MESON Chess Problem Database

Problem Display
PID: 72270 (7r/q1p2R1B/nb5Q/pr1p4/1p6/5P1N/2NBk1p1/2K2b1n w - - 0 1)

Holladay, Edgar Dinwiddie

Chess, 1953

7r/q1p2R1B/nb5Q/pr1p4/1p6/5P1N/2NBk1p1/2K2b1n

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Qe3#
      • 2.Qe6#
    • 1...Sf2
      • 2.Sg1#
    • 1...Sc5
      • 2.Sd4#
      • 2.Qe3#
    • 1...c5
      • 2.Qe3#
      • 2.Qe6#
  • Tries
    • 1.Re7+?
      • 1...Kxf3
        • 2.Qf4#
      • 1...Be3!
    • 1.Qxb6?
      • threat
        • 2.Sd4#
        • 2.Sg1#
        • 2.Qxb5#
      • 1...Rxb6
        • 2.Sd4#
      • 1...Rxh7
        • 2.Qxb5#
      • 1...cxb6
        • 2.Sd4#
      • 1...g1Q
        • 2.Sxg1#
        • 2.Qxb5#
      • 1...g1S
        • 2.Sd4#
        • 2.Sxg1#
        • 2.Qxb5#
      • 1...g1B
        • 2.Sxg1#
        • 2.Qxb5#
      • 1...g1R
        • 2.Sd4#
        • 2.Sxg1#
        • 2.Qxb5#
      • 1...Qb8
        • 2.Sd4#
        • 2.Sg1#
        • 2.Qe3#
        • 2.Qe6#
      • 1...Qb7
        • 2.Sd4#
        • 2.Sg1#
        • 2.Qe3#
        • 2.Qe6#
      • 1...Rc5
        • 2.Qe6#
      • 1...Rb8
        • 2.Sd4#
        • 2.Sg1#
      • 1...Sf2
        • 2.Sd4#
        • 2.Sg1#
      • 1...Sc5
        • 2.Sd4#
      • 1...d4
        • 2.Sxd4#
      • 1...c5
        • 2.Qe6#
      • 1...c6
        • 2.Sd4#
        • 2.Sg1#
      • 1...Qxb6!
    • 1.Qg6?
      • threat
        • 2.Qd3#
      • 1...Sf2
        • 2.Sg1#
      • 1...Sc5
        • 2.Sd4#
      • 1...Rxh7!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qxb5#
      • 1...Rc5
        • 2.Qe6#
      • 1...Sf2
        • 2.Sg1#
      • 1...Sc5
        • 2.Sd4#
      • 1...d4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);SBLOCK,S_CUTB(j)::S(E)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • K(c);S_FLIGHT,XP(D)::QAR1(F)
      • Refutation
        • B(j);P_PINB(C),P_SPINB(j)
    • Try
      • Q(F);XB(j)
      • Threat
        • DUALS(3)
      • Vars
        • R(g);XQ(F)::S(B)
        • R(m);XB(H)::QAB(F),XR(g)
        • P(l);XQ(F)::S(B)
        • R(g);P_PINS(B),S_CUTQ(k)::QAR(F)
        • S(i);::S(B)
        • P(h);::S(B),XP(h)
        • P(l);S_CUTQ(k)::QAR(F)
      • Refutation
        • Q(k);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • S(b);SBLOCK,S_CUTB(j)::S(E)
        • S(i);S_CUTB(j)::S(B)
      • Refutation
        • R(m);XB(H)
  • Actual
    • Q(F);
    • Threat
      • QAB(F),XR(g)
    • Vars
      • R(g);P_PINS(B),S_CUTB(j)::QAR(F)
      • S(b);SBLOCK,S_CUTB(j)::S(E)
      • S(i);S_CUTB(j)::S(B)
      • P(h);OGATE::QAR2(F)
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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).