MESON Chess Problem Database

Problem Display
PID: 255925 (4K3/p7/kp1p4/1pbB4/2N5/8/N7/4Q3 w - - 0 1)

Fokin, Yuri Georgievich

Zadachi i Etyudi, 2007

4K3/p7/kp1p4/1pbB4/2N5/8/N7/4Q3

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Sb4#
    • 1...Bf2
      • 2.Sb4#
    • 1...Be3
      • 2.Sb4#
    • 1...Bb4
      • 2.Sxb4#
    • 1...Bd4
      • 2.Sb4#
  • Tries
    • 1.Qa1?
      • threat
        • 2.Sb4#
      • 1...b4
        • 2.Sc3#
      • 1...Bb4
        • 2.Sxb4#
      • 1...bxc4!
    • 1.Qd1?
      • 1...bxc4
        • 2.Qa4#
      • 1...b4
        • 2.Qa4#
      • 1...Bg1
        • 2.Sb4#
      • 1...Bf2
        • 2.Sb4#
      • 1...Be3
        • 2.Sb4#
      • 1...Bb4
        • 2.Sxb4#
      • 1...Bd4
        • 2.Sb4#
      • 1...Ba3!
  • Keys
    • 1.Qb4!
      • 1...Bxb4
        • 2.Sxb4#
      • 1...bxc4
        • 2.Qa4#
      • 1...Bg1
        • 2.Qa3#
      • 1...Bf2
        • 2.Qa3#
      • 1...Be3
        • 2.Qa3#
      • 1...Bd4
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(b);N_GUARD::S(B)
    • B(b);N_GUARD::S(B),XB(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)+S(B),DCHECK
      • Vars
        • P(a);S_CUTB(b)::QAR(A)+S(B)
        • B(b);::QAR(A)+S(B),DCHECK,XB(b)
      • Refutation
        • P(a);XS(C)
    • Try
      • Q(A);
      • Vars
        • P(a);N_GUARD,XS(C)::QAR2(A)
        • P(a);N_GUARD::QAR2(A)
        • B(b);N_GUARD::S(B)
        • B(b);N_GUARD::S(B),XB(b)
      • Refutation
        • B(b);
  • Actual
    • Q(A);
    • Vars
      • B(b);XQ(A)::S(B),XB(b)
      • P(a);N_GUARD,XS(C)::QAR2(A)
      • B(b);N_GUARD::QAR(A)
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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).