MESON Chess Problem Database

Problem Display
PID: 276014 (1B1r4/b4Q2/1N1ppp2/nR1pkp2/5p1p/3KnB1q/4N3/4R3 w - - 0 1)

Haring, Jacobus

1st Prize, Buletin Problemistic, 1973

1B1r4/b4Q2/1N1ppp2/nR1pkp2/5p1p/3KnB1q/4N3/4R3

#2

8 + 13

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Rd7
      • 2.Sxd7#
    • 1...Rxb8
      • 2.Sd7#
    • 1...Rc8
      • 2.Sd7#
    • 1...Re8
      • 2.Sd7#
    • 1...Rf8
      • 2.Sd7#
    • 1...Rg8
      • 2.Sd7#
    • 1...Rh8
      • 2.Sd7#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Qxe6#
      • 1...Re8
        • 2.Sd7#
      • 1...Qf1+!
    • 1.Sxd5?
      • threat
        • 2.Qxf6#
      • 1...Sxd5
        • 2.Sd4#
      • 1...exd5
        • 2.Qe7#
      • 1...Sg4
        • 2.Sb6#
      • 1...Rf8!
    • 1.Rxd5+?
      • 1...exd5
        • 2.Qe7#
      • 1...Sxd5!
  • Keys
    • 1.Bxd5!
      • threat
        • 2.Qxe6#
      • 1...Sd1+
        • 2.Bf3#
      • 1...Sf1+
        • 2.Bf3#
      • 1...Sc2+
        • 2.Bf3#
      • 1...Sg2+
        • 2.Bf3#
      • 1...Sec4+
        • 2.Bf3#
      • 1...Sg4+
        • 2.Bf3#
      • 1...Sxd5+
        • 2.Sg3#
      • 1...exd5
        • 2.Qe7#
      • 1...Re8
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 6
  • Sets
    • R(m);N_GUARD::S(F),XR(m)
    • R(m);N_GUARD,XB(H)::S(F)
    • R(m);N_GUARD::S(F)
  • Tries
    • Try
      • S(B);P_PINS(a)
      • Threat
        • QAR1(G),XP(j)
      • Vars
        • R(m);N_GUARD::S(F)
      • Refutation
        • Q(b);CHECK
    • Try
      • S(F);P_PINP(i),XP(f)
      • Threat
        • QAB1(G),XP(k)
      • Vars
        • S(a);P_PINB(D),P_SPINS(a),XS(F)::R(A)+S(B)
        • P(j);N_SPINP(i),OGATEB,P_SPINP(j),XS(F)::QAR2(G)
        • S(a);N_GUARD,P_PINB(D)::R(E)+S(F)
      • Refutation
        • R(m);
    • Try
      • R(E);CHECK,P_PINP(i),XP(f)
      • Vars
        • P(j);S_CUTS(a),XR(E)::QAR2(G)
      • Refutation
        • S(a);P_PINB(D),XR(E)
  • Actual
    • B(D);P_PINP(i),XP(f)
    • Threat
      • QAR1(G),XP(j)
    • Vars
      • S(a);CHECK,N_GUARD::R(E)+B(D)
      • S(a);CHECK,P_SPINS(a),XB(D)::R(A)+S(B)
      • P(j);N_SPINP(i),OGATEB,P_SPINP(j),XB(D)::QAR2(G)
      • R(m);N_GUARD::S(F)
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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).