MESON Chess Problem Database

Problem Display
PID: 23160 (5Q2/3p4/4k1K1/2R3b1/8/8/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

5Q2/3p4/4k1K1/2R3b1/8/8/8/8

#2

3 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Qf6#
    • 1...Bd2
      • 2.Qf6#
    • 1...Be3
      • 2.Qf6#
    • 1...Bf4
      • 2.Qf6#
    • 1...Bf6
      • 2.Qxf6#
    • 1...Bh6
      • 2.Qf6#
    • 1...d6
      • 2.Qf7#
  • Tries
    • 1.Kxg5?
      • threat
        • 2.Qf6#
      • 1...d6
        • 2.Qe8#
      • 1...d5!
    • 1.Rd5?
      • threat
        • 2.Qd6#
        • 2.Qf7#
      • 1...d6
        • 2.Qxd6#
        • 2.Qf7#
      • 1...Bf4
        • 2.Qf7#
      • 1...Be7
        • 2.Qf5#
        • 2.Qf7#
        • 2.Qg8#
      • 1...Kxd5!
    • 1.Rxg5?
      • threat
        • 2.Qf6#
      • 1...d6
        • 2.Qf7#
        • 2.Qe8#
      • 1...d5!
    • 1.Qf5+?
      • 1...Kd6
        • 2.Qe5#
      • 1...Ke7!
    • 1.Qe8+?
      • 1...Kd6
        • 2.Qe5#
      • 1...Be7!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qe5#
      • 1...Kd6
        • 2.Qe5#
      • 1...Bf4
        • 2.Qf6#
      • 1...Bf6
        • 2.Qxf6#
      • 1...d5
        • 2.Rc6#
      • 1...d6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::QAR1(C)
    • B(a);N_GUARD::QAR1(C),XB(a)
    • P(c);SBLOCK::QAB1(C)
  • Tries
    • Try
      • K(B);P-FLIGHT,XB(a)
      • Threat
        • QAR1(C)
      • Vars
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • P(c);
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT,XR(A)
    • Try
      • R(A);XB(a)
      • Threat
        • QAR1(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAB1(C)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(b);P-FLIGHT::QAB1(C)
      • B(a);N_GUARD::QAR1(C)
      • B(a);N_GUARD::QAR1(C),XB(a)
      • P(c);N_GUARD,SBLOCK::R(A)
      • P(c);SBLOCK::QAB1(C)
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