MESON Chess Problem Database

Problem Display
PID: 255155 (8/8/5p1K/2QpN2n/3NkPR1/8/1r1nPP2/Bb1R4 w - - 0 1)

Antipin, Ivan Ivanovich

Zadachi i Etyudi, 2006

8/8/5p1K/2QpN2n/3NkPR1/8/1r1nPP2/Bb1R4

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.exd3#
    • 1...Sf3
      • 2.exf3#
  • Tries
    • 1.Sef3?
      • threat
        • 2.Qe7#
      • 1...Sxf3
        • 2.exf3#
      • 1...Rb6
        • 2.Sxd2#
      • 1...Rb7
        • 2.Sxd2#
      • 1...Sg7
        • 2.f5#
      • 1...Sc4!
    • 1.Qc3?
      • threat
        • 2.Qe3#
      • 1...Sc4
        • 2.Qf3#
        • 2.f3#
      • 1...Bd3
        • 2.Qxd3#
        • 2.exd3#
      • 1...Sf1
        • 2.Qf3#
        • 2.f3#
      • 1...Rb3!
    • 1.f5+?
      • 1...Kxe5
        • 2.Qe7#
        • 2.Qc7#
      • 1...Sf4!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Sef3#
        • 2.Sec6#
      • 1...Kxd4
        • 2.Qb4#
      • 1...fxe5
        • 2.Qxe5#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Rb6
        • 2.Sec6#
      • 1...Rb7
        • 2.Sd7#
      • 1...Sf3
        • 2.Sexf3#
        • 2.exf3#
      • 1...Sg7
        • 2.f5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(a);OGATE::P(C),XB(a)
    • S(c);OGATE::P(C),XS(c)
  • Tries
    • Try
      • S(I);
      • Threat
        • QAR(H)
      • Vars
        • S(c);OGATE,XS(I)::P(C),XS(c)
        • R(b);N_GUARD::S(I),XS(c)
        • S(f);N_GUARD::R(G)+P(F)
      • Refutation
        • S(c);
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Refutation
        • R(b);
    • Try
      • P(F);CHECK
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • Q(H);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);OGATEB,P-FLIGHT,P_SPINR(b),P_SPINS(c),XS(E)::QAR2(H)
      • P(g);OGATE,P_SPINP(g),XS(I)::QAR1(H),XP(g)
      • S(c);::QAR(H)+S(I),XS(c)
      • R(b);::QAR(H)+S(I)
      • S(f);N_GUARD::R(G)+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).