MESON Chess Problem Database

Problem Display
PID: 84193 (8/2PpQ3/1p2p3/1P2k1P1/7K/3PP3/3P4/8 w - - 0 1)

Drazkowski, Krzysztof

Probleemblad, 1989

8/2PpQ3/1p2p3/1P2k1P1/7K/3PP3/3P4/8

#2

8 + 4

6490 yacpdb 2009
5454 Near Snap 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qf6#
  • Tries
    • 1.Qf6+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kd6!
    • 1.Qg7+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf5
        • 2.Qf6#
      • 1...Kd6!
    • 1.e4?
      • 1...Kd4
        • 2.Qd6#
      • 1...Kf4
        • 2.Qf6#
      • 1...d6
        • 2.Qf6#
      • 1...d5!
    • 1.c8Q?
      • 1...Kf5
        • 2.Qf6#
      • 1...d5
        • 2.Qcxe6#
        • 2.Qexe6#
      • 1...d6
        • 2.Qcxe6#
        • 2.Qexe6#
      • 1...Kd5!
    • 1.c8S?
      • 1...Kd5
        • 2.Qd6#
      • 1...Kf5
        • 2.Qf6#
      • 1...d5
        • 2.Qf6#
      • 1...d6!
    • 1.c8B?
      • 1...Kf5
        • 2.Qf6#
      • 1...d5
        • 2.Qxe6#
      • 1...d6
        • 2.Qxe6#
      • 1...Kd5!
  • Keys
    • 1.Qb4!
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf5
        • 2.Qe4#
      • 1...d5
        • 2.Qf4#
      • 1...d6
        • 2.Qe4#

Anticipated by 140981(1972)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINP(c),P-FLIGHT::QAR1(H)
  • Tries
    • Try
      • Q(H);CHECK,N_PINP(c)
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(H)
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT
    • Try
      • Q(H);CHECK,N_PINP(c)
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(H)
        • K(a);P-FLIGHT::QAR1(H)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(C);
      • Vars
        • K(a);N_SPINP(c),S_FLIGHT::QAR2(H)
        • P(d);SBLOCK::QAB1(H)
      • Refutation
        • P(d);
    • Try
      • P(G);
      • Vars
        • K(a);N_SPINP(c),P-FLIGHT::QAR1(H)
      • Refutation
        • K(a);N_SPINP(c),P-FLIGHT
    • Try
      • P(G);
      • Vars
        • K(a);N_SPINP(c),P-FLIGHT::QAR1(H)
        • P(d);SBLOCK::QAB1(H)
      • Refutation
        • P(d);
    • Try
      • P(G);
      • Vars
        • K(a);N_SPINP(c),P-FLIGHT::QAR1(H)
        • P(d);N_GUARD::QAR1(H),XP(c)
      • Refutation
        • K(a);N_SPINP(c),P-FLIGHT
  • Actual
    • Q(H);N_PINP(c)
    • Vars
      • K(a);P-FLIGHT::QAR1(H)
      • K(a);P-FLIGHT::QAB1(H)
      • P(d);SBLOCK::QAB1(H)
      • P(d);SBLOCK::QAR1(H)
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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).