MESON Chess Problem Database

Problem Display
PID: 214740 (7B/Q7/n4pK1/8/4Bk2/5P2/8/3N3R w - - 0 1)

Shinkman, William Anthony

Detroit Free Press, 1877

7B/Q7/n4pK1/8/4Bk2/5P2/8/3N3R

#2

7 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Qb8#
      • 2.Qc7#
    • 1...Sc5
      • 2.Qb8#
      • 2.Qc7#
    • 1...Sc7
      • 2.Qxc7#
    • 1...Sb8
      • 2.Qxb8#
      • 2.Qc7#
  • Tries
    • 1.Kxf6?
      • 1...Sb4
        • 2.Qb8#
        • 2.Qc7#
      • 1...Sc5
        • 2.Qb8#
        • 2.Qc7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sb8
        • 2.Qxb8#
        • 2.Qc7#
      • 1...Kg3!
    • 1.Bxf6?
      • 1...Sb4
        • 2.Qb8#
        • 2.Qc7#
      • 1...Sc5
        • 2.Qb8#
        • 2.Qc7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sb8
        • 2.Qxb8#
        • 2.Qc7#
      • 1...Kg3!
    • 1.Rg1?
      • 1...Sb4
        • 2.Qb8#
        • 2.Qc7#
      • 1...Sc5
        • 2.Qb8#
        • 2.Qc7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sb8
        • 2.Qxb8#
        • 2.Qc7#
      • 1...f5
        • 2.Qe3#
      • 1...Ke5!
    • 1.Rh3?
      • 1...Sb4
        • 2.Qb8#
        • 2.Qc7#
      • 1...Sc5
        • 2.Qb8#
        • 2.Qc7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sb8
        • 2.Qxb8#
        • 2.Qc7#
      • 1...f5
        • 2.Qe3#
      • 1...Ke5!
    • 1.Rh4+?
      • 1...Kg3
        • 2.Qf2#
      • 1...Ke5!
    • 1.Qb6?
      • threat
        • 2.Qd6#
      • 1...Ke5
        • 2.Qxf6#
      • 1...Kg3!
    • 1.Qb8+?
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sxb8!
    • 1.Qxa6?
      • threat
        • 2.Qd6#
      • 1...Ke5
        • 2.Qxf6#
      • 1...Kg3!
    • 1.Qd7?
      • threat
        • 2.Qd6#
      • 1...Kg3
        • 2.Qg4#
      • 1...Ke5!
    • 1.Qh7?
      • threat
        • 2.Qh2#
      • 1...Kg3
        • 2.Qh2#
      • 1...Ke5!
  • Keys
    • 1.Qg7!
      • 1...Kg3
        • 2.Kf5#
      • 1...Ke5
        • 2.Qxf6#
      • 1...f5
        • 2.Qe5#
      • 1...Sb4
        • 2.Qc7#
      • 1...Sc5
        • 2.Qc7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sb8
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAB(F),XS(b)
  • Tries
    • Try
      • K(E);P-FLIGHT,XP(c)
      • Vars
        • S(b);N_GUARD::QAB(F),XS(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(G);XP(c)
      • Vars
        • S(b);N_GUARD::QAB(F),XS(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);
      • Vars
        • S(b);N_GUARD::QAB(F),XS(b)
        • P(c);::QAB1(F)
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT
    • Try
      • R(B);
      • Vars
        • S(b);N_GUARD::QAB(F),XS(b)
        • P(c);::QAB1(F)
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB(F)
      • Vars
        • K(a);P_SPINP(c),S_FLIGHT::QAB1(F),XP(c)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB(F),XS(b)
      • Refutation
        • S(b);XQ(F)
    • Try
      • Q(F);XS(b)
      • Threat
        • QAB(F)
      • Vars
        • K(a);P_SPINP(c),S_FLIGHT::QAB1(F),XP(c)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB(F)
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB(F)
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(a);S_FLIGHT::QAR(F)+K(E)
      • K(a);P_SPINP(c),S_FLIGHT::QAB1(F),XP(c)
      • P(c);OGATE::QAB1(F)
      • S(b);N_GUARD::QAB(F)
      • S(b);N_GUARD::QAB(F),XS(b)
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