MESON Chess Problem Database

Problem Display
PID: 271330 (8/1p6/1R2Pn1n/3BkpQ1/2PrP1p1/3P2p1/1R4K1/B7 w - - 0 1)

Tkachenko, Sergiy Ivanovich

Comm., Buletin Problemistic, 1995

8/1p6/1R2Pn1n/3BkpQ1/2PrP1p1/3P2p1/1R4K1/B7

#2

10 + 8

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Re2#
    • 1...Rxd5
      • 2.R2b5#
    • 1...Sf7
      • 2.Qxf5#
    • 1...Sg8
      • 2.Qxf5#
  • Tries
    • 1.R2b5?
      • 1...Sxe4
        • 2.Bxe4#
      • 1...Sxd5
        • 2.Rxd5#
      • 1...Sh5
        • 2.Bxb7#
      • 1...Sh7
        • 2.Bxb7#
      • 1...Se8
        • 2.Bxb7#
      • 1...Sfg8
        • 2.Bxb7#
      • 1...Sf7
        • 2.Qxf5#
      • 1...Shg8
        • 2.Qxf5#
      • 1...Sd7!
  • Keys
    • 1.Re2!
      • 1...Sxe4
        • 2.Rxe4#
      • 1...Sxd5
        • 2.exd5#
      • 1...Sh5
        • 2.exf5#
      • 1...Sd7
        • 2.exf5#
      • 1...Sh7
        • 2.exf5#
      • 1...Se8
        • 2.exf5#
      • 1...Sfg8
        • 2.exf5#
      • 1...Sf7
        • 2.Qxf5#
      • 1...Shg8
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • R(b);OGATEB,XP(F)::B(A)+R(B)
    • R(b);OGATEB,XB(G)::B(A)+R(B)
    • S(g);N_GUARD::QAR1(H),XP(e)
  • Tries
    • Try
      • R(B);P_PINR(b)
      • Vars
        • S(f);OGATE,XP(F)::R(B)+B(G),XS(f)
        • S(f);OGATE,P_SPINS(f),XB(G)::R1(B),XS(f)
        • S(f);N_GUARD::R(B)+B(G),XP(h)
        • S(g);N_GUARD::QAR1(H),XP(e)
      • Refutation
        • S(f);
  • Actual
    • R(B);P_PINR(b)
    • Vars
      • S(f);OGATE,P_SPINS(f),XP(F)::R1(B),XS(f)
      • S(f);OGATE,XB(G)::R(B)+P(F),XS(f)
      • S(f);N_GUARD::R(B)+P(F),XP(e)
      • S(g);N_GUARD::QAR1(H),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).