MESON Chess Problem Database

Problem Display
PID: 153145 (2n5/N2k1K1R/4R2Q/8/8/8/8/8 w - - 0 1)

Lincoln, Robert A

6th Comm., Seven Chess Notes, 2010

2n5/N2k1K1R/4R2Q/8/8/8/8/8

#2

5 + 2

145 StrateGems 2011

SOLUTION

  • SOUND
  • Tries
    • 1.Kf6+?
      • 1...Kd8
        • 2.Sc6#
        • 2.Qf8#
      • 1...Se7!
    • 1.Kf8+?
      • 1...Kd8
        • 2.Sc6#
        • 2.Re8#
      • 1...Se7!
    • 1.Kg8+?
      • 1...Kd8
        • 2.Sc6#
        • 2.Qf8#
      • 1...Se7+!
    • 1.Rc6?
      • 1...Sd6+
        • 2.Qxd6#
      • 1...Sxa7
        • 2.Qd6#
      • 1...Se7
        • 2.Qd6#
      • 1...Sb6
        • 2.Qd6#
      • 1...Kd8!
    • 1.Re7+?
      • 1...Kd8
        • 2.Sc6#
        • 2.Rh8#
        • 2.Qf8#
      • 1...Sxe7!
    • 1.Qd2+?
      • 1...Sd6+
        • 2.Qxd6#
      • 1...Kc7!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qxc8#
      • 1...Sd6+
        • 2.Qxd6#
      • 1...Kc7
        • 2.Qxc8#
      • 1...Sxa7
        • 2.Kf6#
      • 1...Se7
        • 2.Qxe7#
      • 1...Sb6
        • 2.Kf6#
        • 2.Qd6#
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);CHECK,P-FLIGHT
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • K(D);CHECK,P-FLIGHT
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • K(D);CHECK,S_FLIGHT
      • Refutation
        • S(b);CHECK,P_SPINS(b)
    • Try
      • R(A);
      • Vars
        • S(b);CHECK,N_GUARD::QAR1(B),XS(b)
        • S(b);N_GUARD,XS(C)::QAR1(B)
        • S(b);N_GUARD::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(A);CHECK
      • Refutation
        • S(b);XR(A)
    • Try
      • Q(B);CHECK
      • Vars
        • S(b);CHECK,N_GUARD,P_SPINS(b)::QAR1(B),XS(b)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XS(b)
    • Vars
      • S(b);CHECK,N_GUARD::QAR1(B),XS(b)
      • K(a);P-FLIGHT::QAR1(B),XS(b)
      • S(b);N_GUARD,XS(C)::R(E)+K(D)
      • S(b);N_GUARD::QAR1(B),XS(b)
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