MESON Chess Problem Database

Problem Display
PID: 91934 (nBBRNR2/r1n4K/p1p3p1/Q1N1k1P1/2pp4/5b2/4qP2/8 w - - 0 1)

Korepin, Aleksandr

Shakhmaty, 1935

nBBRNR2/r1n4K/p1p3p1/Q1N1k1P1/2pp4/5b2/4qP2/8

#2

10 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Sd3#
    • 1...Bh1
      • 2.f4#
    • 1...Bg2
      • 2.f4#
    • 1...Be4
      • 2.Sd3#
      • 2.f4#
    • 1...Bg4
      • 2.f4#
    • 1...Bd5
      • 2.f4#
    • 1...Bh5
      • 2.f4#
    • 1...d3
      • 2.Qc3#
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sd3#
      • 1...Sb5+
        • 2.Sf7#
      • 1...Sd5+
        • 2.Sf7#
      • 1...Se6+
        • 2.Sd7#
      • 1...Se8+
        • 2.Sf7#
      • 1...Kd5
        • 2.Sf7#
      • 1...d3
        • 2.Sxc4#
      • 1...Bd5
        • 2.f4#
      • 1...Qd3
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • Q(a);SBLOCK::QAR(B)+S(C),DCHECK
    • B(b);OGATE::P(A)
    • P(d);OGATEB::QAB(B)
  • Actual
    • S(I);N_PINS(j)
    • Threat
      • QAR(B)+S(C),DCHECK
    • Vars
      • S(j);CHECK::B(F)+S(I),DCHECK
      • S(j);CHECK,SBLOCK::QAR(B)+S(C),DCHECK
      • K(e);P-FLIGHT::R(H)+S(I)
      • P(d);S_CUTQ(a)::S(I),XP(c)
      • B(b);OGATE,SBLOCK::P(A)
      • Q(a);::QAR(B)+S(C),DCHECK,XQ(a)
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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).