MESON Chess Problem Database

Problem Display
PID: 159224 (8/KN1p4/2k5/B6Q/n7/8/8/8 w - - 0 1)

Antipin, Ivan Ivanovich

Kudesnik, 2006

8/KN1p4/2k5/B6Q/n7/8/8/8

#2

4 + 3

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qc5#
    • 1...Sc3
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sb6
      • 2.Qc5#
    • 1...d5
      • 2.Qe8#
  • Tries
    • 1.Kb8?
      • 1...Sc5
        • 2.Qxc5#
      • 1...d5
        • 2.Qe8#
      • 1...Sb2
        • 2.Qc5#
      • 1...Sc3
        • 2.Qc5#
      • 1...Sb6
        • 2.Qc5#
      • 1...d6!
    • 1.Bb6?
      • 1...Sxb6
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...d5
        • 2.Qe8#
      • 1...Sb2
        • 2.Qc5#
      • 1...Sc3
        • 2.Qc5#
      • 1...d6!
    • 1.Bd8?
      • 1...Sc5
        • 2.Qxc5#
      • 1...d5
        • 2.Qe8#
      • 1...Sb2
        • 2.Qc5#
      • 1...Sc3
        • 2.Qc5#
      • 1...Sb6
        • 2.Qc5#
      • 1...d6!
    • 1.Qe5?
      • threat
        • 2.Sd8#
      • 1...Sc5
        • 2.Qxc5#
      • 1...d5
        • 2.Qe8#
      • 1...d6!
    • 1.Qf5?
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sb6
        • 2.Qc5#
      • 1...Sb2
        • 2.Qc5#
      • 1...Sc3
        • 2.Qc5#
      • 1...d6
        • 2.Sd8#
      • 1...d5!
  • Keys
    • 1.Ka6!
      • threat
        • 2.Qb5#
      • 1...Sc5+
        • 2.Qxc5#
      • 1...Sb6
        • 2.Qc5#
      • 1...d5
        • 2.Qe8#
      • 1...Sc3
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAR1(B)
    • S(a);N_GUARD::QAR1(B),XS(a)
    • P(c);OGATEB,SBLOCK::QAB(B)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
        • P(c);OGATEB,SBLOCK::QAB(B)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • P(c);
    • Try
      • B(A);
      • Vars
        • S(a);N_GUARD,XB(A)::QAR1(B)
        • S(a);N_GUARD::QAR1(B),XS(a)
        • P(c);OGATEB,SBLOCK::QAB(B)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • P(c);
    • Try
      • B(A);
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
        • P(c);OGATEB,SBLOCK::QAB(B)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Threat
        • S(D)
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
        • P(c);OGATEB,SBLOCK::QAB(B)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
        • P(c);SBLOCK::S(D)
      • Refutation
        • P(c);
  • Actual
    • K(C);P-FLIGHT
    • Threat
      • QAB1(B)
    • Vars
      • S(a);CHECK,N_GUARD::QAR1(B),XS(a)
      • S(a);N_GUARD::QAR1(B)
      • P(c);OGATEB,SBLOCK::QAB(B)
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