MESON Chess Problem Database

Problem Display
PID: 263042 (3b4/1B6/K3b1Q1/3Pp1nP/4R3/4PkNp/3R4/3n1N2 w - - 0 1)

Shanshin, Valery Yurevich

4th Prize, SuperProblem, 2018

3b4/1B6/K3b1Q1/3Pp1nP/4R3/4PkNp/3R4/3n1N2

#2

10 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5
      • 2.Qf5#
    • 1...Bf5
      • 2.Qxf5#
    • 1...Bf7
      • 2.Qf5#
    • 1...Bg8
      • 2.Qf5#
    • 1...Sxe4
      • 2.Qxe4#
    • 1...Sf7
      • 2.Sh2#
    • 1...Sh7
      • 2.Sh2#
  • Tries
    • 1.Sh1?
      • threat
        • 2.Sh2#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Sf2
        • 2.Rxf2#
      • 1...h2
        • 2.Sxh2#
      • 1...Sxe4!
    • 1.Qf6+?
      • 1...Bf5
        • 2.Qxf5#
      • 1...Bxf6!
    • 1.dxe6?
      • threat
        • 2.Rf4#
        • 2.Qf5#
      • 1...Sxe4
        • 2.Bxe4#
        • 2.Qxe4#
        • 2.Qf5#
      • 1...Sxe6
        • 2.Sh2#
        • 2.Rf4#
        • 2.Rxe5#
        • 2.Qg4#
      • 1...Sf2
        • 2.Rf4#
      • 1...Sxe3!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sh4#
      • 1...Kxe4
        • 2.dxe6#
      • 1...Bxf5
        • 2.Qxf5#
      • 1...Sxe4
        • 2.Sh2#
      • 1...Sf7
        • 2.Qg4#
      • 1...Sh7
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(f);N_GUARD,XP(F)::QAR2(I)
    • B(f);N_GUARD::QAR2(I),XB(f)
    • B(f);N_GUARD::QAR2(I)
    • S(e);OGATE,XR(E)::QAB1(I),XS(e)
    • S(e);::S(A)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(A)
      • Vars
        • B(f);N_GUARD::QAR2(I),XB(f)
        • S(a);N_GUARD::R1(B),XS(a)
        • P(c);::S(A),XP(c)
      • Refutation
        • S(e);XR(E)
    • Try
      • Q(I);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAR2(I),XB(f)
      • Refutation
        • B(g);XQ(I)
    • Try
      • P(F);XB(f)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::B(J)+R(E),DCHECK
      • Refutation
        • S(a);XP(C)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • K(b);S_FLIGHT,XR(E)::B(J)+P(F),XB(f)
      • B(f);OGATE,XS(D)::QAR2(I),XB(f)
      • S(e);SBLOCK,XR(E)::S(A)
      • S(e);OGATE::QAB1(I)
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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).