MESON Chess Problem Database

Problem Display
PID: 51477 (bb6/q1p1N3/1p3NP1/r5P1/1R2p2k/2p4p/3BB2P/Qn5K w - - 0 1)

Ravenscroft, Frank

The Guardian, 1961

bb6/q1p1N3/1p3NP1/r5P1/1R2p2k/2p4p/3BB2P/Qn5K

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa1
      • 2.Sf5#
    • 1...Ra2
      • 2.Sf5#
    • 1...Ra3
      • 2.Sf5#
    • 1...Ra4
      • 2.Sf5#
    • 1...Rd5
      • 2.Rxe4#
    • 1...Rf5
      • 2.Sxf5#
    • 1...Ra6
      • 2.Sf5#
    • 1...Bd5
      • 2.Sf5#
    • 1...Sa3
      • 2.Qe1#
    • 1...b5
      • 2.Sf5#
    • 1...c5
      • 2.Sf5#
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Be1#
      • 1...Bxe4+
        • 2.Rxe4#
      • 1...Rxg5
        • 2.Bxg5#
      • 1...Sxd2
        • 2.Qe1#
      • 1...cxd2
        • 2.Qh8#
      • 1...Rf5
        • 2.Sxf5#
      • 1...b5
        • 2.Sf5#
      • 1...c5
        • 2.Sf5#
      • 1...c6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • R(f);N_GUARD,XQ(A)::S(J)
    • R(f);N_GUARD::S(J)
    • R(f);S_CUTB(j)::R(F),XP(d)
    • R(f);N_GUARD::S(J),XR(f)
    • B(j);S_CUTR(f)::S(J)
    • S(a);OGATE::QAB(A)
    • P(g);S_CUTR(f)::S(J)
    • P(i);S_CUTR(f)::S(J)
  • Actual
    • S(H);P_SPINS(H),XP(d)
    • Threat
      • B(C)
    • Vars
      • B(j);CHECK,OGATE,P_SPINB(j),XS(H)::R(F),XB(j)
      • R(f);OGATE,XP(G)::B(C),XR(f)
      • S(a);OGATE,XB(C)::QAB(A)
      • P(b);OGATE,XB(C)::QAR(A)
      • R(f);N_GUARD::S(J),XR(f)
      • P(g);S_CUTR(f)::S(J)
      • P(i);S_CUTR(f)::S(J)
      • P(i);N_PINS(H)::R(F)+S(H)
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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).