MESON Chess Problem Database

Problem Display
PID: 43801 (6Q1/7B/4pp2/2K1kq2/8/5p2/1N3P2/B7 w - - 0 1)

Clark, DW

The Westminster Papers, 1876

6Q1/7B/4pp2/2K1kq2/8/5p2/1N3P2/B7

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Sd3#
      • 2.Qg3#
      • 2.Qb8#
    • 1...Qd3
      • 2.Sxd3#
      • 2.Qg3#
    • 1...Qh3
      • 2.Sd3#
      • 2.Qb8#
    • 1...Qe4
      • 2.Sd3#
      • 2.Qb8#
    • 1...Qg4
      • 2.Sd3#
      • 2.Qb8#
    • 1...Qf4
      • 2.Sd3#
      • 2.Sc4#
      • 2.Qb8#
    • 1...Qg5
      • 2.Sd3#
      • 2.Qb8#
    • 1...Qh5
      • 2.Sd3#
      • 2.Qg3#
      • 2.Qb8#
  • Tries
    • 1.Qxe6+?
      • 1...Kf4+
        • 2.Qxf5#
      • 1...Qxe6
        • 2.Sd3#
      • 1...Kxe6+!
    • 1.Qg3+?
      • 1...Qf4
        • 2.Sd1#
        • 2.Sd3#
        • 2.Sa4#
        • 2.Sc4#
      • 1...Ke4+!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Sd1#
        • 2.Sd3#
        • 2.Sa4#
        • 2.Sc4#
        • 2.Qd4#
      • 1...Qc2+
        • 2.Sc4#
      • 1...Qxg4
        • 2.Sd3#
      • 1...Qxh7
        • 2.Sd1#
        • 2.Sd3#
        • 2.Sa4#
        • 2.Sc4#
      • 1...Qb1
        • 2.Sd3#
        • 2.Sc4#
        • 2.Qg3#
        • 2.Qd4#
      • 1...Qd3
        • 2.Sxd3#
        • 2.Sc4#
        • 2.Qg3#
      • 1...Qe4
        • 2.Sd3#
        • 2.Sc4#
        • 2.Qxe4#
      • 1...Qg6
        • 2.Sd1#
        • 2.Sd3#
        • 2.Sa4#
        • 2.Sc4#
      • 1...Qf4
        • 2.Sd3#
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);CHECK,XP(d)
      • Vars
        • K(b);CHECK,S_FLIGHT::QAR1(F),XQ(c)
        • Q(c);SBLOCK,XQ(F)::B(A)+S(B),DCHECK
      • Refutation
        • K(b);CHECK,P-FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(b);CHECK,P-FLIGHT,P_SPINQ(c)
  • Actual
    • Q(F);
    • Threat
      • DUALS(5)
    • Vars
      • Q(c);CHECK::B(A)+S(B),DCHECK
      • Q(c);XQ(F)::B(A)+S(B),DCHECK
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