MESON Chess Problem Database

Problem Display
PID: 44400 (R3b3/4N2r/6pn/1p1K4/1k1B3Q/8/B6n/7r w - - 0 1)

Gilberg, Charles Alexander

Source?, 0000

R3b3/4N2r/6pn/1p1K4/1k1B3Q/8/B6n/7r

#2

6 + 8

176 Crumbs from the Chess-board 1890

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qxe1#
    • 1...Rxe7
      • 2.Qxe7#
    • 1...Bc6+
      • 2.Sxc6#
  • Tries
    • 1.Bg1+?
      • 1...S2g4
        • 2.Qe1#
      • 1...S6g4
        • 2.Qe1#
      • 1...Kc3!
    • 1.Be3+?
      • 1...S2g4
        • 2.Bd2#
      • 1...S6g4
        • 2.Bd2#
      • 1...Kc3!
    • 1.Qf2?
      • threat
        • 2.Qb2#
        • 2.Qd2#
      • 1...Bc6+
        • 2.Sxc6#
      • 1...Rb1
        • 2.Qd2#
      • 1...Rc1
        • 2.Qb2#
      • 1...Rd1
        • 2.Qb2#
      • 1...Sf1
        • 2.Qb2#
      • 1...Sf3
        • 2.Qb2#
      • 1...Bf7+!
    • 1.Qg3?
      • threat
        • 2.Bc3#
        • 2.Bc5#
        • 2.Qd6#
        • 2.Qa3#
        • 2.Qb3#
        • 2.Qc3#
      • 1...Bc6+
        • 2.Sxc6#
      • 1...Rb1
        • 2.Bc3#
        • 2.Bc5#
        • 2.Qd6#
        • 2.Qa3#
        • 2.Qc3#
      • 1...Rc1
        • 2.Qa3#
        • 2.Qb3#
      • 1...Rd1
        • 2.Qd6#
        • 2.Qa3#
        • 2.Qb3#
        • 2.Qc3#
      • 1...Sf3
        • 2.Qd6#
      • 1...Sf5
        • 2.Bc3#
        • 2.Bc5#
        • 2.Qa3#
        • 2.Qb3#
        • 2.Qc3#
      • 1...Sf7
        • 2.Bc3#
        • 2.Bc5#
        • 2.Qa3#
        • 2.Qb3#
        • 2.Qc3#
      • 1...Bf7+!
  • Keys
    • 1.Ke4!
      • threat
        • 2.Sd5#
      • 1...Re1+
        • 2.Qxe1#
      • 1...Rxe7+
        • 2.Qxe7#
      • 1...Bc6+
        • 2.Sxc6#
      • 1...Bf7
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD::QAB(C),XR(a)
    • R(g);OGATE,XS(E)::QAB(C),XR(g)
    • B(h);CHECK,N_GUARD::S(E),XB(h)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • S(b);P_SPINS(b)::QAB(C)
        • S(f);P_SPINS(f)::QAB(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(B);CHECK
      • Vars
        • S(b);P_SPINS(b)::B(B)
        • S(f);P_SPINS(f)::B(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(h);CHECK,N_GUARD::S(E),XB(h)
        • R(a);::QAB(C)
        • R(a);::QAR2(C)
        • R(a);P_PINB(B)::QAR2(C)
        • S(b);::QAR2(C)
      • Refutation
        • B(h);CHECK
    • Try
      • Q(C);
      • Threat
        • DUALS(6)
      • Vars
        • B(h);CHECK,N_GUARD::S(E),XB(h)
        • S(b);::QAB(C)
      • Refutation
        • B(h);CHECK
  • Actual
    • K(D);S_FLIGHT
    • Threat
      • S(E)
    • Vars
      • R(a);CHECK,N_GUARD::QAB(C),XR(a)
      • R(g);CHECK,OGATE,XS(E)::QAB(C),XR(g)
      • B(h);CHECK,N_GUARD::S(E),XB(h)
      • B(h);N_GUARD::S(E)
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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).