MESON Chess Problem Database

Problem Display
PID: 139552 (r3k2r/P1pnpn1p/1p2p3/3NQ3/3R4/7B/8/B1K2R2 w kq - 0 1)

Erokhin, Vladimir Alekseevich

Probleemblad, 1974

r3k2r/P1pnpn1p/1p2p3/3NQ3/3R4/7B/8/B1K2R2

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.Qxh8#
    • 1...Sf8
      • 2.Sxc7#
    • 1...Sd8
      • 2.Sxc7#
    • 1...0-0
      • 2.Sxe7#
    • 1...0-0-0
      • 2.Qxc7#
  • Tries
    • 1.Sxc7+?
      • 1...Kf8
        • 2.Qxh8#
      • 1...Kd8!
    • 1.Qxh8+?
      • 1...Sf8
        • 2.Sxc7#
      • 1...Sxh8!
  • Keys
    • 1.Qxe6!
      • threat
        • 2.Qxe7#
      • 1...Kd8
        • 2.Qxd7#
      • 1...Kf8
        • 2.Qxf7#
      • 1...0-0
        • 2.Rg4#
      • 1...0-0-0
        • 2.a8Q#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(i);P-FLIGHT,P_SPINS(f)::QAR2(G),XR(j)
    • S(d);SBLOCK::S(F),XP(c)
    • S(f);SBLOCK::S(F),XP(c)
    • K(i);0-0::S(F),XP(e)
    • K(i);0-0-0,OGATEB::QAR1(G),XP(c)
  • Tries
    • Try
      • S(F);CHECK,XP(c)
      • Vars
        • K(i);P-FLIGHT,P_SPINS(f)::QAR2(G),XR(j)
      • Refutation
        • K(i);P-FLIGHT,P_SPINS(d)
    • Try
      • Q(G);CHECK,XR(j)
      • Vars
        • S(d);P_SPINS(d)::S(F),XP(c)
      • Refutation
        • S(f);XQ(G)
  • Actual
    • Q(G);P_PINP(e),XP(b)
    • Threat
      • QAR1(G),XP(e)
    • Vars
      • K(i);N_SPINP(e),P-FLIGHT::QAR1(G),XS(d)
      • K(i);N_SPINP(e),P-FLIGHT,P_SPINS(f)::QAR1(G),XS(f)
      • K(i);0-0,N_SPINP(e),OGATEB,P_SPINS(f)::R(E)
      • K(i);0-0-0,N_SPINP(e),OGATE,P_SPINS(d)::P=Q
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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).