MESON Chess Problem Database

Problem Display
PID: 158346 (8/3B4/2QK4/3N4/4k3/1p6/1nP1P3/B2n4 w - - 0 1)

Barnes, Barry Peter

British Chess Magazine, 2001

8/3B4/2QK4/3N4/4k3/1p6/1nP1P3/B2n4

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qa4#
    • 1...Sd3
      • 2.Qc4#
      • 2.cxd3#
    • 1...Sa4
      • 2.Qxa4#
      • 2.Qc4#
    • 1...Sc4+
      • 2.Qxc4#
  • Tries
    • 1.Bf5+?
      • 1...Kd4
        • 2.Qa4#
        • 2.Qc5#
      • 1...Kxf5!
    • 1.Qa4+?
      • 1...Sc4+
        • 2.Qxc4#
      • 1...Sxa4!
    • 1.Qc3?
      • threat
        • 2.Qe5#
      • 1...Sc4+
        • 2.Qxc4#
      • 1...Sd3
        • 2.Qd4#
        • 2.Qxd3#
        • 2.Qc4#
        • 2.cxd3#
      • 1...Sxc3!
    • 1.Qc5?
      • 1...Sc4+
        • 2.Qxc4#
      • 1...Sf2
        • 2.Qe3#
      • 1...Sc3
        • 2.Qe3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sd3
        • 2.Qd4#
        • 2.Qc4#
        • 2.cxd3#
      • 1...Sa4
        • 2.Qb4#
        • 2.Qd4#
        • 2.Qc4#
      • 1...bxc2!
  • Keys
    • 1.Kc5!
      • threat
        • 2.Qe6#
      • 1...Sd3+
        • 2.cxd3#
      • 1...Sa4+
        • 2.Qxa4#
      • 1...Ke5
        • 2.Qe6#
      • 1...Sc4
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(d);P-FLIGHT,P_SPINS(b)::QAR(E)
    • S(b);CHECK,N_GUARD::QAR2(E),XS(b)
  • Tries
    • Try
      • B(G);CHECK
      • Refutation
        • K(d);S_FLIGHT,XB(G)
    • Try
      • Q(E);CHECK
      • Vars
        • S(b);CHECK,N_GUARD,P_SPINS(b)::QAR2(E),XS(b)
      • Refutation
        • S(b);XQ(E)
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • S(b);CHECK,N_GUARD::QAR2(E),XS(b)
      • Refutation
        • S(a);XQ(E)
    • Try
      • Q(E);
      • Vars
        • S(b);CHECK,N_GUARD::QAR2(E),XS(b)
        • S(a);N_GUARD::QAR1(E)
        • S(a);N_GUARD::QAR1(E),XS(a)
      • Refutation
        • P(c);XP(B)
  • Actual
    • K(F);S_FLIGHT
    • Threat
      • QAR2(E)
    • Vars
      • S(b);CHECK,OGATE::P(B),XS(b)
      • S(b);CHECK,N_GUARD::QAR(E),XS(b)
      • K(d);P-FLIGHT,P_SPINS(b)::QAR1(E)
      • S(b);::QAB(E)
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