MESON Chess Problem Database

Problem Display
PID: 7511 (6K1/5p2/6pk/8/5P2/7r/4Q3/8 w - - 0 1)

Lincoln, Robert A

The Problemist, 1990

6K1/5p2/6pk/8/5P2/7r/4Q3/8

#2

3 + 4

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Rh2
      • 2.Qxh2#
  • Tries
    • 1.Qg4?
      • threat
        • 2.Qxh3#
        • 2.Qg5#
      • 1...g5
        • 2.Qxg5#
      • 1...Rh1
        • 2.Qg5#
      • 1...Rh2
        • 2.Qg5#
      • 1...Ra3
        • 2.Qh4#
        • 2.Qg5#
      • 1...Rb3
        • 2.Qh4#
        • 2.Qg5#
      • 1...Rc3
        • 2.Qh4#
        • 2.Qg5#
      • 1...Rd3
        • 2.Qh4#
        • 2.Qg5#
      • 1...Re3
        • 2.Qh4#
        • 2.Qg5#
      • 1...Rf3
        • 2.Qh4#
        • 2.Qg5#
      • 1...Rg3
        • 2.Qh4#
      • 1...Rh4
        • 2.Qxh4#
        • 2.Qg5#
      • 1...f6
        • 2.Qxh3#
      • 1...Rh5!
    • 1.Qe5?
      • threat
        • 2.Qh8#
        • 2.Qg5#
      • 1...g5
        • 2.Qxg5#
      • 1...f5
        • 2.Qh8#
      • 1...Rg3
        • 2.Qh8#
      • 1...Rh5
        • 2.Qg7#
        • 2.Qh8#
      • 1...f6!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qg5#
      • 1...Kh5
        • 2.Qg5#
      • 1...g5
        • 2.Qxg5#
      • 1...Rg3
        • 2.Qh4#
      • 1...Rh5
        • 2.Qf8#
      • 1...f6
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(a);OGATEB::QAR(A),XR(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAB1(A),XP(b)
        • R(a);::QAB1(A)
        • R(a);N_GUARD::QAR2(A)
        • P(d);::QAR(A),XR(a)
      • Refutation
        • R(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAB1(A),XP(b)
        • P(d);::QAR2(A)
        • R(a);::QAR2(A)
      • Refutation
        • P(d);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(c);P-FLIGHT::QAR1(A)
      • P(b);::QAB1(A),XP(b)
      • R(a);N_GUARD::QAR2(A)
      • R(a);SBLOCK::QAB(A)
      • P(d);OGATE::QAR1(A)
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