MESON Chess Problem Database

Problem Display
PID: 36876 (2Rr4/B4p2/n2q2n1/1B1kPQ2/1r1p1p2/3R1P2/N1NK4/b7 w - - 0 1)

Eddy, Edwin John

Recomm., BCF 010. Ty., 1932-1933

2Rr4/B4p2/n2q2n1/1B1kPQ2/1r1p1p2/3R1P2/N1NK4/b7

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Rxd8#
    • 1...Qe6
      • 2.Qe4#
    • 1...Rb1
      • 2.Bc4#
    • 1...Rb2
      • 2.Sc3#
      • 2.Bc4#
      • 2.Rxd4#
    • 1...Rb3
      • 2.Bc4#
    • 1...Rc4
      • 2.Bxc4#
    • 1...Bc3+
      • 2.Sxc3#
    • 1...Sc5
      • 2.Saxb4#
      • 2.Scxb4#
  • Tries
    • 1.Saxb4+?
      • 1...Sxb4
        • 2.Bc4#
      • 1...Qxb4+!
    • 1.Scxb4+?
      • 1...Sxb4
        • 2.Bc4#
      • 1...Qxb4+!
    • 1.Bc6+?
      • 1...Kc4
        • 2.Sa3#
      • 1...Qxc6!
    • 1.Rc5+?
      • 1...Sxc5
        • 2.Saxb4#
        • 2.Scxb4#
      • 1...Qxc5!
    • 1.e6+?
      • 1...Qe5
        • 2.Rxd8#
      • 1...Se5!
  • Keys
    • 1.Sxd4!
      • threat
        • 2.Qe4#
      • 1...Rb2+
        • 2.Sc2#
      • 1...Bc3+
        • 2.Sxc3#
      • 1...Qxe5
        • 2.Rxd8#
      • 1...Rxd4
        • 2.Bc4#
      • 1...Bxd4
        • 2.Sc3#
      • 1...Sc5
        • 2.Sxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(g);OGATEB,P_SPINQ(g),XP(G)::R(J),XR(j)
    • Q(g);SBLOCK::QAB1(H)
    • R(b);N_GUARD::B(F)
    • R(b);N_GUARD::B(F),XR(b)
    • B(a);CHECK,N_GUARD::S(A),XB(a)
  • Tries
    • Try
      • S(A);CHECK,XR(b)
      • Vars
        • S(f);XS(A)::B(F)
      • Refutation
        • Q(g);CHECK,XS(A)
    • Try
      • S(B);CHECK,XR(b)
      • Vars
        • S(f);XS(B)::B(F)
      • Refutation
        • Q(g);CHECK,XS(B)
    • Try
      • B(F);CHECK
      • Vars
        • K(e);N_SPINP(c),S_FLIGHT::S(B)
      • Refutation
        • Q(g);XB(F)
    • Try
      • R(J);CHECK
      • Refutation
        • Q(g);XR(J)
    • Try
      • P(G);CHECK
      • Vars
        • Q(g);P_SPINQ(g),S_CUTS(h)::R(J),XR(j)
      • Refutation
        • S(h);P_SPINS(h)
  • Actual
    • S(B);XP(c)
    • Threat
      • QAB1(H)
    • Vars
      • R(b);CHECK,N_GUARD,S_CUTB(a)::R(D)+S(B)
      • B(a);CHECK,N_GUARD::S(A),XB(a)
      • Q(g);OGATEB,P_SPINQ(g),XP(G)::R(J),XR(j)
      • R(b);N_GUARD,P_PINR(D),P_SPINR(b),XS(B)::B(F)
      • B(a);N_GUARD,P_SPINB(a),XS(B)::S(A)
      • S(f);N_GUARD,S_CUTQ(g)::S(A),XR(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).