MESON Chess Problem Database

Problem Display
PID: 224453 (2Q5/8/7B/4b3/3RB3/3N1N2/1p2k3/1b4KR w - - 0 1)

Towne, AL

Philadelphia Times, 1887

2Q5/8/7B/4b3/3RB3/3N1N2/1p2k3/1b4KR

#2

8 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd1
      • 2.Kf2#
    • 1...Ba2
      • 2.Qc2#
    • 1...Bc2
      • 2.Qxc2#
  • Tries
    • 1.Sfxe5?
      • threat
        • 2.Bf3#
        • 2.Qg4#
      • 1...Kd1
        • 2.Kf2#
        • 2.Bf3#
      • 1...Bxd3!
    • 1.Rh2+?
      • 1...Kd1
        • 2.Sxb2#
        • 2.Rd2#
      • 1...Bxh2+!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qd2#
        • 2.Qe1#
        • 2.Qf1#
      • 1...Bh2+
        • 2.Rxh2#
      • 1...Bxd4+
        • 2.Sxd4#
      • 1...bxc1Q+
        • 2.Sxc1#
      • 1...bxc1R+
        • 2.Sxc1#
      • 1...bxc1S
        • 2.Sxc1#
      • 1...bxc1B
        • 2.Sxc1#
      • 1...Bg3
        • 2.Qd2#
        • 2.Qf1#
      • 1...Bf4
        • 2.Sxf4#
        • 2.Qe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • K(c);S_FLIGHT::R(B)+K(A)
    • B(a);N_GUARD::QAR2(H)
    • B(a);N_GUARD::QAR2(H),XB(a)
  • Tries
    • Try
      • S(D);XB(d)
      • Threat
        • DUALS(2)
      • Refutation
        • B(a);XS(C)
    • Try
      • R(B);CHECK
      • Refutation
        • B(d);CHECK,XR(B)
  • Actual
    • Q(H);
    • Threat
      • DUALS(3)
    • Vars
      • B(d);CHECK,N_GUARD::R(B),XB(d)
      • B(d);CHECK,XR(E)::S(D),XB(d)
      • P(b);CHECK,XQ(H)::S(C),XQ(b)
      • P(b);CHECK,XQ(H)::S(C),XR(b)
      • P(b);XQ(H)::S(C),XS(b)
      • P(b);XQ(H)::S(C),XB(b)
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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).