MESON Chess Problem Database

Problem Display
PID: 172054 (8/8/5N2/2pQ4/2p1p2p/2k5/6nR/1KN1R2b w - - 0 1)

Apro, Laszlo

L'ud, 1964

8/8/5N2/2pQ4/2p1p2p/2k5/6nR/1KN1R2b

#2

6 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe1
      • 2.Qd2#
    • 1...Se3
      • 2.Qd2#
    • 1...Sf4
      • 2.Qd2#
  • Tries
    • 1.Re3+?
      • 1...Sxe3
        • 2.Qd2#
      • 1...Kb4!
    • 1.Rxe4?
      • threat
        • 2.Rxc4#
      • 1...Se3
        • 2.Qd2#
      • 1...Kb4!
    • 1.Qd1?
      • threat
        • 2.Sa2#
        • 2.Sd5#
      • 1...Se3
        • 2.Sa2#
        • 2.Qd2#
      • 1...Sf4
        • 2.Sa2#
        • 2.Qd2#
      • 1...Kb4!
  • Keys
    • 1.Qxc5!
      • threat
        • 2.Sxe4#
      • 1...Kd2
        • 2.Qe3#
      • 1...Sxe1
        • 2.Sd5#
      • 1...e3
        • 2.Se4#
      • 1...Se3
        • 2.Rxe3#
      • 1...Sf4
        • 2.Rc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);XR(C)::QAB1(E)
    • S(b);::QAB1(E)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • S(b);XR(C)::QAB1(E)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(C);XP(e)
      • Threat
        • R1(C),XP(d)
      • Vars
        • S(b);::QAB1(E)
      • Refutation
        • K(c);P_SPINP(d),S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(E);P_PINP(d),XP(g)
    • Threat
      • S(F),XP(e)
    • Vars
      • K(c);N_SPINP(d),P_SPINS(b),S_FLIGHT::QAB1(E)
      • S(b);XR(C)::S(F)
      • P(e);::S(F)
      • S(b);N_GUARD::R(C),XS(b)
      • S(b);OGATE::R1(D)
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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).