MESON Chess Problem Database

Problem Display
PID: 146036 (4QBB1/2R2Pq1/R2p2kp/2P2p1p/2Kp1p1P/3P1P2/8/8 w - - 0 1)

Promislo, Charles

Good Companions (January black Queen), 1918

4QBB1/2R2Pq1/R2p2kp/2P2p1p/2Kp1p1P/3P1P2/8/8

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Rxd6#
    • 1...Qxf7+
      • 2.Qxf7#
    • 1...Qh7
      • 2.Rxd6#
      • 2.Qe6#
    • 1...Qxg8
      • 2.fxg8S#
  • Tries
    • 1.Bh7+?
      • 1...Kf6
        • 2.Rxd6#
        • 2.Qe7#
      • 1...Qxh7
        • 2.Rxd6#
        • 2.Qe6#
      • 1...Kxh7!
  • Keys
    • 1.Bxd6!
      • 1...Qxf7+
        • 2.Qxf7#
      • 1...Kf6
        • 2.Bxf4#
        • 2.Be5#
        • 2.Bf8#
      • 1...Qxg8
        • 2.fxg8S#
      • 1...Qe5
        • 2.Bxe5#
      • 1...Qf8
        • 2.Bxf8#
      • 1...Qh8
        • 2.f8Q#
        • 2.f8R#
      • 1...Qh7
        • 2.Be5#
        • 2.Bf8#
      • 1...Qf6
        • 2.f8S#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(f);P-FLIGHT::R(F),XP(e)
    • Q(h);CHECK,OGATE,P_SPINQ(h),XP(H)::QAB1(I),XQ(h)
    • Q(h);OGATE,P_PINP(H),XB(K)::PXQ(h)=S
  • Tries
    • Try
      • B(K);CHECK
      • Refutation
        • K(f);N_SPINP(e),S_FLIGHT,XB(K)
  • Actual
    • B(J);XP(e)
    • Vars
      • Q(h);CHECK,OGATE,P_SPINQ(h),XP(H)::QAB1(I),XQ(h)
      • Q(h);OGATE,P_PINP(H),XB(K)::PXQ(h)=S
      • Q(h);N_GUARD::R(F)+B(J),XQ(h)
      • Q(h);N_GUARD::P=Q
      • Q(h);N_GUARD,SBLOCK::P=S
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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).