MESON Chess Problem Database

Problem Display
PID: 214690 (1r6/1p2P3/4Kp2/N1k1p1Q1/1RP5/p4B2/1q6/B7 w - - 0 1)

Klark, Dmitry Vasilevich

Vsemirnaya Illustrantiya, 1877

1r6/1p2P3/4Kp2/N1k1p1Q1/1RP5/p4B2/1q6/B7

#2

8 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Rb5#
    • 1...Qd4
      • 2.Rb5#
    • 1...Qa2
      • 2.Rb5#
    • 1...Qc2
      • 2.Rb5#
    • 1...Qd2
      • 2.Rb5#
    • 1...Qe2
      • 2.Rb5#
    • 1...Qf2
      • 2.Rb5#
    • 1...Qg2
      • 2.Rb5#
    • 1...Qh2
      • 2.Rb5#
    • 1...Qxb4
      • 2.Qe3#
      • 2.Qg1#
  • Tries
    • 1.Rb5+?
      • 1...Kd4
        • 2.Qd2#
      • 1...Qxb5!
    • 1.Qe3+?
      • 1...Qd4
        • 2.Rb5#
      • 1...Kxb4!
    • 1.Qg1+?
      • 1...Qd4
        • 2.Rb5#
      • 1...Qf2
        • 2.Rb5#
      • 1...Kxb4!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Qd6#
      • 1...Qxd2
        • 2.Rb5#
      • 1...Qd4
        • 2.Sb3#
        • 2.Rb5#
      • 1...Rd8
        • 2.Sxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::R1(C)
    • Q(a);N_GUARD,P_PINP(D)::R1(C)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(c);N_SPINP(d),P_SPINQ(a),S_FLIGHT::QAR2(F)
      • Refutation
        • Q(a);XR(C)
    • Try
      • Q(F);CHECK,N_PINP(d)
      • Vars
        • Q(a);P_SPINQ(a)::R1(C)
      • Refutation
        • K(c);S_FLIGHT,XR(C)
    • Try
      • Q(F);CHECK,N_PINP(d)
      • Vars
        • Q(a);P_SPINQ(a)::R1(C)
      • Refutation
        • K(c);S_FLIGHT,XR(C)
  • Actual
    • Q(F);N_PINP(d)
    • Threat
      • QAB1(F)
    • Vars
      • Q(a);N_GUARD,XQ(F)::R1(C)
      • R(g);N_GUARD::S(E),XP(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).