MESON Chess Problem Database

Problem Display
PID: 235470 (K1n4B/5p2/1p2N2p/2PQpkpP/R1p5/6RN/b2nr3/b7 w - - 0 1)

Shanshin, Valery Yurevich

1st Prize, Schach, 2016-2017

K1n4B/5p2/1p2N2p/2PQpkpP/R1p5/6RN/b2nr3/b7

#2

9 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Sxd4#
    • 1...c3
      • 2.Sd4#
    • 1...f6
      • 2.Sg7#
  • Tries
    • 1.Sexg5?
      • threat
        • 2.Qxf7#
        • 2.Qd7#
      • 1...hxg5
        • 2.Rxg5#
      • 1...Se4
        • 2.Qd7#
      • 1...c3
        • 2.Rf4#
      • 1...f6
        • 2.Qe6#
        • 2.Qd7#
      • 1...Sd6!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Sexg5#
      • 1...Ke4
        • 2.Qd3#
      • 1...fxe6
        • 2.Qh7#
      • 1...c3
        • 2.Qxf7#
      • 1...g4
        • 2.Seg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::S(G),XB(a)
    • P(e);S_CUTB(a)::S(G)
    • P(k);SBLOCK::S(G)
  • Tries
    • Try
      • S(G);XP(h)
      • Threat
        • DUALS(2)
      • Vars
        • P(j);OGATE,XS(G)::R1(A),XP(j)
        • S(c);::QAB(E)
        • P(e);OGATE::R1(C)
      • Refutation
        • S(l);
  • Actual
    • Q(E);N_PINP(f)
    • Threat
      • QAB(E)+S(G),XP(h)
    • Vars
      • K(g);P_SPINP(e),S_FLIGHT::QAB1(E)
      • P(k);OGATE,P_SPINP(k),SBLOCK,XS(G)::QAB(E)
      • P(e);::QAR2(E),XP(k)
      • P(h);::QAB(E)+S(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).