MESON Chess Problem Database

Problem Display
PID: 42660 (2R2N2/5p2/K2p1n2/p5Q1/2pkp1p1/1prN4/1B2P3/7B w - - 0 1)

Pilchenko, Viacheslav Karlovich

Shavirin, Valery Mikhailovich

2nd HM., 64 Shakhmatnoe obozrenie, 1979

2R2N2/5p2/K2p1n2/p5Q1/2pkp1p1/1prN4/1B2P3/7B

#2

8 + 10

3750 FIDE Album (1977-1979) 1984
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...cxd3
      • 2.Bxc3#
      • 2.e3#
    • 1...exd3
      • 2.e3#
    • 1...e3
      • 2.Qxf6#
  • Tries
    • 1.Kb5?
      • threat
        • 2.Rxc4#
      • 1...cxd3
        • 2.Bxc3#
        • 2.Rc4#
        • 2.e3#
      • 1...d5!
    • 1.Sc1?
      • threat
        • 2.e3#
      • 1...e3
        • 2.Qxf6#
      • 1...Sd5!
    • 1.Se1?
      • threat
        • 2.e3#
      • 1...e3
        • 2.Qxf6#
      • 1...Sd5!
    • 1.Sf2?
      • threat
        • 2.e3#
      • 1...e3
        • 2.Qxf6#
      • 1...Sd5!
    • 1.Sc5?
      • threat
        • 2.e3#
      • 1...dxc5
        • 2.Qxc5#
      • 1...e3
        • 2.Qxf6#
      • 1...Sd5!
    • 1.Qxf6+?
      • 1...Kd5
        • 2.Sf4#
      • 1...Ke3!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sc6#
      • 1...Kd5
        • 2.Sf3#
        • 2.Sc6#
      • 1...dxe5
        • 2.Qd2#
      • 1...Sd5
        • 2.Rxc4#
      • 1...d5
        • 2.e3#

Anticipated by 63656(1975)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • P(e);SBLOCK,XS(D)::P(C)
    • P(e);SBLOCK::QAB(E),XS(i)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Threat
        • R1(G),XP(c)
      • Refutation
        • P(h);
    • Try
      • S(D);
      • Threat
        • P(C)
      • Vars
        • P(e);SBLOCK::QAB(E),XS(i)
      • Refutation
        • S(i);
    • Try
      • S(D);
      • Threat
        • P(C)
      • Vars
        • P(e);SBLOCK::QAB(E),XS(i)
      • Refutation
        • S(i);
    • Try
      • S(D);
      • Threat
        • P(C)
      • Vars
        • P(e);SBLOCK::QAB(E),XS(i)
      • Refutation
        • S(i);
    • Try
      • S(D);
      • Threat
        • P(C)
      • Vars
        • P(h);OGATE,XS(D)::QAB1(E),XP(h)
        • P(e);SBLOCK::QAB(E),XS(i)
      • Refutation
        • S(i);
    • Try
      • Q(E);CHECK,XS(i)
      • Vars
        • K(d);N_SPINR(b),P-FLIGHT,P_SPINP(e)::S(D)
      • Refutation
        • K(d);N_SPINR(b),S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • P(h);SBLOCK,XS(D)::QAR2(E)
      • S(i);SBLOCK::R1(G),XP(c)
      • P(h);SBLOCK::P(C)
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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).