MESON Chess Problem Database

Problem Display
PID: 157117 (2b5/8/5nN1/1R1B4/2Pkpr2/pK1p1p2/3Q4/6N1 w - - 0 1)

Lukashev, Viktor Sergeevich

Best Problems, 2007

2b5/8/5nN1/1R1B4/2Pkpr2/pK1p1p2/3Q4/6N1

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd5
      • 2.Rxd5#
    • 1...f2
      • 2.Se2#
    • 1...e3
      • 2.Qc3#
  • Tries
    • 1.Sxf3+?
      • 1...exf3
        • 2.Qf2#
      • 1...Rxf3!
    • 1.Qxf4?
      • threat
        • 2.Sxf3#
      • 1...d2
        • 2.Qxd2#
      • 1...f2
        • 2.Sf3#
      • 1...Bg4!
  • Keys
    • 1.Bxe4!
      • threat
        • 2.Qxd3#
      • 1...Kxe4
        • 2.Qxf4#
      • 1...Rxe4
        • 2.Sxf3#
      • 1...Sxe4
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(g);OGATE,XB(F)::R1(E),XS(g)
    • P(c);N_GUARD::S(A)
    • P(e);SBLOCK::QAB1(B)
  • Tries
    • Try
      • S(A);CHECK,XP(c)
      • Vars
        • P(e);XS(A)::QAB(B)
      • Refutation
        • R(f);XS(A)
    • Try
      • Q(B);N_PINP(b),P_PINP(e),XR(f)
      • Threat
        • S(A),XP(c)
      • Vars
        • P(b);OGATEB::QAR2(B),XP(b)
        • P(c);::S(A)
      • Refutation
        • B(h);
  • Actual
    • B(F);XP(e)
    • Threat
      • QAR1(B),XP(b)
    • Vars
      • K(d);N_SPINP(b),OGATEB,P-FLIGHT,XB(F)::QAR1(B),XR(f)
      • R(f);N_GUARD,SBLOCK,XB(F)::S(A),XP(c)
      • S(g);N_GUARD,SBLOCK,XB(F)::R1(E)
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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).