MESON Chess Problem Database

Problem Display
PID: 202441 (3br3/1qprkN1P/R2N3Q/5p2/3pB2n/8/5K2/1b2R3 w - - 0 1)

Hartong, Jan

Rostra Gymnasiorum, 1923

3br3/1qprkN1P/R2N3Q/5p2/3pB2n/8/5K2/1b2R3

#2

8 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa6
      • 2.Bd3#
    • 1...Qc8
      • 2.Bxb1#
      • 2.Bc2#
      • 2.Bd3#
    • 1...Qb2+
      • 2.Bc2#
    • 1...Qb6
      • 2.Bxb1#
      • 2.Bc2#
      • 2.Bd3#
    • 1...Qa7
      • 2.Bxb1#
      • 2.Bc2#
      • 2.Bd3#
    • 1...Qb8
      • 2.Bxb1#
      • 2.Bc2#
      • 2.Bd3#
    • 1...Rg8
      • 2.hxg8S#
    • 1...Ba2
      • 2.Bd5#
    • 1...d3
      • 2.Bd5#
      • 2.Bc6#
      • 2.Bxb7#
    • 1...c6
      • 2.Bxb1#
      • 2.Bc2#
      • 2.Bd3#
  • Tries
    • 1.Sxf5+?
      • 1...Kxf7
        • 2.Qg7#
      • 1...Sxf5!
    • 1.Qg5+?
      • 1...Kf8
        • 2.h8Q#
        • 2.h8R#
      • 1...Ke6!
    • 1.Qxh4+?
      • 1...Kf8
        • 2.h8Q#
      • 1...Ke6!
    • 1.Qe6+?
      • 1...Kf8
        • 2.h8Q#
      • 1...Kxe6!
    • 1.Qf6+?
      • 1...Kf8
        • 2.h8Q#
        • 2.h8R#
      • 1...Kxf6!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Qg7#
      • 1...Qb2+
        • 2.Bc2#
      • 1...Qxa6
        • 2.Bd3#
      • 1...Qd5
        • 2.Sc8#
      • 1...Qc6
        • 2.Sc8#
      • 1...Qb3
        • 2.Sc8#
      • 1...Qb6
        • 2.Sc8#
        • 2.Bxb1#
        • 2.Bc2#
        • 2.Bd3#
      • 1...Rf8
        • 2.Qe6#
      • 1...Rg8
        • 2.hxg8S#
      • 1...Ba2
        • 2.Bd5#
      • 1...c6
        • 2.Bxb1#
        • 2.Bc2#
        • 2.Bd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(e);N_GUARD,XR(D)::R(A)+B(C)
    • Q(e);CHECK,N_GUARD::R(A)+B(C)
    • R(j);OGATE::PXR(j)=S
    • B(a);N_GUARD::R(A)+B(C)
  • Tries
    • Try
      • S(E);CHECK,XP(d)
      • Vars
        • K(h);P-FLIGHT,XS(G)::QAR1(F)
      • Refutation
        • S(c);XS(E)
    • Try
      • Q(F);CHECK
      • Vars
        • K(h);S_FLIGHT::P=Q
      • Refutation
        • K(h);P-FLIGHT
    • Try
      • Q(F);CHECK,XS(c)
      • Vars
        • K(h);S_FLIGHT::P=Q
      • Refutation
        • K(h);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(h);S_FLIGHT::P=Q
      • Refutation
        • K(h);P-FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(h);S_FLIGHT::P=Q
      • Refutation
        • K(h);S_FLIGHT,XQ(F)
  • Actual
    • S(G);
    • Threat
      • QAR2(F)
    • Vars
      • Q(e);CHECK,N_GUARD::R(A)+B(C)
      • Q(e);N_GUARD,XR(D)::R(A)+B(C)
      • Q(e);N_GUARD::S(E)
      • R(j);SBLOCK::QAR1(F)
      • R(j);OGATE::PXR(j)=S
      • B(a);N_GUARD::R(A)+B(C)
HTML5 logo

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).