MESON Chess Problem Database

Problem Display
PID: 197919 (K1Bn1r2/B1b2N2/3Rn3/8/2P1kp2/3N2P1/5Q2/3r2q1 w - - 0 1)

Mlynka, Karol

Stella Polaris, 1966

K1Bn1r2/B1b2N2/3Rn3/8/2P1kp2/3N2P1/5Q2/3r2q1

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Sc5#
      • 2.Rxd4#
    • 1...Sc5
      • 2.Sxc5#
      • 2.Sg5#
      • 2.Rd4#
      • 2.Qxf4#
    • 1...Sg5
      • 2.Sc5#
      • 2.Sxg5#
      • 2.Rd4#
      • 2.Qxf4#
    • 1...Sg7
      • 2.Sc5#
      • 2.Sg5#
      • 2.Rd4#
      • 2.Qxf4#
  • Tries
    • 1.Sc5+?
      • 1...Sxc5
        • 2.Qxf4#
      • 1...Kf5!
    • 1.Sg5+?
      • 1...Sxg5
        • 2.Rd4#
      • 1...Kf5!
    • 1.Rd4+?
      • 1...Sxd4
        • 2.Sc5#
      • 1...Kf5!
  • Keys
    • 1.Qxf4+!
      • 1...Sxf4
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • S(e);XS(B)::QAR1(A),XP(d)
      • Refutation
        • K(c);P_SPINP(d),P_SPINS(e),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • S(e);XS(G)::R1(E)
      • Refutation
        • K(c);P_SPINP(d),P_SPINS(e),S_FLIGHT
    • Try
      • R(E);CHECK
      • Vars
        • S(e);XR(E)::S(B)
      • Refutation
        • K(c);P_SPINP(d),P_SPINS(e),S_FLIGHT
  • Actual
    • Q(A);CHECK,XP(d)
    • Vars
      • S(e);XQ(A)::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).