MESON Chess Problem Database

Problem Display
PID: 201673 (4K3/1Np1P1pN/4k3/1pp1b1Rp/B1R1P2Q/2p3p1/4b3/3rnr2 w - - 0 1)

Bohm, Ferenc

Brisbane Courier, 1922

4K3/1Np1P1pN/4k3/1pp1b1Rp/B1R1P2Q/2p3p1/4b3/3rnr2

#2

9 + 13

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Sxc5#
    • 1...Rd8+
      • 2.exd8S#
    • 1...Rf8+
      • 2.exf8S#
    • 1...Bd6
      • 2.Sd8#
    • 1...Bf6
      • 2.Sf8#
    • 1...Sf3
      • 2.Qh3#
  • Tries
    • 1.Sf8+?
      • 1...Kf6
        • 2.Rf5#
        • 2.Rg6#
      • 1...Rxf8+!
    • 1.Rf5?
      • threat
        • 2.Sg5#
        • 2.Sf8#
      • 1...Rd8+
        • 2.exd8S#
      • 1...Bf4
        • 2.Sf8#
      • 1...Bf6
        • 2.Sf8#
      • 1...Sf3
        • 2.Sf8#
      • 1...g5
        • 2.Sxg5#
        • 2.Sf8#
      • 1...Rxf5!
    • 1.Rg6+?
      • 1...Rf6
        • 2.Sg5#
        • 2.Sf8#
      • 1...Bf6!
    • 1.Qh3+?
      • 1...Rf5
        • 2.Qxf5#
      • 1...Bg4!
  • Keys
    • 1.Rxc5!
      • threat
        • 2.Rcxe5#
        • 2.Rgxe5#
      • 1...Rd8+
        • 2.exd8S#
      • 1...Rf8+
        • 2.exf8S#
      • 1...Rd5
        • 2.exd5#
      • 1...Rf5
        • 2.exf5#
      • 1...Bd4
        • 2.Rc6#
      • 1...Bf4
        • 2.Rg6#
      • 1...Bd6
        • 2.Sd8#
      • 1...Bf6
        • 2.Sf8#
      • 1...Sd3
        • 2.Bb3#
      • 1...Sf3
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(a);SBLOCK::S(F),XP(h)
    • R(a);CHECK,OGATE::PXR(a)=S
    • R(c);CHECK,OGATE::PXR(c)=S
    • B(i);SBLOCK,S_CUTR(a)::S(F)
    • B(i);SBLOCK,S_CUTR(c)::S(H)
    • S(b);S_CUTB(d),S_CUTR(c)::QAB(D)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • R(c);CHECK,XS(H)
    • Try
      • R(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);CHECK,OGATE::PXR(a)=S
        • B(i);::S(H)
        • S(b);::S(H)
      • Refutation
        • R(c);XR(E)
    • Try
      • R(E);CHECK
      • Refutation
        • B(i);P_SPINB(i)
    • Try
      • Q(D);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(D),XR(c)
      • Refutation
        • B(d);P_SPINB(d)
  • Actual
    • R(B);XP(h)
    • Threat
      • DUALS(2)
    • Vars
      • R(a);CHECK,OGATE::PXR(a)=S
      • R(c);CHECK,OGATE::PXR(c)=S
      • R(a);OGATE::P(C),XR(a)
      • R(c);OGATE::P(C),XR(c)
      • B(i);N_GUARD,S_CUTR(a)::R(B)
      • B(i);N_GUARD,S_CUTR(c)::R(E)
      • B(i);SBLOCK,S_CUTR(a)::S(F)
      • B(i);SBLOCK,S_CUTR(c)::S(H)
      • S(b);S_CUTB(d),S_CUTR(a)::B(A)
      • S(b);S_CUTB(d),S_CUTR(c)::QAB(D)
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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).