MESON Chess Problem Database

Problem Display
PID: 47429 (8/8/8/4Qp1p/3p4/7k/7N/6K1 w - - 0 1)

Lincoln, Robert A

Still More Fun with Chess Miniatures, 2002

8/8/8/4Qp1p/3p4/7k/7N/6K1

#2

3 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Kf2?
      • threat
        • 2.Qg3#
      • 1...Kh4
        • 2.Qg3#
      • 1...f4
        • 2.Qxh5#
      • 1...h4!
    • 1.Qf4?
      • 1...h4
        • 2.Qf3#
      • 1...d3!
  • Keys
    • 1.Sf1!
      • threat
        • 2.Qg3#
      • 1...Kg4
        • 2.Qg3#
      • 1...Kh4
        • 2.Qg3#
      • 1...f4
        • 2.Qxh5#
      • 1...h4
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • P(c);OGATE::QAR2(C),XP(d)
      • Refutation
        • P(d);
    • Try
      • Q(C);
      • Vars
        • P(d);SBLOCK::QAR2(C)
      • Refutation
        • P(b);
  • Actual
    • S(B);
    • Threat
      • QAR1(C)
    • Vars
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);P-FLIGHT::QAB1(C)
      • P(c);OGATE::QAR2(C),XP(d)
      • P(d);SBLOCK::QAB(C),XP(c)
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