MESON Chess Problem Database

Problem Display
PID: 267510 (8/2K2p2/3Nk1bq/1R1Np2B/n1Q5/4R3/1B2pr1b/8 w - - 0 1)

Matrenin, Mikhail Vasilevich

Zadachi i Etyudi, 2013

8/2K2p2/3Nk1bq/1R1Np2B/n1Q5/4R3/1B2pr1b/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Rxe5#
    • 1...Bg1
      • 2.Rxe5#
    • 1...Bf5
      • 2.Bxf7#
  • Tries
    • 1.Qc6?
      • threat
        • 2.Qd7#
        • 2.Qe8#
      • 1...Qg5
        • 2.Qd7#
      • 1...Qf8
        • 2.Qd7#
      • 1...Qh8
        • 2.Qd7#
      • 1...Sb6
        • 2.Qe8#
      • 1...f5
        • 2.Qd7#
      • 1...f6
        • 2.Qd7#
      • 1...Sc5!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sd4#
      • 1...e4+
        • 2.Sf4#
      • 1...Kxf5
        • 2.Qg4#
      • 1...Qxe3
        • 2.Sg7#
      • 1...Rxf5
        • 2.Qc6#
      • 1...Bxf5
        • 2.Qc6#
      • 1...f6
        • 2.Sde7#
      • 1...Qf4
        • 2.Sg7#
      • 1...Rf4
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(b);S_CUTB(c)::R1(B),XP(e)
    • B(c);N_GUARD::R1(B),XP(e)
    • B(g);OGATE::B(F),XP(i)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);::QAB1(C)
        • S(d);::QAR2(C)
        • P(i);::QAB1(C)
      • Refutation
        • S(d);
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • P(e);CHECK::QAB(C)+S(E),DCHECK
      • K(f);N_SPINP(e),OGATEB,S_FLIGHT,XS(G)::QAB1(C)
      • Q(h);N_GUARD,N_SPINP(e),XR(B)::S(G)
      • R(b);SBLOCK,XS(G)::QAR2(C)
      • B(g);SBLOCK,XS(G)::QAR2(C)
      • P(i);SBLOCK::QAB(C)+S(E)
      • Q(h);N_GUARD::S(G)
      • R(b);S_CUTB(c)::R1(B),XP(e)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).