MESON Chess Problem Database

Problem Display
PID: 203397 (8/Q7/2K2p2/3Bk3/8/4p1P1/4P3/8 w - - 0 1)

Prokes, Ladislav

Studentsky casopis, 1924

8/Q7/2K2p2/3Bk3/8/4p1P1/4P3/8

#2

5 + 3

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qa1#
      • 2.Qg7#
  • Tries
    • 1.Kc5?
      • 1...f5
        • 2.Qa1#
        • 2.Qe7#
        • 2.Qg7#
      • 1...Kf5!
    • 1.Qc5?
      • 1...f5
        • 2.Qc3#
      • 1...Kf5!
    • 1.Qb6?
      • 1...f5
        • 2.Qb2#
      • 1...Kf5!
    • 1.Qb8+?
      • 1...Kd4
        • 2.Qb2#
      • 1...Kf5!
    • 1.Qa2?
      • 1...Kd4
        • 2.Qa1#
        • 2.Qb2#
      • 1...f5
        • 2.Qa1#
        • 2.Qb2#
      • 1...Kf5!
    • 1.Qa3?
      • 1...Kd4
        • 2.Qb2#
        • 2.Qa1#
      • 1...f5
        • 2.Qb2#
        • 2.Qa1#
        • 2.Qc3#
      • 1...Kf5!
    • 1.Qa4?
      • threat
        • 2.Qe4#
        • 2.Qf4#
      • 1...f5
        • 2.Qa1#
      • 1...Kf5!
    • 1.Qa5?
      • 1...Kd4
        • 2.Qa1#
      • 1...f5
        • 2.Qc3#
        • 2.Qa1#
      • 1...Kf5!
    • 1.Qa6?
      • 1...Kd4
        • 2.Qa1#
      • 1...f5
        • 2.Qa1#
      • 1...Kf5!
    • 1.Qb7?
      • 1...Kd4
        • 2.Qb2#
      • 1...f5
        • 2.Qb2#
        • 2.Qg7#
      • 1...Kf5!
    • 1.Qd7?
      • 1...f5
        • 2.Qg7#
      • 1...Kd4!
    • 1.Qe7+?
      • 1...Kd4
        • 2.Qxf6#
      • 1...Kf5!
    • 1.Qg7?
      • 1...Kd4
        • 2.Qxf6#
      • 1...Kf5!
    • 1.Qh7?
      • threat
        • 2.Qe4#
      • 1...f5
        • 2.Qg7#
        • 2.Qh8#
      • 1...Kd4!
    • 1.Qa8?
      • 1...Kd4
        • 2.Qa1#
      • 1...f5
        • 2.Qa1#
        • 2.Qh8#
      • 1...Kf5!
  • Keys
    • 1.Qf7!
      • 1...Kd4
        • 2.Qxf6#
      • 1...Kf5
        • 2.Qh5#
      • 1...f5
        • 2.Qg7#

Anticipated by 9537(1905)

This anticipates 47999(1948), 118247(1967)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • P(c);SBLOCK::QAB(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • P(c);SBLOCK::QAB(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);SBLOCK::QAB(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT::QAB(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT::QAB(E)
        • P(c);SBLOCK::QAB(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT::QAB(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(E),XP(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);P_PINP(c)
      • Vars
        • K(b);S_FLIGHT::QAB(E),XP(c)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT::QAB(E)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(b);S_FLIGHT::QAB(E),XP(c)
      • K(b);P-FLIGHT,P_SPINP(c)::QAR2(E)
      • P(c);OGATEB,SBLOCK::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).