MESON Chess Problem Database

Problem Display
PID: 275089 (3QK3/3N1p2/8/r1N1P3/R1Pkp3/2p1n3/2P5/n5B1 w - - 0 1)

Seilberger, Johann Joseph Petrus Adrianus

van Dijk, Johannes

Die Tat, 1946

3QK3/3N1p2/8/r1N1P3/R1Pkp3/2p1n3/2P5/n5B1

#2

9 + 7

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Sxb3#
    • 1...f5
      • 2.Se6#
    • 1...f6
      • 2.Se6#
  • Tries
    • 1.Sb6+?
      • 1...Kxc5
        • 2.Qd6#
      • 1...Kxe5!
    • 1.Sf6+?
      • 1...Kxc5
        • 2.Qd6#
      • 1...Kxe5!
    • 1.Sb8+?
      • 1...Kxc5
        • 2.Bxe3#
        • 2.Qd6#
      • 1...Kxe5!
    • 1.Sf8+?
      • 1...Kxc5
        • 2.Qd6#
      • 1...Kxe5!
    • 1.Qxa5?
      • 1...Sb3
        • 2.Sxb3#
      • 1...f5
        • 2.Se6#
      • 1...f6
        • 2.Se6#
      • 1...Sxc2!
  • Keys
    • 1.Sd3!
      • threat
        • 2.S7c5#
      • 1...Rxe5+
        • 2.S7xe5#
      • 1...Rxa4
        • 2.Sb6#
      • 1...exd3
        • 2.Qh4#
      • 1...Rc5
        • 2.S7xc5#
      • 1...Rd5
        • 2.c5#
      • 1...Ra6
        • 2.Sb6#
      • 1...Ra7
        • 2.Qb6#
      • 1...Ra8
        • 2.Sb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::S(E),XS(a)
    • P(g);N_GUARD::S(E)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(d);S_FLIGHT,XS(E)::QAB1(H)
      • Refutation
        • K(d);N_SPINS(c),S_FLIGHT,XP(F)
    • Try
      • S(G);CHECK
      • Vars
        • K(d);S_FLIGHT,XS(E)::QAB1(H)
      • Refutation
        • K(d);N_SPINS(c),S_FLIGHT,XP(F)
    • Try
      • S(G);CHECK
      • Refutation
        • K(d);N_SPINS(c),S_FLIGHT,XP(F)
    • Try
      • S(G);CHECK
      • Vars
        • K(d);S_FLIGHT,XS(E)::QAB1(H)
      • Refutation
        • K(d);N_SPINS(c),S_FLIGHT,XP(F)
    • Try
      • Q(H);XR(f)
      • Vars
        • S(a);N_GUARD::S(E),XS(a)
        • P(g);N_GUARD::S(E)
      • Refutation
        • S(a);XP(B)
  • Actual
    • S(E);
    • Threat
      • QAR(H)+S(G)
    • Vars
      • R(f);CHECK,XP(F)::QAR(H)+S(G),XR(f)
      • R(f);N_GUARD,XR(C)::QAR(H)+S(G)
      • P(e);OGATEB,XS(E)::QAR(H)
      • R(f);::QAR(H)+S(G),XR(f)
      • R(f);N_GUARD,SBLOCK::R(C)+P(D)
      • R(f);N_GUARD::QAR(H)+S(G)
      • R(f);N_GUARD::QAB(H)
      • R(f);N_GUARD,P_PINQ(H)::QAR(H)+S(G)
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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).