MESON Chess Problem Database

Problem Display
PID: 65179 (2k3r1/Q5P1/K4P2/8/8/8/8/8 w - - 0 1)

Lincoln, Robert A

Problem Observer, 2006

2k3r1/Q5P1/K4P2/8/8/8/8/8

#2

4 + 2

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rd8
      • 2.Qb7#
    • 1...Rf8
      • 2.gxf8Q#
      • 2.gxf8R#
    • 1...Rh8
      • 2.gxh8Q#
      • 2.gxh8R#
  • Tries
    • 1.Qd7+?
      • 1...Kb8
        • 2.Qb7#
      • 1...Kxd7!
  • Keys
    • 1.f7!
      • threat
        • 2.fxg8Q#
        • 2.fxg8R#
      • 1...Kd8
        • 2.fxg8Q#
        • 2.fxg8R#
      • 1...Rxg7
        • 2.f8Q#
        • 2.f8R#
      • 1...Rd8
        • 2.Qb7#
      • 1...Re8
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Rf8
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Rh8
        • 2.gxh8Q#
        • 2.gxh8R#

Anticipated by 6825(1933)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::QAB1(C)
    • R(b);OGATE::PXR(b)=Q
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
  • Actual
    • P(B);
    • Threat
      • PXR(b)=Q
    • Vars
      • K(a);P-FLIGHT::PXR(b)=Q
      • R(b);N_GUARD,XP(D)::P=Q
      • R(b);SBLOCK::QAB1(C)
      • R(b);OGATE::PXR(b)=Q
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