MESON Chess Problem Database

Problem Display
PID: 171255 (8/2qpR2K/1B2N2p/2p4r/4Np2/2QPk1p1/5b1n/3B1n2 w - - 0 1)

Archakov, Vladimir Mikhailovich

Sachova skladba, 1986

8/2qpR2K/1B2N2p/2p4r/4Np2/2QPk1p1/5b1n/3B1n2

#2

8 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qxd2#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Sc2#
      • 1...cxd4
        • 2.Bxd4#
        • 2.Qxd4#
      • 1...f3!
    • 1.Sxf4?
      • threat
        • 2.Sg2#
      • 1...Qxf4
        • 2.d4#
      • 1...g2
        • 2.Sxg2#
      • 1...Kxf4!
    • 1.Bxc5+?
      • 1...Rxc5
        • 2.Qd4#
      • 1...Qxc5!
    • 1.Qe1+?
      • 1...Kxd3
        • 2.Qe2#
      • 1...Bxe1!
    • 1.Qc1+?
      • 1...Sd2
        • 2.Qxd2#
      • 1...Kxd3!
  • Keys
    • 1.S4xc5!
      • threat
        • 2.d4#
      • 1...Qxc5
        • 2.Sg5#
      • 1...Rxc5
        • 2.Sxc7#
      • 1...Be1
        • 2.Qxe1#
      • 1...Bg1
        • 2.Qe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAB1(B),XS(a)
  • Tries
    • Try
      • S(F);N_PINP(g)
      • Threat
        • S(F)
      • Refutation
        • P(f);
    • Try
      • S(F);XP(f)
      • Threat
        • S(F)
      • Vars
        • Q(j);SBLOCK,XS(F)::QAR(B)+P(C)
        • P(e);::S(F),XP(e)
      • Refutation
        • K(d);N_SPINP(g),S_FLIGHT,XS(F)
    • Try
      • B(E);CHECK,XP(g)
      • Vars
        • R(h);XB(E)::QAB1(B)
      • Refutation
        • Q(j);XB(E)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);N_SPINP(g),P-FLIGHT,XP(C)::QAB1(B)
      • Refutation
        • B(b);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(B),XS(a)
      • Refutation
        • K(d);N_SPINP(g),P-FLIGHT,XP(C)
  • Actual
    • S(D);XP(g)
    • Threat
      • QAR(B)+P(C)
    • Vars
      • Q(j);N_GUARD,P_SPINQ(j),XS(D)::R(G)+S(F)
      • R(h);N_GUARD,P_SPINR(h),XS(D)::R(G)+S(F),XQ(j)
      • B(b);N_GUARD::QAR2(B),XB(b)
      • B(b);N_GUARD::QAR2(B)
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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).