MESON Chess Problem Database

Problem Display
PID: 136715 (QK4R1/5B1n/1p1R4/4pk2/8/4r3/4N3/8 w - - 0 1)

Langstaff, William A

The Field, 1921

(First published on Sat Jun 18 1921)

QK4R1/5B1n/1p1R4/4pk2/8/4r3/4N3/8

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Qf3#
    • 1...Rf3
      • 2.Qxf3#
    • 1...Sf6
      • 2.Be6#
    • 1...e4
      • 2.Qd5#
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qg4#
      • 1...e4
        • 2.Qb5#
      • 1...Rg3
        • 2.Sxg3#
      • 1...Re4
        • 2.Qd7#
      • 1...Sg5
        • 2.Bg6#
      • 1...Sf6
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD,XS(A)::QAR2(D)
    • R(a);N_GUARD::QAR2(D),XR(a)
    • S(e);SBLOCK::B(C)
    • P(b);OGATEB::QAR2(D)
  • Actual
    • Q(D);
    • Threat
      • QAB1(D)
    • Vars
      • P(b);OGATEB,SBLOCK::QAR(D)
      • R(a);N_GUARD::S(A),XR(a)
      • R(a);SBLOCK::QAB(D)
      • S(e);SBLOCK::B(C)
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