MESON Chess Problem Database

Problem Display
PID: 86935 (3B1Nqr/4R3/8/r5nn/3N2Pk/3bpB2/6QK/8 w - - 0 1)

Vasilenko, Anatoly Grigorovich

White-100 JT, 1980-1981

3B1Nqr/4R3/8/r5nn/3N2Pk/3bpB2/6QK/8

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bb5
      • 2.Sf5#
    • 1...Sxf3+
      • 2.Sxf3#
    • 1...Sg3
      • 2.Qxg3#
    • 1...Sf4
      • 2.Qg3#
    • 1...Sf6
      • 2.Qg3#
    • 1...Sg7
      • 2.Qg3#
  • Tries
    • 1.Re5?
      • threat
        • 2.Qh3#
      • 1...Qa2
        • 2.Bxg5#
      • 1...Bf1
        • 2.Sf5#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Ra2!
    • 1.Rg7?
      • threat
        • 2.Qh3#
      • 1...Ra2
        • 2.Bxg5#
      • 1...Bf1
        • 2.Sg6#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Qa2!
    • 1.Qf2+?
      • 1...Sg3
        • 2.Qxg3#
      • 1...exf2!
  • Keys
    • 1.Re4!
      • threat
        • 2.Qh3#
      • 1...Qa2
        • 2.Sg6#
      • 1...Ra2
        • 2.Sf5#
      • 1...Bf1
        • 2.gxh5#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD,S_CUTR(d)::S(D)
    • S(e);CHECK,XB(C)::S(D),XS(e)
    • S(f);N_GUARD::QAB1(A),XS(f)
    • S(f);N_GUARD::QAB1(A)
  • Tries
    • Try
      • R(F);P_PINS(e)
      • Threat
        • QAR1(A)
      • Vars
        • Q(g);N_GUARD,P_PINQ(A)::B(G),XS(e)
        • B(a);N_GUARD::S(D)
        • S(f);N_GUARD::QAB1(A)
        • S(f);N_GUARD,N_SPINS(e)::QAB1(A)
      • Refutation
        • R(d);P_PINQ(A)
    • Try
      • R(F);P_PINS(e)
      • Threat
        • QAR1(A)
      • Vars
        • R(d);N_GUARD,P_PINQ(A)::B(G),XS(e)
        • B(a);N_GUARD::S(H)
        • S(f);N_GUARD::QAB1(A)
        • S(f);N_GUARD,N_SPINS(e)::QAB1(A)
      • Refutation
        • Q(g);P_PINQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(A),XS(f)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • R(F);P_PINS(e)
    • Threat
      • QAR1(A)
    • Vars
      • Q(g);N_GUARD,P_PINQ(A)::S(H)
      • R(d);N_GUARD,P_PINQ(A)::S(D)
      • B(a);N_GUARD::R(F)+P(E),XS(f)
      • S(f);N_GUARD::QAB1(A)
      • S(f);N_GUARD,N_SPINS(e)::QAB1(A)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).