MESON Chess Problem Database

Problem Display
PID: 58642 (5bB1/1Qnp4/4r3/5N2/K1kP4/p7/qpPP4/8 w - - 0 1)

Servais, Albert

Comm., Democratie Nouvelle, 1953

5bB1/1Qnp4/4r3/5N2/K1kP4/p7/qpPP4/8

#2

7 + 8

785 Het Belgisch Schaakbord (L'Echiquier Belge) 1955

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qb3#
    • 1...Qb3+
      • 2.Qxb3#
    • 1...Qa1
      • 2.Qb3#
    • 1...Sb5
      • 2.Qxb5#
    • 1...Sd5
      • 2.Qb5#
    • 1...Sa6
      • 2.Qb5#
    • 1...Sa8
      • 2.Qb5#
    • 1...Se8
      • 2.Qb5#
    • 1...d6
      • 2.Qc6#
  • Tries
    • 1.Qc6+?
      • 1...Bc5
        • 2.Qxc5#
      • 1...dxc6!
    • 1.Qxc7+?
      • 1...Bc5
        • 2.Qxc5#
      • 1...Kd5!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Se3#
      • 1...Qb3+
        • 2.cxb3#
      • 1...Bh6
        • 2.Sd6#
      • 1...Sd5
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::QAB1(F)
    • Q(a);CHECK,N_GUARD::QAB1(F),XQ(a)
    • S(f);N_GUARD::QAB1(F),XS(f)
    • S(f);N_GUARD,N_SPINR(e)::QAB1(F)
    • S(f);N_GUARD::QAB1(F)
    • P(g);N_GUARD,S_CUTB(h)::QAR2(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::QAR1(F),XB(h)
      • Refutation
        • P(g);XQ(F)
    • Try
      • Q(F);CHECK,XS(f)
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::QAR1(F),XB(h)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(F);
    • Threat
      • S(E)
    • Vars
      • Q(a);CHECK,OGATE::P(A),XQ(a)
      • B(h);N_GUARD::S(E)
      • S(f);N_SPINR(e),SBLOCK::QAB1(F)
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