MESON Chess Problem Database

Problem Display
PID: 134916 (k6q/2K5/N1N5/3B4/6Q1/8/8/8 w - - 0 1)

Lipton, Michael

The Problemist, 2009

k6q/2K5/N1N5/3B4/6Q1/8/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Qc8#
      • 2.Qg8#
    • 1...Qc3
      • 2.Qc8#
      • 2.Qg8#
    • 1...Qd4
      • 2.Qc8#
      • 2.Qg8#
    • 1...Qf6
      • 2.Qc8#
    • 1...Qh1
      • 2.Qc8#
      • 2.Qg8#
    • 1...Qh4
      • 2.Qc8#
    • 1...Qh5
      • 2.Qc8#
    • 1...Qh6
      • 2.Qc8#
    • 1...Qc8+
      • 2.Qxc8#
    • 1...Qg8
      • 2.Qxg8#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Scb4#
        • 2.Sa5#
        • 2.Se5#
        • 2.Sa7#
        • 2.Se7#
        • 2.Scb8#
        • 2.Sd8#
        • 2.Qa7#
      • 1...Qe5+
        • 2.Sxe5#
      • 1...Qg7+
        • 2.Se7#
      • 1...Qh2+
        • 2.Se5#
      • 1...Qh7+
        • 2.Se7#
      • 1...Qb8+
        • 2.Scxb8#
      • 1...Qd8+
        • 2.Sxd8#
      • 1...Qb2
        • 2.Scb4#
        • 2.Qa7#
      • 1...Qc3
        • 2.Qa7#
        • 2.Qg8#
      • 1...Qd4
        • 2.Qg8#
      • 1...Qf6
        • 2.Qa7#
      • 1...Qh1
        • 2.Qa7#
        • 2.Qg8#
      • 1...Qh5
        • 2.Se5#
        • 2.Qa7#
      • 1...Qh6
        • 2.Qa7#
      • 1...Qe8
        • 2.Qa7#
      • 1...Qg8
        • 2.Qa7#
        • 2.Qxg8#
      • 1...Qc8+!
  • Keys
    • 1.Kb6!
      • threat
        • 2.Sc7#
        • 2.Scb4#
        • 2.Sd4#
        • 2.Sa5#
        • 2.Se5#
        • 2.Sa7#
        • 2.Se7#
        • 2.Scb8#
        • 2.Sd8#
      • 1...Qb2+
        • 2.Scb4#
      • 1...Qd4+
        • 2.Sxd4#
      • 1...Qb8+
        • 2.Scxb8#
      • 1...Qd8+
        • 2.Sxd8#
      • 1...Qc3
        • 2.Sc7#
        • 2.Qc8#
        • 2.Qg8#
      • 1...Qe5
        • 2.Sxe5#
      • 1...Qf6
        • 2.Sc7#
        • 2.Qc8#
      • 1...Qg7
        • 2.Se7#
        • 2.Qc8#
      • 1...Qh1
        • 2.Sc7#
        • 2.Qc8#
        • 2.Qg8#
      • 1...Qh2
        • 2.Scb4#
        • 2.Sd4#
        • 2.Sa5#
        • 2.Se5#
        • 2.Sa7#
        • 2.Se7#
        • 2.Scb8#
        • 2.Sd8#
      • 1...Qh5
        • 2.Sc7#
        • 2.Se5#
        • 2.Qc8#
      • 1...Qh6
        • 2.Sc7#
        • 2.Qc8#
      • 1...Qh7
        • 2.Se7#
        • 2.Qc8#
      • 1...Qc8
        • 2.Qxc8#
      • 1...Qe8
        • 2.Sc7#
      • 1...Qg8
        • 2.Sc7#
        • 2.Qxg8#

This is after 134914

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • Q(b);N_GUARD::QAR2(A)
    • Q(b);N_GUARD,SBLOCK::QAR2(A)
    • Q(b);CHECK,N_GUARD::QAR2(A),XQ(b)
    • Q(b);N_GUARD::QAR(A),XQ(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(8)
      • Vars
        • Q(b);CHECK::B(B)+S(D),XQ(b)
        • Q(b);CHECK::B(B)+S(D)
        • Q(b);CHECK,SBLOCK::B(B)+S(D)
        • Q(b);N_GUARD::QAR(A)
        • Q(b);::QAR1(A)
        • Q(b);SBLOCK::QAR1(A)
      • Refutation
        • Q(b);CHECK
  • Actual
    • K(E);S_FLIGHT
    • Threat
      • DUALS(9)
    • Vars
      • Q(b);CHECK::B(B)+S(D)
      • Q(b);CHECK::B(B)+S(D),XQ(b)
      • Q(b);::B(B)+S(D),XQ(b)
      • Q(b);N_GUARD::QAR2(A),XQ(b)
      • Q(b);::S(C)
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