MESON Chess Problem Database

Problem Display
PID: 195122 (4B2Q/K5B1/8/8/1kp1P3/7P/8/8 w - - 0 1)

Wastl, Rudolf

Reichspost, 1918

4B2Q/K5B1/8/8/1kp1P3/7P/8/8

#2

6 + 2

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ka5
      • 2.Bc3#
    • 1...Kc5
      • 2.Bf8#
      • 2.Qf8#
  • Tries
    • 1.Bb2?
      • 1...Ka5
        • 2.Bc3#
        • 2.Qc3#
      • 1...Kc5
        • 2.Ba3#
        • 2.Qf8#
      • 1...c3
        • 2.Qxc3#
      • 1...Kb3!
    • 1.Bf8+?
      • 1...Ka5
        • 2.Qa1#
        • 2.Qc3#
        • 2.Qe5#
        • 2.Qh5#
      • 1...Kb3!
    • 1.Qf8+?
      • 1...Ka5
        • 2.Bc3#
        • 2.Qa3#
        • 2.Qc5#
      • 1...Kb3!
  • Keys
    • 1.Ba1!
      • 1...Ka3
        • 2.Qb2#
      • 1...Kb3
        • 2.Qb2#
      • 1...Ka5
        • 2.Bc3#
        • 2.Qc3#
      • 1...Kc5
        • 2.Qf8#
      • 1...c3
        • 2.Qxc3#

This anticipates 121471(1954)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(a);S_FLIGHT::B(D)
  • Tries
    • Try
      • B(D);
      • Vars
        • P(b);::QAB1(F),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(D);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(D);
    • Vars
      • K(a);S_FLIGHT::QAB1(F)
      • K(a);P-FLIGHT::QAR1(F)
      • K(a);S_FLIGHT::QAB(F)
      • P(b);::QAB1(F),XP(b)
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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).