MESON Chess Problem Database

Problem Display
PID: 230205 (4b3/5k2/2r3nK/1B1NB1R1/4Q3/8/8/8 w - - 0 1)

Anonymous

English Mechanic and World of Science, 1879

(First published on Fri Apr 25 1879)

4b3/5k2/2r3nK/1B1NB1R1/4Q3/8/8/8

#2

6 + 4

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qf5+?
      • 1...Kg8
        • 2.Se7#
      • 1...Rf6!
  • Keys
    • 1.Bd6!
      • threat
        • 2.Qxg6#
      • 1...Kg8
        • 2.Qxe8#
      • 1...Rxd6
        • 2.Qxe8#
      • 1...Sf4
        • 2.Rg7#
        • 2.Qf5#
        • 2.Qe7#
      • 1...Sh4
        • 2.Rg7#
        • 2.Qe7#
      • 1...Se5
        • 2.Qf5#
      • 1...Se7
        • 2.Qxe7#
      • 1...Sf8
        • 2.Rg7#
        • 2.Qf5#
        • 2.Qe7#
      • 1...Sh8
        • 2.Rg7#
        • 2.Qf5#
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P_SPINS(b),S_FLIGHT::S(C)
      • Refutation
        • R(a);P_SPINR(a)
  • Actual
    • B(D);
    • Threat
      • QAB1(A),XS(b)
    • Vars
      • K(c);P_SPINS(b),S_FLIGHT::QAR2(A),XB(d)
      • R(a);XB(D)::QAB1(A),XB(d)
      • S(b);P_PINB(D)::QAR2(A)
      • S(b);N_GUARD,P_PINB(D)::QAR1(A),XS(b)
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