MESON Chess Problem Database

Problem Display
PID: 202278 (1BnR4/q2n1B2/2brP2K/Rrpk2p1/6N1/N1pP3p/3b3P/6Q1 w - - 0 1)

Jakab, Arpad

4th Prize, Feuille d'Avis de Lausanne, 1923

1BnR4/q2n1B2/2brP2K/Rrpk2p1/6N1/N1pP3p/3b3P/6Q1

#2

11 + 12

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe6+
      • 2.Sf6#
    • 1...Se5
      • 2.Sf6#
    • 1...Sf6
      • 2.e7#
  • Tries
    • 1.Sxb5?
      • threat
        • 2.Qh1#
      • 1...Rxe6+
        • 2.Sf6#
      • 1...Se5
        • 2.Sf6#
      • 1...Sf6
        • 2.e7#
      • 1...c4
        • 2.Sxc3#
        • 2.Sc7#
      • 1...Bxb5!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Qh1#
      • 1...Rxe6+
        • 2.Sf6#
      • 1...Rb1
        • 2.Qd4#
      • 1...Rb4
        • 2.Sxb4#
      • 1...Se5
        • 2.Sf6#
      • 1...Sf6
        • 2.e7#
      • 1...c4
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(i);CHECK,P_SPINR(i),P_SPINS(k),XP(G)::S(E)
    • S(k);N_GUARD,P_SPINR(i),SBLOCK::S(E)
    • S(k);N_PINP(G),P_SPINR(i)::B(I)+P(G)
  • Tries
    • Try
      • S(C);XR(d)
      • Threat
        • QAB(A)
      • Vars
        • R(i);CHECK,P_SPINR(i),P_SPINS(k),XP(G)::S(E)
        • S(k);N_GUARD,P_SPINR(i),SBLOCK::S(E)
        • S(k);N_PINP(G),P_SPINR(i)::B(I)+P(G)
      • Refutation
        • B(h);XS(C)
  • Actual
    • S(C);
    • Threat
      • QAB(A)
    • Vars
      • R(i);CHECK,P_SPINR(i),P_SPINS(k),XP(G)::S(E)
      • R(d);P_SPINP(e)::QAR1(A)
      • R(d);N_GUARD,P_SPINP(e)::S(C),XR(d)
      • S(k);N_GUARD,P_SPINR(i),SBLOCK::S(E)
      • S(k);N_PINP(G),P_SPINR(i)::B(I)+P(G)
      • P(e);N_GUARD,P_SPINR(d)::S(C)
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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).