MESON Chess Problem Database

Problem Display
PID: 4607 (3q2Bb/N4p2/3pp3/3kP3/R7/3P2QN/5B1K/3r4 w - - 0 1)

Bettmann, Edgar

Bettmann, Henry Wald

Croydon Guardian, 1883

3q2Bb/N4p2/3pp3/3kP3/R7/3P2QN/5B1K/3r4

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Ra5#
    • 1...Qa5
      • 2.Rxa5#
    • 1...Qg5
      • 2.Ra5#
    • 1...Qf6
      • 2.Ra5#
    • 1...Qe7
      • 2.Ra5#
    • 1...Qa8
      • 2.Ra5#
    • 1...Qf8
      • 2.Ra5#
    • 1...Qxg8
      • 2.Ra5#
  • Tries
    • 1.Qg5?
      • threat
        • 2.Sf4#
      • 1...Qxg5
        • 2.Ra5#
      • 1...dxe5
        • 2.Qxd8#
      • 1...f5
        • 2.exf5 ep#
      • 1...Qf6
        • 2.Ra5#
      • 1...Rh1+!
  • Keys
    • 1.Qf3+!
      • 1...Kxe5
        • 2.Sc6#
        • 2.Bg3#
        • 2.Bd4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • Q(f);N_GUARD,P_PINS(E)::R(F)
    • Q(f);N_GUARD::R(F),XQ(f)
    • Q(f);N_GUARD::R(F)
    • Q(f);N_GUARD,XB(I)::R(F)
  • Tries
    • Try
      • Q(D);
      • Threat
        • S(E)
      • Vars
        • Q(f);N_GUARD,XQ(D)::R(F)
        • P(c);OGATEB,P_SPINP(c),SBLOCK,XP(G)::QAR(D),XQ(f)
        • P(e);OGATE,P_SPINP(d)::QAR(D)+P(G),XP(e),EP
        • Q(f);N_GUARD::R(F)
      • Refutation
        • R(a);CHECK
  • Actual
    • Q(D);CHECK
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Developed and maintained by Brian Stephenson.
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