MESON Chess Problem Database

Problem Display
PID: 222667 (8/8/8/8/2N1k3/1K1N2Q1/7B/8 w - - 0 1)

Sellman, Alexander G

Baltimore American and Commercial Advertiser, 1884

8/8/8/8/2N1k3/1K1N2Q1/7B/8

#2

5 + 1

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sf2+?
      • 1...Kd4
        • 2.Qe5#
        • 2.Qd6#
      • 1...Kd5
        • 2.Qd6#
      • 1...Kf5!
    • 1.Sb4?
      • threat
        • 2.Qf4#
        • 2.Qd3#
        • 2.Qg4#
      • 1...Kd4
        • 2.Qe5#
        • 2.Qe3#
      • 1...Kf5!
    • 1.Sc5+?
      • 1...Kd4
        • 2.Qe5#
        • 2.Qd6#
      • 1...Kd5
        • 2.Qd6#
      • 1...Kf5!
    • 1.Qf2?
      • 1...Kxd3
        • 2.Qe3#
      • 1...Kd5!
    • 1.Qf4+?
      • 1...Kxd3
        • 2.Qe3#
      • 1...Kd5!
    • 1.Qe5+?
      • 1...Kxd3
        • 2.Qe3#
      • 1...Kf3!
    • 1.Qe3+?
      • 1...Kd5
        • 2.Sb4#
      • 1...Kf5!
    • 1.Qf3+?
      • 1...Kd4
        • 2.Bg1#
        • 2.Be5#
      • 1...Kxf3!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qd3#
      • 1...Kd4
        • 2.Qe3#
      • 1...Kf5
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Threat
        • DUALS(3)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(C)::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT::S(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(D)
  • Actual
    • S(C);
    • Threat
      • QAB1(D)
    • Vars
      • K(a);P-FLIGHT::QAB1(D)
      • K(a);S_FLIGHT::QAB1(D)
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).