MESON Chess Problem Database

Problem Display
PID: 84372 (4n3/2p4B/K3p1rr/2p1N3/2Qpk1P1/1p2NR2/3np1PB/1b1R4 w - - 0 1)

Brown, David Leo

Het Belgisch Schaakbord (L'Echiquier Belge), 1979

4n3/2p4B/K3p1rr/2p1N3/2Qpk1P1/1p2NR2/3np1PB/1b1R4

#2

10 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rh3
      • 2.Bxg6#
    • 1...Rh4
      • 2.Bxg6#
    • 1...Ba2
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
  • Tries
    • 1.Rf4+?
      • 1...Kxe5
        • 2.Qxc5#
      • 1...Kxe3!
  • Keys
    • 1.Qxe6!
      • threat
        • 2.Qc6#
      • 1...Bd3+
        • 2.S5c4#
      • 1...Rxh2
        • 2.Bxg6#
      • 1...Rxh7
        • 2.Qxg6#
      • 1...Sxf3
        • 2.Sxf3#
      • 1...dxe3
        • 2.Rf4#
      • 1...d3
        • 2.Sc6#
      • 1...Sd6
        • 2.Qd5#
      • 1...Sf6
        • 2.Qf5#
      • 1...c6
        • 2.Qf5#
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • R(j);N_GUARD::B(J),XR(i)
    • B(a);N_GUARD::QAB1(F)
    • B(a);N_GUARD,P_PINQ(F)::QAB1(F),XB(a)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(f);N_SPINP(e),N_SPINR(i),P-FLIGHT,XS(H)::QAR2(F),XP(g)
      • Refutation
        • K(f);N_SPINP(e),N_SPINR(i),P-FLIGHT,XS(D)
  • Actual
    • Q(F);N_PINP(e),P_SPINQ(F),XP(h)
    • Threat
      • QAB(F)
    • Vars
      • B(a);CHECK,SBLOCK::QAR(F)+S(H)
      • R(j);N_GUARD,XB(C)::B(J),XR(i)
      • R(j);N_GUARD,N_SPINR(i),XB(J)::QAB(F),XR(i)
      • S(b);XR(E)::QAR(F)+S(H),XS(b)
      • P(e);SBLOCK,XS(D)::R1(E)
      • P(e);SBLOCK::QAR(F)+S(H)
      • S(l);N_PINQ(F)::QAB1(F)
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).