MESON Chess Problem Database

Problem Display
PID: 271487 (2r1Q2q/5b2/3Pn3/BP1R2p1/1P2P1N1/N1k1P1R1/K2pp3/b2r4 w - - 0 1)

Hawes, Frederick Thomas

Ravenscroft, Frank

The Problemist, 1956

2r1Q2q/5b2/3Pn3/BP1R2p1/1P2P1N1/N1k1P1R1/K2pp3/b2r4

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.exd4#
    • 1...Rc5
      • 2.bxc5#
    • 1...Sd4
      • 2.exd4#
    • 1...Sf4
      • 2.exf4#
    • 1...Sc5
      • 2.bxc5#
    • 1...Sc7
      • 2.Qc6#
    • 1...Sg7
      • 2.Qe5#
    • 1...Sd8
      • 2.Qxh8#
    • 1...Sf8
      • 2.Qxc8#
  • Tries
    • 1.Qc6+?
      • 1...Sc5
        • 2.bxc5#
      • 1...Rxc6!
    • 1.Qxc8+?
      • 1...Sc5
        • 2.Qxc5#
        • 2.Qxh8#
        • 2.bxc5#
      • 1...Sc7
        • 2.Qxc7#
        • 2.Qxh8#
      • 1...Qxc8!
    • 1.Qxh8+?
      • 1...Sd4
        • 2.Qxd4#
        • 2.exd4#
      • 1...Sg7
        • 2.Qxg7#
        • 2.Qxc8#
      • 1...Rxh8!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Rd3#
      • 1...e1S
        • 2.Sxd1#
      • 1...Qd4
        • 2.exd4#
      • 1...Sd4
        • 2.exd4#
      • 1...Sf4
        • 2.exf4#
      • 1...Sc5
        • 2.bxc5#
      • 1...Sc7
        • 2.Qc6#
      • 1...Sg7
        • 2.Qe5#
      • 1...Sd8
        • 2.Qxh8#
      • 1...Sf8
        • 2.Qxc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(j);OGATE::R(D)+P(C),XQ(j)
    • R(i);OGATE::B(H)+P(E),XR(i)
    • S(g);OGATE,P_PINR(J)::R(D)+P(C),XS(g)
    • S(g);OGATE,P_PINR(J)::B(H)+P(E),XS(g)
    • S(g);N_GUARD,P_PINR(J),S_CUTR(i)::QAR(L)
    • S(g);OGATE,P_PINR(J)::QAB(L)
    • S(g);N_GUARD,P_PINR(J),S_CUTR(i)::QAB(L),XQ(j)
    • S(g);N_GUARD,P_PINR(J),S_CUTQ(j)::QAR(L),XR(i)
  • Tries
    • Try
      • Q(L);CHECK
      • Vars
        • S(g);OGATE,P_PINR(J),P_SPINS(g)::B(H)+P(E),XS(g)
      • Refutation
        • R(i);XQ(L)
    • Try
      • Q(L);CHECK,XR(i)
      • Refutation
        • Q(j);XQ(L)
    • Try
      • Q(L);CHECK,XQ(j)
      • Refutation
        • R(i);XQ(L)
  • Actual
    • S(G);
    • Threat
      • R1(J)
    • Vars
      • P(d);N_GUARD::S(G),XR(b)
      • Q(j);OGATE::R(D)+P(C),XQ(j)
      • S(g);OGATE,P_PINR(J)::R(D)+P(C),XS(g)
      • S(g);OGATE,P_PINR(J)::B(H)+P(E),XS(g)
      • S(g);N_GUARD,P_PINR(J),S_CUTR(i)::QAR(L)
      • S(g);OGATE,P_PINR(J)::QAB(L)
      • S(g);N_GUARD,P_PINR(J),S_CUTR(i)::QAB(L),XQ(j)
      • S(g);N_GUARD,P_PINR(J),S_CUTQ(j)::QAR(L),XR(i)
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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).