MESON Chess Problem Database

Problem Display
PID: 53791 (8/p1b1RQ2/6n1/3p2P1/1P1k4/5n2/1KPNb3/8 w - - 0 1)

Beito, RC

The Chess Review, 1935

8/p1b1RQ2/6n1/3p2P1/1P1k4/5n2/1KPNb3/8

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.c3#
    • 1...Bc4
      • 2.Sxf3#
    • 1...Se1
      • 2.Qf2#
    • 1...Sg1
      • 2.Qf2#
    • 1...Sh2
      • 2.Qf2#
    • 1...Sfh4
      • 2.Qf2#
    • 1...Sfe5
      • 2.Qf2#
    • 1...Sxg5
      • 2.Qf2#
    • 1...Sge5
      • 2.Qf4#
  • Tries
    • 1.Qxf3?
      • threat
        • 2.Qf2#
        • 2.Qc3#
        • 2.Qe3#
        • 2.c3#
      • 1...Sxe7
        • 2.Qc3#
      • 1...Bd3
        • 2.Qf2#
        • 2.Qxd3#
        • 2.Qe3#
        • 2.c3#
      • 1...Bg3
        • 2.Qc3#
        • 2.Qe3#
        • 2.c3#
      • 1...Bf4
        • 2.Qc3#
        • 2.c3#
      • 1...Be5
        • 2.Qf2#
        • 2.Qc3#
        • 2.c3#
      • 1...Se5
        • 2.Qf2#
        • 2.Qc3#
        • 2.Qf4#
        • 2.c3#
      • 1...Bxf3!
    • 1.Qf6+?
      • 1...Sfe5
        • 2.Qf2#
      • 1...Sge5
        • 2.Qf4#
      • 1...Be5!
  • Keys
    • 1.Re5!
      • threat
        • 2.Qxd5#
      • 1...Kxe5
        • 2.Qf6#
      • 1...Bxe5
        • 2.Qxa7#
      • 1...Sfxe5
        • 2.Qf2#
      • 1...Sgxe5
        • 2.Qf4#
      • 1...Bc4
        • 2.Sxf3#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Se7
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • B(a);SBLOCK::P(B)
    • B(a);N_GUARD,SBLOCK::S(C),XS(b)
    • S(b);OGATE::QAB(G)
    • S(b);OGATE,XP(E)::QAB(G)
    • S(e);N_GUARD,S_CUTB(g)::QAR2(G)
  • Tries
    • Try
      • Q(G);XS(b)
      • Threat
        • DUALS(4)
      • Vars
        • S(e);XR(F)::QAB1(G)
      • Refutation
        • B(a);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • S(b);OGATE,P_SPINS(b)::QAB(G)
        • S(e);N_GUARD,P_SPINS(e),S_CUTB(g)::QAR2(G)
      • Refutation
        • B(g);P_SPINB(g)
  • Actual
    • R(F);
    • Threat
      • QAR1(G),XP(d)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XR(F)::QAB1(G)
      • B(g);OGATE,SBLOCK,XR(F)::QAB(G),XP(f)
      • S(b);OGATE,SBLOCK,XR(F)::QAB(G)
      • S(e);N_GUARD,XR(F)::QAR2(G)
      • B(a);N_GUARD,SBLOCK::S(C),XS(b)
      • S(e);N_GUARD::QAR2(G),XS(e)
      • S(e);N_GUARD::QAR2(G)
HTML5 logo

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).