MESON Chess Problem Database

Problem Display
PID: 189964 (r7/1Q2B3/8/k3K3/8/2n5/P7/8 w - - 0 1)

Forster, Fritz

Source?, 1913

r7/1Q2B3/8/k3K3/8/2n5/P7/8

#2

4 + 3

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Qb4#
    • 1...Ra6
      • 2.Qb4#
    • 1...Sa4
      • 2.Bb4#
  • Tries
    • 1.Bd8+?
      • 1...Ka4
        • 2.Qb3#
      • 1...Rxd8!
    • 1.Qb6+?
      • 1...Ka4
        • 2.Qb4#
      • 1...Kxb6!
  • Keys
    • 1.a4!
      • 1...Kxa4
        • 2.Qb4#
      • 1...Sxa4
        • 2.Bb4#
      • 1...Ra6
        • 2.Qb4#
      • 1...Ra7
        • 2.Qxa7#
      • 1...Rb8
        • 2.Qa7#
      • 1...Rc8
        • 2.Qa7#
      • 1...Rd8
        • 2.Qa7#
      • 1...Re8
        • 2.Qa7#
      • 1...Rf8
        • 2.Qa7#
      • 1...Rg8
        • 2.Qa7#
      • 1...Rh8
        • 2.Qa7#
      • 1...Sb1
        • 2.Qb5#
      • 1...Sd1
        • 2.Qb5#
      • 1...Sa2
        • 2.Qb5#
      • 1...Se2
        • 2.Qb5#
      • 1...Se4
        • 2.Qb5#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sd5
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 15
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(C)
    • R(c);SBLOCK::QAB1(C)
    • S(a);SBLOCK::B(D)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(C)
      • Refutation
        • R(c);XB(D)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
  • Actual
    • P(A);
    • Vars
      • K(b);P-FLIGHT,XP(A)::QAR1(C)
      • S(a);SBLOCK,XP(A)::B(D)
      • R(c);SBLOCK::QAB1(C)
      • R(c);N_GUARD::QAR2(C),XR(c)
      • R(c);N_GUARD::QAR2(C)
      • R(c);N_GUARD,P_PINB(D)::QAR2(C)
      • S(a);N_GUARD::QAR1(C)
      • S(a);N_GUARD::QAR1(C),XS(a)
HTML5 logo

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).