MESON Chess Problem Database

Problem Display
PID: 274959 (1K4b1/8/1p1Q4/3nPp2/R1N1k3/4P3/1b6/3R2N1 w - - 0 1)

The Hong Oe

Western Morning News, 1925

(First published on Sat Sep 19 1925)

1K4b1/8/1p1Q4/3nPp2/R1N1k3/4P3/1b6/3R2N1

#2

8 + 6

15239 Valois Notebooks 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Rd4#
    • 1...Ba3
      • 2.Rd4#
    • 1...Bd4
      • 2.Rxd4#
    • 1...Bxe5
      • 2.Qxe5#
    • 1...Bh7
      • 2.Qxd5#
    • 1...Sc3
      • 2.Rd4#
      • 2.Qd3#
      • 2.Qd4#
    • 1...Sxe3
      • 2.Sd2#
    • 1...Sf6
      • 2.Qd3#
    • 1...Sc7
      • 2.Qd3#
    • 1...Se7
      • 2.Qd3#
    • 1...f4
      • 2.Qg6#
  • Tries
    • 1.Sxb2+?
      • 1...Sb4
        • 2.Qd4#
      • 1...Kxe3!
    • 1.e6?
      • threat
        • 2.Qxd5#
      • 1...Sxe3
        • 2.Sd2#
      • 1...Bd4
        • 2.Rxd4#
      • 1...Be5
        • 2.Qxe5#
      • 1...Sc3
        • 2.Rd4#
        • 2.Qf4#
        • 2.Qe5#
        • 2.Qd3#
        • 2.Qd4#
      • 1...Sb4
        • 2.Qf4#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sf6
        • 2.Qf4#
        • 2.Qd3#
      • 1...Sc7
        • 2.Qf4#
        • 2.Qd3#
      • 1...Se7
        • 2.Qf4#
        • 2.Qd3#
      • 1...Bxe6!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Qh1#
      • 1...Bxe5+
        • 2.Sd6#
      • 1...Sxe3
        • 2.Qxe3#
      • 1...f4
        • 2.Qg6#
      • 1...Sf4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • B(a);N_GUARD::R1(A)
    • B(a);N_GUARD::R1(A),XB(a)
    • B(a);OGATE,P_PINQ(G),XP(F)::QAR1(G),XB(a)
    • B(f);N_GUARD::QAB1(G),XS(c)
    • S(c);SBLOCK,XP(C)::R(D)+S(E),DCHECK
    • S(c);OGATE::QAB1(G)
    • P(d);OGATEB::QAB(G)
  • Tries
    • Try
      • S(E);CHECK,XB(a)
      • Vars
        • S(c);OGATE,P_SPINS(c)::QAR1(G)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • P(F);
      • Threat
        • QAB1(G),XS(c)
      • Vars
        • S(c);SBLOCK,XP(C)::R(D)+S(E),DCHECK
        • B(a);N_GUARD::R1(A),XB(a)
        • B(a);N_GUARD,P_PINQ(G)::QAR1(G),XB(a)
        • S(c);N_GUARD::QAR1(G)
        • S(c);N_GUARD::QAR1(G),XS(c)
      • Refutation
        • B(f);XP(F)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • B(a);CHECK,SBLOCK,XP(F)::R(D)+S(E),DCHECK
      • S(c);OGATE,XP(C)::QAR1(G),XS(c)
      • P(d);OGATEB::QAB(G)
      • S(c);N_GUARD::QAR1(G),XS(c)
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).