MESON Chess Problem Database

Problem Display
PID: 214683 (8/3K1p2/3N1p2/P1kpbN2/Rp1qP3/1p6/3Qp3/3b4 w - - 0 1)

Klark, Dmitry Vasilevich

Shakhmatny Listok, 1878

8/3K1p2/3N1p2/P1kpbN2/Rp1qP3/1p6/3Qp3/3b4

#2

7 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Qxb4#
      • 2.Qxd5#
    • 1...Qg1
      • 2.Qxb4#
      • 2.Qxd5#
    • 1...Qb2
      • 2.Qxb4#
      • 2.Qxd5#
    • 1...Qf2
      • 2.Qxb4#
      • 2.Qxd5#
    • 1...Qc3
      • 2.Qxd5#
    • 1...Qe3
      • 2.Qxb4#
      • 2.Qxd5#
    • 1...Qd3
      • 2.Qxb4#
    • 1...Bh2
      • 2.Qxd4#
    • 1...Bg3
      • 2.Qxd4#
    • 1...Bf4
      • 2.Qxd4#
  • Tries
    • 1.Sb7+?
      • 1...Kc4
        • 2.Rxb4#
      • 1...Kb5!
  • Keys
    • 1.Rxb4!
      • threat
        • 2.Sb7#
        • 2.Rb5#
      • 1...Qxd2
        • 2.Rb5#
      • 1...Qxb4
        • 2.Qxd5#
      • 1...Bxd6
        • 2.Qxd4#
      • 1...dxe4
        • 2.Rb5#
      • 1...Qc3
        • 2.Rb5#
      • 1...Qd3
        • 2.Sb7#
      • 1...Qc4
        • 2.Sb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(e);OGATE::QAR1(A),XP(g)
    • Q(e);N_GUARD::QAB1(A),XP(d)
    • B(h);N_GUARD::QAB1(A),XQ(e)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINP(d)::R1(B),XP(d)
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • R(B);XP(d)
    • Threat
      • DUALS(2)
    • Vars
      • Q(e);XQ(A)::R1(B)
      • Q(e);OGATE,SBLOCK,XR(B)::QAR1(A),XP(g)
      • B(h);N_GUARD,XS(F)::QAB1(A),XQ(e)
      • P(g);P_PINS(F),XP(C)::R1(B)
      • Q(e);::R1(B)
      • Q(e);::S(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).