MESON Chess Problem Database

Problem Display
PID: 45742 (2BK4/8/3p4/r2k4/6R1/8/1Q6/8 w - - 0 1)

Lincoln, Robert A

The Problemist Supplement, 2002

2BK4/8/3p4/r2k4/6R1/8/1Q6/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qb5#
    • 1...Ra2
      • 2.Qb5#
    • 1...Ra3
      • 2.Qb5#
    • 1...Ra4
      • 2.Qb5#
    • 1...Rb5
      • 2.Qxb5#
    • 1...Ra6
      • 2.Qb5#
    • 1...Ra7
      • 2.Qb5#
    • 1...Ra8
      • 2.Qb5#
  • Tries
    • 1.Bb7+?
      • 1...Kc5
        • 2.Qb4#
      • 1...Ke6!
    • 1.Bd7?
      • threat
        • 2.Qd4#
      • 1...Kc5
        • 2.Qd4#
      • 1...Ra4
        • 2.Qb5#
      • 1...Ra8+!
    • 1.Qb6?
      • 1...Ke5
        • 2.Qd4#
      • 1...Ra1
        • 2.Qb5#
      • 1...Ra2
        • 2.Qb5#
      • 1...Ra3
        • 2.Qb5#
      • 1...Ra4
        • 2.Qb5#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Ra6
        • 2.Qb5#
      • 1...Ra7
        • 2.Qb5#
      • 1...Ra8
        • 2.Qb5#
      • 1...Rc5!
  • Keys
    • 1.Qb4!
      • 1...Ke5
        • 2.Qd4#
      • 1...Kc6
        • 2.Bb7#
      • 1...Ra1
        • 2.Qb5#
      • 1...Ra2
        • 2.Qb5#
      • 1...Ra3
        • 2.Qb5#
      • 1...Ra4
        • 2.Qb5#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rc5
        • 2.Qe4#
      • 1...Ra6
        • 2.Qb5#
      • 1...Ra7
        • 2.Qb5#
      • 1...Ra8
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD::QAR2(A)
    • R(a);N_GUARD::QAR2(A),XR(a)
    • R(a);N_GUARD,P_PINB(C)::QAR2(A)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
        • R(a);N_GUARD::QAR2(A)
      • Refutation
        • R(a);CHECK
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
        • R(a);N_GUARD::QAR2(A)
        • R(a);N_GUARD::QAR2(A),XR(a)
        • R(a);N_GUARD,P_PINB(C)::QAR2(A)
      • Refutation
        • R(a);
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::QAB1(A)
      • K(b);S_FLIGHT::B(C)
      • R(a);N_GUARD::QAR2(A)
      • R(a);N_GUARD::QAR2(A),XR(a)
      • R(a);SBLOCK::QAB1(A)
      • R(a);N_GUARD,P_PINB(C)::QAR2(A)
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