MESON Chess Problem Database

Problem Display
PID: 177852 (5r2/3pQ3/4P3/1p3p1N/r2p2p1/2PK1k2/p7/5nRN w - - 0 1)

Korenev, Valery Ivanovich

4th Prize, Sahs (Latvia), 1981

5r2/3pQ3/4P3/1p3p1N/r2p2p1/2PK1k2/p7/5nRN

#2

7 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Rg3#
    • 1...Sh2
      • 2.Rg3#
    • 1...Se3
      • 2.Rg3#
    • 1...Sg3
      • 2.Rxg3#
    • 1...dxe6
      • 2.Qb7#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Qd5#
      • 1...dxc3
        • 2.Qf2#
      • 1...dxe6
        • 2.Qc6#
      • 1...Sd2
        • 2.Rg3#
      • 1...Se3
        • 2.Rg3#
      • 1...Sg3
        • 2.Rxg3#
      • 1...d5
        • 2.Qxd5#
      • 1...g3!
    • 1.Qg5?
      • threat
        • 2.Qf4#
      • 1...f4
        • 2.Qxg4#
        • 2.Qd5#
      • 1...dxc3!
    • 1.Qd6?
      • threat
        • 2.Qf4#
        • 2.Qd5#
      • 1...dxe6
        • 2.Qf4#
        • 2.Qc6#
      • 1...g3
        • 2.Qf4#
      • 1...Sd2
        • 2.Rg3#
        • 2.Qg3#
        • 2.Qf4#
      • 1...Se3
        • 2.Rg3#
        • 2.Qg3#
        • 2.Qf4#
      • 1...Sg3
        • 2.Rxg3#
        • 2.Qxg3#
        • 2.Qf4#
      • 1...f4
        • 2.Qd5#
      • 1...dxc3!
    • 1.exd7?
      • threat
        • 2.Qe2#
      • 1...Se3
        • 2.Rg3#
      • 1...Sg3
        • 2.Rxg3#
      • 1...Re8!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Qf2#
      • 1...Sg3
        • 2.Rxg3#
        • 2.Qxg3#
      • 1...g3
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • S(a);N_GUARD::R1(A)
    • S(a);N_GUARD::R1(A),XS(a)
    • P(i);OGATE,XP(F)::QAB(G)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAB(G)
      • Vars
        • P(e);OGATE,XP(C)::QAR1(G)
        • P(i);N_GUARD,XP(F)::QAB(G)
        • S(a);N_GUARD::R1(A)
        • S(a);N_GUARD::R1(A),XS(a)
        • P(i);::QAB(G),XP(i)
      • Refutation
        • P(f);
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Refutation
        • P(e);XP(C)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);::QAR1(G)
        • P(h);::QAB(G)
      • Refutation
        • P(e);XP(C)
    • Try
      • P(F);XP(i)
      • Threat
        • QAB1(G)
      • Vars
        • S(a);N_GUARD::R1(A)
        • S(a);N_GUARD::R1(A),XS(a)
      • Refutation
        • R(j);
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • P(f);OGATE::QAR1(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).