MESON Chess Problem Database

Problem Display
PID: 171992 (1Q1K4/8/1NR1pp2/2P5/3k1PNR/2n5/1rBP4/B1b5 w - - 0 1)

Apro, Laszlo

HM., Magyar Sakkelet, 1965-04

1Q1K4/8/1NR1pp2/2P5/3k1PNR/2n5/1rBP4/B1b5

#2

11 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Bxc3#
      • 2.Qd6#
      • 2.dxc3#
    • 1...Ra2
      • 2.Bxc3#
      • 2.Qd6#
      • 2.dxc3#
    • 1...Rb3
      • 2.Qd6#
    • 1...Rb4
      • 2.Bxc3#
      • 2.Qd6#
      • 2.dxc3#
    • 1...Rb5
      • 2.Bxc3#
      • 2.Qd6#
      • 2.dxc3#
    • 1...Sb1
      • 2.Qd6#
    • 1...Sd1
      • 2.Qd6#
    • 1...Sa2
      • 2.Qd6#
    • 1...Se2
      • 2.Qd6#
    • 1...Sa4
      • 2.Qd6#
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Se5?
      • threat
        • 2.Sf3#
      • 1...Rxc2
        • 2.f5#
      • 1...Rxb6
        • 2.Qd6#
      • 1...fxe5
        • 2.Qxe5#
      • 1...Bxd2!
    • 1.Bxb2?
      • threat
        • 2.Bxc3#
        • 2.Qd6#
        • 2.dxc3#
      • 1...Bxd2
        • 2.Qd6#
      • 1...Bxb2!
  • Keys
    • 1.Sxf6!
      • threat
        • 2.Qe5#
      • 1...Rxc2
        • 2.Qd6#
      • 1...Rxb6
        • 2.f5#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • R(b);P_SPINS(c)::QAR2(J)
    • S(c);N_GUARD,P_SPINR(b)::QAR2(J)
    • P(f);N_GUARD::QAB1(J)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • R(b);P_SPINS(c),XB(B)::R(F)+P(D)
        • R(b);P_SPINS(c),XS(H)::QAR2(J)
        • P(f);OGATE,XS(E)::QAB1(J),XP(f)
      • Refutation
        • B(a);XP(C)
    • Try
      • B(A);P_PINS(c),XR(b)
      • Threat
        • DUALS(3)
      • Vars
        • B(a);XP(C)::QAR2(J)
      • Refutation
        • B(a);N_SPINS(c),XB(A)
  • Actual
    • S(E);XP(f)
    • Threat
      • QAB1(J)
    • Vars
      • R(b);P_SPINS(c),XB(B)::QAR2(J)
      • R(b);P_SPINS(c),XS(H)::R(F)+P(D)
      • P(e);::QAB1(J),XP(e)
HTML5 logo

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).