MESON Chess Problem Database

Problem Display
PID: 71231 (1K6/B7/3p4/3r1P2/7p/2P5/2BNk3/1Q1R3N w - - 0 1)

Hartong, Jan

Sp. Prize, Il Due Mosse, 1958

1K6/B7/3p4/3r1P2/7p/2P5/2BNk3/1Q1R3N

#2

9 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Bxd3#
    • 1...Ra5
      • 2.Bd3#
    • 1...Rb5+
      • 2.Qxb5#
    • 1...Re5
      • 2.Bd3#
    • 1...Rxf5
      • 2.Bd3#
    • 1...h3
      • 2.Sg3#
  • Tries
    • 1.Bd4?
      • threat
        • 2.Bd3#
      • 1...Rb5+
        • 2.Qxb5#
      • 1...Rxd4!
    • 1.Qb5+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rxb5+!
  • Keys
    • 1.Qb7!
      • 1...Rxd2
        • 2.Qg2#
        • 2.Qe4#
      • 1...Rxf5
        • 2.Qe4#
      • 1...Rd4
        • 2.Qf3#
      • 1...Rc5
        • 2.Qf3#
        • 2.Qe4#
      • 1...Rd3
        • 2.Qg2#
      • 1...Ra5
        • 2.Qg2#
        • 2.Qf3#
        • 2.Qe4#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Re5
        • 2.Qg2#
        • 2.Qf3#
      • 1...h3
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(c);N_GUARD::B(D),XR(c)
    • R(c);N_GUARD::B(D)
    • R(c);CHECK,N_GUARD::QAB(A),XR(c)
    • R(c);N_GUARD,XP(G)::B(D)
    • P(b);N_GUARD::S(C)
  • Tries
    • Try
      • B(H);
      • Threat
        • B(D)
      • Vars
        • R(c);CHECK,N_GUARD::QAB(A),XR(c)
      • Refutation
        • R(c);XB(H)
    • Try
      • Q(A);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(A),XR(c)
      • Refutation
        • R(c);CHECK,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • R(c);OGATE,XP(G)::QAR2(A)
      • R(c);OGATE::QAB1(A)
      • R(c);OGATE::QAR2(A)
      • R(c);N_GUARD,P_PINQ(A)::QAB(A),XR(c)
      • P(b);N_GUARD::S(C)
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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).