MESON Chess Problem Database

Problem Display
PID: 170951 (b7/4B3/1pp2R2/rN3QK1/p1k1N3/4p3/1PPp1PB1/3r4 w - - 0 1)

Dhondt, Hubert

2nd Prize, Vlaamse Problemistenbond, 1930

b7/4B3/1pp2R2/rN3QK1/p1k1N3/4p3/1PPp1PB1/3r4

#2

10 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...a3
      • 2.b3#
  • Tries
    • 1.Sxd2+?
      • 1...exd2
        • 2.Qd3#
      • 1...Rxd2!
    • 1.Bf1+?
      • 1...e2
        • 2.Bxe2#
      • 1...Rxf1!
    • 1.Bc5?
      • threat
        • 2.Sed6#
        • 2.Sa3#
        • 2.Sbd6#
      • 1...Rxb5
        • 2.Sd6#
        • 2.Qe6#
      • 1...bxc5
        • 2.Qxc5#
      • 1...cxb5
        • 2.Sd6#
      • 1...Ra1
        • 2.Sed6#
        • 2.Sbd6#
      • 1...a3
        • 2.Sed6#
        • 2.Sbd6#
      • 1...Kxb5!
    • 1.Qf4?
      • threat
        • 2.Sc3#
      • 1...Rxb5+
        • 2.Sc5#
      • 1...Kd5
        • 2.Sxd2#
        • 2.Sec3#
        • 2.Sg3#
        • 2.Sc5#
      • 1...cxb5
        • 2.Sxd2#
      • 1...c5
        • 2.Sed6#
      • 1...Kxb5!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Sc3#
      • 1...Rxb5+
        • 2.Sc5#
      • 1...Kxb5
        • 2.Qe2#
      • 1...Kd5
        • 2.Qe6#
      • 1...cxb5
        • 2.Sxd2#
      • 1...c5
        • 2.Sed6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD::P(A)
  • Tries
    • Try
      • S(E);CHECK,XP(b)
      • Vars
        • P(c);XS(E)::QAB1(G)
      • Refutation
        • R(a);XS(E)
    • Try
      • B(D);CHECK
      • Vars
        • P(c);P_SPINP(c)::B(D),XP(c)
      • Refutation
        • R(a);XB(D)
    • Try
      • B(J);
      • Threat
        • DUALS(3)
      • Vars
        • P(g);OGATE,XB(J)::QAR1(G),XP(g)
        • P(h);XS(F)::S(E)
      • Refutation
        • K(e);S_FLIGHT,XS(F)
    • Try
      • Q(G);P_SPINS(F)
      • Threat
        • QAR(G)+S(E)
      • Vars
        • R(f);CHECK,SBLOCK,XS(F)::QAR(G)+S(E)
        • P(h);SBLOCK,XS(F)::QAR(G)+S(E),DCHECK,XP(b)
        • P(h);N_PINS(F),SBLOCK::QAR(G)+S(E),DCHECK
      • Refutation
        • K(e);S_FLIGHT,XS(F)
  • Actual
    • Q(G);P_SPINS(F)
    • Threat
      • QAR(G)+S(E)
    • Vars
      • R(f);CHECK,SBLOCK,XS(F)::QAR(G)+S(E)
      • K(e);S_FLIGHT,XS(F)::QAB(G)
      • K(e);N_PINS(F),S_FLIGHT::QAB1(G)
      • P(h);SBLOCK,XS(F)::QAR(G)+S(E),DCHECK,XP(b)
      • P(h);N_PINS(F),SBLOCK::QAR(G)+S(E),DCHECK
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).