MESON Chess Problem Database

Problem Display
PID: 145388 (1B6/1Pr1bB2/2Nkpp2/8/1RR5/KP1N1p2/P1PQp3/3q4 w - - 0 1)

Savournin, Jacques

The Problemist Supplement, 2012

1B6/1Pr1bB2/2Nkpp2/8/1RR5/KP1N1p2/P1PQp3/3q4

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Sf4#
    • 1...Kd7
      • 2.Sde5#
    • 1...Qa1
      • 2.Sb2#
    • 1...Qb1
      • 2.Sc1#
      • 2.Se1#
      • 2.Sb2#
      • 2.Sf2#
      • 2.Sf4#
      • 2.Sde5#
    • 1...Qc1+
      • 2.Sxc1#
    • 1...Qe1
      • 2.Sxe1#
    • 1...Qf1
      • 2.Sc1#
      • 2.Se1#
      • 2.Sb2#
      • 2.Sf2#
      • 2.Sf4#
      • 2.Sde5#
    • 1...Qg1
      • 2.Sf2#
    • 1...Qh1
      • 2.Sc1#
      • 2.Se1#
      • 2.Sb2#
      • 2.Sf2#
      • 2.Sf4#
      • 2.Sde5#
  • Tries
    • 1.Be8?
      • threat
        • 2.Rd4#
      • 1...Qc1+
        • 2.Sxc1#
      • 1...Kd5
        • 2.Sf4#
        • 2.Rd4#
      • 1...Qa1
        • 2.Sb2#
      • 1...Qg1
        • 2.Sf2#
      • 1...e5!
    • 1.Bxc7+?
      • 1...Kd5
        • 2.Sf4#
        • 2.Sxe7#
      • 1...Kd7
        • 2.Sb8#
      • 1...Kxc7!
    • 1.Rc3?
      • threat
        • 2.Rd4#
      • 1...Qc1+
        • 2.Sxc1#
      • 1...Kd5
        • 2.Sf4#
      • 1...Kd7
        • 2.Sde5#
      • 1...Qg1
        • 2.Sf2#
      • 1...e5!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kd7
        • 2.Qxc7#
      • 1...e5!
  • Keys
    • 1.Rb6!
      • threat
        • 2.Rd4#
      • 1...Kd5+
        • 2.Sdb4#
      • 1...Kd7+
        • 2.Sc5#
      • 1...Qc1+
        • 2.Sxc1#
      • 1...Qa1
        • 2.Sb2#
      • 1...Qg1
        • 2.Sf2#
      • 1...e5
        • 2.Scxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(d);N_SPINR(g),P-FLIGHT,P_PINR(G),P_SPINP(e)::QAR(C)+S(F),DCHECK
    • K(d);N_SPINR(g),P-FLIGHT,P_PINR(G)::QAR(C)+S(F),DCHECK
    • Q(a);N_GUARD,P_PINP(A)::QAR(C)+S(F)
    • Q(a);CHECK,N_GUARD::QAR(C)+S(F),XQ(a)
    • Q(a);N_GUARD::QAR(C)+S(F),XQ(a)
    • Q(a);N_GUARD::QAR(C)+S(F)
  • Tries
    • Try
      • B(K);
      • Threat
        • R(H)
      • Vars
        • Q(a);CHECK,N_GUARD::QAR(C)+S(F),XQ(a)
        • Q(a);N_GUARD,P_PINP(A)::QAR(C)+S(F)
        • Q(a);N_GUARD::QAR(C)+S(F)
      • Refutation
        • P(e);
    • Try
      • B(L);CHECK,XR(g)
      • Vars
        • K(d);P-FLIGHT,P_PINR(G)::S(I)
      • Refutation
        • K(d);P_PINR(G),S_FLIGHT,XB(L)
    • Try
      • R(H);
      • Threat
        • R(G)
      • Vars
        • Q(a);CHECK,N_GUARD::QAR(C)+S(F),XQ(a)
        • K(d);N_SPINR(g),P-FLIGHT,P_PINR(G),P_SPINP(e)::QAR(C)+S(F),DCHECK
        • K(d);N_SPINR(g),P-FLIGHT,P_PINR(G)::QAR(C)+S(F),DCHECK
        • Q(a);N_GUARD::QAR(C)+S(F)
      • Refutation
        • P(e);
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);N_SPINR(g),P-FLIGHT,P_PINR(G),P_SPINP(e)::QAR1(C)
        • K(d);N_SPINR(g),OGATE,P-FLIGHT,P_PINR(G)::QAR1(C),XR(g)
      • Refutation
        • P(e);P_SPINP(e)
  • Actual
    • R(G);
    • Threat
      • R(H)
    • Vars
      • K(d);CHECK,N_SPINR(g),P-FLIGHT,P_SPINP(e)::QAR(C)+S(F),DCHECK
      • K(d);CHECK,N_SPINR(g),P-FLIGHT::QAR(C)+S(F),DCHECK
      • Q(a);CHECK,N_GUARD::QAR(C)+S(F),XQ(a)
      • Q(a);N_GUARD,P_PINP(A)::QAR(C)+S(F)
      • Q(a);N_GUARD::QAR(C)+S(F)
      • P(e);::R(G)+S(I),XP(e)
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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).