MESON Chess Problem Database

Problem Display
PID: 225886 (8/1p1r1p2/1Qpk1p2/1p3P2/1K2RP2/3p4/3P4/8 w - - 0 1)

Svoboda, Rudolf

Praca, 1948

8/1p1r1p2/1Qpk1p2/1p3P2/1K2RP2/3p4/3P4/8

#2

6 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Rd4#
      • 2.Qd4#
    • 1...Rc7
      • 2.Qd4#
    • 1...Re7
      • 2.Rd4#
    • 1...Rd8
      • 2.Qxd8#
  • Tries
    • 1.Re1?
      • 1...Kd5
        • 2.Qc5#
      • 1...Rc7
        • 2.Qd4#
      • 1...Rd8
        • 2.Qxd8#
      • 1...Re7!
    • 1.Re6+?
      • 1...Kd5
        • 2.Qc5#
      • 1...fxe6!
    • 1.Re8?
      • 1...Kd5
        • 2.Qc5#
      • 1...Rc7
        • 2.Qd4#
      • 1...Rd8
        • 2.Qxd8#
      • 1...Re7!
  • Keys
    • 1.Re3!
      • 1...Kd5
        • 2.Qc5#
      • 1...Rc7
        • 2.Qd4#
      • 1...Re7
        • 2.Rxd3#
      • 1...Rd8
        • 2.Qxd8#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(g);SBLOCK::QAR2(F)
    • R(g);SBLOCK::R(C)
    • R(g);OGATEB::QAR2(F),XR(g)
  • Tries
    • Try
      • R(C);
      • Vars
        • K(d);N_SPINP(c),P-FLIGHT::QAR1(F)
        • R(g);SBLOCK::QAR2(F)
        • R(g);OGATEB::QAR2(F),XR(g)
      • Refutation
        • R(g);
    • Try
      • R(C);CHECK
      • Vars
        • K(d);N_SPINP(c),P-FLIGHT::QAR1(F)
      • Refutation
        • P(h);XR(C)
    • Try
      • R(C);
      • Vars
        • K(d);N_SPINP(c),P-FLIGHT::QAR1(F)
        • R(g);SBLOCK::QAR2(F)
        • R(g);OGATEB::QAR2(F),XR(g)
      • Refutation
        • R(g);
  • Actual
    • R(C);
    • Vars
      • K(d);N_SPINP(c),P-FLIGHT::QAR1(F)
      • R(g);SBLOCK::QAR2(F)
      • R(g);SBLOCK::R(C),XP(a)
      • R(g);OGATEB::QAR2(F),XR(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).