MESON Chess Problem Database

Problem Display
PID: 153280 (1K2k3/1Q6/8/3P4/8/6n1/7R/5r2 w - - 0 1)

Lincoln, Robert A

StrateGems, 2012

1K2k3/1Q6/8/3P4/8/6n1/7R/5r2

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.Rh8#
    • 1...Ra1
      • 2.Rh8#
    • 1...Rb1
      • 2.Rh8#
    • 1...Rc1
      • 2.Rh8#
    • 1...Rd1
      • 2.Rh8#
    • 1...Re1
      • 2.Rh8#
    • 1...Rg1
      • 2.Rh8#
    • 1...Sf5
      • 2.Rh8#
  • Tries
    • 1.Rc2?
      • threat
        • 2.Rc8#
      • 1...Kd8
        • 2.Rc8#
      • 1...Kf8
        • 2.Rc8#
      • 1...Rc1!
    • 1.Rh7?
      • threat
        • 2.Qc8#
        • 2.Qe7#
      • 1...Kd8
        • 2.Qc8#
        • 2.Qd7#
        • 2.Qe7#
      • 1...Kf8
        • 2.Rh8#
        • 2.Qc8#
      • 1...Rb1
        • 2.Rh8#
      • 1...Rc1
        • 2.Rh8#
        • 2.Qe7#
      • 1...Re1
        • 2.Rh8#
        • 2.Qc8#
      • 1...Sf5
        • 2.Rh8#
        • 2.Qc8#
      • 1...Rf7!
    • 1.Qd7+?
      • 1...Kf8
        • 2.Rh8#
      • 1...Kxd7!
  • Keys
    • 1.d6!
      • threat
        • 2.Qe7#
      • 1...Kd8
        • 2.Qc8#
        • 2.Qe7#
      • 1...Kf8
        • 2.Rh8#
      • 1...Rb1
        • 2.Rh8#
      • 1...Re1
        • 2.Rh8#
      • 1...Rf7
        • 2.Qc8#
      • 1...Sf5
        • 2.Rh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • K(c);P-FLIGHT::R(A)
    • R(a);N_GUARD::R(A)
    • R(a);N_GUARD,P_PINQ(C)::R(A)
    • S(b);S_CUTR(a)::R(A)
  • Tries
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • K(c);P-FLIGHT::R1(A)
        • K(c);P-FLIGHT::R(A)
      • Refutation
        • R(a);
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);N_GUARD,P_PINQ(C)::R(A)
      • Refutation
        • R(a);
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::R(A)
      • Refutation
        • K(c);S_FLIGHT,XQ(C)
  • Actual
    • P(B);
    • Threat
      • QAR1(C)
    • Vars
      • K(c);P-FLIGHT::R(A)
      • R(a);N_GUARD,P_PINQ(C)::R(A)
      • R(a);N_GUARD::R(A)
      • R(a);SBLOCK::QAR2(C)
      • S(b);S_CUTR(a)::R(A)
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