MESON Chess Problem Database

Problem Display
PID: 257839 (4n3/3B1N2/N1n3p1/r2k2K1/b2ppQ2/1P6/8/8 w - - 0 1)

Matrenin, Mikhail Vasilevich

Zadachi i Etyudi, 2007

4n3/3B1N2/N1n3p1/r2k2K1/b2ppQ2/1P6/8/8

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sa7
      • 2.Qe5#
    • 1...Se7
      • 2.Qe5#
    • 1...Sb8
      • 2.Qe5#
    • 1...Sd8
      • 2.Qe5#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sf6
      • 2.Qd6#
    • 1...Sc7
      • 2.Qd6#
    • 1...Sg7
      • 2.Qd6#
    • 1...e3
      • 2.Qf3#
  • Tries
    • 1.Sb4+?
      • 1...Sxb4
        • 2.Qe5#
      • 1...Kc5!
    • 1.Sc7+?
      • 1...Sxc7
        • 2.Qd6#
      • 1...Kc5!
    • 1.Qf5+?
      • 1...Se5
        • 2.Qe6#
        • 2.Qxe5#
      • 1...gxf5!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qc4#
      • 1...Bxb3
        • 2.Qxc6#
      • 1...e3
        • 2.Qh1#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Bb5
        • 2.Qc5#
      • 1...Se5
        • 2.Sb4#
      • 1...Sd6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • S(f);N_GUARD::QAR1(B)
    • S(f);N_GUARD::QAR1(B),XS(f)
    • S(h);N_GUARD::QAR1(B),XS(h)
    • S(h);N_GUARD::QAR1(B)
    • P(c);OGATEB::QAB(B)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • S(f);XS(D)::QAR1(B)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • S(h);XS(D)::QAR1(B)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • P(g);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • B(a);N_GUARD,XP(A)::QAB1(B),XS(f)
      • P(c);OGATEB::QAB(B)
      • R(d);N_GUARD::QAR1(B),XR(d)
      • B(a);S_CUTR(d)::QAR1(B)
      • S(f);N_GUARD::S(D)
      • S(h);N_GUARD::S(D)
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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).