MESON Chess Problem Database

Problem Display
PID: 11012 (2K2n2/5N1b/4nR1r/P2k1p2/2R3p1/8/1b1PQ3/8 w - - 0 1)

Boorer, PA

Chess, 1936

2K2n2/5N1b/4nR1r/P2k1p2/2R3p1/8/1b1PQ3/8

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sg6
      • 2.Qxe6#
    • 1...Sd7
      • 2.Qxe6#
  • Tries
    • 1.Rc2?
      • threat
        • 2.Qc4#
      • 1...Kd4
        • 2.Qc4#
      • 1...Bd4
        • 2.Qg2#
      • 1...Sd4
        • 2.Qe5#
      • 1...Bc3!
    • 1.Rc3?
      • threat
        • 2.Qc4#
        • 2.Qe5#
      • 1...Kd4
        • 2.Qd3#
        • 2.Qc4#
        • 2.Qe5#
      • 1...Sd4
        • 2.Qe5#
      • 1...Sg6
        • 2.Qc4#
      • 1...Sd7
        • 2.Qc4#
      • 1...Bxc3!
    • 1.Ra4?
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Qc4#
      • 1...Kc6
        • 2.Qc4#
      • 1...Sd4
        • 2.Qe5#
      • 1...Bd4!
    • 1.Rb4?
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Qc4#
        • 2.Qb5#
      • 1...Kc6
        • 2.Qc4#
        • 2.Qb5#
      • 1...Sd4
        • 2.Qe5#
      • 1...Bd4!
    • 1.Rxf5+?
      • 1...Be5
        • 2.Rxe5#
        • 2.Qe4#
      • 1...Bxf5!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Qc4#
      • 1...Kd4
        • 2.Qc4#
      • 1...Kxc6
        • 2.Qc4#
      • 1...Bd4
        • 2.Qg2#
      • 1...Sd4
        • 2.Qe5#
      • 1...Sc5
        • 2.Rcd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • S(h);N_GUARD::QAB1(B),XS(e)
  • Tries
    • Try
      • R(C);
      • Threat
        • QAB1(B)
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
        • B(a);SBLOCK::QAB(B)
        • S(e);S_CUTB(a)::QAR1(B)
      • Refutation
        • B(a);
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);::QAR1(B)
        • S(h);::QAB1(B)
      • Refutation
        • B(a);XR(C)
    • Try
      • R(C);
      • Threat
        • QAB1(B)
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
        • K(c);P_SPINS(e),S_FLIGHT::QAR2(B)
        • S(e);S_CUTB(a)::QAR1(B)
      • Refutation
        • B(a);
    • Try
      • R(C);
      • Threat
        • QAB1(B)
      • Vars
        • S(e);S_CUTB(a)::QAR1(B)
      • Refutation
        • B(a);
    • Try
      • R(E);CHECK,XP(d)
      • Refutation
        • B(g);XR(E)
  • Actual
    • R(C);
    • Threat
      • QAB1(B)
    • Vars
      • K(c);P-FLIGHT::QAR1(B)
      • K(c);P_SPINS(e),S_FLIGHT,XR(C)::QAR2(B)
      • B(a);SBLOCK::QAB(B)
      • S(e);S_CUTB(a)::QAR1(B)
      • S(e);SBLOCK::R1(C)
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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).