MESON Chess Problem Database

Problem Display
PID: 147106 (8/3b4/1R6/6B1/4k3/2Qp2K1/8/8 w - - 0 1)

Lincoln, Robert A

Australian Chess Problem Magazine, 1996

8/3b4/1R6/6B1/4k3/2Qp2K1/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Rb4+?
      • 1...Kf5
        • 2.Qf6#
      • 1...Kd5!
    • 1.Rb5?
      • threat
        • 2.Re5#
        • 2.Qb4#
        • 2.Qe5#
        • 2.Qc4#
      • 1...Be6
        • 2.Re5#
        • 2.Qe5#
      • 1...d2
        • 2.Re5#
        • 2.Qe3#
        • 2.Qc4#
      • 1...Bxb5!
    • 1.Qd4+?
      • 1...Kf5
        • 2.Qf4#
        • 2.Qd5#
      • 1...Kxd4!
    • 1.Qxd3+?
      • 1...Ke5
        • 2.Bf4#
        • 2.Bf6#
      • 1...Kxd3!
    • 1.Qc4+?
      • 1...Kf5
        • 2.Qd5#
        • 2.Qf4#
      • 1...Ke5!
    • 1.Qc5?
      • threat
        • 2.Rb4#
      • 1...Bb5
        • 2.Re6#
      • 1...Be6
        • 2.Rxe6#
      • 1...d2!
  • Keys
    • 1.Bf6!
      • threat
        • 2.Qe5#
      • 1...Ke3
        • 2.Qe1#
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf5
        • 2.Qxd3#
      • 1...d2
        • 2.Qf3#

FEATURES

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