MESON Chess Problem Database

Problem Display
PID: 135584 (k6q/3P4/N1N5/1K1B4/8/8/8/8 w - - 0 1)

Burger, Robert Eugene

The Problemist, 2009

k6q/3P4/N1N5/1K1B4/8/8/8/8

#2

5 + 2

5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc8
      • 2.dxc8Q#
  • Tries
    • 1.d8Q+?
      • 1...Kb7
        • 2.Sc5#
      • 1...Qxd8!
  • 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.d8Q#
        • 2.d8R#
      • 1...Qe5
        • 2.Sxe5#
      • 1...Qf6
        • 2.Sc7#
      • 1...Qh1
        • 2.Sc7#
        • 2.d8Q#
        • 2.d8R#
      • 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.d8Q#
        • 2.d8R#
      • 1...Qh6
        • 2.Sc7#
        • 2.d8Q#
        • 2.d8R#
      • 1...Qc8
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Qg8
        • 2.Sc7#

Anticipated by 134915(2009)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • Q(b);OGATE::PXQ(b)=Q
  • Tries
    • Try
      • P(E);CHECK
      • Vars
        • K(a);S_FLIGHT::S(C)
      • Refutation
        • Q(b);XQ(E)
  • Actual
    • K(A);P-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);P_PINS(D)::S(C)
      • Q(b);OGATE::PXQ(b)=Q
      • Q(b);::S(C)
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