MESON Chess Problem Database

Problem Display
PID: 64697 (1n6/RPk5/1nNR4/3p4/p1pQ4/B1K5/8/8 w - - 0 1)

Elekes, Dezso

Good Companions (August), 1921

1n6/RPk5/1nNR4/3p4/p1pQ4/B1K5/8/8

#2

7 + 6

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Sa6
      • 2.b8Q#
      • 2.b8R#
    • 1...Sd7
      • 2.b8Q#
      • 2.b8R#
  • Tries
    • 1.Qg7+?
      • 1...S8d7
        • 2.b8Q#
        • 2.b8R#
      • 1...S6d7!
    • 1.Qh8?
      • threat
        • 2.Qxb8#
        • 2.Qd8#
      • 1...Sxc6
        • 2.b8Q#
        • 2.b8B#
      • 1...S6d7
        • 2.Qd8#
      • 1...Sa8
        • 2.Qd8#
        • 2.bxa8S#
      • 1...Sc8
        • 2.Qd8#
        • 2.bxc8S#
      • 1...Sa6
        • 2.Qd8#
        • 2.b8Q#
        • 2.b8S#
        • 2.b8B#
        • 2.b8R#
      • 1...S8d7
        • 2.Qd8#
        • 2.b8Q#
        • 2.b8S#
        • 2.b8B#
        • 2.b8R#
      • 1...d4+!
  • Keys
    • 1.Rd8!
      • 1...Kxc6
        • 2.Qc5#
      • 1...Sxc6
        • 2.b8Q#
      • 1...S6d7
        • 2.Rc8#
      • 1...Sa8
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Sc8
        • 2.bxc8Q#
        • 2.bxc8R#
      • 1...Sa6
        • 2.b8S#
      • 1...S8d7
        • 2.b8S#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(f);OGATE::P=Q
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • S(f);OGATE,P_SPINS(f)::P=Q
      • Refutation
        • S(d);P_SPINS(d)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);OGATE,XS(D)::P=Q
        • S(d);::QAB1(C)
      • Refutation
        • P(c);CHECK
  • Actual
    • R(E);
    • Vars
      • K(e);OGATEB,P-FLIGHT,XS(D)::QAR1(C)
      • S(f);OGATE,SBLOCK,XS(D)::P=Q
      • S(d);N_GUARD,SBLOCK::R1(E)
      • S(d);OGATE::PXS(d)=Q
      • S(f);OGATE::P=S
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