MESON Chess Problem Database

Problem Display
PID: 218559 (6K1/3B4/N7/8/2kpp3/3R2Q1/8/3N4 w - - 0 1)

Foster, Benjamin R

St. Louis Globe Democrat, 1881

6K1/3B4/N7/8/2kpp3/3R2Q1/8/3N4

#2

6 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Se3#
  • Tries
    • 1.Kh7?
      • 1...Kd5
        • 2.Se3#
      • 1...exd3
        • 2.Qg8#
      • 1...e3!
    • 1.Kf8?
      • 1...Kd5
        • 2.Se3#
      • 1...exd3
        • 2.Qg8#
      • 1...e3!
    • 1.Kh8?
      • 1...Kd5
        • 2.Se3#
      • 1...exd3
        • 2.Qg8#
      • 1...e3!
    • 1.Rc3+?
      • 1...Kd5
        • 2.Sb4#
        • 2.Sc7#
        • 2.Rc5#
      • 1...dxc3!
    • 1.Qf2?
      • threat
        • 2.Qxd4#
      • 1...Kxd3
        • 2.Bb5#
      • 1...Kd5
        • 2.Qxd4#
      • 1...exd3
        • 2.Qa2#
        • 2.Qf7#
      • 1...e3!
    • 1.Qh2?
      • 1...Kxd3
        • 2.Bb5#
      • 1...Kd5
        • 2.Se3#
      • 1...exd3
        • 2.Qa2#
      • 1...e3!
    • 1.Qf4?
      • 1...Kd5
        • 2.Se3#
      • 1...exd3
        • 2.Qf7#
      • 1...e3
        • 2.Qxd4#
      • 1...Kxd3!
    • 1.Qe5?
      • threat
        • 2.Sb2#
        • 2.Bb5#
        • 2.Qxd4#
        • 2.Qb5#
      • 1...exd3
        • 2.Be6#
        • 2.Qb5#
        • 2.Qe6#
      • 1...Kxd3!
    • 1.Qd6?
      • threat
        • 2.Sb2#
        • 2.Qxd4#
      • 1...exd3
        • 2.Qe6#
      • 1...Kxd3!
    • 1.Qc7+?
      • 1...Kd5
        • 2.Sc3#
        • 2.Se3#
        • 2.Sb4#
        • 2.Qc5#
      • 1...Kxd3!
    • 1.Qb8?
      • threat
        • 2.Qb3#
        • 2.Qb5#
      • 1...Kd5
        • 2.Se3#
      • 1...exd3
        • 2.Be6#
        • 2.Qb5#
      • 1...Kxd3!
    • 1.Qg2?
      • 1...Kxd3
        • 2.Bb5#
      • 1...exd3
        • 2.Qa2#
      • 1...e3
        • 2.Sb2#
      • 1...Kd5!
    • 1.Qh3?
      • 1...Kd5
        • 2.Qe6#
      • 1...exd3
        • 2.Qe6#
      • 1...e3!
    • 1.Qg4?
      • 1...Kd5
        • 2.Qe6#
      • 1...exd3
        • 2.Qe6#
      • 1...e3
        • 2.Qxd4#
      • 1...Kxd3!
    • 1.Qg5?
      • threat
        • 2.Sb2#
        • 2.Bb5#
        • 2.Qb5#
      • 1...exd3
        • 2.Be6#
        • 2.Qb5#
      • 1...Kxd3!
    • 1.Qg7?
      • threat
        • 2.Qxd4#
      • 1...Kd5
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...exd3
        • 2.Qf7#
      • 1...Kxd3!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Kd5
        • 2.Qxd4#
      • 1...dxe3
        • 2.Sb2#
      • 1...exd3
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P_SPINP(b),S_FLIGHT::S(A)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::S(A)
        • P(c);SBLOCK,XR(B)::QAB(C)
      • Refutation
        • P(c);
    • Try
      • K(F);P-FLIGHT
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::S(A)
        • P(c);SBLOCK,XR(B)::QAB(C)
      • Refutation
        • P(c);
    • Try
      • K(F);P-FLIGHT
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::S(A)
        • P(c);SBLOCK,XR(B)::QAB(C)
      • Refutation
        • P(c);
    • Try
      • R(B);CHECK
      • Refutation
        • P(b);XR(B)
    • Try
      • Q(C);
      • Threat
        • QAR1(C),XP(b)
      • Vars
        • K(a);S_FLIGHT,XR(B)::B(E)
        • K(a);P_SPINP(b),S_FLIGHT::QAR1(C),XP(b)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT,XR(B)::B(E)
        • K(a);P_SPINP(b),S_FLIGHT::S(A)
        • P(c);SBLOCK,XR(B)::QAB(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::S(A)
        • P(c);P_SPINP(b),SBLOCK,XR(B)::QAB(C)
        • P(c);OGATE,P_SPINP(b)::QAR1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(C);
      • Threat
        • DUALS(4)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);SBLOCK,XR(B)::QAB(C)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT,XR(B)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::S(A)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT,XR(B)::B(E)
        • P(c);SBLOCK,XR(B)::QAB(C)
        • P(c);::S(A)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::QAB1(C)
        • P(c);SBLOCK,XR(B)::QAB(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::QAB1(C)
        • P(c);P_SPINP(b),SBLOCK,XR(B)::QAB(C)
        • P(c);OGATE,P_SPINP(b)::QAR1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(C);
      • Threat
        • QAR1(C),XP(b)
      • Vars
        • P(c);SBLOCK,XR(B)::QAB(C)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
  • Actual
    • Q(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P_SPINP(b),S_FLIGHT::QAR1(C),XP(b)
      • P(b);XQ(C)::S(A)
      • P(c);OGATE,SBLOCK,XR(B)::QAB(C)
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