MESON Chess Problem Database

Problem Display
PID: 23097 (3b4/7K/4N3/7k/6p1/8/5Q2/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

3b4/7K/4N3/7k/6p1/8/5Q2/8

#2

3 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bh4
      • 2.Qf7#
    • 1...Ba5
      • 2.Qh2#
    • 1...Bg5
      • 2.Sg7#
    • 1...Bb6
      • 2.Qh2#
  • Tries
    • 1.Qc5+?
      • 1...Bg5
        • 2.Qxg5#
      • 1...Kh4!
    • 1.Qd2?
      • threat
        • 2.Qh6#
      • 1...Kh4
        • 2.Qh2#
      • 1...Bg5
        • 2.Qxg5#
      • 1...g3!
    • 1.Qf5+?
      • 1...Bg5
        • 2.Qxg5#
      • 1...Kh4!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qh6#
      • 1...Kh4
        • 2.Qh2#
      • 1...Bg5
        • 2.Qxg5#
      • 1...g3
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(c);SBLOCK::QAB(A)
    • B(c);N_GUARD,SBLOCK::QAR(A)
    • B(c);SBLOCK::S(B)
    • B(c);N_GUARD::QAR(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR1(A),XB(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
        • B(c);N_GUARD::QAR1(A),XB(c)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR1(A),XB(c)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);P-FLIGHT,P_SPINP(a)::QAR2(A)
      • B(c);N_GUARD::QAR1(A),XB(c)
      • P(a);::S(B)
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