MESON Chess Problem Database

Problem Display
PID: 166712 (K1kn4/8/4P3/B7/8/8/2r5/Q7 w - - 0 1)

Lincoln, Robert A

Sp. Comm., StrateGems, 2016

K1kn4/8/4P3/B7/8/8/2r5/Q7

#2

4 + 3

145 StrateGems 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qb8#
      • 1...Sxe6
        • 2.Qb7#
      • 1...Sc6
        • 2.Qb7#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Rxb2!
    • 1.Qg7?
      • threat
        • 2.Qd7#
      • 1...Sxe6
        • 2.Qb7#
      • 1...Rd2
        • 2.Qc7#
      • 1...Rc7
        • 2.Qxc7#
      • 1...Sf7!
    • 1.Qb1?
      • threat
        • 2.Qb8#
      • 1...Sxe6
        • 2.Qb7#
      • 1...Sc6
        • 2.Qb7#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Rb2!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qb8#
      • 1...Sxe6
        • 2.Qxe6#
      • 1...Rb2
        • 2.Qc7#
      • 1...Rc7
        • 2.Qxc7#
      • 1...Sc6
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(c);N_GUARD,XP(C)::QAB1(A)
        • S(c);N_GUARD::QAB1(A)
        • S(c);N_GUARD::QAB1(A),XS(c)
      • Refutation
        • R(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(c);N_GUARD,XP(C)::QAB1(A)
        • R(a);N_GUARD::QAR1(A)
        • R(a);N_GUARD::QAR1(A),XR(a)
      • Refutation
        • S(c);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(c);N_GUARD,XP(C)::QAB1(A)
        • S(c);N_GUARD::QAB1(A)
        • S(c);N_GUARD::QAB1(A),XS(c)
      • Refutation
        • R(a);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • S(c);OGATE,XP(C)::QAB(A),XS(c)
      • R(a);N_GUARD::QAR1(A)
      • R(a);N_GUARD::QAR1(A),XR(a)
      • S(c);S_CUTR(a)::QAR1(A)
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