MESON Chess Problem Database

Problem Display
PID: 141767 (7B/QP1rpqR1/2R2n2/3Pk1N1/P6n/2p1NpP1/8/2K5 w - - 0 1)

Bosma, Rinke

Probleemblad, 1977

7B/QP1rpqR1/2R2n2/3Pk1N1/P6n/2p1NpP1/8/2K5

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qh5
      • 2.Re6#
    • 1...Qe6
      • 2.Rxe6#
    • 1...Qg6
      • 2.Re6#
    • 1...Qe8
      • 2.Re6#
    • 1...Qxg7
      • 2.Re6#
    • 1...Qf8
      • 2.Re6#
    • 1...Se4
      • 2.Sxf7#
  • Tries
    • 1.Sc4+?
      • 1...Kxd5
        • 2.Qc5#
      • 1...Kf5!
    • 1.Rxf7?
      • threat
        • 2.Re6#
      • 1...e6
        • 2.Bxf6#
        • 2.Rxe6#
      • 1...Rd6!
    • 1.b8Q+?
      • 1...Rc7
        • 2.Qbxc7#
      • 1...Rd6!
    • 1.b8B+?
      • 1...Rc7
        • 2.Bxc7#
      • 1...Rd6!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qxc3#
      • 1...Qxd5
        • 2.Re6#
      • 1...Rxd5
        • 2.b8Q#
        • 2.b8B#
      • 1...Sxd5
        • 2.Rxf7#
      • 1...Sf5
        • 2.Sc4#
      • 1...Se4
        • 2.Sxf7#
      • 1...c2
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(h);N_GUARD::R1(G)
    • Q(h);N_GUARD::R1(G),XQ(h)
    • Q(h);N_GUARD,XR(J)::R1(G)
    • S(e);SBLOCK::S(F),XQ(h)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(E)::QAR1(H)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • R(J);P_PINS(e),XQ(h)
      • Threat
        • R1(G)
      • Refutation
        • R(f);
    • Try
      • P(I);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAB(I),XR(f)
      • Refutation
        • R(f);P_SPINR(f)
    • Try
      • P(I);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::B(I),XR(f)
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • Q(H);
    • Threat
      • QAB(H),XP(a)
    • Vars
      • Q(h);N_GUARD,P_SPINQ(h),XP(E)::R1(G)
      • R(f);N_GUARD,P_SPINR(f),XP(E)::P=Q
      • S(e);OGATEB,P_SPINS(e),XP(E)::B(K)+R(J),XQ(h)
      • S(c);SBLOCK::S(B)
      • S(e);SBLOCK::S(F),XQ(h)
      • P(a);::QAB(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).