MESON Chess Problem Database

Problem Display
PID: 228739 (5Q2/4nP1k/8/5P2/4K3/8/2B5/8 w - - 0 1)

Maleika, Gerhard

Deutsche Schachzeitung, 1981

5Q2/4nP1k/8/5P2/4K3/8/2B5/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sg8
      • 2.fxg8Q#
  • Tries
    • 1.Ke3?
      • 1...Sxf5+
        • 2.Bxf5#
      • 1...Sg8
        • 2.fxg8Q#
      • 1...Sc6
        • 2.f6#
      • 1...Sg6
        • 2.fxg6#
      • 1...Sc8
        • 2.f6#
      • 1...Sd5+!
    • 1.Kd4?
      • 1...Sxf5+
        • 2.Bxf5#
      • 1...Sg8
        • 2.fxg8Q#
      • 1...Sd5
        • 2.f6#
      • 1...Sg6
        • 2.fxg6#
      • 1...Sc8
        • 2.f6#
      • 1...Sc6+!
    • 1.Kf4?
      • 1...Sg6+
        • 2.fxg6#
      • 1...Sxf5
        • 2.Bxf5#
      • 1...Sg8
        • 2.fxg8Q#
      • 1...Sc6
        • 2.f6#
      • 1...Sc8
        • 2.f6#
      • 1...Sd5+!
    • 1.Ke5?
      • 1...Sg6+
        • 2.fxg6#
      • 1...Sxf5
        • 2.Bxf5#
      • 1...Sg8
        • 2.fxg8Q#
      • 1...Sd5
        • 2.f6#
      • 1...Sc8
        • 2.f6#
      • 1...Sc6+!
    • 1.Qxe7?
      • threat
        • 2.f8Q#
      • 1...Kg7
        • 2.f8Q#
      • 1...Kh8
        • 2.f8Q#
        • 2.f8R#
      • 1...Kh6!
  • Keys
    • 1.Kf3!
      • 1...Sxf5
        • 2.Bxf5#
      • 1...Sg8
        • 2.fxg8Q#
      • 1...Sd5
        • 2.f6#
      • 1...Sc6
        • 2.f6#
      • 1...Sg6
        • 2.fxg6#
      • 1...Sc8
        • 2.f6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE::PXS(a)=Q
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • S(a);CHECK,OGATE,P_SPINS(a),XP(C)::B(A),XS(a)
        • S(a);OGATE::PXS(a)=Q
        • S(a);N_GUARD::B(A)+P(C)
        • S(a);OGATE::P(C),XS(a)
      • Refutation
        • S(a);CHECK
    • Try
      • K(B);P-FLIGHT
      • Vars
        • S(a);CHECK,OGATE,P_SPINS(a),XP(C)::B(A),XS(a)
        • S(a);OGATE::PXS(a)=Q
        • S(a);N_GUARD::B(A)+P(C)
        • S(a);OGATE::P(C),XS(a)
      • Refutation
        • S(a);CHECK
    • Try
      • K(B);P-FLIGHT
      • Vars
        • S(a);CHECK,OGATE::P(C),XS(a)
        • S(a);OGATE,P_SPINS(a),XP(C)::B(A),XS(a)
        • S(a);OGATE::PXS(a)=Q
        • S(a);N_GUARD::B(A)+P(C)
      • Refutation
        • S(a);CHECK
    • Try
      • K(B);P-FLIGHT
      • Vars
        • S(a);CHECK,OGATE::P(C),XS(a)
        • S(a);OGATE,P_SPINS(a),XP(C)::B(A),XS(a)
        • S(a);OGATE::PXS(a)=Q
        • S(a);N_GUARD::B(A)+P(C)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(E);XS(a)
      • Threat
        • P=Q
      • Vars
        • K(b);P-FLIGHT::P=Q
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • K(B);S_FLIGHT
    • Vars
      • S(a);OGATE,P_SPINS(a),XP(C)::B(A),XS(a)
      • S(a);OGATE::PXS(a)=Q
      • S(a);N_GUARD::B(A)+P(C)
      • S(a);OGATE::P(C),XS(a)
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