MESON Chess Problem Database

Problem Display
PID: 21752 (8/8/8/K7/1p1p4/pQBRp3/4p3/1Nk5 w - - 0 1)

Kainer, Cenek

Casopis ceskoslovenskych sachistu, 1921

8/8/8/K7/1p1p4/pQBRp3/4p3/1Nk5

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...e1S
      • 2.Rd1#
      • 2.Qd1#
    • 1...e1B
      • 2.Rd1#
      • 2.Qd1#
    • 1...a2
      • 2.Qb2#
  • Tries
    • 1.Sxa3?
      • threat
        • 2.Bb2#
        • 2.Qc2#
        • 2.Qb1#
        • 2.Qb2#
      • 1...bxc3
        • 2.Qc2#
        • 2.Qb1#
      • 1...dxc3
        • 2.Qc2#
        • 2.Qb1#
      • 1...e1S
        • 2.Bb2#
        • 2.Rd1#
        • 2.Qd1#
        • 2.Qb1#
        • 2.Qb2#
      • 1...bxa3!
    • 1.Bxb4?
      • threat
        • 2.Bxa3#
      • 1...e1B
        • 2.Rd1#
      • 1...a2
        • 2.Ba3#
      • 1...e1Q!
    • 1.Rd2?
      • threat
        • 2.Qc2#
      • 1...exd2
        • 2.Bxd2#
      • 1...e1S
        • 2.Rd1#
        • 2.Qd1#
      • 1...d3!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qb1#
      • 1...exd2
        • 2.Bxd2#
      • 1...a2
        • 2.Bb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::QAB1(B)
  • Tries
    • Try
      • S(A);XP(c)
      • Threat
        • DUALS(4)
      • Refutation
        • P(e);XS(A)
    • Try
      • B(C);XP(e)
      • Threat
        • B(C),XP(c)
      • Vars
        • P(b);N_GUARD,P_PINB(C)::R1(D)
        • P(c);::B(C)
      • Refutation
        • P(b);P_PINB(C)
    • Try
      • R(D);
      • Threat
        • QAR1(B)
      • Vars
        • P(d);OGATE,XR(D)::B(C),XP(d)
      • Refutation
        • P(f);
  • Actual
    • S(A);
    • Threat
      • QAR1(B)
    • Vars
      • P(d);OGATE,XS(A)::B(C),XP(d)
      • P(c);N_GUARD::B(C)
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).