MESON Chess Problem Database

Problem Display
PID: 234194 (8/1K1N4/1pNpp3/3k1n2/R1p1p1Q1/8/1q1P4/4n3 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Stern, 1991

8/1K1N4/1pNpp3/3k1n2/R1p1p1Q1/8/1q1P4/4n3

#2

6 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sb4#
    • 1...Sd4
      • 2.Se7#
    • 1...c3
      • 2.Qxe4#
    • 1...e3
      • 2.Qxc4#
    • 1...e5
      • 2.Qg8#
  • Keys
    • 1.d4!
      • threat
        • 2.Sf6#
      • 1...Qxd4
        • 2.Sb4#
      • 1...Sxd4
        • 2.Se7#
      • 1...cxd4 ep
        • 2.Qxe4#
      • 1...exd4 ep
        • 2.Qxc4#
      • 1...e5
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_GUARD,SBLOCK::S(D)
    • S(f);N_GUARD,SBLOCK::S(D)
    • P(c);::QAB1(C),XP(d)
    • P(d);OGATE::QAB1(C),XP(c)
    • P(i);OGATEB::QAB(C)
  • Actual
    • P(A);
    • Threat
      • S(F)
    • Vars
      • Q(b);N_GUARD,SBLOCK,XP(A)::S(D)
      • S(f);N_GUARD,SBLOCK,XP(A)::S(D)
      • P(c);EP,XP(A)::QAB1(C),XP(d)
      • P(d);EP,OGATE,XP(A)::QAB1(C),XP(c)
      • P(i);OGATEB::QAB(C)
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