MESON Chess Problem Database

Problem Display
PID: 254654 (2B5/3p4/5Bp1/N2k1p2/4N3/3P3Q/6K1/8 w - - 0 1)

Anonymous

English Mechanic and World of Science, 1889

(First published on Fri Feb 15 1889)

2B5/3p4/5Bp1/N2k1p2/4N3/3P3Q/6K1/8

#2

7 + 4

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...f4
      • 2.Bb7#
      • 2.Qxd7#
    • 1...g5
      • 2.Qxf5#
  • Tries
    • 1.Bxd7?
      • 1...f4
        • 2.Bc6#
        • 2.Be6#
        • 2.Qe6#
      • 1...g5
        • 2.Qxf5#
      • 1...fxe4!
    • 1.Qh7?
      • threat
        • 2.Qg8#
        • 2.Qxd7#
        • 2.Qf7#
      • 1...Ke6
        • 2.Qg8#
        • 2.Qxd7#
      • 1...d6
        • 2.Qg8#
        • 2.Qb7#
        • 2.Qf7#
      • 1...fxe4!
    • 1.Qh8?
      • threat
        • 2.Qg8#
      • 1...Ke6
        • 2.Qg8#
      • 1...fxe4!
  • Keys
    • 1.d4!
      • 1...Kxe4
        • 2.Qf3#
      • 1...Ke6
        • 2.Qb3#
      • 1...fxe4
        • 2.Qxd7#
      • 1...f4
        • 2.Bb7#
      • 1...g5
        • 2.Qxf5#
      • 1...d6
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::QAR2(C),XP(b)
  • Tries
    • Try
      • B(G);XP(d)
      • Vars
        • P(c);N_GUARD::QAR2(C),XP(b)
      • Refutation
        • P(b);XS(D)
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Refutation
        • P(b);XS(D)
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • K(a);P_SPINP(d),S_FLIGHT::QAB(C)
      • Refutation
        • P(b);XS(D)
  • Actual
    • P(B);
    • Vars
      • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(C)
      • K(a);N_GUARD,P_SPINP(b),S_FLIGHT::QAB(C)
      • P(b);OGATE,SBLOCK,XS(D)::QAR2(C),XP(d)
      • P(b);::B(G)
      • P(c);N_GUARD::QAR2(C),XP(b)
      • P(d);SBLOCK::S(D)
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