MESON Chess Problem Database

Problem Display
PID: 263967 (1K1N4/1p5r/1p5p/bpkn1N1R/R1n2p1B/P4B2/bP3P2/8 w - - 0 1)

Rudenko, Valentin Fedorovich

4th HM., Tijdschrift vd KNSB, 1959

1K1N4/1p5r/1p5p/bpkn1N1R/R1n2p1B/P4B2/bP3P2/8

#2

10 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Se6#
    • 1...Se3
      • 2.Se6#
    • 1...Sb4
      • 2.Se6#
    • 1...Sf6
      • 2.Se6#
    • 1...Sc7
      • 2.Sxb7#
    • 1...Se7
      • 2.Se6#
      • 2.Sxb7#
  • Tries
    • 1.Sg7?
      • threat
        • 2.Rxd5#
      • 1...Kd4
        • 2.Rxd5#
      • 1...Kd6
        • 2.Rxd5#
      • 1...Sxb2
        • 2.Be7#
      • 1...Sxa3
        • 2.Be7#
      • 1...Sd2
        • 2.Be7#
      • 1...Se3
        • 2.Be7#
      • 1...Sd6
        • 2.Sge6#
      • 1...Se5!
    • 1.Be7+?
      • 1...Sd6
        • 2.Bxd6#
      • 1...Sxe7
        • 2.Se6#
        • 2.Sxb7#
      • 1...Rxe7!
    • 1.b4+?
      • 1...Sxb4
        • 2.Se6#
      • 1...Bxb4!
  • Keys
    • 1.Se7!
      • threat
        • 2.Rxd5#
      • 1...Kd4
        • 2.Rxd5#
      • 1...Kd6
        • 2.Rxd5#
      • 1...Sxb2
        • 2.Sxb7#
      • 1...Sxa3
        • 2.Sxb7#
      • 1...Sd2
        • 2.Sxb7#
      • 1...Se3
        • 2.Sxb7#
      • 1...Se5
        • 2.Sxb7#
      • 1...Sd6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 5
  • Sets
    • S(g);::S(J)
    • S(g);S_CUTR(k)::S(J),XP(j)
  • Tries
    • Try
      • S(G);P_PINS(g)
      • Threat
        • R1(H),XS(g)
      • Vars
        • K(f);N_SPINS(g),P_SPINS(b),S_FLIGHT::R1(H),XS(g)
        • K(f);N_SPINS(g),S_FLIGHT::R1(H),XS(g)
        • S(b);N_GUARD,XP(A)::B(F)
        • S(b);N_GUARD,XP(C)::B(F)
        • S(b);N_GUARD::B(F)
        • S(b);SBLOCK::S(G)
      • Refutation
        • S(b);N_SPINS(g)
    • Try
      • B(F);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::B(F),XS(b)
      • Refutation
        • R(k);XB(F)
    • Try
      • P(A);CHECK
      • Vars
        • S(g);XP(A)::S(J)
      • Refutation
        • B(d);XP(A)
  • Actual
    • S(G);P_PINS(g)
    • Threat
      • R1(H),XS(g)
    • Vars
      • K(f);N_SPINS(g),P_SPINS(b),S_FLIGHT::R1(H),XS(g)
      • K(f);N_SPINS(g),S_FLIGHT::R1(H),XS(g)
      • S(b);XP(A)::S(J),XP(j)
      • S(b);XP(C)::S(J),XP(j)
      • S(b);::S(J),XP(j)
      • S(b);N_SPINS(g)::S(J),XP(j)
      • S(b);SBLOCK::S(J)
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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).