MESON Chess Problem Database

Problem Display
PID: 66036 (3R2B1/6Q1/P1P3n1/rR1PN2p/1P1k4/p1N2P2/2K1P2q/2B5 w - - 0 1)

van Dooren, Rene

Die Schwalbe, 1987

3R2B1/6Q1/P1P3n1/rR1PN2p/1P1k4/p1N2P2/2K1P2q/2B5

#2

14 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3
      • 2.e3#
    • 1...Qh1
      • 2.e3#
    • 1...Qxe2+
      • 2.Sxe2#
    • 1...Qh3
      • 2.e3#
    • 1...Qh4
      • 2.e3#
    • 1...Rxb5
      • 2.Sxb5#
  • Tries
    • 1.Kb3?
      • threat
        • 2.e3#
      • 1...Qxe5
        • 2.Qa7#
      • 1...Qxe2
        • 2.Sxe2#
      • 1...Sxe5
        • 2.Qa7#
      • 1...Qg1
        • 2.Sxg6#
      • 1...Qf2
        • 2.Sxg6#
      • 1...Qf4!
    • 1.Sxg6+?
      • 1...Kc4
        • 2.d6#
      • 1...Qe5!
  • Keys
    • 1.d6!
      • threat
        • 2.Qa7#
      • 1...Qxe2+
        • 2.Sxe2#
      • 1...Qxe5
        • 2.e3#
      • 1...Rxb5
        • 2.Sxb5#
      • 1...Rxa6
        • 2.Rd5#
      • 1...Se7
        • 2.dxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_PINP(C)::P(C)
    • Q(a);CHECK,XP(C)::S(D),XQ(a)
    • R(d);XR(G)::S(D),XR(d)
  • Tries
    • Try
      • K(B);N_SPINP(C),S_FLIGHT
      • Threat
        • P(C)
      • Vars
        • Q(a);P_SPINQ(a),SBLOCK,XS(I)::QAB(L)
        • Q(a);XP(C)::S(D),XQ(a)
        • S(f);P_SPINS(f),SBLOCK,XS(I)::QAB(L)
        • Q(a);N_GUARD::QAB(L)+S(I),XS(f)
      • Refutation
        • Q(a);
    • Try
      • S(I);CHECK,XS(f)
      • Vars
        • K(c);P-FLIGHT::B(N)+P(H)
      • Refutation
        • Q(a);N_PINP(C),P_SPINQ(a)
  • Actual
    • P(H);
    • Threat
      • QAB(L)
    • Vars
      • Q(a);CHECK,XP(C)::S(D),XQ(a)
      • Q(a);N_PINP(C),P_SPINQ(a),XS(I)::P(C)
      • R(d);XR(G)::S(D),XR(d)
      • R(d);N_GUARD,XP(J)::R1(G)
      • S(f);OGATE::R(M)+P(H),XS(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).