MESON Chess Problem Database

Problem Display
PID: 245796 (4B3/3R1R1n/r3k3/q5r1/1p2P3/1p1N4/p2KQ3/8 w - - 0 1)

Tkachenko, Sergiy Ivanovich

Schweizerische Schachzeitung, 1993

4B3/3R1R1n/r3k3/q5r1/1p2P3/1p1N4/p2KQ3/8

#2

7 + 8

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.exd5#
    • 1...Qf5
      • 2.exf5#
    • 1...Rd5
      • 2.exd5#
    • 1...Re5
      • 2.Sf4#
    • 1...Rf5
      • 2.exf5#
    • 1...Rd6
      • 2.Rde7#
    • 1...Sf6
      • 2.Rfe7#
  • Keys
    • 1.e5!
      • threat
        • 2.Sf4#
      • 1...Rd6
        • 2.Rxd6#
      • 1...Sf6
        • 2.Rxf6#
      • 1...Qd5
        • 2.Rde7#
      • 1...Rg4
        • 2.Qxg4#
      • 1...Rf5
        • 2.Rfe7#

Anticipated by 18595(1957)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(d);OGATE,P_PINS(C)::QAR(B)+P(D)DCHECK,XQ(d)
    • Q(d);OGATE::QAR(B)+P(D)DCHECK,XQ(d)
    • R(e);OGATE,P_PINS(C)::QAR(B)+P(D)DCHECK,XR(e)
    • R(e);SBLOCK::S(C)
    • R(e);OGATE::QAR(B)+P(D)DCHECK,XR(e)
    • R(f);P_PINS(C),SBLOCK::R1(E)
    • S(h);SBLOCK::R1(F)
  • Actual
    • P(D);
    • Threat
      • S(C)
    • Vars
      • R(f);N_GUARD,P_PINS(C)::R1(E),XR(f)
      • S(h);N_GUARD::R1(F),XS(h)
      • Q(d);P_PINS(C),SBLOCK::R1(E)
      • R(e);N_GUARD::QAB(B),XR(e)
      • R(e);SBLOCK::R1(F)
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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).