MESON Chess Problem Database

Problem Display
PID: 225386 (3R1R2/4p3/K1p1k1p1/1Np3Q1/5bb1/8/2pprpn1/3B1q2 w - - 0 1)

Belcak, Ladislav

Praca, 1955

3R1R2/4p3/K1p1k1p1/1Np3Q1/5bb1/8/2pprpn1/3B1q2

#2

6 + 13

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Bxg4#
    • 1...Re3
      • 2.Bxg4#
    • 1...Re4
      • 2.Bxg4#
    • 1...Re5
      • 2.Qxg6#
    • 1...Be3
      • 2.Sc7#
    • 1...Be5
      • 2.Qxg4#
    • 1...Bc7
      • 2.Sxc7#
    • 1...c4
      • 2.Sd4#
    • 1...cxb5
      • 2.Qd5#
  • Keys
    • 1.Qxc5!
      • threat
        • 2.Sd4#
      • 1...cxb5
        • 2.Qd5#
      • 1...Re1
        • 2.Bxg4#
      • 1...Re3
        • 2.Bxg4#
      • 1...Re4
        • 2.Bxg4#
      • 1...Re5
        • 2.Qxc6#
      • 1...Be3
        • 2.Sc7#
      • 1...Be5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • R(d);OGATE,P_PINS(B)::B(A),XB(h)
    • R(d);P_PINS(B),SBLOCK::QAR2(C),XP(l)
    • B(g);N_GUARD::S(B)
    • B(g);SBLOCK::QAB(C),XB(h)
    • B(g);N_GUARD::S(B),XB(g)
    • P(i);N_GUARD::S(B)
    • P(j);N_GUARD,XS(B)::QAB1(C)
  • Actual
    • Q(C);XP(i)
    • Threat
      • S(B)
    • Vars
      • P(j);N_GUARD,XS(B)::QAB1(C)
      • R(d);OGATE,P_PINS(B)::B(A),XB(h)
      • R(d);P_PINS(B),SBLOCK,S_CUTB(g)::QAR2(C),XP(j)
      • B(g);N_GUARD::S(B)
      • B(g);SBLOCK::QAB(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).