MESON Chess Problem Database

Problem Display
PID: 239822 (5R1K/8/2prp3/1p2k1p1/1PPN2Q1/5Pn1/B7/4Bn2 w - - 0 1)

Erokhin, Vladimir Alekseevich

Themes-64, 1979

5R1K/8/2prp3/1p2k1p1/1PPN2Q1/5Pn1/B7/4Bn2

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Bxg3#
    • 1...Sh2
      • 2.Bxg3#
    • 1...Se3
      • 2.Bxg3#
    • 1...Sh1
      • 2.Qe4#
    • 1...Se2
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sf5
      • 2.Qe4#
    • 1...Sh5
      • 2.Qe4#
  • Tries
    • 1.Bc3?
      • threat
        • 2.Sxc6#
      • 1...Rxd4
        • 2.Qxd4#
      • 1...Rd5
        • 2.Qxe6#
      • 1...Rd7
        • 2.Qxe6#
      • 1...Rd8
        • 2.Qxe6#
      • 1...c5
        • 2.Sc6#
      • 1...bxc4!
  • Keys
    • 1.c5!
      • 1...Rxd4
        • 2.Qxe6#
      • 1...Se4
        • 2.Qxe4#
      • 1...Rd5
        • 2.Sxc6#
      • 1...Rd7
        • 2.Sxc6#
      • 1...Rd8
        • 2.Sxc6#
      • 1...Sd2
        • 2.Bxg3#
      • 1...Sh2
        • 2.Bxg3#
      • 1...Se3
        • 2.Bxg3#
      • 1...Sh1
        • 2.Qe4#
      • 1...Se2
        • 2.Qe4#
      • 1...Sf5
        • 2.Qe4#
      • 1...Sh5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::B(A),XS(b)
    • S(b);N_GUARD::QAR1(G)
    • S(b);N_GUARD::QAR1(G),XS(b)
  • Tries
    • Try
      • B(A);
      • Threat
        • B(A)+S(F),DCHECK,XP(f)
      • Vars
        • R(g);OGATE,P_SPINR(g),XS(F)::QAB1(G),XR(g)
        • R(g);N_GUARD::QAR1(G),XP(h)
        • R(g);N_GUARD,P_PINR(H)::QAR1(G),XP(h)
        • P(f);::B(A)+S(F),DCHECK
      • Refutation
        • P(c);XP(E)
  • Actual
    • P(E);
    • Vars
      • R(g);N_GUARD,SBLOCK,XS(F)::QAR1(G),XP(h)
      • S(b);N_GUARD::QAR1(G),XS(b)
      • R(g);N_GUARD::S(F),XP(f)
      • R(g);N_GUARD,P_PINR(H)::S(F),XP(f)
      • S(a);N_GUARD::B(A),XS(b)
      • S(b);N_GUARD::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).