MESON Chess Problem Database

Problem Display
PID: 47189 (8/8/5K2/4p3/5pk1/1Q4p1/8/7R w - - 0 1)

Lincoln, Robert A

Still More Fun with Chess Miniatures, 2002

8/8/5K2/4p3/5pk1/1Q4p1/8/7R

#2

3 + 4

136 Problem Observer 2008
145 StrateGems 2012

SOLUTION

  • SOUND
  • Sets
    • 1...g2
      • 2.Qh3#
  • Tries
    • 1.Kxe5?
      • 1...Kg5
        • 2.Qg8#
      • 1...f3
        • 2.Qg8#
      • 1...g2!
    • 1.Qd3?
      • 1...f3
        • 2.Qe4#
        • 2.Qf5#
      • 1...g2
        • 2.Qh3#
      • 1...e4!
    • 1.Qb7?
      • 1...g2
        • 2.Qxg2#
      • 1...f3
        • 2.Qe4#
      • 1...e4!
  • Keys
    • 1.Qd5!
      • 1...g2
        • 2.Qxg2#
      • 1...f3
        • 2.Qe4#
      • 1...e4
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATE::QAB1(B)
  • Tries
    • Try
      • K(C);S_FLIGHT,XP(d)
      • Vars
        • K(c);P-FLIGHT::QAR(B)
        • P(b);SBLOCK::QAR(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);
      • Vars
        • P(a);OGATE::QAB1(B)
      • Refutation
        • P(d);
    • Try
      • Q(B);
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
        • P(b);OGATEB::QAR2(B)
      • Refutation
        • P(d);
  • Actual
    • Q(B);
    • Vars
      • P(a);OGATEB::QAR2(B),XP(a)
      • P(b);OGATEB::QAR2(B)
      • P(d);OGATE::QAB1(B)
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