MESON Chess Problem Database

Problem Display
PID: 208058 (1B6/8/2p1Np1p/Q4P1P/2r1k1K1/2p1P3/1nP1R3/8 w - - 0 1)

Clerck, C

Kockelkorn, Carl

Kohtz, Johannes

Watertown (New York) Re-Union, 1873

1B6/8/2p1Np1p/Q4P1P/2r1k1K1/2p1P3/1nP1R3/8

#2

9 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.exd4#
    • 1...c5
      • 2.Qa8#
  • Tries
    • 1.Sg5+?
      • 1...fxg5
        • 2.Qe5#
      • 1...hxg5!
    • 1.Qd8?
      • 1...Ra4
        • 2.Sc5#
      • 1...Rb4
        • 2.Sc5#
      • 1...Rd4
        • 2.Sc5#
        • 2.Qxd4#
        • 2.exd4#
      • 1...Rc5
        • 2.Sxc5#
        • 2.Qd4#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
        • 2.cxd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...c5!
    • 1.Qc5?
      • 1...Ra4
        • 2.Qxc6#
      • 1...Rb4
        • 2.Qxc6#
      • 1...Rd4
        • 2.Qxd4#
        • 2.exd4#
      • 1...Sd1
        • 2.Qxc4#
      • 1...Sd3
        • 2.Qxc4#
      • 1...Sa4
        • 2.Qxc4#
      • 1...Rxc5!
  • Keys
    • 1.Qa2!
      • 1...Kd5+
        • 2.e4#
      • 1...Ra4
        • 2.Sc5#
      • 1...Rb4
        • 2.Sc5#
      • 1...Rd4
        • 2.Sc5#
        • 2.exd4#
      • 1...Rc5
        • 2.Sxc5#
      • 1...Sd1
        • 2.Qxc4#
      • 1...Sd3
        • 2.Qxc4#
      • 1...Sa4
        • 2.Qxc4#
      • 1...c5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(c);OGATE::R(B)+P(C),XR(c)
    • P(e);OGATEB::QAB(E)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • P(f);XS(H)::QAR1(E)
      • Refutation
        • P(g);XS(H)
    • Try
      • Q(E);
      • Vars
        • R(c);N_GUARD::S(H)
        • S(a);N_GUARD::QAB1(E)
      • Refutation
        • P(e);
    • Try
      • Q(E);
      • Vars
        • R(c);N_GUARD::QAB(E),XP(e)
        • S(a);N_GUARD::QAR2(E),XR(c)
      • Refutation
        • R(c);XQ(E)
  • Actual
    • Q(E);
    • Vars
      • K(d);CHECK,OGATE,P_SPINR(c),S_FLIGHT::P(C)
      • R(c);N_GUARD::S(H)
      • R(c);N_GUARD::S(H),XR(c)
      • S(a);N_GUARD::QAR2(E),XR(c)
      • P(e);OGATEB::QAB(E)
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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).