MESON Chess Problem Database

Problem Display
PID: 199304 (8/8/2p1p3/2Pk4/Pp2p3/1N6/1P2K1Q1/8 w - - 0 1)

Albregts, W

Haagsche Courant, 1896

8/8/2p1p3/2Pk4/Pp2p3/1N6/1P2K1Q1/8

#2

6 + 5

5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qg5#
    • 1...e5
      • 2.Qg8#
  • Tries
    • 1.Kd1?
      • 1...Ke5
        • 2.Qg5#
      • 1...e5
        • 2.Qg8#
      • 1...Kc4!
    • 1.Ke1?
      • 1...Ke5
        • 2.Qg5#
      • 1...e5
        • 2.Qg8#
      • 1...Kc4!
    • 1.Kf1?
      • 1...Ke5
        • 2.Qg5#
      • 1...e5
        • 2.Qg8#
      • 1...Kc4!
    • 1.Kd2?
      • 1...Ke5
        • 2.Qg5#
      • 1...e5
        • 2.Qg8#
      • 1...Kc4!
    • 1.Kf2?
      • 1...Ke5
        • 2.Qg5#
      • 1...e5
        • 2.Qg8#
      • 1...Kc4!
    • 1.Ke3?
      • threat
        • 2.Qxe4#
      • 1...Ke5
        • 2.Qg5#
      • 1...e5
        • 2.Qg8#
      • 1...Kc4!
    • 1.Qg5+?
      • 1...e5
        • 2.Qg8#
      • 1...Kc4!
    • 1.Qg6?
      • 1...Kc4
        • 2.Qxe6#
      • 1...Ke5
        • 2.Qg5#
      • 1...e5
        • 2.Qf7#
        • 2.Qg8#
      • 1...e3!
    • 1.Qg7?
      • threat
        • 2.Qd4#
      • 1...e5
        • 2.Qf7#
        • 2.Qg8#
      • 1...Kc4!
    • 1.Qg8?
      • 1...Kc4
        • 2.Qxe6#
      • 1...Ke5
        • 2.Qg5#
      • 1...e3!
    • 1.a5?
      • 1...Ke5
        • 2.Qg5#
      • 1...e5
        • 2.Qg8#
      • 1...Kc4!
  • Keys
    • 1.Qg4!
      • 1...Kc4
        • 2.Qxe6#
      • 1...Ke5
        • 2.Qg5#
      • 1...e3
        • 2.Qd4#
      • 1...e5
        • 2.Qg8#

This anticipates 193603(1915)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINP(b),P-FLIGHT::QAR2(C)
    • P(e);OGATEB,SBLOCK::QAB(C)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR2(C)
        • P(e);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR2(C)
        • P(e);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR2(C)
        • P(e);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR2(C)
        • P(e);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR2(C)
        • P(e);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
    • Try
      • K(B);P-FLIGHT
      • Threat
        • QAB1(C),XP(b)
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR2(C)
        • P(e);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Vars
        • P(e);OGATEB,P_SPINP(e),SBLOCK::QAB(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);N_PINP(b)
      • Vars
        • K(c);S_FLIGHT::QAB(C),XP(e)
        • K(c);P-FLIGHT::QAR2(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);N_PINP(b)
      • Threat
        • QAR1(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);N_PINP(b),P_PINP(e)
      • Vars
        • K(c);S_FLIGHT::QAB(C),XP(e)
        • K(c);N_SPINP(e),P-FLIGHT::QAR2(C)
      • Refutation
        • P(b);
    • Try
      • P(E);
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR2(C)
        • P(e);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
  • Actual
    • Q(C);N_PINP(b)
    • Vars
      • K(c);P_SPINP(b),S_FLIGHT::QAB(C),XP(e)
      • K(c);P-FLIGHT::QAR2(C)
      • P(b);OGATE::QAR1(C)
      • P(e);OGATEB,SBLOCK::QAB(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).