MESON Chess Problem Database

Problem Display
PID: 157815 (8/2K1p1Q1/B1N1p3/3kP2b/7q/1n1P4/2Rp4/6B1 w - - 0 1)

Lukashev, Viktor Sergeevich

3rd Comm., Best Problems, 2008

8/2K1p1Q1/B1N1p3/3kP2b/7q/1n1P4/2Rp4/6B1

#2

8 + 7

4901 Best Problems 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Sb4#
      • 2.Sxe7#
      • 2.Bc4#
    • 1...Qg3
      • 2.Sb4#
      • 2.Sxe7#
      • 2.Bc4#
    • 1...Qg5
      • 2.Sb4#
      • 2.Bc4#
    • 1...Qf6
      • 2.Bc4#
    • 1...Qh1
      • 2.Sb4#
      • 2.Sxe7#
      • 2.Bc4#
    • 1...Qh2
      • 2.Sb4#
      • 2.Sxe7#
      • 2.Bc4#
    • 1...Qh3
      • 2.Sb4#
      • 2.Sxe7#
      • 2.Bc4#
    • 1...Qa4
      • 2.Sxe7#
    • 1...Qb4
      • 2.Sxb4#
    • 1...Qc4
      • 2.Bxc4#
    • 1...Qd4
      • 2.Sxe7#
    • 1...Qe4
      • 2.Sxe7#
    • 1...Qf4
      • 2.Sxe7#
    • 1...Qg4
      • 2.Sxe7#
    • 1...Bg4
      • 2.Sb4#
      • 2.Bc4#
    • 1...Sa1
      • 2.Rc5#
    • 1...Sc1
      • 2.Rc5#
    • 1...Sd4
      • 2.Sb4#
    • 1...Sa5
      • 2.Rc5#
    • 1...Sc5
      • 2.Rxc5#
  • Tries
    • 1.Rc4?
      • threat
        • 2.Sb4#
      • 1...Qxc4
        • 2.Bxc4#
      • 1...Qf6!
    • 1.Qh8?
      • threat
        • 2.Qd8#
      • 1...Qb4
        • 2.Sxb4#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Be8!
    • 1.Qg2+?
      • 1...Qe4
        • 2.Bc4#
        • 2.Qxe4#
        • 2.dxe4#
      • 1...Bf3!
    • 1.Qg5?
      • threat
        • 2.Sxe7#
      • 1...Qxg5
        • 2.Bc4#
      • 1...Qb4
        • 2.Sxb4#
      • 1...Qc4
        • 2.Bxc4#
      • 1...Qf2!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Bc4#
      • 1...Qxd4
        • 2.Sxe7#
      • 1...Sxd4
        • 2.Sb4#
      • 1...Sa5
        • 2.Rc5#

Anticipated by 171468(1984)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 10
  • Sets
    • Q(c);N_GUARD::B(E)
    • Q(c);N_GUARD::S(F),XP(g)
    • Q(c);N_GUARD::S(F),XQ(c)
    • Q(c);N_GUARD,P_PINS(F)::B(E),XQ(c)
    • Q(c);N_GUARD,P_PINP(D)::S(F),XP(g)
    • S(b);N_GUARD::R1(B)
    • S(b);S_CUTQ(c)::S(F)
    • S(b);N_GUARD::R1(B),XS(b)
  • Tries
    • Try
      • R(B);
      • Threat
        • S(F)
      • Vars
        • Q(c);OGATE,P_PINS(F),XR(B)::B(E),XQ(c)
      • Refutation
        • Q(c);
    • Try
      • Q(H);
      • Threat
        • QAR(H)
      • Vars
        • Q(c);N_GUARD::S(F),XQ(c)
        • S(b);N_GUARD::R1(B),XS(b)
      • Refutation
        • B(e);
    • Try
      • Q(H);CHECK
      • Refutation
        • B(e);P_SPINB(e)
    • Try
      • Q(H);
      • Threat
        • S(F),XP(g)
      • Vars
        • Q(c);N_GUARD,XQ(H)::B(E)
        • Q(c);N_GUARD::S(F),XQ(c)
        • Q(c);N_GUARD,P_PINS(F)::B(E),XQ(c)
      • Refutation
        • Q(c);
  • Actual
    • B(A);
    • Threat
      • B(E)
    • Vars
      • Q(c);N_GUARD,SBLOCK,XB(A)::S(F),XP(g)
      • S(b);SBLOCK,XB(A)::S(F)
      • S(b);N_GUARD::R1(B)
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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).