MESON Chess Problem Database

Problem Display
PID: 121054 (5Q2/8/8/1B4pK/1q2p1R1/4P3/2R1NPNB/r4k2 w - - 0 1)

Gockel, Hubert

Canadian Chess Chat, 1980

5Q2/8/8/1B4pK/1q2p1R1/4P3/2R1NPNB/r4k2

#2

10 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Sc3#
    • 1...Qc3
      • 2.Sxc3#
    • 1...Qd6
      • 2.Sd4#
    • 1...Qe7
      • 2.Sc1#
      • 2.Sg1#
      • 2.Sc3#
      • 2.Sd4#
      • 2.Sef4#
    • 1...Qxf8
      • 2.Sc1#
      • 2.Sg1#
      • 2.Sc3#
      • 2.Sd4#
      • 2.Sef4#
    • 1...Qd4
      • 2.Sxd4#
  • Tries
    • 1.Sc1+?
      • 1...Qc4
        • 2.Bxc4#
      • 1...Qxb5!
    • 1.Sg1+?
      • 1...Qc4
        • 2.Bxc4#
      • 1...Qxb5!
    • 1.Sc3+?
      • 1...Qc4
        • 2.Bxc4#
      • 1...Qxb5!
    • 1.Sd4+?
      • 1...Qc4
        • 2.Bxc4#
      • 1...Qxb5!
    • 1.Sef4+?
      • 1...Qc4
        • 2.Bxc4#
      • 1...Qxb5!
    • 1.Se1?
      • threat
        • 2.Rg1#
      • 1...Kxe1
        • 2.Rg1#
      • 1...Qxf8!
    • 1.Sh4?
      • threat
        • 2.Rg1#
      • 1...Ke1
        • 2.Rg1#
      • 1...Qxf8!
    • 1.Rc1+?
      • 1...Qe1
        • 2.Sg1#
        • 2.Sc3#
        • 2.Sd4#
      • 1...Rxc1!
    • 1.Qxb4?
      • threat
        • 2.Sc1#
        • 2.Sg1#
        • 2.Sc3#
        • 2.Sd4#
        • 2.Sef4#
      • 1...Kxf2
        • 2.Sg1#
        • 2.Sd4#
        • 2.Qf8#
      • 1...Rc1
        • 2.Sxc1#
        • 2.Sg1#
        • 2.Sc3#
        • 2.Sd4#
        • 2.Sef4#
      • 1...Re1
        • 2.Qxe1#
      • 1...Ra3
        • 2.Sc3#
        • 2.Qe1#
      • 1...Ra5
        • 2.Qe1#
      • 1...Rd1!
    • 1.f4?
      • threat
        • 2.Sg3#
      • 1...Qd2
        • 2.fxg5#
      • 1...Kf2!
  • Keys
    • 1.f3!
      • threat
        • 2.Sg3#
      • 1...Kf2
        • 2.Sc3#
      • 1...Qd2
        • 2.fxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD::B(H)+S(B)
    • Q(c);N_GUARD::B(H)+S(B),XQ(c)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::B(H),XQ(c)
      • Refutation
        • Q(c);XB(H)
    • Try
      • S(B);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::B(H),XQ(c)
      • Refutation
        • Q(c);XB(H)
    • Try
      • S(B);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::B(H),XQ(c)
      • Refutation
        • Q(c);XB(H)
    • Try
      • S(B);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::B(H),XQ(c)
      • Refutation
        • Q(c);XB(H)
    • Try
      • S(B);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::B(H),XQ(c)
      • Refutation
        • Q(c);XB(H)
    • Try
      • S(D);
      • Threat
        • R1(G)
      • Vars
        • K(b);P-FLIGHT,XS(D)::R(G)
      • Refutation
        • Q(c);XQ(J)
    • Try
      • S(D);
      • Threat
        • R1(G)
      • Vars
        • K(b);P-FLIGHT::R(G)
      • Refutation
        • Q(c);XQ(J)
    • Try
      • R(A);CHECK
      • Refutation
        • R(a);XR(A)
    • Try
      • Q(J);XQ(c)
      • Threat
        • DUALS(5)
      • Vars
        • R(a);N_GUARD::QAR1(J),XR(a)
        • R(a);N_GUARD::QAR1(J)
      • Refutation
        • R(a);
    • Try
      • P(C);
      • Threat
        • B(H)+S(B),DCHECK
      • Vars
        • Q(c);N_GUARD::QAR(J)+P(C),XP(e)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • P(C);
    • Threat
      • B(H)+S(B),DCHECK
    • Vars
      • K(b);P-FLIGHT::R(A)+S(B)
      • Q(c);N_GUARD::QAR(J)+P(C),XP(d)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).