MESON Chess Problem Database

Problem Display
PID: 196973 (8/8/1R6/R1p2pb1/1pk5/7Q/4K3/B3n3 w - - 0 1)

Massmann, Wilhelm Karl Heinrich

Deutsches Wochenschach, 1919

8/8/1R6/R1p2pb1/1pk5/7Q/4K3/B3n3

#2

5 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qd3#
    • 1...Sg2
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...b3
      • 2.Qxb3#
    • 1...f4
      • 2.Qe6#
  • Tries
    • 1.Qxf5?
      • threat
        • 2.Qe6#
        • 2.Qf7#
      • 1...Bf6
        • 2.Qe6#
      • 1...Kb3!
    • 1.Qc3+?
      • 1...Kd5
        • 2.Qd4#
      • 1...bxc3!
    • 1.Qe3?
      • threat
        • 2.Rxc5#
        • 2.Qe6#
      • 1...Kd5
        • 2.Rxc5#
        • 2.Qd4#
        • 2.Qe6#
      • 1...Sd3
        • 2.Qxd3#
        • 2.Qe6#
      • 1...Be7
        • 2.Qe6#
      • 1...Bxe3!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qg8#
      • 1...Kb3
        • 2.Qc3#
      • 1...Kd5
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
    • P(b);::QAB1(C),XP(b)
    • P(e);OGATE::QAB(C)
  • Tries
    • Try
      • Q(C);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(f);::QAB(C)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P_SPINP(d),S_FLIGHT::QAR1(C)
      • Refutation
        • P(b);XQ(C)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(f);::QAB(C)
      • Refutation
        • B(f);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)
    • Vars
      • K(c);P_SPINP(b),S_FLIGHT::QAR1(C)
      • K(c);P_SPINP(d),S_FLIGHT::QAR1(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).