MESON Chess Problem Database

Problem Display
PID: 23052 (6N1/8/6p1/6pk/7P/8/5QK1/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

6N1/8/6p1/6pk/7P/8/5QK1/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kg4
      • 2.Sf6#
  • Tries
    • 1.Kh3?
      • 1...gxh4
        • 2.Qxh4#
      • 1...g4+!
    • 1.Qd4?
      • 1...g4
        • 2.Qh8#
      • 1...gxh4!
    • 1.Qc5?
      • threat
        • 2.Qxg5#
      • 1...Kg4
        • 2.Qxg5#
      • 1...Kxh4!
    • 1.Qd2?
      • threat
        • 2.Qxg5#
      • 1...Kg4
        • 2.Qxg5#
      • 1...gxh4
        • 2.Sf6#
      • 1...g4
        • 2.Qg5#
        • 2.Qh6#
      • 1...Kxh4!
    • 1.Qf3+?
      • 1...Kxh4
        • 2.Qh3#
      • 1...g4!
    • 1.Qf4?
      • threat
        • 2.Qxg5#
      • 1...gxh4
        • 2.Sf6#
      • 1...g4
        • 2.Qg5#
        • 2.Qh6#
      • 1...gxf4!
    • 1.Qf5?
      • threat
        • 2.Qxg5#
      • 1...Kxh4
        • 2.Qh3#
      • 1...gxf5!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qxg5#
      • 1...Kg4
        • 2.Qxg5#
      • 1...Kxh4
        • 2.Qh3#
      • 1...gxh4
        • 2.Sf6#
      • 1...g4
        • 2.Qg5#
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(D)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • P(a);OGATE,XP(C)::QAR1(A),XP(a)
      • Refutation
        • P(a);CHECK
    • Try
      • Q(A);
      • Vars
        • P(a);SBLOCK::QAR(A)
      • Refutation
        • P(a);XP(C)
    • Try
      • Q(A);P_PINP(a)
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAR1(A),XP(a)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT,XP(C)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);S_FLIGHT::QAR1(A),XP(a)
        • P(a);SBLOCK,XP(C)::S(D)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(C)::QAR1(A)
      • Refutation
        • P(a);P_SPINP(a)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • P(a);XP(C)::S(D)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);P_PINP(a)
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);N_SPINP(a),OGATEB,P-FLIGHT,XP(C)::QAR1(A)
      • Refutation
        • P(c);N_SPINP(a),XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(a)
    • Vars
      • K(b);S_FLIGHT::QAR1(A),XP(a)
      • K(b);OGATEB,P-FLIGHT,XP(C)::QAR1(A)
      • P(a);SBLOCK,XP(C)::S(D)
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