MESON Chess Problem Database

Problem Display
PID: 268955 (8/4R3/2n1N1b1/2K1BpP1/1pp1kP2/p1PR2P1/8/1Q6 w - - 0 1)

Dyachuk, Vasyl Vasilovich

1/2 Prize, Labai-80 JT (Pat a Mat), 2022

8/4R3/2n1N1b1/2K1BpP1/1pp1kP2/p1PR2P1/8/1Q6

#2

10 + 7

6490 yacpdb 2023

SOLUTION

  • SOUND
  • Sets
    • 1...bxc3
      • 2.Rxc3#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Rf3#
      • 1...Sxd4
        • 2.Bxd4#
      • 1...bxc3
        • 2.Rxc3#
      • 1...cxd3
        • 2.Qe1#
      • 1...a2!
    • 1.Red7?
      • threat
        • 2.Qe1#
        • 2.Qh1#
      • 1...Sxe5
        • 2.R7d4#
        • 2.Qe1#
      • 1...cxd3
        • 2.Qxd3#
      • 1...Sd4
        • 2.R7xd4#
      • 1...Bh5!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Re3#
      • 1...Sxd4
        • 2.Sxd4#
      • 1...cxd3
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(b);OGATE,XP(B)::QAB(A)+R(C),XP(b)
  • Tries
    • Try
      • S(I);
      • Threat
        • QAB(A)+R(C)
      • Vars
        • S(f);OGATE,XS(I)::R(J)+B(G),XS(f)
        • P(b);OGATE,XP(B)::QAB(A)+R(C),XP(b)
        • P(c);P_SPINP(c),SBLOCK,XR(C)::QAR(A)
      • Refutation
        • P(a);
    • Try
      • R(J);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATE,P_SPINP(c),XR(C)::QAB1(A),XP(c)
        • S(f);N_GUARD::R1(J),XS(f)
      • Refutation
        • B(g);
  • Actual
    • B(G);
    • Threat
      • QAB(A)+R(C),DCHECK
    • Vars
      • S(f);XB(G)::R(J)+S(I),XS(f)
      • P(c);P_SPINP(c),SBLOCK,XR(C)::QAB(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).