MESON Chess Problem Database

Problem Display
PID: 287474 (n1k5/KbPR4/2p1P3/P4p2/1pQ3p1/8/4B3/1r6 w - - 0 1)

Dyachuk, Vasyl Vasilovich

Sachmatija, 2026

n1k5/KbPR4/2p1P3/P4p2/1pQ3p1/8/4B3/1r6

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ba6
      • 2.Qxa6#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qh8#
      • 1...Sxc7
        • 2.Rd8#
      • 1...Rh1!
    • 1.Qf4?
      • threat
        • 2.Rd8#
      • 1...Sxc7
        • 2.Qxc7#
      • 1...Rd1!
    • 1.Qxc6?
      • threat
        • 2.Rd8#
        • 2.Qxb7#
      • 1...Sxc7
        • 2.Qxb7#
        • 2.Qxc7#
      • 1...Rd1
        • 2.Qxb7#
      • 1...Ba6
        • 2.Bxa6#
        • 2.Rd8#
        • 2.Qxa8#
        • 2.Qxa6#
      • 1...Bxc6!
    • 1.a6?
      • threat
        • 2.axb7#
      • 1...Bxa6
        • 2.Qxa6#
      • 1...Ra1!
    • 1.e7?
      • threat
        • 2.e8Q#
      • 1...Sxc7
        • 2.Rd8#
      • 1...Kxd7!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qxb7#
      • 1...Bxa6
        • 2.Bxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(f);OGATEB::QAB(B),XB(f)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • S(g);SBLOCK,XP(F)::R1(G)
      • Refutation
        • R(a);
    • Try
      • Q(B);
      • Threat
        • R1(G)
      • Vars
        • S(g);OGATE,XP(F)::QAR1(B),XS(g)
      • Refutation
        • R(a);
    • Try
      • Q(B);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::QAB1(B),XB(f)
      • Refutation
        • B(f);XQ(B)
    • Try
      • P(C);
      • Threat
        • P(C),XB(f)
      • Vars
        • B(f);OGATE,XP(C)::QAB(B),XB(f)
      • Refutation
        • R(a);P_PINP(C)
    • Try
      • P(D);
      • Threat
        • P=Q
      • Vars
        • S(g);SBLOCK,XP(F)::R1(G)
      • Refutation
        • K(h);S_FLIGHT,XR(G)
  • Actual
    • Q(B);P_PINB(f)
    • Threat
      • QAB1(B),XB(f)
    • Vars
      • B(f);N_SPINB(f),OGATE,XQ(B)::B(A),XB(f)
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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).