MESON Chess Problem Database

Problem Display
PID: 210347 (1b2R3/1p5B/1B2bp2/K1Q2r2/4krn1/3Npn2/4P3/8 w - - 0 1)

Funk, Jacob E

The Observer, 1920

(First published on Sun Oct 17 1920)

1b2R3/1p5B/1B2bp2/K1Q2r2/4krn1/3Npn2/4P3/8

#2

7 + 10

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sfe5
      • 2.Qd4#
  • Keys
    • 1.Sb4!
      • threat
        • 2.Qd5#
      • 1...Be5
        • 2.Qc2#
      • 1...Sfe5
        • 2.Qd4#
      • 1...Sge5
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);N_PINQ(D),N_SPINB(g)::QAR1(D)
  • Actual
    • S(B);
    • Threat
      • QAB1(D)
    • Vars
      • B(j);N_PINQ(D),N_SPINB(g),SBLOCK::QAB(D)
      • S(b);N_PINQ(D),N_SPINB(g)::QAR1(D)
      • S(e);N_PINQ(D),N_SPINB(g),SBLOCK::QAR1(D),XP(a)
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