MESON Chess Problem Database

Problem Display
PID: 255857 (3B1K1b/2Q4B/1R1np2p/1p1rk1nR/4pN2/q2pP3/b3N3/5r2 w - - 0 1)

Takacs, Peter

British Chess Magazine, 1933

3B1K1b/2Q4B/1R1np2p/1p1rk1nR/4pN2/q2pP3/b3N3/5r2

#2

9 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf4+
      • 2.exf4#
    • 1...Rd4
      • 2.exd4#
    • 1...Rc5
      • 2.Qxd6#
    • 1...Bg7+
      • 2.Qxg7#
  • Tries
    • 1.Qc3+?
      • 1...Rd4
        • 2.Qxd4#
        • 2.exd4#
      • 1...Qxc3!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qxe6#
      • 1...Rxf4+
        • 2.exf4#
      • 1...Bg7+
        • 2.Qxg7#
      • 1...Rd4
        • 2.exd4#
      • 1...Rc5
        • 2.Qxd6#
      • 1...Sc4
        • 2.Rxe6#
      • 1...Sf5
        • 2.Sg6#
      • 1...Sb7
        • 2.Rxe6#
      • 1...Sf7
        • 2.Rxe6#
      • 1...Sc8
        • 2.Rxe6#
      • 1...Se8
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(a);CHECK,OGATE,XS(C)::P(B),XR(a)
    • R(g);OGATE::P(B),XR(g)
    • R(g);N_GUARD,S_CUTQ(c)::QAB1(F),XS(j)
    • B(m);CHECK,N_GUARD::QAB(F),XB(m)
  • Tries
    • Try
      • Q(F);CHECK
      • Refutation
        • Q(c);XQ(F)
  • Actual
    • Q(F);P_PINP(k)
    • Threat
      • QAR1(F),XP(k)
    • Vars
      • R(a);CHECK,OGATE,XS(C)::P(B),XR(a)
      • B(m);CHECK,N_GUARD::QAB(F),XB(m)
      • R(g);OGATE::P(B),XR(g)
      • R(g);N_GUARD,S_CUTQ(c)::QAB1(F),XS(j)
      • S(j);OGATE,P_PINQ(F)::R1(E),XP(k)
      • S(j);N_PINS(C),N_SPINS(i),P_PINQ(F),SBLOCK::S(C)
      • S(j);N_PINS(C),OGATE,P_PINQ(F)::R1(E),XP(k)
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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).