MESON Chess Problem Database

Problem Display
PID: 222886 (7b/2Q2Pk1/4BN1p/7b/8/8/8/4K3 w - - 0 1)

Meyer, Heinrich Friedrich Ludwig

Preston Guardian, 1880

(First published on Wed Feb 4 1880)

7b/2Q2Pk1/4BN1p/7b/8/8/8/4K3

#2

5 + 4

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf7
      • 2.Qxf7#
  • Tries
    • 1.Sxh5+?
      • 1...Kh7
        • 2.Bf5#
        • 2.Qc2#
        • 2.f8S#
      • 1...Kf8
        • 2.Qd6#
        • 2.Qd8#
        • 2.Qc5#
      • 1...Kg6!
    • 1.Se8+?
      • 1...Kh7
        • 2.f8S#
      • 1...Kf8
        • 2.Qd6#
        • 2.Qc5#
      • 1...Kg6!
    • 1.Qe7?
      • 1...Bxf7
        • 2.Qxf7#
      • 1...Bd1
        • 2.f8S#
      • 1...Be2
        • 2.f8S#
      • 1...Bf3
        • 2.f8S#
      • 1...Bg4
        • 2.f8S#
      • 1...Bg6
        • 2.f8Q#
        • 2.f8B#
      • 1...Kg6!
  • Keys
    • 1.Sh7!
      • 1...Kg6
        • 2.f8S#
      • 1...Kxh7
        • 2.f8S#
      • 1...Bxf7
        • 2.Qxf7#
      • 1...Bd1
        • 2.f8S#
      • 1...Be2
        • 2.f8S#
      • 1...Bf3
        • 2.f8S#
      • 1...Bg4
        • 2.f8S#
      • 1...Bg6
        • 2.f8Q#
        • 2.f8B#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(a);OGATE,P_SPINB(a),XP(E)::QAR1(D),XB(a)
  • Tries
    • Try
      • S(C);CHECK,XB(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(c);P-FLIGHT::P=S
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(D);
      • Vars
        • B(a);OGATE,P_SPINB(a),XP(E)::QAR1(D),XB(a)
        • B(a);::P=S
        • B(a);SBLOCK::P=Q
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(c);P-FLIGHT::P=S
      • K(c);P-FLIGHT,XS(C)::P=S
      • B(a);OGATE,P_SPINB(a),XP(E)::QAR1(D),XB(a)
      • B(a);::P=S
      • B(a);SBLOCK::P=Q
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