MESON Chess Problem Database

Problem Display
PID: 203485 (4rr2/1Bp1N1n1/8/8/2K1Pn1R/5k2/2p2b1P/2B2Q2 w - - 0 1)

Jakab, Arpad

Magyar Sakkvilag, 1924

4rr2/1Bp1N1n1/8/8/2K1Pn1R/5k2/2p2b1P/2B2Q2

#2

8 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rg8
      • 2.Rxf4#
    • 1...Rh8
      • 2.Rxf4#
    • 1...Se2
      • 2.Qh1#
    • 1...Sf5
      • 2.Rxf4#
  • Tries
    • 1.e5+?
      • 1...Sd5
        • 2.Bxd5#
      • 1...c6!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Sd4#
      • 1...Kxe4
        • 2.Qd3#
      • 1...Rd8
        • 2.Se5#
      • 1...Se2
        • 2.Qh1#
      • 1...Sfe6
        • 2.Se5#
      • 1...Sf5
        • 2.Rxf4#
      • 1...Sge6
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(h);N_GUARD::R1(F),XS(d)
    • S(d);N_GUARD,SBLOCK::QAB(B)
    • S(f);S_CUTR(h)::R1(F),XS(d)
  • Tries
    • Try
      • P(E);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::B(G),XS(d)
      • Refutation
        • P(e);P_SPINP(e)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(c);N_SPINB(b),P_SPINS(d),S_FLIGHT,XP(E)::QAB1(B)
      • R(g);N_GUARD::S(H)
      • S(d);N_GUARD,SBLOCK::QAB(B)
      • S(d);S_CUTR(g)::S(H)
      • S(f);S_CUTR(h)::R1(F),XS(d)
      • S(f);S_CUTR(g)::S(H)
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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).