MESON Chess Problem Database

Problem Display
PID: 180402 (8/8/3Q4/4BK2/2PRP1N1/2r2k1p/2N1r1b1/2bB1q2 w - - 0 1)

Lider, Valentin Viktorovich

Revista Romana de Sah, 1983

8/8/3Q4/4BK2/2PRP1N1/2r2k1p/2N1r1b1/2bB1q2

#2

9 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Sxe1#
    • 1...Qf2
      • 2.Sh2#
  • Tries
    • 1.Rd2?
      • threat
        • 2.Sd4#
      • 1...Rxc2
        • 2.Qd3#
      • 1...Rxc4
        • 2.Qd3#
      • 1...Qg1
        • 2.Bxe2#
      • 1...Qf2
        • 2.Sh2#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Bh1!
    • 1.Rd3+?
      • 1...Be3
        • 2.Sd4#
      • 1...Rxd3!
  • Keys
    • 1.Bh2!
      • threat
        • 2.Qg3#
      • 1...Qe1
        • 2.Sxe1#
      • 1...Qf2
        • 2.Se5#
      • 1...Bf4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_GUARD::S(B),XQ(b)
    • Q(b);SBLOCK::S(F)
  • Tries
    • Try
      • R(D);
      • Threat
        • S(B)
      • Vars
        • R(e);N_GUARD,XS(B)::QAR2(I)
        • R(e);N_GUARD,XP(C)::QAR2(I)
        • Q(b);N_GUARD::B(A),XR(c)
        • Q(b);SBLOCK::S(F)
        • R(e);N_GUARD::QAR2(I),XR(e)
      • Refutation
        • B(d);
    • Try
      • R(D);CHECK
      • Vars
        • B(a);P_SPINB(a)::S(B)
      • Refutation
        • R(e);XR(D)
  • Actual
    • B(G);
    • Threat
      • QAR1(I)
    • Vars
      • Q(b);N_GUARD::S(B),XQ(b)
      • Q(b);SBLOCK::S(F)
      • B(a);N_GUARD::QAR1(I),XB(a)
HTML5 logo

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).