MESON Chess Problem Database

Problem Display
PID: 10746 (7k/8/4qNKN/8/2p2p2/2Q5/8/B7 w - - 0 1)

Morse, Christopher Jeremy

The Problemist, 1967

7k/8/4qNKN/8/2p2p2/2Q5/8/B7

#2

5 + 4

273 Mat Plus 1994
133 The Problemist Supplement 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Sf7#
    • 1...Qg4+
      • 2.Sfxg4#
    • 1...Qd5
      • 2.Sxd5#
    • 1...Qd7
      • 2.Sxd7#
    • 1...Qf7+
      • 2.Sxf7#
    • 1...Qc8
      • 2.Se4#
      • 2.Sfg4#
      • 2.Sd5#
      • 2.Sh5#
      • 2.Sd7#
      • 2.Sh7#
      • 2.Se8#
      • 2.Sfg8#
      • 2.Sf7#
    • 1...Qg8+
      • 2.Sfxg8#
    • 1...Qe1
      • 2.Sf7#
    • 1...Qe2
      • 2.Se4#
      • 2.Sf7#
    • 1...Qe3
      • 2.Sf7#
    • 1...Qe4+
      • 2.Sxe4#
    • 1...Qe5
      • 2.Sf7#
    • 1...Qa6
      • 2.Sf7#
    • 1...Qb6
      • 2.Sf7#
    • 1...Qc6
      • 2.Sf7#
    • 1...Qd6
      • 2.Sf7#
    • 1...Qxf6+
      • 2.Qxf6#
    • 1...Qe8+
      • 2.Sxe8#
  • Keys
    • 1.Qh3!
      • threat
        • 2.Sg4#
        • 2.Sf5#
        • 2.Sf7#
      • 1...Qg4+
        • 2.Shxg4#
      • 1...Qf5+
        • 2.Sxf5#
      • 1...Qf7+
        • 2.Sxf7#
      • 1...Qg8+
        • 2.Shxg8#
      • 1...Qe4+
        • 2.Sf5#
      • 1...Qxf6+
        • 2.Bxf6#
      • 1...Qe8+
        • 2.Sf7#
      • 1...Qxh3
        • 2.Sf7#
      • 1...Qe7
        • 2.Sf7#
      • 1...Qd5
        • 2.Sf5#
        • 2.Sf7#
      • 1...Qd7
        • 2.Sf7#
      • 1...Qe1
        • 2.Sf7#
      • 1...Qe2
        • 2.Shg4#
        • 2.Sf7#
      • 1...Qe3
        • 2.Sf7#
      • 1...Qe5
        • 2.Sf5#
        • 2.Sf7#

This is after

After M. L. Adabashev.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 6
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(c);N_GUARD,N_PINS(C)::S(E)
    • Q(c);CHECK,N_PINS(C)::QAB(B)+S(C),XQ(c)
    • Q(c);N_PINS(C)::QAB(B)+S(C),XQ(c)
    • Q(c);CHECK,N_GUARD,N_PINS(C)::S(E),XQ(c)
    • Q(c);N_GUARD::S(E)
    • Q(c);CHECK,OGATE,P_SPINQ(c),XS(C)::QAB(B),XQ(c)
  • Actual
    • Q(B);
    • Threat
      • DUALS(3)
    • Vars
      • Q(c);CHECK,N_PINS(C)::QAR(B)+S(E),XQ(c)
      • Q(c);CHECK,N_PINS(C)::QAR(B)+S(E),DCHECK,XQ(c)
      • Q(c);CHECK,N_GUARD,N_PINS(C)::QAR(B)+S(E),XQ(c)
      • Q(c);CHECK,N_PINS(C)::QAR(B)+S(E)
      • Q(c);CHECK,OGATE,P_SPINQ(c),XS(C)::B(A),XQ(c)
      • Q(c);CHECK,N_PINS(C)::QAR(B)+S(E),DCHECK
      • Q(c);N_PINS(C),XQ(B)::S(E)
      • Q(c);N_PINS(C)::QAR(B)+S(E),DCHECK
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