MESON Chess Problem Database

Problem Display
PID: 232343 (1K6/8/k7/2Q5/2q5/3B4/3n4/8 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1973

1K6/8/k7/2Q5/2q5/3B4/3n4/8

#2

3 + 3

15148 Sadier Collection 2021
5454 Near Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5+
      • 2.Qxb5#
    • 1...Sb1
      • 2.Bxc4#
    • 1...Sf1
      • 2.Bxc4#
    • 1...Sb3
      • 2.Bxc4#
    • 1...Sf3
      • 2.Bxc4#
    • 1...Se4
      • 2.Bxc4#
  • Tries
    • 1.Ka8?
      • 1...Qb5
        • 2.Qa7#
        • 2.Qxb5#
      • 1...Sb1
        • 2.Bxc4#
      • 1...Sf1
        • 2.Bxc4#
      • 1...Sb3
        • 2.Bxc4#
      • 1...Sf3
        • 2.Bxc4#
      • 1...Se4
        • 2.Bxc4#
      • 1...Qxd3!
    • 1.Qb4?
      • 1...Qb5+
        • 2.Qxb5#
      • 1...Sb1
        • 2.Bxc4#
      • 1...Sf1
        • 2.Bxc4#
      • 1...Sb3
        • 2.Bxc4#
      • 1...Sf3
        • 2.Bxc4#
      • 1...Se4
        • 2.Bxc4#
      • 1...Qxd3!
    • 1.Qxc4+?
      • 1...Ka5
        • 2.Qb5#
      • 1...Kb6
        • 2.Qb5#
        • 2.Qc7#
      • 1...Sxc4!
  • Keys
    • 1.Kc7!
      • 1...Qxd3
        • 2.Qb6#
      • 1...Qb5
        • 2.Qa3#
        • 2.Qb6#
      • 1...Sb1
        • 2.Bxc4#
      • 1...Sf1
        • 2.Bxc4#
      • 1...Sb3
        • 2.Bxc4#
      • 1...Sf3
        • 2.Bxc4#
      • 1...Se4
        • 2.Bxc4#

This anticipates 270987(1995)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(b);CHECK,N_GUARD::QAB1(B),XQ(b)
    • S(a);N_GUARD::B(A),XQ(b)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • S(a);N_GUARD::B(A),XQ(b)
      • Refutation
        • Q(b);N_SPINQ(b),XB(A)
    • Try
      • Q(B);
      • Vars
        • Q(b);CHECK,N_GUARD::QAB1(B),XQ(b)
        • S(a);N_GUARD::B(A),XQ(b)
      • Refutation
        • Q(b);N_SPINQ(b),XB(A)
    • Try
      • Q(B);CHECK,XQ(b)
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
      • Refutation
        • S(a);P_SPINS(a),XQ(B)
  • Actual
    • K(C);P_SPINQ(B),S_FLIGHT
    • Vars
      • Q(b);N_PINQ(B),N_SPINQ(b),XB(A)::QAR1(B)
      • S(a);N_GUARD::B(A),XQ(b)
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).