MESON Chess Problem Database

Problem Display
PID: 101276 (8/n1N5/3N3K/p3p3/k2qQ3/1pP5/8/2B5 w - - 0 1)

Wainwright, Joseph CJ

Good Companions, 1919

8/n1N5/3N3K/p3p3/k2qQ3/1pP5/8/2B5

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Qxc4#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sc8
      • 2.Qc6#
  • Tries
    • 1.Sc8?
      • threat
        • 2.Sb6#
      • 1...Sxc8
        • 2.Qc6#
      • 1...b2!
    • 1.Sa8?
      • threat
        • 2.Sb6#
      • 1...Sc8
        • 2.Qc6#
      • 1...b2!
    • 1.Qc6+?
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sxc6!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sb6#
      • 1...Qe3+
        • 2.Sxe3#
      • 1...Qb6+
        • 2.Sxb6#
      • 1...Qd2+
        • 2.Sxd2#
      • 1...Qd6+
        • 2.Sxd6#
      • 1...Qxc4
        • 2.Qxc4#
      • 1...b2
        • 2.Qc2#
      • 1...Sc8
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(c);OGATE::QAR2(C),XQ(c)
    • S(f);N_GUARD::QAB(C),XS(f)
    • S(f);N_GUARD::QAB(C)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • S(f);N_GUARD,XS(D)::QAB(C)
      • Refutation
        • P(a);
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • S(f);N_GUARD::QAB(C)
      • Refutation
        • P(a);
    • Try
      • Q(C);CHECK,N_PINQ(c)
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(C),XS(f)
      • Refutation
        • S(f);XQ(C)
  • Actual
    • S(D);N_PINQ(c)
    • Threat
      • S(D)
    • Vars
      • Q(c);CHECK::QAR(C)+S(D),XQ(c)
      • Q(c);CHECK::QAR(C)+S(D),DCHECK,XQ(c)
      • Q(c);OGATE,P_SPINQ(c),XS(D)::QAR2(C),XQ(c)
      • P(a);OGATEB::QAB(C)
      • S(f);N_GUARD::QAB(C)
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