MESON Chess Problem Database

Problem Display
PID: 272819 (b2B4/p2R4/B1p5/1qk1N3/2P1Q2K/2rp4/2n5/1R6 w - - 0 1)

Suvorov, Ivan

Shakhmatnaya kompozitsiya, 1998

b2B4/p2R4/B1p5/1qk1N3/2P1Q2K/2rp4/2n5/1R6

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Be7#
    • 1...Qxc4
      • 2.Be7#
    • 1...Qxa6
      • 2.Be7#
    • 1...Qa5
      • 2.Be7#
    • 1...Qb6
      • 2.Be7#
    • 1...Qb7
      • 2.Be7#
    • 1...Rxc4
      • 2.Sxd3#
    • 1...Sa1
      • 2.Qe3#
      • 2.Qd4#
    • 1...Se1
      • 2.Qe3#
      • 2.Qd4#
    • 1...Sa3
      • 2.Qe3#
      • 2.Qd4#
    • 1...Se3
      • 2.Qxe3#
      • 2.Qd4#
    • 1...Sb4
      • 2.Qe3#
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
  • Tries
    • 1.Qe3+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sxe3!
    • 1.Qf4?
      • threat
        • 2.Qf8#
      • 1...Qxc4
        • 2.Be7#
      • 1...Rxc4
        • 2.Sxd3#
      • 1...Qb8!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qf8#
      • 1...Qxc4+
        • 2.Sxc4#
      • 1...Rxc4+
        • 2.Sg4#
      • 1...Qb8
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(d);::B(H)
    • Q(d);P_PINQ(C),XP(B)::B(H)
    • Q(d);XB(F)::B(H)
    • R(b);N_GUARD,P_PINQ(C),XP(B)::S(E),XP(c)
    • S(a);N_GUARD::QAB1(C),XS(a)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(C),XS(a)
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • Q(d);P_PINQ(C),XP(B)::B(H)
        • R(b);N_GUARD,P_PINQ(C),XP(B)::S(E),XP(c)
      • Refutation
        • Q(d);
  • Actual
    • Q(C);
    • Threat
      • QAB(C)
    • Vars
      • Q(d);CHECK,XP(B)::QAR(C)+S(E),XQ(d)
      • R(b);CHECK,SBLOCK,XP(B)::QAR(C)+S(E)
      • Q(d);::QAR(C)+S(E),DCHECK,XP(c)
HTML5 logo

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).