MESON Chess Problem Database

Problem Display
PID: 273002 (1N6/3p4/8/1bBk1K1R/4Np2/3qp3/p2Q4/5B2 w - - 0 1)

Marysko, Milos

Schakend Nederland, 1967

1N6/3p4/8/1bBk1K1R/4Np2/3qp3/p2Q4/5B2

#2

7 + 7

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qxa2#
      • 2.Qxd3#
    • 1...Qd4
      • 2.Qxd4#
    • 1...Ba4
      • 2.Qxd3#
    • 1...Bc6
      • 2.Qxd3#
  • Tries
    • 1.Kxf4+?
      • 1...Kc4
        • 2.Qc3#
        • 2.Qb4#
        • 2.Qxa2#
        • 2.Qc2#
        • 2.Qxd3#
      • 1...Ke6!
    • 1.Kf6+?
      • 1...Kc4
        • 2.Qc3#
        • 2.Qb4#
        • 2.Qxa2#
        • 2.Qc2#
        • 2.Qxd3#
      • 1...Kxe4!
    • 1.Kg6+?
      • 1...Kc4
        • 2.Qc3#
        • 2.Qb4#
        • 2.Qxa2#
        • 2.Qc2#
        • 2.Qxd3#
      • 1...Ke6
        • 2.Bh3#
      • 1...Kxe4!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qg8#
      • 1...Qxe4+
        • 2.Kf6#
      • 1...Kc4
        • 2.Qxa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(b);N_PINS(C),OGATE::QAR1(B),XQ(b)
    • B(e);N_GUARD::QAR2(B),XQ(b)
  • Tries
    • Try
      • K(E);CHECK,N_SPINS(C),P-FLIGHT,XP(d)
      • Refutation
        • K(f);N_SPINQ(b),S_FLIGHT
    • Try
      • K(E);CHECK,N_SPINS(C),P-FLIGHT
      • Refutation
        • K(f);N_SPINQ(b),S_FLIGHT,XS(C)
    • Try
      • K(E);CHECK,S_FLIGHT
      • Vars
        • K(f);N_GUARD,N_SPINQ(b),S_FLIGHT::B(A)
      • Refutation
        • K(f);N_SPINQ(b),S_FLIGHT,XS(C)
  • Actual
    • Q(B);N_PINQ(b)
    • Threat
      • QAB(B)
    • Vars
      • Q(b);CHECK,P_SPINQ(b),XS(C)::R(F)+K(E)
      • K(f);P_SPINQ(b),S_CUTB(e),S_FLIGHT::QAB(B),XP(a)
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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).