MESON Chess Problem Database

Problem Display
PID: 29795 (8/8/R2n4/8/2k1P1R1/4Q3/K7/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/8/R2n4/8/2k1P1R1/4Q3/K7/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Ra4#
  • Tries
    • 1.Rg5?
      • threat
        • 2.Ra4#
      • 1...Kb4
        • 2.Qc5#
        • 2.Qb3#
      • 1...Sf5!
    • 1.e5+?
      • 1...Kb5
        • 2.Qb6#
      • 1...Kd5
        • 2.Rxd6#
      • 1...Se4!
  • Keys
    • 1.Ra5!
      • 1...Kb4
        • 2.Qc5#
      • 1...Sxe4
        • 2.Rxe4#
      • 1...Sb5
        • 2.Ra4#
      • 1...Sf5
        • 2.exf5#
      • 1...Sb7
        • 2.e5#
      • 1...Sf7
        • 2.e5#
      • 1...Sc8
        • 2.e5#
      • 1...Se8
        • 2.e5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(b);SBLOCK::R(E)
  • Tries
    • Try
      • R(D);
      • Threat
        • R(E)
      • Refutation
        • S(b);
    • Try
      • P(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
        • K(a);S_FLIGHT::R1(E),XS(b)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • R(E);
    • Vars
      • K(a);P-FLIGHT::QAB1(B)
      • S(b);OGATE,P_SPINS(b),XP(C)::R(D),XS(b)
      • S(b);SBLOCK::R(E)
      • S(b);OGATE::R(D)+P(C),XS(b)
      • S(b);N_GUARD::R(D)+P(C)
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