MESON Chess Problem Database

Problem Display
PID: 6837 (B7/p4p2/n4Q2/r1kr1nRq/p1N3p1/3P4/1R1B1b2/1KN5 w - - 0 1)

Blake, Percy Francis

Recomm., BCF 016. Ty., 1934-1935

B7/p4p2/n4Q2/r1kr1nRq/p1N3p1/3P4/1R1B1b2/1KN5

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qc6#
    • 1...Re5
      • 2.Qxe5#
    • 1...Rd6
      • 2.Qxd6#
    • 1...Bd4
      • 2.Qc6#
    • 1...Sg3
      • 2.Qxf2#
    • 1...Sd4
      • 2.Qe7#
      • 2.Qd6#
    • 1...Sh4
      • 2.Qxf2#
    • 1...Sd6
      • 2.Qxf2#
    • 1...Sh6
      • 2.Qxf2#
    • 1...Se7
      • 2.Qxf2#
    • 1...Sg7
      • 2.Qxf2#
  • Tries
    • 1.Sb3+?
      • 1...Kb5
        • 2.Sa3#
        • 2.Bc6#
        • 2.Qc6#
      • 1...axb3!
    • 1.Bb4+?
      • 1...Kb5
        • 2.Sa3#
        • 2.Bc6#
        • 2.Qc6#
      • 1...Sxb4!
    • 1.Rb5+?
      • 1...Kxb5
        • 2.Qc6#
      • 1...Rxb5+!
  • Keys
    • 1.Sa3!
      • threat
        • 2.Rc2#
      • 1...Rxd3
        • 2.Sxd3#
      • 1...Re5
        • 2.Qxe5#
      • 1...Rb5
        • 2.Rxb5#
      • 1...Rd4
        • 2.Qc6#
      • 1...Rd6
        • 2.Qc3#
      • 1...Bd4
        • 2.Qc6#
      • 1...Se3
        • 2.d4#
      • 1...Sd4
        • 2.Qe7#
      • 1...Sd6
        • 2.Qxf2#
      • 1...Sb4
        • 2.Bxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • R(f);P_SPINS(g),SBLOCK::QAR1(H)
    • R(f);OGATEB::QAR2(H),XR(f)
    • R(f);N_GUARD,P_SPINS(g)::QAB1(H),XR(f)
    • B(a);SBLOCK::QAR1(H)
    • S(g);OGATE,P_SPINR(f)::QAB(H),XB(a)
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • P(b);XS(B)
    • Try
      • B(D);CHECK
      • Refutation
        • S(i);XB(D)
    • Try
      • R(C);CHECK
      • Vars
        • K(e);P-FLIGHT,XR(C)::QAB1(H)
      • Refutation
        • R(d);CHECK,XR(C)
  • Actual
    • S(F);
    • Threat
      • R(C)
    • Vars
      • R(f);P_SPINS(g),XP(E)::S(B),XR(f)
      • R(f);OGATEB::QAR2(H),XR(f)
      • R(d);N_GUARD,P_PINR(C)::R1(C),XR(d)
      • R(f);P_SPINS(g),SBLOCK::QAR1(H)
      • R(f);P_SPINS(g),SBLOCK::QAR2(H)
      • B(a);SBLOCK::QAR1(H)
      • S(g);N_GUARD,P_SPINR(f),S_CUTB(a)::P(E)
      • S(g);N_GUARD,P_SPINR(f),SBLOCK::QAB(H)
      • S(g);OGATE,P_SPINR(f),SBLOCK::QAB(H),XB(a)
      • S(i);N_GUARD::B(D),XS(i)
HTML5 logo

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).