MESON Chess Problem Database

Problem Display
PID: 202534 (2R5/8/rpK3Q1/1N1N2b1/2k3rp/2p4B/P5P1/4n3 w - - 0 1)

Jakab, Arpad

Uj Nemezdek, 1923

2R5/8/rpK3Q1/1N1N2b1/2k3rp/2p4B/P5P1/4n3

#2

8 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg2
      • 2.Qe4#
    • 1...Rg3
      • 2.Qe4#
    • 1...Rd4
      • 2.Sd6#
    • 1...Re4
      • 2.Qxe4#
    • 1...Bf4
      • 2.Qe4#
  • Tries
    • 1.Kb7+?
      • 1...Kxd5
        • 2.Qf5#
      • 1...Kxb5!
    • 1.Kd7+?
      • 1...Kxd5
        • 2.Qf5#
        • 2.Qe6#
      • 1...Kxb5!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Kd6#
      • 1...Sc2
        • 2.Qf1#
      • 1...c2
        • 2.Qb3#
      • 1...Ra7
        • 2.Sxb6#
      • 1...Ra8
        • 2.Sxb6#
      • 1...Be3
        • 2.Sxe3#
      • 1...Bf4
        • 2.Qe4#
      • 1...Be7
        • 2.Se3#
      • 1...Bd8
        • 2.Se3#
      • 1...Sd3
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • R(d);N_GUARD,XP(B)::QAR2(G)
    • R(d);N_GUARD::QAR2(G)
    • R(d);SBLOCK::S(D)
    • R(d);N_GUARD::QAR2(G),XR(d)
    • B(f);S_CUTR(d)::QAR2(G)
  • Tries
    • Try
      • K(F);CHECK,S_FLIGHT
      • Vars
        • K(c);S_FLIGHT,XS(E)::QAR2(G)
      • Refutation
        • K(c);S_FLIGHT,XS(D)
    • Try
      • K(F);CHECK,S_FLIGHT
      • Refutation
        • K(c);S_FLIGHT,XS(D)
  • Actual
    • Q(G);
    • Threat
      • R(H)+K(F)
    • Vars
      • S(a);OGATE::QAB(G)
      • P(b);::QAB1(G)
      • R(g);N_GUARD::S(E),XP(h)
      • B(f);N_GUARD::S(E),XB(f)
      • B(f);S_CUTR(d)::QAR2(G)
      • B(f);N_GUARD::S(E)
      • S(a);SBLOCK::QAB1(G)
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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).