MESON Chess Problem Database

Problem Display
PID: 106509 (4K3/p1PNp1p1/4kNrp/2P5/2R1P1Pn/4rppQ/B4q2/b1n2b2 w - - 0 1)

Formanek, Bedrich

Praca, 1950

4K3/p1PNp1p1/4kNrp/2P5/2R1P1Pn/4rppQ/B4q2/b1n2b2

#2

10 + 14

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Rxe4#
    • 1...Bxc4
      • 2.Bxc4#
    • 1...Se2
      • 2.Rc3#
    • 1...Sd3
      • 2.Rc2#
    • 1...Sg2
      • 2.g5#
    • 1...Sf5
      • 2.exf5#
      • 2.gxf5#
  • Tries
    • 1.Sh7?
      • threat
        • 2.Shf8#
      • 1...Rxe4
        • 2.Rxe4#
      • 1...Rf6!
    • 1.g5+?
      • 1...Sf5
        • 2.Qxf5#
        • 2.exf5#
      • 1...Bxh3!
  • Keys
    • 1.Sh5!
      • threat
        • 2.Sf4#
      • 1...Rxe4
        • 2.Rxe4#
      • 1...Rf6
        • 2.Sxg7#
      • 1...Be5
        • 2.Sf8#
      • 1...Se2
        • 2.Rc3#
      • 1...Sd3
        • 2.Rc2#
      • 1...Sg2
        • 2.g5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(e);OGATE,XP(D)::B(A)+R(C),DCHECK,XR(e)
    • B(c);OGATE,P_SPINB(c),XR(C)::B(A),XB(c)
    • S(b);N_GUARD,S_CUTB(c),S_CUTQ(d)::B(A)+R(C)
    • S(b);N_GUARD,S_CUTB(c),S_CUTR(e)::B(A)+R(C)
    • S(h);N_GUARD,S_CUTB(c)::QAB(B)+P(E)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • R(e);OGATE,XP(D)::B(A)+R(C),DCHECK,XR(e)
      • Refutation
        • R(j);
    • Try
      • P(E);CHECK
      • Refutation
        • B(c);XQ(B)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • R(e);OGATE,XP(D)::B(A)+R(C),DCHECK,XR(e)
      • R(j);N_GUARD,S_CUTB(a)::S(G),XP(n)
      • B(a);SBLOCK::S(I)
      • S(b);N_GUARD,S_CUTB(c),S_CUTQ(d)::B(A)+R(C)
      • S(b);N_GUARD,S_CUTB(c),S_CUTR(e)::B(A)+R(C)
      • S(h);N_GUARD,S_CUTB(c)::QAB(B)+P(E)
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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).