MESON Chess Problem Database

Problem Display
PID: 264964 (6Rn/5B1N/3BKP1k/rp6/4Qp2/b4rp1/2p2p2/2qb4 w - - 0 1)

Verhoef, J

Probleemblad, 1949

6Rn/5B1N/3BKP1k/rp6/4Qp2/b4rp1/2p2p2/2qb4

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Bxf4#
    • 1...Bb2
      • 2.Bf8#
    • 1...Sg6
      • 2.Qxg6#
    • 1...Sxf7
      • 2.Qg6#
    • 1...b4
      • 2.Bf8#
  • Tries
    • 1.Sf8?
      • threat
        • 2.Qh7#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Re3
        • 2.Bxf4#
      • 1...Qe3!
    • 1.Rg6+?
      • 1...Kxh7
        • 2.Bg8#
      • 1...Sxg6
        • 2.Qxg6#
      • 1...Kh5!
    • 1.Rxh8?
      • threat
        • 2.Qg6#
      • 1...Re3
        • 2.Bxf4#
      • 1...Qe3!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Rh4#
      • 1...Sg6
        • 2.Qxg6#
      • 1...Rb3
        • 2.Qh1#
      • 1...Rc3
        • 2.Qh1#
      • 1...Rd3
        • 2.Qh1#
      • 1...Re3
        • 2.Bxf4#
      • 1...b4
        • 2.Bf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(f);N_GUARD,P_PINQ(A),S_CUTQ(a)::B(B),XP(h)
    • B(e);N_GUARD::B(B)
    • S(l);N_GUARD::QAR1(A),XS(l)
    • S(l);N_GUARD,XB(E)::QAR1(A)
    • P(j);S_CUTB(e)::B(B)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(A)
      • Vars
        • S(l);N_GUARD::QAR1(A),XS(l)
        • R(f);N_GUARD,P_PINQ(A),S_CUTQ(a)::B(B),XP(h)
      • Refutation
        • Q(a);P_PINQ(A)
    • Try
      • R(G);CHECK
      • Vars
        • K(k);N_GUARD,P-FLIGHT,S_CUTS(l),XS(F)::B(E)
        • S(l);OGATE,XR(G)::QAR1(A),XS(l)
      • Refutation
        • K(k);P-FLIGHT
    • Try
      • R(G);XS(l)
      • Threat
        • QAR1(A)
      • Vars
        • R(f);N_GUARD,P_PINQ(A),S_CUTQ(a)::B(B),XP(h)
      • Refutation
        • Q(a);P_PINQ(A)
  • Actual
    • R(G);
    • Threat
      • R(G)
    • Vars
      • S(l);N_GUARD::QAR1(A),XS(l)
      • R(f);OGATE::QAR(A)
      • R(f);N_GUARD,P_PINQ(A),S_CUTQ(a)::B(B),XP(h)
      • P(j);S_CUTB(e)::B(B)
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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).