MESON Chess Problem Database

Problem Display
PID: 156901 (1r6/1b1n3q/3B4/2N4Q/2NkPp2/1p1B3p/1K3p1r/5R1n w - - 0 1)

Chekarkov, Vladimir Nikolaevich

Egorov, Gennady Sergeevich

Shanshin, Valery Yurevich

Zhuravlev, Andrey Nikolaevich

1st Prize, Uralski Problemist, 2010

1r6/1b1n3q/3B4/2N4Q/2NkPp2/1p1B3p/1K3p1r/5R1n

#2

8 + 11

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qxd5#
    • 1...Ba6
      • 2.Qd5#
    • 1...Bc8
      • 2.Qd5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sb6
      • 2.Qe5#
    • 1...Sf6
      • 2.Qe5#
    • 1...Sf8
      • 2.Qe5#
  • Tries
    • 1.Be5+?
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Kxc5!
  • Keys
    • 1.Be2!
      • threat
        • 2.Rd1#
      • 1...Qxe4
        • 2.Sxb3#
      • 1...Bxe4
        • 2.Se6#
      • 1...Sxc5
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • B(h);N_GUARD::QAR1(G),XB(h)
    • B(h);N_GUARD::QAR1(G)
    • S(i);N_GUARD::QAB1(G),XS(i)
    • S(i);N_GUARD::QAB1(G)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • S(i);OGATE,XB(H)::QAB1(G),XS(i)
      • Refutation
        • K(f);S_FLIGHT,XS(F)
  • Actual
    • B(C);
    • Threat
      • R(A)
    • Vars
      • Q(j);SBLOCK,XP(E)::S(F),XP(d)
      • B(h);SBLOCK,XP(E)::S(F)
      • S(i);N_GUARD,XS(F)::QAB1(G)
      • S(i);N_GUARD::QAB1(G),XS(i)
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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).