MESON Chess Problem Database

Problem Display
PID: 222730 (8/4B3/3N2R1/6bR/1kP5/2N5/P7/4Q2K w - - 0 1)

Stein, P

Charleston Sunday News, 1884

8/4B3/3N2R1/6bR/1kP5/2N5/P7/4Q2K

#2

9 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ka5
      • 2.Sb7#
  • Tries
    • 1.Qe5?
      • 1...Bxe7
        • 2.Qa5#
      • 1...Bc1
        • 2.Qa5#
      • 1...Bd2
        • 2.Qa5#
      • 1...Be3
        • 2.Qa5#
      • 1...Bf4
        • 2.Qa5#
      • 1...Bh4
        • 2.Qa5#
      • 1...Bf6
        • 2.Qa5#
      • 1...Bh6
        • 2.Qa5#
      • 1...Ka3!
  • Keys
    • 1.Qe2!
      • 1...Ka3
        • 2.Sdb5#
      • 1...Kxc3
        • 2.Sb5#
      • 1...Ka5
        • 2.Sb7#
      • 1...Kc5
        • 2.Sdb5#
      • 1...Bxe7
        • 2.Qb2#
      • 1...Bc1
        • 2.Sde4#
      • 1...Bd2
        • 2.Sde4#
      • 1...Be3
        • 2.Qb2#
      • 1...Bf4
        • 2.Qb2#
      • 1...Bh4
        • 2.Qb2#
      • 1...Bf6
        • 2.Qb2#
      • 1...Bh6
        • 2.Sde4#
        • 2.Qb2#

There are these versions: 10967

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • K(a);P_SPINB(b),S_FLIGHT::S(G)
  • Tries
    • Try
      • Q(A);
      • Vars
        • B(b);XB(I)::QAB1(A)
        • B(b);::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::B(I)+S(G),DCHECK
      • K(a);S_FLIGHT,XS(D)::S(G)
      • K(a);P_SPINB(b),S_FLIGHT::S(G)
      • K(a);P_SPINB(b),S_FLIGHT::B(I)+S(G)
      • B(b);XB(I)::QAR2(A)
      • B(b);N_GUARD::B(I)+S(G)
      • B(b);::QAR2(A)
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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).