MESON Chess Problem Database

Problem Display
PID: 134110 (5R1K/5P2/6pk/5r2/6Q1/8/8/8 w - - 0 1)

McDowell, Michael

The Problemist Supplement, 2009

5R1K/5P2/6pk/5r2/6Q1/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Qh4#
    • 1...Rf2
      • 2.Qh4#
    • 1...Rf3
      • 2.Qh4#
    • 1...Rf6
      • 2.Qh4#
    • 1...Rxf7
      • 2.Qh4#
  • Tries
    • 1.Qxf5?
      • 1...g5
        • 2.Qh7#
      • 1...gxf5!
  • Keys
    • 1.Rg8!
      • threat
        • 2.Rxg6#
        • 2.Qxg6#
      • 1...Rg5
        • 2.f8Q#
        • 2.f8B#
      • 1...Rf6
        • 2.Qh4#
      • 1...g5
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD::QAR2(A)
    • R(a);N_GUARD,XP(B)::QAR2(A)
  • Tries
    • Try
      • Q(A);XR(a)
      • Vars
        • P(b);OGATE,SBLOCK::QAR1(A)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • R(C);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);N_GUARD::P=Q
      • R(a);N_GUARD::QAR2(A)
      • P(b);S_CUTR(a)::QAR(A)
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