MESON Chess Problem Database

Problem Display
PID: 213908 (8/rBP1K1p1/p3Q1p1/6NR/Rp2qkPP/4pPp1/8/1bn1B3 w - - 0 1)

Bosak, Juraj

Pal, Julius

Praca, 1952

8/rBP1K1p1/p3Q1p1/6NR/Rp2qkPP/4pPp1/8/1bn1B3

#2

11 + 11

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Sh3#
      • 2.Qd6#
    • 1...Qd3
      • 2.Sh3#
    • 1...Qxf3
      • 2.Sh3#
    • 1...Qf5
      • 2.Sh3#
    • 1...Qxb7
      • 2.Qd6#
    • 1...Qc4
      • 2.Sh3#
      • 2.Qd6#
    • 1...Qd4
      • 2.Sh3#
    • 1...Qe5
      • 2.Sh3#
    • 1...Qxe6+
      • 2.Sxe6#
    • 1...Ba2
      • 2.Qxe4#
    • 1...Sd3
      • 2.Qxe4#
  • Tries
    • 1.Bxe4?
      • threat
        • 2.Sh3#
        • 2.Qd6#
      • 1...Bxe4
        • 2.Qxe4#
        • 2.Qd6#
      • 1...e2
        • 2.Bd2#
      • 1...Sd3
        • 2.Sh3#
      • 1...Rxc7+!
  • Keys
    • 1.Bxb4!
      • threat
        • 2.Bd6#
      • 1...Qxb4+
        • 2.Qd6#
      • 1...Qxe6+
        • 2.Sxe6#
      • 1...e2
        • 2.Bd2#
      • 1...Qe5
        • 2.Sh3#
      • 1...Sd3
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(f);N_PINQ(H),P_SPINP(e)::S(F)
    • Q(f);N_PINQ(H),P_SPINP(e),XP(B)::S(F)
    • Q(f);N_PINQ(H),P_PINP(J),P_SPINP(e),XB(I)::QAB(H)
    • Q(f);N_PINQ(H)::S(F)
    • Q(f);P_SPINP(e)::S(F)
    • Q(f);CHECK,P_SPINP(e),XQ(H)::S(F),XQ(f)
    • B(a);N_GUARD::QAR1(H),XQ(f)
    • S(b);S_CUTB(a)::QAR1(H),XQ(f)
  • Tries
    • Try
      • B(I);N_SPINQ(H),P_SPINP(J),XQ(f)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATEB::B(A)
        • S(b);::S(F)
      • Refutation
        • R(j);CHECK,XP(J)
  • Actual
    • B(A);XP(e)
    • Threat
      • B(A)
    • Vars
      • Q(f);CHECK,N_PINQ(H),P_SPINQ(f),XB(A)::QAB(H)
      • Q(f);CHECK,XQ(H)::S(F),XQ(f)
      • P(c);OGATEB::B(A)
      • Q(f);::S(F)
      • S(b);S_CUTB(a)::QAR1(H),XQ(f)
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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).