MESON Chess Problem Database

Problem Display
PID: 210208 (1B4N1/5n2/KNkP1b2/1p1p3r/1P3Q2/p2R1n2/4r3/5b1B w - - 0 1)

Liew, Chee Meng

The Problemist, 1985

1B4N1/5n2/KNkP1b2/1p1p3r/1P3Q2/p2R1n2/4r3/5b1B

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ree5
      • 2.Qc1#
    • 1...Rhe5
      • 2.Rc3#
    • 1...Bc3
      • 2.Rxc3#
    • 1...Bh4
      • 2.Rc3#
    • 1...Be5
      • 2.Se7#
    • 1...Bg5
      • 2.Rc3#
    • 1...Be7
      • 2.Rc3#
    • 1...Bd8
      • 2.Rc3#
    • 1...Sd4
      • 2.Rc3#
    • 1...S3e5
      • 2.Bxd5#
    • 1...S3g5
      • 2.Bxd5#
    • 1...Sxd6
      • 2.Qxd6#
  • Tries
    • 1.Se7+?
      • 1...Bxe7
        • 2.Rc3#
      • 1...Rxe7!
    • 1.Qc1+?
      • 1...Bc3
        • 2.Rxc3#
        • 2.Qxc3#
      • 1...Rc2!
  • Keys
    • 1.d7!
      • threat
        • 2.Qc7#
      • 1...Ree5
        • 2.Qc1#
      • 1...Rhe5
        • 2.Rc3#
      • 1...Be5
        • 2.Se7#
      • 1...Bd8
        • 2.Rc3#
      • 1...S3e5
        • 2.Bxd5#
      • 1...S7e5
        • 2.Qxf6#
      • 1...Sd6
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD,S_CUTB(i)::QAR(D)
    • R(g);S_CUTB(i)::R(B)
    • B(i);N_GUARD::R(B),XB(i)
    • B(i);N_GUARD::R(B)
    • B(i);N_GUARD,S_CUTR(b)::S(I)
    • S(d);P_SPINP(f),S_CUTB(i)::R(B)
    • S(d);OGATE,P_SPINP(f)::B(A),XP(f)
    • S(j);OGATE,XP(G)::QAR1(D),XS(j)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • B(i);XS(I)::R(B)
      • Refutation
        • R(b);XS(I)
    • Try
      • Q(D);CHECK
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • P(G);
    • Threat
      • QAR1(D)
    • Vars
      • R(b);N_GUARD,S_CUTB(i)::QAR(D)
      • R(g);S_CUTB(i)::R(B)
      • B(i);N_GUARD,S_CUTR(b)::S(I)
      • B(i);N_GUARD::R(B)
      • S(d);OGATE,P_SPINP(f)::B(A),XP(f)
      • S(j);N_GUARD,S_CUTR(b)::QAR(D),XB(i)
      • S(j);N_GUARD::QAR1(D),XS(j)
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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).