MESON Chess Problem Database

Problem Display
PID: 250955 (B1nB4/3pnN2/Q7/2kp4/1p6/4P3/8/7K w - - 0 1)

Legge, Robin H

The Field, 1906

(First published on Sat Jul 21 1906)

B1nB4/3pnN2/Q7/2kp4/1p6/4P3/8/7K

#2

6 + 6

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Bxb6#
    • 1...Sd6
      • 2.Bb6#
    • 1...Sa7
      • 2.Bb6#
  • Tries
    • 1.Se5?
      • threat
        • 2.Sd3#
        • 2.Sxd7#
      • 1...Sb6
        • 2.Qxb6#
      • 1...b3
        • 2.Sd3#
      • 1...d6
        • 2.Sd3#
        • 2.Sd7#
        • 2.Qa5#
      • 1...Sc6!
    • 1.Bxe7+?
      • 1...Sd6
        • 2.Bxd6#
      • 1...d6
        • 2.Qc6#
      • 1...Sxe7!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sb7#
      • 1...Sxd6
        • 2.Bb6#
      • 1...Sb6
        • 2.Qxb6#
      • 1...b3
        • 2.Qa3#
      • 1...d4
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(f);N_GUARD::B(F),XS(f)
    • S(f);N_GUARD::B(F)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);N_GUARD::QAB1(C),XS(f)
        • P(a);::S(D)
      • Refutation
        • S(e);
    • Try
      • B(F);CHECK,XS(e)
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::B(F),XS(f)
        • P(d);P_SPINP(d)::QAR1(C)
      • Refutation
        • S(f);XB(F)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • S(f);N_GUARD,SBLOCK,XS(D)::B(F)
      • S(f);N_GUARD::QAB1(C),XS(f)
      • P(a);OGATEB::QAB(C)
      • P(c);N_GUARD::S(D)
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