MESON Chess Problem Database

Problem Display
PID: 174831 (7b/3p3B/b1pQ4/3P4/NqnkNP2/1PR5/8/B5nK w - - 0 1)

Barth, Michael

Freie Presse, 1998

7b/3p3B/b1pQ4/3P4/NqnkNP2/1PR5/8/B5nK

#2

10 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Qxc5#
    • 1...Qxb3
      • 2.Qc5#
    • 1...Qxa4
      • 2.Qc5#
    • 1...Qb7
      • 2.Qc5#
    • 1...Qb8
      • 2.Qc5#
  • Tries
    • 1.Sac5?
      • threat
        • 2.Rd3#
      • 1...Qxc5
        • 2.Qxc5#
      • 1...Sb2
        • 2.dxc6#
      • 1...Qxc3!
    • 1.Sd2?
      • threat
        • 2.Rd3#
      • 1...Qxc3
        • 2.Qc5#
      • 1...Sb2!
    • 1.Sf2?
      • threat
        • 2.Rd3#
      • 1...Qxc3
        • 2.Qc5#
      • 1...Sb2!
    • 1.Sg3?
      • threat
        • 2.Rd3#
      • 1...Qxc3
        • 2.Qc5#
      • 1...Sb2!
    • 1.Sec5?
      • threat
        • 2.Rd3#
      • 1...Sb2
        • 2.dxc6#
      • 1...Qxc3!
    • 1.Sg5?
      • threat
        • 2.Rd3#
      • 1...Qxc3
        • 2.Qc5#
      • 1...Sb2!
    • 1.Rf3+?
      • 1...Qc3
        • 2.Bxc3#
        • 2.Qc5#
      • 1...Sb2!
    • 1.Rg3+?
      • 1...Qc3
        • 2.Bxc3#
        • 2.Qc5#
      • 1...Sb2!
    • 1.Rh3+?
      • 1...Qc3
        • 2.Bxc3#
        • 2.Qc5#
      • 1...Sb2!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Rd3#
      • 1...Qxc3
        • 2.Qc5#
      • 1...Sb2
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(b);N_GUARD::QAB1(I),XQ(b)
    • Q(b);N_GUARD,XP(C)::QAB1(I)
    • Q(b);N_GUARD,XS(E)::QAB1(I)
    • Q(b);N_GUARD::QAB1(I)
  • Tries
    • Try
      • S(E);
      • Threat
        • B(A)+R(D),DCHECK
      • Vars
        • Q(b);OGATE,XS(E)::QAB1(I),XQ(b)
        • S(c);N_GUARD::QAR(I)+P(H),XP(f)
      • Refutation
        • Q(b);P_SPINQ(b),XR(D)
    • Try
      • S(F);
      • Threat
        • B(A)+R(D),DCHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b),XR(D)::QAB1(I)
      • Refutation
        • S(c);
    • Try
      • S(F);
      • Threat
        • B(A)+R(D),DCHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b),XR(D)::QAB1(I)
      • Refutation
        • S(c);
    • Try
      • S(F);
      • Threat
        • B(A)+R(D),DCHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b),XR(D)::QAB1(I)
      • Refutation
        • S(c);
    • Try
      • S(F);
      • Threat
        • B(A)+R(D),DCHECK
      • Vars
        • S(c);N_GUARD::QAR(I)+P(H),XP(f)
      • Refutation
        • Q(b);P_SPINQ(b),XR(D)
    • Try
      • S(F);
      • Threat
        • B(A)+R(D),DCHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b),XR(D)::QAB1(I)
      • Refutation
        • S(c);
    • Try
      • R(D);CHECK
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • R(D);CHECK
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • R(D);CHECK
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • S(F);
    • Threat
      • B(A)+R(D),DCHECK
    • Vars
      • Q(b);N_GUARD,P_SPINQ(b),XR(D)::QAB1(I)
      • S(c);N_GUARD::QAB1(I)
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