernst, Erich

Badische Neueste Nachrichten, 1995

1n6/8/6Q1/pkN5/2R5/8/4K3/8

#2

4 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sa6
      • 2.Qxa6#
    • 1...Sd7
      • 2.Qa6#
  • Tries
    • 1.Sd3?
      • 1...Sc6
        • 2.Qxc6#
      • 1...a4
        • 2.Rc5#
      • 1...Sa6
        • 2.Qc6#
      • 1...Sd7
        • 2.Qc6#
      • 1...Kxc4!
    • 1.Sa4?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sa6
        • 2.Qc6#
      • 1...Sd7
        • 2.Qc6#
      • 1...Kxc4!
  • Keys
    • 1.Sa6!
      • 1...Kxc4
        • 2.Qd3#
      • 1...Sxa6
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...a4
        • 2.Rc5#
      • 1...Sd7
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAB1(D),XS(c)
    • S(c);N_GUARD::QAB1(D)
  • Tries
    • Try
      • S(C);
      • Vars
        • S(c);N_GUARD::QAB1(D),XS(c)
        • P(a);SBLOCK::R1(B)
        • S(c);N_GUARD::QAB1(D)
      • Refutation
        • K(b);S_FLIGHT,XR(B)
    • Try
      • S(C);
      • Vars
        • S(c);N_GUARD::QAB1(D),XS(c)
        • S(c);N_GUARD::QAB1(D)
      • Refutation
        • K(b);S_FLIGHT,XR(B)
  • Actual
    • S(C);
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(B)::QAB1(D)
      • S(c);N_GUARD,XS(C)::QAB1(D)
      • S(c);N_GUARD::QAB1(D),XS(c)
      • P(a);SBLOCK::R1(B)
      • S(c);N_GUARD::QAB1(D)
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