MESON Chess Problem Database

Problem Display
PID: 46026 (4Q1B1/1n1p4/K1p5/2kP1p2/2N2R2/P3n2r/3P3B/8 w - - 0 1)

Bantysh, Nikolai Ivanovich

Uralski Problemist, 2002

4Q1B1/1n1p4/K1p5/2kP1p2/2N2R2/P3n2r/3P3B/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh2
      • 2.Qxe3#
    • 1...Rh4
      • 2.Qxe3#
    • 1...Rh5
      • 2.Qxe3#
    • 1...Rh6
      • 2.Qxe3#
    • 1...Rh7
      • 2.Qxe3#
    • 1...Rh8
      • 2.Qxe3#
    • 1...cxd5
      • 2.Qc8#
    • 1...d6
      • 2.Qxc6#
  • Tries
    • 1.Qe7+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...d6!
    • 1.Qb8?
      • threat
        • 2.Qa7#
      • 1...Sxc4
        • 2.d4#
      • 1...cxd5
        • 2.Qc7#
        • 2.Qc8#
      • 1...Sxd5!
    • 1.Qf8+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...d6!
    • 1.d6?
      • threat
        • 2.d4#
      • 1...Sxc4
        • 2.Rxc4#
      • 1...Sc2
        • 2.Qe5#
      • 1...Sd5!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qd4#
      • 1...Sxc4
        • 2.d4#
      • 1...cxd5
        • 2.Qc7#
      • 1...Sc2
        • 2.d6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(b);N_GUARD,XB(B)::QAB(H),XS(a)
    • R(b);N_GUARD::QAB(H),XS(a)
    • P(e);OGATEB,XP(F)::QAR(H)
    • P(g);OGATE::QAR1(H),XP(e)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(H),XS(f)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • Q(H);
      • Threat
        • QAB(H)
      • Vars
        • S(a);SBLOCK,XS(D)::P(A)
      • Refutation
        • S(a);XP(F)
    • Try
      • Q(H);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(H),XS(f)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • P(F);
      • Threat
        • P(A)
      • Vars
        • S(a);OGATE,XS(D)::R1(E),XS(a)
        • S(a);N_GUARD::QAR2(H)
      • Refutation
        • S(a);
  • Actual
    • Q(H);
    • Threat
      • QAB1(H)
    • Vars
      • S(a);SBLOCK,XS(D)::P(A)
      • P(e);OGATEB,P_SPINP(e),XP(F)::QAR2(H)
      • S(a);N_GUARD::QAR(H)+P(F)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).