MESON Chess Problem Database

Problem Display
PID: 214557 (3N4/b1rn4/2b1Rq2/1p1krN2/1B1n4/KP6/8/1BQR4 w - - 0 1)

Stafford, JA

Cincinnati Commercial, 1880

3N4/b1rn4/2b1Rq2/1p1krN2/1B1n4/KP6/8/1BQR4

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Rd6#
    • 1...Qg5
      • 2.Rd6#
    • 1...Qe7
      • 2.Sxe7#
    • 1...Qg7
      • 2.Rd6#
    • 1...Qxd8
      • 2.Rd6#
    • 1...Qh8
      • 2.Se7#
      • 2.Rd6#
    • 1...Qxf5
      • 2.Rd6#
    • 1...Qg6
      • 2.Se7#
    • 1...Qh6
      • 2.Se7#
    • 1...Qf7
      • 2.Rd6#
    • 1...Re3
      • 2.Sxe3#
    • 1...Re4
      • 2.Bxe4#
    • 1...Rxf5
      • 2.Be4#
    • 1...Rb7
      • 2.Qxc6#
    • 1...Bb8
      • 2.Rxd4#
    • 1...Sc5
      • 2.Rxd4#
    • 1...Sb6
      • 2.Rxd4#
      • 2.Qc5#
  • Tries
    • 1.Qc5+?
      • 1...Sxc5
        • 2.Rxd4#
      • 1...Bxc5!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Se3#
      • 1...Qxg5
        • 2.Rd6#
      • 1...Qxd8
        • 2.Rd6#
      • 1...Qxf5
        • 2.Rd6#
      • 1...Rxf5
        • 2.Be4#
      • 1...Re3
        • 2.Sxe3#
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 11
  • Sets
    • Q(f);N_GUARD::R1(H)
    • Q(f);N_GUARD,P_PINB(F)::S(G),XQ(f)
    • Q(f);N_GUARD,XS(I)::R1(H)
    • Q(f);N_GUARD,XS(G)::R1(H)
    • Q(f);N_GUARD::S(G)
    • R(d);N_GUARD,P_PINP(E)::S(G),XR(d)
    • R(d);N_GUARD::B(A),XR(d)
    • R(d);N_GUARD,XS(G)::B(A)
    • R(h);N_GUARD::QAB1(B),XB(e)
    • B(g);N_GUARD::R1(C),XS(a)
    • S(i);S_CUTB(g)::R1(C),XS(a)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(i);XQ(B)::R1(C),XS(a)
      • Refutation
        • B(g);P_PINB(F),XQ(B)
  • Actual
    • Q(B);
    • Threat
      • S(G)
    • Vars
      • Q(f);N_GUARD,XQ(B)::R1(H)
      • Q(f);N_GUARD,XS(I)::R1(H)
      • Q(f);N_GUARD,XS(G)::R1(H)
      • R(d);N_GUARD,P_SPINR(d),XS(G)::B(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).