MESON Chess Problem Database

Problem Display
PID: 200655 (1b1R3B/4r1N1/n1pp4/Q1Rpp2q/1p1k1pNp/3P1P2/4PK2/n7 w - - 0 1)

Lamba, Stelian

Stella Polaris, 1967

1b1R3B/4r1N1/n1pp4/Q1Rpp2q/1p1k1pNp/3P1P2/4PK2/n7

#2

10 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qe8
      • 2.Sf5#
    • 1...Qf5
      • 2.Sxf5#
    • 1...Qh6
      • 2.Sf5#
    • 1...Qxh8
      • 2.Sf5#
    • 1...Re6
      • 2.Sxe6#
    • 1...Ra7
      • 2.Se6#
    • 1...Rb7
      • 2.Se6#
    • 1...Rc7
      • 2.Se6#
    • 1...Rd7
      • 2.Se6#
    • 1...Rf7
      • 2.Se6#
    • 1...Sxc5
      • 2.Qxb4#
      • 2.Qxa1#
    • 1...Sc7
      • 2.Qxb4#
    • 1...b3
      • 2.Qc3#
    • 1...e4
      • 2.Sf5#
      • 2.Se6#
    • 1...dxc5
      • 2.Qxa1#
  • Tries
    • 1.Rxd6?
      • threat
        • 2.Rc4#
      • 1...Sxc5
        • 2.Qxb4#
        • 2.Qxa1#
      • 1...Bxd6!
    • 1.Qb6?
      • threat
        • 2.Rc4#
      • 1...Sxc5
        • 2.Qxb4#
      • 1...dxc5!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Sxc6#
      • 1...Qxf3+
        • 2.Sxf3#
      • 1...Kxe5
        • 2.Qxa1#
      • 1...Qxe5
        • 2.Sf5#
      • 1...Rxe5
        • 2.Se6#
      • 1...Sxc5
        • 2.Qxa1#
      • 1...dxc5
        • 2.Qxa1#
      • 1...dxe5
        • 2.Rc4#
      • 1...Qe8
        • 2.Sf5#
      • 1...Rc7
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 10
  • Sets
    • Q(h);N_GUARD::S(H)
    • Q(h);N_GUARD::S(H),XQ(h)
    • Q(h);N_GUARD,XB(J)::S(H)
    • R(l);N_GUARD::S(H),XR(l)
    • R(l);N_GUARD::S(H)
    • S(i);N_GUARD::QAR2(F),XP(b)
    • P(b);OGATE::QAB1(F)
    • P(k);P_SPINP(f),SBLOCK,XR(G)::QAB(F),XS(a)
  • Tries
    • Try
      • R(I);P_PINP(f),XP(k)
      • Threat
        • R1(G)
      • Refutation
        • B(m);N_SPINP(f),XR(I)
    • Try
      • Q(F);
      • Threat
        • QAB(F)+R(G),DCHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i),XR(G)::QAR2(F),XP(b)
      • Refutation
        • P(k);P_SPINP(k),XR(G)
  • Actual
    • S(E);XP(g)
    • Threat
      • S(E),XP(j)
    • Vars
      • Q(h);CHECK,XP(D)::S(E),XQ(h)
      • K(c);P_SPINP(f),S_FLIGHT,XS(E)::QAB(F),XS(a)
      • Q(h);N_GUARD,XS(E)::S(H)
      • R(l);N_GUARD,XS(E)::S(H)
      • S(i);SBLOCK,XR(G)::QAB(F),XS(a)
      • P(k);P_SPINP(f),SBLOCK,XR(G)::QAB(F),XS(a)
      • P(k);P_SPINP(f),SBLOCK,XS(E)::R1(G)
      • Q(h);N_GUARD::S(H)
      • R(l);N_GUARD::S(H)
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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).