MESON Chess Problem Database

Problem Display
PID: 275624 (8/3R1p2/3pp3/1Q6/3p1Pp1/2p1kPP1/1n2P3/1N3K2 w - - 0 1)

Aliovsadzade, Rauf Gadzhiaga ogli

Chernyavsky, Mykola Vasilovich

Problemist Ukraini, 2023

8/3R1p2/3pp3/1Q6/3p1Pp1/2p1kPP1/1n2P3/1N3K2

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sa4
      • 2.Qd3#
    • 1...d3
      • 2.Qb6#
  • Tries
    • 1.Rxd6?
      • threat
        • 2.Qe5#
      • 1...Sd3
        • 2.Qxd3#
      • 1...e5
        • 2.Qxe5#
      • 1...f6
        • 2.Rxe6#
      • 1...Sc4!
    • 1.Qf5?
      • threat
        • 2.Qe4#
      • 1...exf5
        • 2.Re7#
      • 1...d5
        • 2.Qe5#
      • 1...gxf3!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qe4#
      • 1...gxf3
        • 2.Qxf3#
      • 1...exd5
        • 2.Re7#
      • 1...f5
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::QAR1(G)
    • S(a);N_GUARD::QAR1(G),XS(a)
    • P(d);OGATEB::QAB(G)
  • Tries
    • Try
      • R(H);XP(f)
      • Threat
        • QAR2(G)
      • Vars
        • S(a);N_GUARD::QAR1(G),XS(a)
        • P(g);::QAR2(G),XP(g)
        • P(h);N_GUARD::R(H),XP(g)
      • Refutation
        • S(a);
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • P(g);OGATEB,XQ(G)::R(H)
        • P(f);N_GUARD::QAR2(G)
      • Refutation
        • P(e);XP(D)
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • P(e);OGATE,XP(D)::QAR1(G),XP(e)
      • P(g);OGATEB,XQ(G)::R(H)
      • P(h);N_GUARD::QAR(G),XP(g)
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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).