MESON Chess Problem Database

Problem Display
PID: 47973 (6Qq/6PP/5KBk/8/8/8/8/8 w - - 0 1)

Subotic, Miroslav

Probleemblad, 2003

6Qq/6PP/5KBk/8/8/8/8/8

#2

5 + 2

3713 Snap 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg7+
      • 2.Qxg7#
    • 1...Qxh7
      • 2.Qxh7#
    • 1...Qxg8
      • 2.hxg8S#
  • Keys
    • 1.Qf8!
      • threat
        • 2.gxh8Q#
        • 2.gxh8S#
        • 2.gxh8B#
        • 2.gxh8R#
      • 1...Qxg7+
        • 2.Qxg7#
      • 1...Qxf8+
        • 2.gxf8Q#
        • 2.gxf8B#
      • 1...Qxh7
        • 2.g8S#
      • 1...Qg8
        • 2.hxg8S#

Anticipated by 24450(1925-1926)

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(b);CHECK,OGATE,XP(C)::QAB1(E),XQ(b)
    • Q(b);N_PINP(C),OGATE,XP(D)::QAR1(E),XQ(b)
    • Q(b);N_PINP(C),OGATE,XQ(E)::PXQ(b)=S
  • Actual
    • Q(E);
    • Threat
      • DUALS(4)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XP(C)::QAB1(E),XQ(b)
      • Q(b);CHECK,N_PINP(C),XQ(E)::PXQ(b)=Q
      • Q(b);N_PINP(C),XP(D)::P=S
      • Q(b);N_PINP(C),OGATE::PXQ(b)=S
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