MESON Chess Problem Database

Problem Display
PID: 264028 (8/8/3Bp3/5pK1/2b1pn2/4kr1p/1Q3nRN/8 w - - 0 1)

Zaldo Zapirain, Juan

Tijdschrift vd KNSB, 1950

8/8/3Bp3/5pK1/2b1pn2/4kr1p/1Q3nRN/8

#2

5 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3+
      • 2.Rxg3#
    • 1...Bd3
      • 2.Bc5#
    • 1...Sd1
      • 2.Qd2#
    • 1...Sh1
      • 2.Qd2#
    • 1...Sg4
      • 2.Qd2#
    • 1...Sd3
      • 2.Sf1#
  • Tries
    • 1.Sf1+?
      • 1...Kd3
        • 2.Qd2#
      • 1...Bxf1!
    • 1.Bxf4+?
      • 1...Kd3
        • 2.Qd2#
      • 1...Rxf4!
    • 1.Qxf2+?
      • 1...Kd3
        • 2.Qd2#
      • 1...Rxf2!
  • Keys
    • 1.Bb4!
      • threat
        • 2.Qd2#
      • 1...Rg3+
        • 2.Rxg3#
      • 1...Kd3
        • 2.Qd2#
      • 1...Bd3
        • 2.Bc5#
      • 1...S2d3
        • 2.Bd2#
      • 1...S4d3
        • 2.Sf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(c);CHECK,OGATEB::R(B),XR(c)
    • B(e);SBLOCK::B(E)
    • S(a);::QAB1(A)
    • S(g);SBLOCK,S_CUTB(e)::S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • B(e);XS(C)
    • Try
      • B(E);CHECK,XS(g)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • R(c);XB(E)
    • Try
      • Q(A);CHECK,XS(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • R(c);XQ(A)
  • Actual
    • B(E);
    • Threat
      • QAB1(A)
    • Vars
      • R(c);CHECK,OGATEB::R(B),XR(c)
      • K(b);P-FLIGHT::QAR1(A)
      • B(e);SBLOCK::B(E)
      • S(a);SBLOCK::B(E)
      • S(g);SBLOCK,S_CUTB(e)::S(C)
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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).