MESON Chess Problem Database

Problem Display
PID: 81048 (6rN/2Q3Pk/4B3/8/8/8/8/5K2 w - - 0 1)

Andreev, Aleksandr Grigorevich

Sovietskaya Kuban, 1966

6rN/2Q3Pk/4B3/8/8/8/8/5K2

#2

5 + 2

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg7
      • 2.Qh2#
    • 1...Rf8+
      • 2.gxf8Q#
  • Tries
    • 1.Qc2+?
      • 1...Kh6
        • 2.Qg6#
      • 1...Kxg7!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qg6#
      • 1...Kh6
        • 2.Qg6#
      • 1...Rxg7
        • 2.Qh5#
      • 1...Rxh8
        • 2.g8S#
      • 1...Rf8
        • 2.gxf8Q#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(b);P_SPINR(b),SBLOCK,XP(D)::QAR(C)
    • R(b);CHECK,OGATE::PXR(b)=Q
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT,XP(D)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(a);P-FLIGHT::QAR1(C)
      • R(b);P_SPINR(b),SBLOCK,XP(D)::QAR2(C)
      • R(b);OGATE,SBLOCK,XS(E)::P=S
      • R(b);OGATE,P_PINQ(C)::PXR(b)=Q
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