MESON Chess Problem Database

Problem Display
PID: 242965 (8/8/N2p2N1/3k4/8/2Kn3B/2Q2p2/8 w - - 0 1)

Blake, Percy Francis

Bradford Weekly Telegraph, 1905

(First published on Sat Feb 18 1905)

8/8/N2p2N1/3k4/8/2Kn3B/2Q2p2/8

#2

5 + 4

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qxd3#
    • 1...Sc5
      • 2.Sb4#
    • 1...Se5
      • 2.Se7#
    • 1...f1S
      • 2.Qg2#
  • Tries
    • 1.Qb3+?
      • 1...Kc6
        • 2.Se7#
      • 1...Ke4!
    • 1.Qe2?
      • threat
        • 2.Se7#
        • 2.Bg2#
        • 2.Qf3#
      • 1...f1Q
        • 2.Se7#
      • 1...f1B
        • 2.Se7#
        • 2.Qf3#
      • 1...f1R
        • 2.Se7#
      • 1...Se1
        • 2.Se7#
        • 2.Qc4#
      • 1...Sf4
        • 2.Se7#
        • 2.Qf3#
        • 2.Qc4#
      • 1...Sc5
        • 2.Sb4#
        • 2.Se7#
      • 1...Se5
        • 2.Se7#
      • 1...Kc6!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qh1#
        • 2.Qb7#
      • 1...Ke4
        • 2.Qxd3#
      • 1...Kc6
        • 2.Se7#
      • 1...f1Q
        • 2.Qb7#
      • 1...f1S
        • 2.Qb7#
      • 1...f1B
        • 2.Qb7#
      • 1...f1R
        • 2.Qb7#
      • 1...Sc1
        • 2.Qb7#
      • 1...Se1
        • 2.Qb7#
      • 1...Sb2
        • 2.Qh1#
      • 1...Sb4
        • 2.Qh1#
      • 1...Sf4
        • 2.Qb7#
      • 1...Sc5
        • 2.Sb4#
      • 1...Se5
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • K(c);P_SPINS(b),S_FLIGHT::QAB1(A),XS(b)
    • S(b);N_GUARD,SBLOCK::S(D)
    • S(b);SBLOCK::S(E)
    • P(a);OGATE::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::S(E)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(a);::S(E)
        • S(b);::S(E)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);P_SPINS(b),S_FLIGHT::QAB1(A),XS(b)
      • K(c);S_FLIGHT::S(E)
      • P(a);::QAB(A)
      • S(b);::QAB(A)
      • S(b);N_GUARD,SBLOCK::S(D)
      • S(b);SBLOCK::S(E)
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