MESON Chess Problem Database

Problem Display
PID: 234735 (4b1r1/6Pk/5QR1/7K/8/8/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2013

4b1r1/6Pk/5QR1/7K/8/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg7
      • 2.Qxg7#
    • 1...Rf8
      • 2.gxf8S#
    • 1...Rh8
      • 2.gxh8Q#
      • 2.gxh8R#
    • 1...Ba4
      • 2.Rh6#
    • 1...Bb5
      • 2.Rh6#
    • 1...Bc6
      • 2.Rh6#
    • 1...Bxg6+
      • 2.Qxg6#
    • 1...Bd7
      • 2.Rh6#
  • Tries
    • 1.Kh4?
      • threat
        • 2.Rh6#
      • 1...Rxg7
        • 2.Qxg7#
      • 1...Rf8
        • 2.gxf8S#
      • 1...Rh8
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Bxg6!
  • Keys
    • 1.Kg5!
      • threat
        • 2.Rh6#
      • 1...Rxg7
        • 2.Qxg7#
      • 1...Bxg6
        • 2.Qxg6#
      • 1...Rf8
        • 2.gxf8S#
      • 1...Rh8
        • 2.gxh8Q#
        • 2.gxh8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • R(c);OGATE,XP(D)::QAR1(B),XR(c)
    • R(c);OGATE::PXR(c)=S
    • R(c);OGATE::PXR(c)=Q
    • B(b);N_PINR(C)::R1(C)
    • B(b);CHECK,OGATE,XR(C)::QAB1(B),XB(b)
  • Tries
    • Try
      • K(A);N_SPINR(C),P-FLIGHT
      • Threat
        • R1(C)
      • Vars
        • R(c);OGATE,XP(D)::QAR1(B),XR(c)
        • R(c);OGATE::PXR(c)=S
        • R(c);OGATE::PXR(c)=Q
      • Refutation
        • B(b);XR(C)
  • Actual
    • K(A);N_SPINR(C),P-FLIGHT
    • Threat
      • R1(C)
    • Vars
      • R(c);OGATE,P_PINR(C),XP(D)::QAR1(B),XR(c)
      • B(b);OGATE,XR(C)::QAB1(B),XB(b)
      • R(c);OGATE::PXR(c)=S
      • R(c);OGATE::PXR(c)=Q
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