Problem Display
PID: 96831 (3rb3/nBp1p3/nNrb2NB/p3p3/Rq2k1P1/1PQ1p1p1/4P3/R3K3 w Q - 0 1)

Wenman, Francis Percival (aka Percy Wenman)

200 Assorted Problems (Wenman), 1945

3rb3/nBp1p3/nNrb2NB/p3p3/Rq2k1P1/1PQ1p1p1/4P3/R3K3

#2

11 + 14


6490 yacpdb 2009

SOLUTION


  • SOUND
  • Sets
    • 1...Qxa4
      • 2.Qd3#
      • 2.Qxe3#
    • 1...Qc4
      • 2.Rxc4#
      • 2.Qd3#
      • 2.Qxe3#
      • 2.Qxc4#
    • 1...Qd4
      • 2.Qc2#
      • 2.Qd3#
      • 2.Qxe3#
  • Tries
    • 1.Kd1?
      • threat
        • 2.Qd3#
        • 2.Qxe3#
      • 1...Qd4+
        • 2.Qd3#
      • 1...cxb6
        • 2.Qd3#
      • 1...Sc5
        • 2.Qxe3#
      • 1...Bc5+!
    • 1.Kf1?
      • threat
        • 2.Qd3#
        • 2.Qxe3#
      • 1...cxb6
        • 2.Qd3#
      • 1...Bc5
        • 2.Qxe5#
      • 1...Sc5
        • 2.Qxe3#
      • 1...g2+!
    • 1.Rxb4+?
      • 1...Sxb4
        • 2.Qxe3#
        • 2.Qc4#
      • 1...axb4
        • 2.Qd3#
        • 2.Qxe3#
        • 2.Qc4#
      • 1...Bxb4!
  • Keys
    • 1.0-0-0!
      • threat
        • 2.Qc2#
      • 1...Bc5
        • 2.Qxe5#
      • 1...Sc5
        • 2.Qxe3#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);N_SPINQ(E),P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);CHECK::QAB1(E)
        • P(k);XS(H)::QAB1(E)
        • S(g);::QAR1(E),XP(a)
      • Refutation
        • B(i);CHECK
    • Try
      • K(B);N_SPINQ(E),P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(k);XS(H)::QAB1(E)
        • B(i);N_GUARD::QAR1(E),XP(f)
        • S(g);::QAR1(E),XP(a)
      • Refutation
        • P(b);CHECK
    • Try
      • R(F);CHECK,N_SPINQ(E),XQ(c)
      • Refutation
        • B(i);P_PINQ(E),XR(F)
  • Actual
    • K(B);0-0-0
    • Threat
      • QAB(E)
    • Vars
      • B(i);N_PINQ(E)::QAR1(E),XP(f)
      • S(g);N_PINQ(E)::QAR1(E),XP(a)


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).