MESON Chess Problem Database

Problem Display
PID: 6346 (BQ1K4/8/b4p2/3p1pb1/3NkP2/p6R/q3N3/4R3 w - - 0 1)

Mansfield, Comins

1st Prize, Tijdschrift vd NSB, 1928

BQ1K4/8/b4p2/3p1pb1/3NkP2/p6R/q3N3/4R3

#2

8 + 8

35 L'Italia Scacchistica 1930
3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf4
      • 2.Qxf4#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Sc3#
        • 2.Re3#
      • 1...Bxf4
        • 2.Sc3#
        • 2.Qxf4#
      • 1...Bxe2
        • 2.Rxe2#
        • 2.Re3#
      • 1...Qb3
        • 2.Sc3#
      • 1...Qxc2!
    • 1.Sb5?
      • threat
        • 2.Sec3#
        • 2.Sbc3#
        • 2.Sd6#
      • 1...Qxe2
        • 2.Rxe2#
      • 1...Bxf4
        • 2.Sec3#
        • 2.Sbc3#
        • 2.Qxf4#
      • 1...Qb3
        • 2.Sec3#
        • 2.Sd6#
      • 1...Qc4
        • 2.Sec3#
        • 2.Sd6#
      • 1...Qa1
        • 2.Sc1#
        • 2.Sec3#
        • 2.Sd6#
      • 1...Qb2
        • 2.Sec3#
        • 2.Sd6#
      • 1...Qc2
        • 2.Sec3#
        • 2.Sd6#
      • 1...Qd2
        • 2.Sec3#
        • 2.Sd6#
      • 1...Bxb5!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qe7#
      • 1...Qxe2
        • 2.Sb5#
      • 1...Bxf4
        • 2.Sc3#
      • 1...Bxe2
        • 2.Sb3#
      • 1...Bc8
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(f);OGATE,XP(E)::QAR1(G),XB(f)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);::R(A)+S(B),DCHECK
      • Refutation
        • Q(a);XS(D)
    • Try
      • S(D);
      • Threat
        • DUALS(3)
      • Vars
        • Q(a);OGATE,P_SPINQ(a),XS(B)::R(A),XQ(a)
      • Refutation
        • B(g);XS(D)
  • Actual
    • Q(G);
    • Threat
      • QAR(G)
    • Vars
      • Q(a);N_GUARD,P_SPINQ(a),XS(B)::QAR(G)+S(D)
      • B(f);SBLOCK,XP(E)::R(A)+S(B),DCHECK
      • B(g);N_GUARD,P_SPINB(g),XS(B)::QAR(G)+S(D)
      • B(g);N_GUARD::QAR(G)+S(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).