MESON Chess Problem Database

Problem Display
PID: 107578 (2B5/5n1q/K3NprN/3kP3/2R2bnr/BPP1p3/Q3p2p/7b w - - 0 1)

Apro, Laszlo

BCF, 1952-1953

2B5/5n1q/K3NprN/3kP3/2R2bnr/BPP1p3/Q3p2p/7b

#2

10 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Rc5#
    • 1...Sgxe5
      • 2.Sc7#
    • 1...Sfxe5
      • 2.Sxf4#
  • Tries
    • 1.Rd4+?
      • 1...Kc6
        • 2.Bb7#
        • 2.Bd7#
      • 1...Kxe5!
    • 1.Qc2?
      • threat
        • 2.Rc5#
      • 1...Kxe5
        • 2.Qf5#
      • 1...Sgxe5
        • 2.Sc7#
      • 1...Sfxe5
        • 2.Sxf4#
      • 1...fxe5
        • 2.Qd3#
      • 1...Bxe5!
    • 1.Qd2+?
      • 1...Kxe5
        • 2.Qd4#
      • 1...exd2!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Rc5#
      • 1...Kxe5
        • 2.Qf5#
      • 1...Bxe5
        • 2.Qxh1#
      • 1...Sgxe5
        • 2.Sc7#
      • 1...Sfxe5
        • 2.Sxf4#
      • 1...fxe5
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(a);SBLOCK::R1(E)
    • S(f);SBLOCK,XP(F)::S(H)
    • S(k);SBLOCK,XP(F)::S(H),XB(e)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • K(h);P-FLIGHT,XP(F)
    • Try
      • Q(A);
      • Threat
        • R1(E)
      • Vars
        • K(h);OGATEB,P-FLIGHT,XP(F)::QAR1(A)
        • S(f);SBLOCK,XP(F)::S(H)
        • S(k);SBLOCK,XP(F)::S(H),XB(e)
        • P(i);P_PINS(H),SBLOCK,XP(F)::QAR2(A)
      • Refutation
        • B(e);XP(F)
    • Try
      • Q(A);CHECK
      • Vars
        • K(h);P-FLIGHT,XP(F)::QAB1(A)
      • Refutation
        • P(d);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • R1(E)
    • Vars
      • K(h);OGATEB,P-FLIGHT,XP(F)::QAR1(A)
      • B(e);SBLOCK,XP(F)::QAB(A),XB(a)
      • S(f);SBLOCK,XP(F)::S(H)
      • S(k);SBLOCK,XP(F)::S(H),XB(e)
      • P(i);P_PINS(H),SBLOCK,XP(F)::QAR2(A)
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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).