MESON Chess Problem Database

Problem Display
PID: 195107 (1Q1q3B/R1P4R/1K2k3/5N1P/8/3P4/8/8 w - - 0 1)

Shinkman, William Anthony

Wurzburg, Otto

Densmore MT (Pittsburgh Gazette-Times), 1918

1Q1q3B/R1P4R/1K2k3/5N1P/8/3P4/8/8

#2

9 + 2

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Sd4+?
      • 1...Kd5
        • 2.Qxd8#
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Kd6
        • 2.Qxd8#
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Qxd4+!
    • 1.Qc8+?
      • 1...Kd5
        • 2.Ra5#
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Qd7
        • 2.Qxd7#
      • 1...Qxc8!
    • 1.cxd8S+?
      • 1...Kd5
        • 2.Se3#
        • 2.Se7#
        • 2.Ra5#
        • 2.Rad7#
        • 2.Rhd7#
        • 2.Qe5#
        • 2.Qd6#
        • 2.Qb7#
        • 2.Qa8#
      • 1...Kxf5!
    • 1.cxd8B?
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Qe5#
        • 2.Qd6#
      • 1...Kxf5!
  • Keys
    • 1.Sg7+!
      • 1...Kd5
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Ke5
        • 2.cxd8Q#
      • 1...Kd6
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Kf6
        • 2.cxd8Q#
        • 2.cxd8B#
      • 1...Kd7
        • 2.Qxd8#
        • 2.cxd8Q#
        • 2.cxd8S#
        • 2.cxd8B#
        • 2.cxd8R#
      • 1...Ke7
        • 2.cxd8Q#
      • 1...Kf7
        • 2.cxd8Q#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • Q(b);CHECK,N_PINP(F),XS(B)
    • Try
      • Q(H);CHECK
      • Vars
        • Q(b);N_GUARD,N_PINP(F),P_SPINQ(b)::QAB1(H),XQ(b)
      • Refutation
        • Q(b);N_PINP(F),XQ(H)
    • Try
      • P(F);CHECK,N_SPINP(F),XQ(b)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • P(F);N_SPINP(F),XQ(b)
      • Threat
        • QAR1(H)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
  • Actual
    • S(B);CHECK
    • Vars
      • K(a);S_FLIGHT::PXQ(b)=Q
      • K(a);P-FLIGHT::PXQ(b)=Q
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