MESON Chess Problem Database

Problem Display
PID: 214549 (5Q2/B3n1p1/4N3/6RB/2p1k1NK/b1P1p3/4n1b1/2R5 w - - 0 1)

Freund, Jacob

Magyarorszag es a Nagyvilag, 1879

5Q2/B3n1p1/4N3/6RB/2p1k1NK/b1P1p3/4n1b1/2R5

#2

9 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc1
      • 2.Sc5#
    • 1...Bb2
      • 2.Sc5#
    • 1...Bc5
      • 2.Sxc5#
    • 1...Sd5
      • 2.Bg6#
      • 2.Qf5#
    • 1...Sf5+
      • 2.Qxf5#
    • 1...Sc6
      • 2.Bg6#
      • 2.Qf5#
    • 1...Sg6+
      • 2.Bxg6#
    • 1...Sc8
      • 2.Bg6#
      • 2.Qf5#
    • 1...Sg8
      • 2.Bg6#
      • 2.Qf5#
  • Tries
    • 1.Bg6+?
      • 1...Sf5+
        • 2.Qxf5#
      • 1...Sxg6+!
    • 1.Rd1?
      • threat
        • 2.Re5#
      • 1...Sf5+
        • 2.Qxf5#
      • 1...Sg6+
        • 2.Bxg6#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sc6
        • 2.Bg6#
        • 2.Qf5#
      • 1...Bd6!
    • 1.Qf4+?
      • 1...Kd3
        • 2.Qxe3#
      • 1...Sxf4!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qxe3#
      • 1...Sf5+
        • 2.Qxf5#
      • 1...Sg6+
        • 2.Bxg6#
      • 1...Kd3
        • 2.Qxe3#
      • 1...Bxc1
        • 2.Sc5#
      • 1...exf2
        • 2.Sxf2#
      • 1...Bc5
        • 2.Sxc5#
      • 1...Sd5
        • 2.Bg6#
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(c);N_GUARD,XR(A)::S(G)
    • B(c);N_GUARD::S(G)
    • B(c);N_GUARD::S(G),XB(c)
    • S(g);CHECK,N_GUARD::QAB1(I),XS(g)
    • S(g);CHECK,N_GUARD::B(F),XS(g)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • S(g);CHECK,N_GUARD,P_SPINS(g)::QAB1(I),XS(g)
      • Refutation
        • S(g);CHECK,XB(F)
    • Try
      • R(A);
      • Threat
        • R1(E)
      • Vars
        • S(g);CHECK,N_GUARD::QAB1(I),XS(g)
        • S(g);CHECK,N_GUARD::B(F),XS(g)
        • S(a);N_GUARD::QAR1(I),XS(a)
      • Refutation
        • B(c);
    • Try
      • Q(I);CHECK
      • Vars
        • K(f);S_FLIGHT::QAR1(I),XP(d)
      • Refutation
        • S(a);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I),XP(d)
    • Vars
      • S(g);CHECK,N_GUARD::QAB1(I),XS(g)
      • S(g);CHECK,N_GUARD::B(F),XS(g)
      • K(f);S_FLIGHT::QAR1(I),XP(d)
      • B(c);N_GUARD,XR(A)::S(G)
      • P(d);XQ(I)::S(C),XP(d)
      • B(c);N_GUARD::S(G),XB(c)
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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).