MESON Chess Problem Database

Problem Display
PID: 2748 (8/N2b2B1/1P5Q/2pk2K1/N7/3p4/n2P4/4R3 w - - 0 1)

Thursby, John Ormerod Scarlett

English Mechanic and World of Science, 1878

(First published on Fri Jan 25 1878)

8/N2b2B1/1P5Q/2pk2K1/N7/3p4/n2P4/4R3

#2

8 + 5

3357 75 Chess Problems 1883
15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxa4
      • 2.Qe6#
    • 1...Bb5
      • 2.Qe6#
    • 1...Bc6
      • 2.Qe6#
    • 1...Be6
      • 2.Qxe6#
    • 1...Be8
      • 2.Qe6#
  • Tries
    • 1.Qh1+?
      • 1...Kd6
        • 2.Bf8#
      • 1...Kc4!
  • Keys
    • 1.Re4!
      • 1...Kxe4
        • 2.Qh1#
      • 1...Bxa4
        • 2.Qe6#
      • 1...Be6
        • 2.Qxe6#
      • 1...Bh3
        • 2.Qc6#
      • 1...Bg4
        • 2.Qc6#
      • 1...Bb5
        • 2.Qe6#
      • 1...Bf5
        • 2.Qc6#
      • 1...Bc6
        • 2.Qxc6#
        • 2.Qe6#
      • 1...Bc8
        • 2.Qc6#
      • 1...Be8
        • 2.Qe6#
      • 1...Sc1
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Sb4
        • 2.Sc3#
      • 1...c4
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • B(e);N_GUARD,XS(C)::QAB1(F)
    • B(e);N_GUARD::QAB1(F)
    • B(e);N_GUARD::QAB1(F),XB(e)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);P-FLIGHT::B(H)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • R(A);
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(A)::QAB(F)
      • B(e);N_GUARD,XS(C)::QAB1(F)
      • B(e);N_GUARD::QAB1(F),XB(e)
      • B(e);N_GUARD::QAB1(F)
      • S(a);N_GUARD::S(C)
      • S(a);N_GUARD::S(C),XS(a)
      • P(c);N_GUARD::R1(A)
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