MESON Chess Problem Database

Problem Display
PID: 263049 (8/pK1p4/3k1pN1/3p2NR/5p2/b1P5/n4Q2/8 w - - 0 1)

Tyunin, Aleksandr Dmitrevich

SuperProblem, 2019

8/pK1p4/3k1pN1/3p2NR/5p2/b1P5/n4Q2/8

#2

6 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bc5
      • 2.Qxf4#
    • 1...d4
      • 2.Qxd4#
    • 1...a5
      • 2.Qb6#
    • 1...a6
      • 2.Qb6#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Qe7#
      • 1...d4
        • 2.Sf7#
      • 1...Kc5!
    • 1.Qe3?
      • threat
        • 2.Sf7#
        • 2.Qe7#
      • 1...fxg5
        • 2.Qe7#
      • 1...d4
        • 2.Sf7#
        • 2.Qxd4#
      • 1...fxe3!
    • 1.Qxa7?
      • threat
        • 2.Qb6#
      • 1...d4
        • 2.Qxd4#
      • 1...Bc5
        • 2.Qb8#
      • 1...Sb4!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qe7#
      • 1...Kc5
        • 2.Se4#
      • 1...d4
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(b);SBLOCK::QAB(A),XP(c)
    • P(d);OGATEB::QAR2(A),XP(d)
    • P(g);N_GUARD::QAR2(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(d);::S(C)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);XS(C)::QAB1(A)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);XP(g)
      • Threat
        • QAR2(A)
      • Vars
        • P(d);OGATEB::QAR2(A),XP(d)
        • B(b);SBLOCK::QAB(A)
      • Refutation
        • S(a);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(e);N_GUARD,S_CUTP(d),S_FLIGHT::S(C)
      • P(d);::S(C)
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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).