MESON Chess Problem Database

Problem Display
PID: 240571 (8/8/B7/B4Qp1/3K4/6R1/4NnPp/5k1q w - - 0 1)

Cheylan, Yves

Thema Danicum, 1981

8/8/B7/B4Qp1/3K4/6R1/4NnPp/5k1q

#2

7 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Sc1#
  • Tries
    • 1.Ke3?
      • threat
        • 2.Qxf2#
      • 1...Qg1
        • 2.Sc1#
        • 2.Sd4#
      • 1...Qxg2!
    • 1.Rg4?
      • 1...Qg1
        • 2.Sc1#
      • 1...Qxg2!
    • 1.Rxg5?
      • 1...Qg1
        • 2.Sc1#
      • 1...Qxg2!
    • 1.Qf3?
      • 1...Qxg2
        • 2.Qxg2#
      • 1...Qg1
        • 2.Sc1#
        • 2.Sf4#
      • 1...g4!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Rxf2#
      • 1...Kxg2
        • 2.Rxf2#
      • 1...Qxg2
        • 2.Qb1#
      • 1...Qg1
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(b);SBLOCK::B(G)+S(A)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAR1(F),XS(c)
      • Refutation
        • Q(b);XP(B)
    • Try
      • R(C);
      • Vars
        • Q(b);SBLOCK::B(G)+S(A)
      • Refutation
        • Q(b);XP(B)
    • Try
      • R(C);XP(e)
      • Vars
        • Q(b);SBLOCK::B(G)+S(A)
      • Refutation
        • Q(b);XP(B)
    • Try
      • Q(F);
      • Vars
        • Q(b);OGATE,XP(B)::QAB1(F),XQ(b)
      • Refutation
        • P(e);
  • Actual
    • R(C);
    • Threat
      • R1(C),XS(c)
    • Vars
      • K(a);N_SPINS(c),S_FLIGHT,XP(B)::R1(C),XS(c)
      • Q(b);SBLOCK,XP(B)::QAR(F)
      • Q(b);SBLOCK::B(G)+S(A)
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).