MESON Chess Problem Database

Problem Display
PID: 277069 (7b/1Np2Q2/8/K1B1k2r/4P3/5n2/4Rn2/4N2b w - - 0 1)

Blom, JK

Probleemblad, 1954

7b/1Np2Q2/8/K1B1k2r/4P3/5n2/4Rn2/4N2b

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rh2
      • 2.Qf5#
    • 1...Rh3
      • 2.Qf5#
    • 1...Rh4
      • 2.Qf5#
    • 1...Rf5
      • 2.Qxf5#
    • 1...Rh6
      • 2.Qf5#
    • 1...Rh7
      • 2.Qf5#
    • 1...Sd1
      • 2.Sd3#
    • 1...Sd3
      • 2.Sxd3#
    • 1...Sh3
      • 2.Sd3#
    • 1...Sxe4
      • 2.Sd3#
    • 1...Sg4
      • 2.Sd3#
    • 1...Sg5
      • 2.Qf5#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Sc6#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Bf6
        • 2.Qxc7#
      • 1...Rh6
        • 2.Qf5#
      • 1...c6
        • 2.Sxc6#
      • 1...Sd4!
    • 1.Qxc7+?
      • 1...Ke6
        • 2.Qe7#
      • 1...Kf6!
  • Keys
    • 1.Be3!
      • threat
        • 2.Qe7#
      • 1...Kxe4+
        • 2.Bc5#
      • 1...Sxe4
        • 2.Sd3#
      • 1...Rh6
        • 2.Qf5#
      • 1...Rh7
        • 2.Qf5#
      • 1...Bf6
        • 2.Qd5#
      • 1...Sd4
        • 2.Bf4#
      • 1...Sg5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(e);N_GUARD::QAR1(G)
    • R(e);N_GUARD::QAR1(G),XR(e)
    • S(b);N_GUARD::S(A)
    • S(b);N_GUARD::S(A),XS(b)
    • S(b);N_GUARD,P_SPINS(b),XP(C)::S(A)
    • S(c);S_CUTR(e)::QAR1(G)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • R(e);N_GUARD::QAR1(G),XR(e)
        • B(g);SBLOCK::QAB(G),XP(f)
        • R(e);N_GUARD::QAR1(G)
        • P(f);::S(F),XP(f)
      • Refutation
        • S(c);
    • Try
      • Q(G);CHECK,XP(f)
      • Vars
        • K(d);N_GUARD,P-FLIGHT,P_PINB(E)::QAR1(G)
      • Refutation
        • K(d);P_PINB(E),S_FLIGHT
  • Actual
    • B(E);
    • Threat
      • QAR2(G)
    • Vars
      • K(d);CHECK,OGATEB,P-FLIGHT,XP(C)::R(B)+B(E)
      • S(b);N_GUARD,SBLOCK,XP(C)::S(A)
      • R(e);N_GUARD::QAR1(G)
      • B(g);SBLOCK::QAR1(G)
      • S(c);SBLOCK::B(E)
      • S(c);S_CUTR(e)::QAR1(G)
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).