MESON Chess Problem Database

Problem Display
PID: 206601 (1nN2b2/1p4p1/1Pk1B1b1/P1p2pN1/2P1r3/8/6Q1/7K w - - 0 1)

Sokolenko, Timofei

2nd Prize, 64 Shakhmatnoe obozrenie, 1925

1nN2b2/1p4p1/1Pk1B1b1/P1p2pN1/2P1r3/8/6Q1/7K

#2

8 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.Sa7#
    • 1...Sd7
      • 2.Bd5#
  • Tries
    • 1.Sxe4?
      • threat
        • 2.Sd2#
        • 2.Sf2#
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sg5#
        • 2.Sed6#
        • 2.Sf6#
        • 2.Sa7#
      • 1...Bh5
        • 2.Sa7#
      • 1...Bd6
        • 2.Sd2#
        • 2.Sf2#
        • 2.Sc3#
        • 2.Sg3#
        • 2.Sg5#
        • 2.Sexd6#
        • 2.Sf6#
        • 2.Sa7#
      • 1...f4
        • 2.Sa7#
      • 1...fxe4!
    • 1.Sf7?
      • threat
        • 2.Se5#
        • 2.Sd8#
        • 2.Sa7#
      • 1...Bd6
        • 2.Sd8#
        • 2.Sa7#
      • 1...Be7
        • 2.Se5#
        • 2.Sa7#
        • 2.Sxe7#
      • 1...Sd7
        • 2.Sd8#
        • 2.Sa7#
        • 2.Bd5#
      • 1...Bxf7!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Se5#
      • 1...Re1+
        • 2.Sxe1#
      • 1...Rh4+
        • 2.Sxh4#
      • 1...Rxc4
        • 2.Sd4#
      • 1...Re5
        • 2.Sd4#
        • 2.Sxe5#
      • 1...Bd6
        • 2.Sa7#
      • 1...Sd7
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(i);SBLOCK::S(H)
    • S(h);SBLOCK::B(G)
  • Tries
    • Try
      • S(E);XR(a)
      • Threat
        • DUALS(8)
      • Vars
        • B(e);::S(H)
        • P(c);::S(H)
      • Refutation
        • P(c);P_SPINP(c),XS(E)
    • Try
      • S(E);
      • Threat
        • DUALS(3)
      • Refutation
        • B(e);XS(E)
  • Actual
    • S(E);N_PINR(a)
    • Threat
      • S(E)
    • Vars
      • R(a);CHECK::QAB(B)+S(E),XR(a)
      • R(a);XP(C)::QAB(B)+S(E),DCHECK
      • B(i);SBLOCK::S(H)
      • S(h);SBLOCK::B(G)
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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).