MESON Chess Problem Database

Problem Display
PID: 263115 (5q2/1p6/b7/B3PP2/3ppQ2/RBPk4/P1pN1pN1/4bK2 w - - 0 1)

Dyachuk, Vasyl Vasilovich

2/3 Prize, SuperProblem, 2020

5q2/1p6/b7/B3PP2/3ppQ2/RBPk4/P1pN1pN1/4bK2

#2

11 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bc4
      • 2.Bxc4#
    • 1...dxc3
      • 2.Qe3#
    • 1...e3
      • 2.Qxd4#
  • Tries
    • 1.cxd4?
      • threat
        • 2.Qe3#
        • 2.Qxe4#
      • 1...Qxf5
        • 2.Qe3#
      • 1...Bxd2
        • 2.Qxd2#
      • 1...Qb4
        • 2.Qe3#
      • 1...Qh6
        • 2.Qxe4#
      • 1...e3
        • 2.Bc4#
        • 2.Qxe3#
        • 2.Qe4#
      • 1...Kxd4+!
    • 1.c4?
      • threat
        • 2.Qxe4#
      • 1...Qxf5
        • 2.Ba4#
      • 1...Bxd2
        • 2.Qxd2#
      • 1...e3
        • 2.Qe4#
      • 1...Qb4!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Bxe4#
      • 1...Qxf5
        • 2.c4#
      • 1...Bxd2
        • 2.Qxe4#
      • 1...dxc3
        • 2.Qe3#
      • 1...e3
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(g);N_GUARD::B(F),XB(g)
    • P(e);N_GUARD,XP(G)::QAR1(H)
    • P(f);OGATE::QAR1(H),XP(e)
  • Tries
    • Try
      • P(G);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);XP(K)::QAR1(H)
        • B(a);OGATE,XS(C)::QAR1(H),XB(a)
        • Q(i);::QAR1(H)
        • Q(i);::QAB1(H),XP(f)
      • Refutation
        • K(d);CHECK,P-FLIGHT,P_SPINP(f),XP(G)
    • Try
      • P(G);
      • Threat
        • QAB1(H),XP(f)
      • Vars
        • Q(i);N_GUARD,XP(K)::R(E)+B(F)
        • B(a);OGATE,XS(C)::QAR1(H),XB(a)
        • P(f);::QAB1(H)
      • Refutation
        • Q(i);
  • Actual
    • B(F);
    • Threat
      • B(F),XP(f)
    • Vars
      • Q(i);N_GUARD,XP(K)::R(E)+P(G)
      • B(a);SBLOCK,XS(C)::QAB1(H),XP(f)
      • P(e);N_GUARD,P_SPINP(e),XP(G)::QAR1(H)
      • P(f);OGATE::QAR1(H),XP(e)
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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).