MESON Chess Problem Database

Problem Display
PID: 81653 (5R2/2r5/4k3/2p5/2N1K3/1Q6/8/8 w - - 0 1)

Lincoln, Robert A

The Problemist Supplement, 2008

5R2/2r5/4k3/2p5/2N1K3/1Q6/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Re7
      • 2.Qh3#
  • Tries
    • 1.Qg3?
      • threat
        • 2.Qd6#
      • 1...Kd7
        • 2.Qd6#
      • 1...Ke7
        • 2.Qd6#
      • 1...Rd7
        • 2.Qe5#
      • 1...Rc6!
    • 1.Qb6+?
      • 1...Kd7
        • 2.Qd6#
      • 1...Ke7
        • 2.Qd6#
      • 1...Rc6!
  • Keys
    • 1.Qb8!
      • 1...Kd7
        • 2.Qe8#
      • 1...Ke7
        • 2.Qe8#
      • 1...Rf7
        • 2.Qd6#
      • 1...Rc6
        • 2.Qe8#
      • 1...Ra7
        • 2.Qd6#
      • 1...Rb7
        • 2.Qd6#
      • 1...Rd7
        • 2.Qe5#
      • 1...Re7
        • 2.Qd6#
      • 1...Rg7
        • 2.Qd6#
      • 1...Rh7
        • 2.Qd6#
      • 1...Rc8
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
        • K(b);P-FLIGHT::QAB1(A)
        • R(c);SBLOCK::QAR1(A)
      • Refutation
        • R(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::QAB1(A)
      • K(b);P-FLIGHT::QAR1(A)
      • R(c);OGATE::QAR1(A)
      • R(c);N_GUARD::QAR2(A)
      • R(c);OGATE,SBLOCK::QAR1(A)
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