MESON Chess Problem Database

Problem Display
PID: 275693 (1b1Q1B2/3q4/r7/rnR5/1N1k4/p3p3/1nB5/K1R5 w - - 0 1)

Froberg, Johan Hilding Laurentius

Schackvarlden, 1941

1b1Q1B2/3q4/r7/rnR5/1N1k4/p3p3/1nB5/K1R5

#2

7 + 9

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Qxd5#
    • 1...Rc6
      • 2.Sxc6#
    • 1...Ra7
      • 2.Sc6#
    • 1...Ra8
      • 2.Sc6#
    • 1...Sd1
      • 2.Rxd1#
    • 1...Sa4
      • 2.Rd1#
  • Tries
    • 1.Qh4+?
      • 1...Bf4
        • 2.Qxf4#
      • 1...Qg4!
    • 1.Qf6+?
      • 1...Be5
        • 2.Qxe5#
      • 1...Rxf6!
  • Keys
    • 1.Bf5!
      • threat
        • 2.Sc2#
      • 1...Qd5
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Qd6
        • 2.Bg7#
      • 1...Rd6
        • 2.Qh4#
      • 1...Bd6
        • 2.Rd5#
      • 1...Sc4
        • 2.R1xc4#
      • 1...Sd6
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • Q(h);OGATE::QAR1(F),XQ(h)
    • R(g);N_GUARD::S(D),XR(g)
    • R(g);N_GUARD::S(D)
    • S(a);N_GUARD::R(B),XS(a)
    • S(a);N_GUARD::R(B)
  • Tries
    • Try
      • Q(F);CHECK,N_PINQ(h)
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::QAR2(F),XB(i)
      • Refutation
        • Q(h);P_SPINQ(h)
    • Try
      • Q(F);CHECK,N_PINQ(h)
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::QAB1(F),XB(i)
      • Refutation
        • R(g);XQ(F)
  • Actual
    • B(C);
    • Threat
      • S(D)
    • Vars
      • Q(h);S_CUTB(i),S_CUTR(g)::B(G)
      • R(g);N_SPINQ(h),S_CUTB(i)::QAR(F)
      • B(i);N_SPINQ(h),S_CUTQ(h)::R1(E)
      • S(a);N_GUARD::R1(B),XS(a)
      • S(f);N_SPINQ(h),S_CUTB(i),S_CUTR(g)::QAB(F)
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).