MESON Chess Problem Database

Problem Display
PID: 250956 (3nQ3/N7/3np2B/2Nk4/3p1P2/3P4/1K2B3/8 w - - 0 1)

Anonymous

English Mechanic and World of Science, 1887

(First published on Mon Jan 24 1887)

3nQ3/N7/3np2B/2Nk4/3p1P2/3P4/1K2B3/8

#2

8 + 5

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sb7
      • 2.Qc6#
    • 1...Sf7
      • 2.Qc6#
    • 1...e5
      • 2.Qxe5#
  • Tries
    • 1.Qh5+?
      • 1...e5
        • 2.Qxe5#
      • 1...Sf5!
  • Keys
    • 1.Bf8!
      • 1...Sc4+
        • 2.dxc4#
      • 1...Kxc5
        • 2.Qb5#
      • 1...Sxe8
        • 2.Bf3#
      • 1...Se4
        • 2.dxe4#
      • 1...Sb5
        • 2.Bf3#
      • 1...Sf5
        • 2.Bf3#
      • 1...S6b7
        • 2.Bf3#
      • 1...S6f7
        • 2.Bf3#
      • 1...Sc8
        • 2.Bf3#
      • 1...Sc6
        • 2.Qxc6#
      • 1...S8b7
        • 2.Qc6#
      • 1...S8f7
        • 2.Qc6#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::QAB1(H),XS(e)
    • S(e);N_GUARD::QAB1(H)
    • P(d);OGATE::QAR1(H),XP(d)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • P(d);P_SPINP(d)::QAR1(H),XP(d)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • B(F);
    • Vars
      • S(c);CHECK,OGATE::P(C),XS(c)
      • K(b);OGATEB,P-FLIGHT,P_SPINS(c),XS(E)::QAR1(H)
      • S(c);N_GUARD,XQ(H)::B(B)
      • S(c);OGATE::P(C),XS(c)
      • S(c);N_GUARD::B(B)
      • S(e);N_GUARD::QAB1(H),XS(e)
      • S(e);N_GUARD::QAB1(H)
      • P(d);OGATE::QAR1(H),XP(d)
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