MESON Chess Problem Database

Problem Display
PID: 235701 (K1k3n1/4pN2/3pr3/BB1N4/8/8/7Q/2r5 w - - 0 1)

Makaronets, Leonid

Mat, 1975

K1k3n1/4pN2/3pr3/BB1N4/8/8/7Q/2r5

#2

6 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qc2#
    • 1...Rb1
      • 2.Qc2#
    • 1...Rd1
      • 2.Qc2#
    • 1...Rce1
      • 2.Qc2#
    • 1...Rf1
      • 2.Qc2#
    • 1...Rg1
      • 2.Qc2#
    • 1...Rh1
      • 2.Qc2#
    • 1...Rc2
      • 2.Qxc2#
    • 1...Rc7
      • 2.Sb6#
  • Tries
    • 1.Sxe7+?
      • 1...Rxe7
        • 2.Sxd6#
      • 1...Sxe7!
    • 1.Qh8?
      • threat
        • 2.Qxg8#
      • 1...Rg1
        • 2.Qc3#
      • 1...Rg6
        • 2.Sxe7#
      • 1...Rc6!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qxe6#
      • 1...Re1
        • 2.Qc3#
      • 1...Rc7
        • 2.Sb6#
      • 1...Sf6
        • 2.Sxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • R(a);N_GUARD,P_PINB(B)::QAR(A)
    • R(a);N_GUARD::QAR(A)
    • R(a);N_GUARD::QAR(A),XR(a)
    • R(a);SBLOCK::S(D)
  • Tries
    • Try
      • S(D);CHECK,XP(d)
      • Vars
        • R(c);XS(D)::S(E),XP(b)
      • Refutation
        • S(f);XS(D)
    • Try
      • Q(A);P_PINS(f)
      • Threat
        • QAR(A),XS(f)
      • Vars
        • R(a);N_GUARD::QAR(A)
        • R(c);N_GUARD::S(D),XP(d)
      • Refutation
        • R(a);
  • Actual
    • Q(A);P_PINR(c)
    • Threat
      • QAB(A),XR(c)
    • Vars
      • R(a);N_GUARD::QAR(A)
      • R(a);SBLOCK::S(D)
      • S(f);N_GUARD::S(D),XP(d)
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).