MESON Chess Problem Database

Problem Display
PID: 102461 (5R2/5n2/2N2b2/1r4p1/q2p2R1/pp2NkpB/1n3rb1/K3Q3 w - - 0 1)

Wielgos, Oskar

Europe Echecs, 1963

5R2/5n2/2N2b2/1r4p1/q2p2R1/pp2NkpB/1n3rb1/K3Q3

#2

7 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Bxg2#
    • 1...Re2
      • 2.Qxg3#
    • 1...Se5
      • 2.Rxf6#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Qe4#
      • 1...Re5
        • 2.Sxd4#
      • 1...Rf1
        • 2.Sd2#
      • 1...Rd2
        • 2.Sxd2#
      • 1...Re2
        • 2.Qxg3#
      • 1...Sd6
        • 2.Sxd4#
      • 1...Rc2!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Qe4#
      • 1...Rf1
        • 2.Rxg3#
      • 1...Rc2
        • 2.Rxg3#
      • 1...Rd2
        • 2.Rxg3#
      • 1...Re2
        • 2.Qxg3#
      • 1...Sd6
        • 2.Se5#
      • 1...d3
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(b);N_GUARD,P_PINQ(B)::B(D),XB(c)
    • R(b);OGATE,SBLOCK::QAR1(B),XP(g)
    • S(m);OGATE,P_SPINB(l)::R(G),XB(l)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(B)
      • Vars
        • R(j);S_CUTB(l)::S(F),XP(i)
        • R(b);N_GUARD,P_PINQ(B)::S(C)
        • R(b);N_GUARD::S(C),XR(b)
        • R(b);OGATE,SBLOCK::QAR1(B),XP(g)
        • S(m);P_SPINB(l)::S(F),XP(i)
      • Refutation
        • R(b);
  • Actual
    • S(C);
    • Threat
      • QAB1(B)
    • Vars
      • R(b);P_PINQ(B)::R1(E),XP(g)
      • R(b);::R1(E),XP(g)
      • R(b);OGATE,SBLOCK::QAR1(B),XP(g)
      • S(m);N_GUARD,P_SPINB(l)::S(F)
      • P(i);N_GUARD::QAR1(B)
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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).