MESON Chess Problem Database

Problem Display
PID: 198825 (3n1Q2/1R6/pn6/rrP2N1K/1k6/p1NPP3/P7/4B3 w - - 0 1)

Jakab, Arpad

Schweizerische Schachzeitung, 1921

3n1Q2/1R6/pn6/rrP2N1K/1k6/p1NPP3/P7/4B3

#2

10 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Sb1#
      • 2.Sd1#
      • 2.Se2#
      • 2.Se4#
      • 2.Sd5#
    • 1...Sa4
      • 2.Sd5#
    • 1...Sa8
      • 2.c6#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Sc2#
      • 1...Ra4
        • 2.Sb1#
        • 2.Sd1#
        • 2.Sce2#
        • 2.Se4#
        • 2.Scxb5#
        • 2.Sd5#
      • 1...Rxc5+!
  • Keys
    • 1.Se7!
      • 1...Rxc5+
        • 2.Sed5#
      • 1...Kxc5
        • 2.Se4#
      • 1...Sxb7
        • 2.Sc6#
      • 1...Ra4
        • 2.Se4#
      • 1...Sa4
        • 2.Sed5#
      • 1...Sc4
        • 2.Sed5#
      • 1...Sd5
        • 2.Sexd5#
      • 1...Sd7
        • 2.Sed5#
      • 1...Sa8
        • 2.Sed5#
      • 1...Sc8
        • 2.Sed5#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Se6
        • 2.Sc6#
      • 1...Sf7
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • S(f);P_SPINR(d),SBLOCK::B(A)+S(C),DCHECK
    • S(f);P_SPINR(d)::QAB(J)+P(F)
  • Tries
    • Try
      • S(G);P_SPINP(F)
      • Threat
        • S(G)
      • Refutation
        • R(d);CHECK,P_SPINR(d),P_SPINS(f),XP(F)
  • Actual
    • S(G);P_SPINP(F)
    • Vars
      • R(d);CHECK,P_SPINS(f),XP(F)::S(G)
      • K(b);S_FLIGHT,XP(F)::S(C)
      • S(g);N_GUARD,XR(I)::S(G)
      • R(c);SBLOCK::B(A)+S(C)
      • S(f);N_GUARD,P_SPINR(d)::S(G)
      • S(f);N_GUARD,N_PINP(F),P_SPINR(d)::S(G),XS(f)
      • S(g);N_GUARD::S(G),XS(g)
      • S(g);N_GUARD::S(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).