MESON Chess Problem Database

Problem Display
PID: 144766 (4kb2/2n1P1p1/B3R1K1/8/8/8/8/4Q3 w - - 0 1)

Noack, Ludwig

New Orleans Times-Democrat, 1887

(First published on Sun May 1 1887)

4kb2/2n1P1p1/B3R1K1/8/8/8/8/4Q3

#2

5 + 4

14867 BCPS Library 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Bxb5#
    • 1...Sd5
      • 2.Bb5#
    • 1...Sa8
      • 2.Bb5#
  • Tries
    • 1.Qb4?
      • 1...Bxe7
        • 2.Qxe7#
      • 1...Sxa6
        • 2.Qa4#
        • 2.Qb5#
      • 1...Sxe6
        • 2.Bb5#
      • 1...Sb5
        • 2.Bxb5#
        • 2.Qxb5#
      • 1...Sd5
        • 2.Bb5#
        • 2.Qa4#
        • 2.Qb5#
      • 1...Sa8
        • 2.Bb5#
        • 2.Qa4#
        • 2.Qb5#
      • 1...Kd7!
    • 1.exf8Q+?
      • 1...Kd7
        • 2.Bc8#
        • 2.Rd6#
        • 2.Qd6#
        • 2.Qe7#
        • 2.Qc8#
      • 1...Kxf8!
    • 1.exf8R+?
      • 1...Kd7
        • 2.Bc8#
      • 1...Kxf8!
  • Keys
    • 1.Qh4!
      • 1...Kd7
        • 2.exf8S#
      • 1...Bxe7
        • 2.Qxe7#
      • 1...Sxa6
        • 2.Qa4#
      • 1...Sxe6
        • 2.Bb5#
      • 1...Sb5
        • 2.Bxb5#
      • 1...Sd5
        • 2.Bb5#
        • 2.Qa4#
      • 1...Sa8
        • 2.Bb5#
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::B(B),XS(a)
    • S(a);N_GUARD::B(B)
  • Tries
    • Try
      • Q(A);
      • Vars
        • B(d);OGATE,P_SPINB(d),XP(E)::QAR1(A),XB(d)
        • S(a);N_GUARD,XR(C)::B(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • P(E);CHECK,XB(d)
      • Refutation
        • K(c);P-FLIGHT,XQ(E)
    • Try
      • P(E);CHECK,XB(d)
      • Vars
        • K(c);S_FLIGHT::B(B)
      • Refutation
        • K(c);P-FLIGHT,XR(E)
  • Actual
    • Q(A);
    • Vars
      • K(c);S_FLIGHT::PXB(d)=S
      • B(d);OGATE,P_SPINB(d),XP(E)::QAR1(A),XB(d)
      • S(a);N_GUARD,XB(B)::QAB(A)
      • S(a);N_GUARD,XR(C)::B(B)
      • S(a);N_GUARD::B(B),XS(a)
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