MESON Chess Problem Database

Problem Display
PID: 153142 (7k/7P/8/7n/6R1/5R2/8/3K1Q2 w - - 0 1)

Lincoln, Robert A

1/2 Prize, Seven Chess Notes, 2010

7k/7P/8/7n/6R1/5R2/8/3K1Q2

#2

5 + 2

145 StrateGems 2011

SOLUTION

  • SOUND
  • Tries
    • 1.Rf7?
      • threat
        • 2.Rg8#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sg7!
    • 1.Qd3?
      • threat
        • 2.Rf8#
        • 2.Rg8#
      • 1...Sf4
        • 2.Rg8#
      • 1...Sg7
        • 2.Rf8#
      • 1...Sf6!
    • 1.Qh3?
      • 1...Kxh7
        • 2.Qxh5#
      • 1...Sg3
        • 2.Rf8#
        • 2.Rg8#
      • 1...Sf4
        • 2.Rg8#
      • 1...Sg7
        • 2.Rf8#
      • 1...Sf6!
    • 1.Qh1?
      • 1...Kxh7
        • 2.Qxh5#
      • 1...Sg3
        • 2.Rf8#
        • 2.Rg8#
      • 1...Sf4
        • 2.Rg8#
      • 1...Sg7
        • 2.Rf8#
      • 1...Sf6!
  • Keys
    • 1.Rh3!
      • 1...Kxh7
        • 2.Rxh5#
      • 1...Sg3
        • 2.Rg8#
        • 2.Qf6#
        • 2.Qf8#
      • 1...Sf4
        • 2.Rg8#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sg7
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);
      • Threat
        • R1(D)
      • Vars
        • S(a);N_GUARD::QAB(B),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::R1(D)
        • S(a);::R(C)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Vars
        • K(b);OGATEB,P-FLIGHT,P_SPINS(a),XP(E)::QAR2(B),XS(a)
        • S(a);::R1(D)
        • S(a);::R(C)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Vars
        • K(b);OGATEB,P-FLIGHT,P_SPINS(a),XP(E)::QAR2(B),XS(a)
        • S(a);::R1(D)
        • S(a);::R(C)
      • Refutation
        • S(a);
  • Actual
    • R(C);
    • Vars
      • K(b);OGATEB,P-FLIGHT,P_SPINS(a),XP(E)::R(C),XS(a)
      • S(a);::R1(D)
      • S(a);N_GUARD::QAB(B),XS(a)
      • S(a);::QAR2(B)
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