MESON Chess Problem Database

Problem Display
PID: 160370 (8/8/k7/5Q1K/2P5/7B/1r6/6B1 w - - 0 1)

Lincoln, Robert A

British Chess Magazine, 2007

8/8/k7/5Q1K/2P5/7B/1r6/6B1

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kb7
      • 2.Qc8#
    • 1...Ra2
      • 2.Qb5#
    • 1...Rc2
      • 2.Qb5#
    • 1...Rd2
      • 2.Qb5#
    • 1...Re2
      • 2.Qb5#
    • 1...Rg2
      • 2.Qb5#
    • 1...Rh2
      • 2.Qb5#
    • 1...Rb5
      • 2.Qxb5#
  • Tries
    • 1.Qe6+?
      • 1...Kb7
        • 2.Qc8#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Ka5!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qa7#
      • 1...Kb7
        • 2.Qc8#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Rf2
        • 2.Bc8#
      • 1...Rb7
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • K(b);S_FLIGHT::QAB1(D)
    • R(a);N_GUARD::QAB1(D)
    • R(a);N_GUARD,P_PINB(B)::QAB1(D)
    • R(a);N_GUARD,P_PINQ(D)::QAB1(D),XR(a)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(D)
        • R(a);N_GUARD,P_SPINR(a)::QAR1(D),XR(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(D);
    • Threat
      • QAR1(D)
    • Vars
      • K(b);S_FLIGHT::QAB1(D)
      • R(a);N_GUARD,P_PINQ(D)::QAB1(D),XR(a)
      • R(a);N_GUARD::QAR1(D),XR(a)
      • R(a);N_GUARD::B(B)
      • R(a);SBLOCK::QAR(D)
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