MESON Chess Problem Database

Problem Display
PID: 271051 (b7/2B1p3/1Nn1k1P1/4ppK1/Q4P2/1n6/3r1pP1/b2r4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schakend Nederland, 1984

b7/2B1p3/1Nn1k1P1/4ppK1/Q4P2/1n6/3r1pP1/b2r4

#2

7 + 11

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Qxb3#
      • 2.Qc4#
    • 1...Sbd4
      • 2.Qc4#
    • 1...Scd4
      • 2.Qd7#
  • Tries
    • 1.g4?
      • threat
        • 2.gxf5#
      • 1...fxg4
        • 2.f5#
      • 1...Sbd4
        • 2.Qc4#
      • 1...Scd4
        • 2.Qd7#
      • 1...Rg1!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qxf5#
      • 1...fxe4
        • 2.f5#
      • 1...Sbd4
        • 2.Qd5#
      • 1...Scd4
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(e);S_CUTR(c)::QAB(B)
    • S(h);OGATE::QAB1(B)
  • Tries
    • Try
      • P(A);
      • Threat
        • P(A),XP(g)
      • Vars
        • P(g);OGATE,XP(A)::P(C)
        • S(e);S_CUTR(c)::QAB(B)
        • S(h);OGATE::QAB1(B)
      • Refutation
        • R(b);P_PINP(A)
  • Actual
    • Q(B);P_PINP(f)
    • Threat
      • QAB1(B),XP(g)
    • Vars
      • P(g);N_SPINP(f),OGATE,XQ(B)::P(C)
      • S(e);S_CUTR(c)::QAB1(B)
      • S(h);N_GUARD,S_CUTB(a)::QAR1(B),XP(f)
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