MESON Chess Problem Database

Problem Display
PID: 12037 (2b5/1n2K1p1/2p2Q2/1P2Npp1/3nk1N1/6P1/3R1R2/b1r5 w - - 0 1)

Rudenko, Valentin Fedorovich

1st Prize, Sachove umeni (Ceskoslovensky sach), 1974

2b5/1n2K1p1/2p2Q2/1P2Npp1/3nk1N1/6P1/3R1R2/b1r5

#2

8 + 10

3771 FIDE Album (1974-1976) 1980
4655 Michael Keller Ein Meister der Schachkomposition 1994

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qxc6#
    • 1...Se2
      • 2.Rfxe2#
    • 1...Sb3
      • 2.Rfe2#
    • 1...Sf3
      • 2.Rfe2#
    • 1...Sxb5
      • 2.Rfe2#
    • 1...Se6
      • 2.Rfe2#
      • 2.Qxf5#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Qe6#
      • 1...Sxb5
        • 2.Qxf5#
      • 1...gxf6
        • 2.Sdxf6#
      • 1...Sc2
        • 2.Qxf5#
        • 2.Qxc6#
      • 1...Se2
        • 2.Qxf5#
      • 1...Sb3
        • 2.Qxf5#
      • 1...Sf3
        • 2.Rfe2#
      • 1...Se6
        • 2.Qxf5#
      • 1...Rc5!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Qxc6#
      • 1...Sxb5
        • 2.Qxc6#
      • 1...gxf6
        • 2.Sxf6#
      • 1...Sc2
        • 2.Qxc6#
      • 1...Se2
        • 2.Qxc6#
      • 1...Sb3
        • 2.Qxc6#
      • 1...Sf3
        • 2.Rfe2#
        • 2.Qxc6#
      • 1...Se6
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(c);N_GUARD,S_CUTR(b)::QAB(G),XP(g)
    • S(c);N_GUARD::R(B),XS(c)
    • S(c);N_GUARD::R(B)
    • S(c);N_GUARD,XP(E)::R(B)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(G)
      • Vars
        • K(d);P_SPINS(c),S_FLIGHT::QAB1(G)
        • S(c);N_GUARD,XP(E)::QAB1(G),XP(e)
        • P(i);XQ(G)::S(F),XP(i)
        • S(c);N_GUARD::QAB1(G),XP(e)
        • S(c);N_GUARD,SBLOCK::R(B)
      • Refutation
        • R(b);
  • Actual
    • S(F);
    • Threat
      • QAR1(G)
    • Vars
      • K(d);P_SPINS(c),S_FLIGHT::QAB1(G),XP(g)
      • S(c);N_GUARD,XP(E)::QAB(G),XP(g)
      • P(i);XQ(G)::S(D),XP(i)
      • S(c);N_GUARD::QAB(G),XP(g)
      • S(c);N_GUARD,S_CUTB(j)::QAB1(G),XP(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).