MESON Chess Problem Database

Problem Display
PID: 44850 (3R1b1r/3N2p1/1KP3nr/Q1Pk1PR1/1Bp3Bp/5P2/b3N3/2qn4 w - - 0 1)

Daniel, Arthur William

Recomm., BCF 043. Ty., 1942-1943

3R1b1r/3N2p1/1KP3nr/Q1Pk1PR1/1Bp3Bp/5P2/b3N3/2qn4

#2

12 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.fxg6#
    • 1...Bxc5+
      • 2.Qxc5#
    • 1...Bd6
      • 2.cxd6#
    • 1...Sf4
      • 2.f6#
    • 1...Se5
      • 2.Sf6#
    • 1...c3
      • 2.Qxa2#
  • Tries
    • 1.Se5+?
      • 1...Bd6
        • 2.cxd6#
      • 1...Kxe5!
    • 1.Sb8+?
      • 1...Bd6
        • 2.cxd6#
      • 1...Ke5!
    • 1.f6+?
      • 1...Se5
        • 2.Sxf8#
        • 2.Rxe5#
      • 1...Qxg5!
  • Keys
    • 1.c7!
      • threat
        • 2.Qa8#
      • 1...Bxc5+
        • 2.Qxc5#
      • 1...Sf4+
        • 2.f6#
      • 1...Se5+
        • 2.Sf6#
      • 1...Se7+
        • 2.c6#
      • 1...c3
        • 2.Qxa2#
      • 1...Qa3
        • 2.fxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(a);N_GUARD::R(H)+P(G),XS(g)
    • B(j);CHECK,OGATE,P_SPINB(j),XP(F)::QAR1(E),XB(j)
    • B(j);OGATE::QAR(E)+P(F),XB(j)
    • S(g);N_GUARD,P_PINP(J),S_CUTQ(a)::R(H)+P(G)
    • S(g);P_PINP(J),SBLOCK::R(L)+S(K),DCHECK
    • P(d);OGATEB::QAB(E),XB(c)
  • Tries
    • Try
      • S(K);CHECK
      • Vars
        • B(j);OGATE,P_SPINB(j)::QAR(E)+P(F),XB(j)
      • Refutation
        • K(f);P-FLIGHT,XS(K)
    • Try
      • S(K);CHECK
      • Vars
        • B(j);OGATE,P_SPINB(j)::QAR(E)+P(F),XB(j)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • P(G);CHECK
      • Refutation
        • Q(a);XR(H)
  • Actual
    • P(J);
    • Threat
      • QAB(E)
    • Vars
      • B(j);CHECK,OGATE,P_SPINB(j),XP(F)::QAR1(E),XB(j)
      • S(g);CHECK,N_GUARD,S_CUTQ(a)::R(H)+P(G)
      • S(g);CHECK,SBLOCK::R(L)+S(K),DCHECK
      • S(g);CHECK,S_CUTB(j)::QAR(E)+P(F)
      • P(d);OGATEB::QAB(E),XB(c)
      • Q(a);N_GUARD::R(H)+P(G),XS(g)
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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).