MESON Chess Problem Database

Problem Display
PID: 123069 (6r1/p3p1Nb/8/K3kr1R/n3N3/3PBn2/B2Q4/8 w - - 0 1)

Pilchenko, Viacheslav Karlovich

Shavirin, Valery Mikhailovich

2nd HM., Problemas, 2000

6r1/p3p1Nb/8/K3kr1R/n3N3/3PBn2/B2Q4/8

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Qh2#
    • 1...Sg1
      • 2.Qh2#
    • 1...Sh2
      • 2.Qxh2#
    • 1...Sd4
      • 2.Bf4#
      • 2.Qh2#
    • 1...Sh4
      • 2.Qh2#
  • Tries
    • 1.Bd4+?
      • 1...Sxd4
        • 2.Qh2#
      • 1...Kxd4+!
    • 1.Qc3+?
      • 1...Sd4
        • 2.Qxd4#
        • 2.Qc7#
      • 1...Sxc3!
    • 1.Qb4?
      • threat
        • 2.Qxe7#
      • 1...Rxg7
        • 2.Qb8#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sg5
        • 2.Qd4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...e6
        • 2.Qd6#
      • 1...Re8!
    • 1.Qf2?
      • threat
        • 2.Qg3#
      • 1...Sg5
        • 2.Bd4#
      • 1...Rxg7!
    • 1.d4+?
      • 1...Sxd4
        • 2.Qxd4#
      • 1...Kxe4+!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qg3#
      • 1...Rxg7
        • 2.Qxg7#
      • 1...Sg5
        • 2.d4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::QAB(B)
    • S(a);N_GUARD::QAB(B),XS(a)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • S(a);SBLOCK,XB(D)::QAB(B)
      • Refutation
        • K(c);CHECK,N_SPINR(d),S_FLIGHT,XB(D)
    • Try
      • Q(B);CHECK
      • Refutation
        • S(b);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR2(B),XP(f)
      • Vars
        • R(h);N_GUARD,XS(H)::QAB(B)
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(a);N_GUARD,N_SPINR(d)::QAB1(B)
        • S(b);N_GUARD::QAR2(B),XS(b)
        • P(f);N_GUARD::QAB1(B)
      • Refutation
        • R(h);
    • Try
      • Q(B);
      • Threat
        • QAB(B)
      • Vars
        • S(a);N_GUARD,N_SPINR(d)::B(D)
      • Refutation
        • R(h);XS(H)
    • Try
      • P(C);CHECK
      • Vars
        • S(a);OGATE,XP(C)::QAB1(B),XS(a)
      • Refutation
        • K(c);CHECK,N_SPINR(d),P-FLIGHT,XS(E)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • R(h);OGATE,XS(H)::QAB(B),XR(h)
      • S(a);N_GUARD,N_SPINR(d)::P(C)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).