MESON Chess Problem Database

Problem Display
PID: 63508 (8/2nK1P2/3N2Qp/b2k1pRr/2N5/BpnqP2p/8/5B2 w - - 0 1)

Davis, Edward

Chess, 1945

8/2nK1P2/3N2Qp/b2k1pRr/2N5/BpnqP2p/8/5B2

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe2
      • 2.Qxf5#
    • 1...Qxc4
      • 2.Qxf5#
    • 1...Qd1
      • 2.Qxf5#
    • 1...Qd2
      • 2.Qxf5#
    • 1...Se4
      • 2.Qxf5#
    • 1...Sb5
      • 2.Qe6#
    • 1...Sa6
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sa8
      • 2.Qe6#
    • 1...Se8
      • 2.Qe6#
  • Tries
    • 1.Sb6+?
      • 1...Ke5
        • 2.Qg7#
      • 1...Bxb6!
    • 1.Bg2+?
      • 1...Qe4
        • 2.Qxf5#
      • 1...Se4
        • 2.Qxf5#
      • 1...hxg2!
    • 1.Qf6?
      • threat
        • 2.Qe5#
      • 1...Qxc4
        • 2.Bxc4#
        • 2.Qxf5#
      • 1...Qxe3
        • 2.Sxe3#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qe4!
    • 1.Qg7?
      • threat
        • 2.Qe5#
      • 1...Qxc4
        • 2.Bxc4#
      • 1...Qxe3
        • 2.Sxe3#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qe4!
  • Keys
    • 1.Sxf5!
      • threat
        • 2.Qc6#
      • 1...Kxc4+
        • 2.Sd6#
      • 1...Ke4+
        • 2.Sd4#
      • 1...Qxf5+
        • 2.Qxf5#
      • 1...Qxc4
        • 2.Se7#
      • 1...Se6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(c);N_GUARD::QAR2(G),XP(g)
    • Q(c);N_GUARD,XS(D)::QAR2(G),XP(g)
    • S(b);S_CUTQ(c)::QAR2(G),XP(g)
    • S(j);N_GUARD::QAB1(G)
    • S(j);N_GUARD::QAB1(G),XS(j)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(f);P-FLIGHT,P_PINS(F)::QAB(G)
      • Refutation
        • B(e);XS(D)
    • Try
      • B(A);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::QAR2(G),XP(g)
        • S(b);P_SPINS(b)::QAR2(G),XP(g)
      • Refutation
        • P(d);XB(A)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • Q(c);XP(C)::S(D),XQ(c)
        • Q(c);N_GUARD::QAR1(G),XQ(c)
      • Refutation
        • Q(c);
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • Q(c);OGATE,XS(D)::B(A),XQ(c)
        • Q(c);XP(C)::S(D),XQ(c)
        • Q(c);N_GUARD::QAR1(G),XQ(c)
      • Refutation
        • Q(c);
  • Actual
    • S(F);XP(g)
    • Threat
      • QAB1(G)
    • Vars
      • K(f);CHECK,P_SPINQ(c),S_FLIGHT,XS(D)::S(F)
      • K(f);CHECK,S_FLIGHT::QAB(G)+S(F)
      • Q(c);CHECK,OGATE,P_SPINQ(c),XS(F)::QAR2(G),XQ(c)
      • Q(c);XS(D)::R(E)+S(F),DCHECK
      • S(j);N_GUARD::QAB1(G),XS(j)
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).