MESON Chess Problem Database

Problem Display
PID: 23195 (8/8/8/8/QK6/B7/3n4/rkN5 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/8/8/8/QK6/B7/3n4/rkN5

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Qb3#
    • 1...Sb3
      • 2.Qxb3#
    • 1...Sf3
      • 2.Qb3#
    • 1...Se4
      • 2.Qb3#
  • Tries
    • 1.Se2?
      • threat
        • 2.Sc3#
      • 1...Ka2
        • 2.Sc3#
        • 2.Qc2#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Ra2
        • 2.Qd1#
      • 1...Se4
        • 2.Qb3#
      • 1...Rxa3!
    • 1.Qd1?
      • 1...Ra2
        • 2.Se2#
        • 2.Sb3#
        • 2.Sd3#
      • 1...Sf1
        • 2.Qb3#
        • 2.Qd3#
      • 1...Sb3
        • 2.Qxb3#
        • 2.Qd3#
      • 1...Sf3
        • 2.Qb3#
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Se4
        • 2.Qb3#
        • 2.Qd3#
      • 1...Rxa3!
  • Keys
    • 1.Sa2!
      • threat
        • 2.Sc3#
      • 1...Kxa2
        • 2.Qc2#
      • 1...Rxa2
        • 2.Qd1#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Se4
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(c);N_GUARD::QAR2(C)
    • S(c);N_GUARD::QAR2(C),XS(c)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • S(c);N_GUARD::QAR2(C),XS(c)
        • R(a);SBLOCK::QAR2(C)
        • S(c);N_GUARD::QAR2(C)
      • Refutation
        • R(a);XB(B)
    • Try
      • Q(C);
      • Vars
        • S(c);OGATE::QAB(C)
      • Refutation
        • R(a);XB(B)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • K(b);S_FLIGHT,XS(A)::QAR2(C)
      • R(a);SBLOCK,XS(A)::QAR2(C)
      • S(c);N_GUARD::QAR2(C),XS(c)
      • S(c);N_GUARD::QAR2(C)
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