MESON Chess Problem Database

Problem Display
PID: 4749 (3n4/1n2p3/N3R2Q/3k4/B7/1pP5/bK6/8 w - - 0 1)

Bull, Cecil Alfred Lucas

3rd HM., Columbia Chess Chronicle, 1890

3n4/1n2p3/N3R2Q/3k4/B7/1pP5/bK6/8

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Bxb3#
  • Tries
    • 1.Re5+?
      • 1...Kc4
        • 2.Bb5#
      • 1...Kxe5!
    • 1.Qd2+?
      • 1...Kc4
        • 2.Re4#
        • 2.Qd4#
      • 1...Kxe6!
    • 1.Qg5+?
      • 1...Kc4
        • 2.Bb5#
        • 2.Qb5#
      • 1...Kxe6!
    • 1.Qh1+?
      • 1...Kc4
        • 2.Qe4#
      • 1...Kxe6!
    • 1.Qh5+?
      • 1...Kc4
        • 2.Bb5#
        • 2.Qb5#
      • 1...Kxe6!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qe4#
      • 1...Kxe6
        • 2.Sc7#
      • 1...Sxe6
        • 2.c4#
      • 1...Bb1
        • 2.Bxb3#
      • 1...Sc5
        • 2.Sc7#
      • 1...Sd6
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::B(C),XP(b)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(c);S_FLIGHT::B(C)
      • Refutation
        • K(c);P-FLIGHT,XR(E)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(c);S_FLIGHT,XR(E)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(c);S_FLIGHT,XR(E)
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(F)
      • Refutation
        • K(c);S_FLIGHT,XR(E)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(c);S_FLIGHT,XR(E)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • K(c);S_FLIGHT,XR(E)::S(D)
      • S(f);SBLOCK,XR(E)::P(B)
      • B(a);N_GUARD::B(C),XP(b)
      • S(d);SBLOCK::S(D)
      • S(d);SBLOCK::R1(E)
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