MESON Chess Problem Database

Problem Display
PID: 15789 (6nr/5RPk/1Q6/8/8/8/8/7K w - - 0 1)

Lincoln, Robert A

US Problem Bulletin, 1987

6nr/5RPk/1Q6/8/8/8/8/7K

#2

4 + 3

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Tries
    • 1.Qf6?
      • threat
        • 2.gxh8Q#
        • 2.gxh8S#
        • 2.gxh8B#
        • 2.gxh8R#
      • 1...Sh6
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Se7
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Sxf6!
  • Keys
    • 1.Qg1!
      • 1...Kh6
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Sf6
        • 2.g8S#
      • 1...Se7
        • 2.g8S#
      • 1...Sh6
        • 2.g8Q#
        • 2.g8B#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(4)
      • Vars
        • S(b);::PXR(c)=Q
      • Refutation
        • S(b);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(a);P-FLIGHT::PXR(c)=Q
      • S(b);OGATE::P=S
      • S(b);OGATE,SBLOCK::P=Q
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