MESON Chess Problem Database

Problem Display
PID: 189617 (B7/B1p2K2/p1rp1P2/3Npp2/4k3/1P2ppP1/nQP5/8 w - - 0 1)

Fridrich, Jeno

Pesti Naplo, 1911

B7/B1p2K2/p1rp1P2/3Npp2/4k3/1P2ppP1/nQP5/8

#2

9 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Qxc2#
    • 1...Rc3
      • 2.Sxc3#
    • 1...Rc4
      • 2.Sc3#
    • 1...Sc1
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...Sb4
      • 2.Sc3#
  • Tries
    • 1.Bxc6?
      • threat
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...f4!
  • Keys
    • 1.Qb1!
      • threat
        • 2.c4#
      • 1...Kxd5
        • 2.c4#
      • 1...Rxc2
        • 2.Qxc2#
      • 1...f2
        • 2.Qh1#
      • 1...Sc1
        • 2.Sc3#
      • 1...Rc3
        • 2.Sxc3#
      • 1...Rc4
        • 2.Sc3#
        • 2.c3#
      • 1...Rc5
        • 2.c3#
      • 1...Rb6
        • 2.c3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Sb4
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(h);OGATE,XP(B)::QAB(A),XR(h)
    • R(h);::B(I)+S(E),DCHECK,XR(h)
    • R(h);::B(I)+S(E),DCHECK
    • S(a);N_GUARD::S(E)
    • S(a);N_GUARD::S(E),XS(a)
  • Tries
    • Try
      • B(I);XR(h)
      • Threat
        • B(I)+S(E),DCHECK
      • Vars
        • S(a);::B(I)+S(E),DCHECK,XS(a)
      • Refutation
        • P(f);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+P(B)
    • Vars
      • K(d);P_SPINR(h),S_FLIGHT,XS(E)::P(B)
      • R(h);OGATE,P_SPINR(h),XP(B)::QAB(A),XR(h)
      • P(c);OGATEB::QAB(A)
      • S(a);N_GUARD::S(E)
      • R(h);::B(I)+S(E),DCHECK,XR(h)
      • R(h);::QAB(A)+P(B)
      • S(a);N_GUARD::S(E),XS(a)
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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).