MESON Chess Problem Database

Problem Display
PID: 201675 (1B6/3N4/BP3R1n/1r1kP2K/1q1P4/3R1N2/3P2Q1/8 w - - 0 1)

Bihar, Aladar

Magyar Sakkvilag, 1922

1B6/3N4/BP3R1n/1r1kP2K/1q1P4/3R1N2/3P2Q1/8

#2

12 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Se1#
    • 1...Qxd2
      • 2.Sxd2#
    • 1...Qc4
      • 2.Se1#
      • 2.Sg1#
      • 2.Sh2#
      • 2.Sh4#
      • 2.Sg5#
    • 1...Qxd4
      • 2.Rxd4#
    • 1...Ra5
      • 2.Se1#
      • 2.Sg1#
      • 2.Sh2#
      • 2.Sh4#
      • 2.Sg5#
    • 1...Rc5
      • 2.Se1#
      • 2.Sg1#
      • 2.Sh2#
      • 2.Sh4#
      • 2.Sg5#
    • 1...Rxb6
      • 2.Se1#
      • 2.Sg1#
      • 2.Sh2#
      • 2.Sh4#
      • 2.Sg5#
  • Tries
    • 1.Bxb5?
      • threat
        • 2.Se1#
        • 2.Sg1#
        • 2.Sh2#
        • 2.Sh4#
        • 2.Sg5#
      • 1...Ke4
        • 2.Se1#
        • 2.Sg1#
        • 2.Sh2#
        • 2.Sh4#
        • 2.Sg5#
      • 1...Qxd2
        • 2.Sxd2#
      • 1...Qxb5!
  • Keys
    • 1.e6!
      • threat
        • 2.Sfe5#
      • 1...Kc4+
        • 2.Sfe5#
      • 1...Ke4+
        • 2.Sfe5#
      • 1...Kc6+
        • 2.Sfe5#
      • 1...Qxd2
        • 2.Sxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);P_PINP(F),S_FLIGHT::QAB(B)+S(D)
    • Q(a);XP(A)::QAB(B)+S(D),XQ(a)
    • Q(a);OGATE,P_SPINQ(a),XP(E)::R1(C),XQ(a)
  • Tries
    • Try
      • B(H);XR(b)
      • Threat
        • DUALS(5)
      • Vars
        • Q(a);XP(A)::QAB(B)+S(D),XQ(a)
      • Refutation
        • Q(a);XB(H)
  • Actual
    • P(F);
    • Threat
      • QAB(B)+S(D)
    • Vars
      • K(c);CHECK,P_SPINR(b),S_FLIGHT::S(D)
      • K(c);CHECK,S_FLIGHT::QAB(B)+S(D)
      • K(c);CHECK,S_FLIGHT::QAB(B)+S(D),DCHECK
      • Q(a);XP(A)::QAB(B)+S(D),XQ(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).