MESON Chess Problem Database

Problem Display
PID: 56658 (K2b4/5nQ1/2B2N2/2B2b2/N1k5/3pn3/P7/2q5 w - - 0 1)

van Dijk, Nils Gustav Gerard

1st Prize, Postsjakk, 1965

K2b4/5nQ1/2B2N2/2B2b2/N1k5/3pn3/P7/2q5

#2

7 + 7

3772 FIDE Album (1965-1967) 1976

SOLUTION

  • SOUND
  • Tries
    • 1.Sg4?
      • threat
        • 2.Qd4#
      • 1...Qb2
        • 2.Sxe3#
      • 1...Qa1
        • 2.Sxe3#
      • 1...Qc3
        • 2.Sxe3#
        • 2.Qxc3#
      • 1...Sc2
        • 2.Qc3#
      • 1...Se5
        • 2.Sxe5#
      • 1...Bf6!
    • 1.Sd5?
      • threat
        • 2.Qd4#
      • 1...Qb2
        • 2.Sxe3#
      • 1...Qa1
        • 2.Sxe3#
      • 1...Qc3
        • 2.Sxe3#
        • 2.Qxc3#
      • 1...Bf6
        • 2.Sdb6#
      • 1...Sc2
        • 2.Qc3#
      • 1...Se5!
    • 1.Sd7?
      • threat
        • 2.Qd4#
      • 1...Qb2
        • 2.Sxb2#
      • 1...Qc3
        • 2.Qxc3#
      • 1...Bf6
        • 2.Sdb6#
      • 1...Sc2
        • 2.Qc3#
      • 1...Se5
        • 2.Sxe5#
      • 1...Qa1!
    • 1.Qxf7+?
      • 1...Sd5
        • 2.Qxd5#
      • 1...Be6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qd4#
      • 1...Qb2
        • 2.Sxb2#
      • 1...Qa1
        • 2.Sd2#
      • 1...Qc3
        • 2.Qxc3#
      • 1...Bf6
        • 2.Sb6#
      • 1...Sc2
        • 2.Qc3#
      • 1...Se5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(F)
      • Vars
        • Q(a);N_GUARD::S(E),XS(c)
        • S(c);S_CUTQ(a)::QAR1(F)
        • S(f);N_GUARD::S(E),XS(f)
      • Refutation
        • B(g);
    • Try
      • S(E);
      • Threat
        • QAR1(F)
      • Vars
        • Q(a);N_GUARD::S(E),XS(c)
        • B(g);N_GUARD::S(E)
        • S(c);S_CUTQ(a)::QAR1(F)
      • Refutation
        • S(f);
    • Try
      • S(E);
      • Threat
        • QAR1(F)
      • Vars
        • Q(a);N_GUARD::S(B),XQ(a)
        • Q(a);N_GUARD::QAR1(F),XQ(a)
        • B(g);N_GUARD::S(E)
        • S(c);S_CUTQ(a)::QAR1(F)
        • S(f);N_GUARD::S(E),XS(f)
      • Refutation
        • Q(a);
    • Try
      • Q(F);CHECK,XS(f)
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB1(F),XS(c)
      • Refutation
        • B(e);P_SPINB(e)
  • Actual
    • S(E);
    • Threat
      • QAR1(F)
    • Vars
      • Q(a);N_GUARD::S(B),XQ(a)
      • Q(a);N_GUARD::S(E)
      • Q(a);N_GUARD::QAR1(F),XQ(a)
      • B(g);N_GUARD::S(B)
      • S(c);S_CUTQ(a)::QAR1(F)
      • S(f);N_GUARD::S(E)
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