MESON Chess Problem Database

Problem Display
PID: 266817 (1B2rR2/2qn4/1pQ2b2/6p1/1RNN1kP1/2KP1p2/4PP1n/8 w - - 0 1)

Castellari, Umberto

La Settimana Enigmistica, 1935

1B2rR2/2qn4/1pQ2b2/6p1/1RNN1kP1/2KP1p2/4PP1n/8

#2

11 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Qe4#
    • 1...Re4
      • 2.Qxe4#
    • 1...Rxb8
      • 2.Qe4#
    • 1...Rc8
      • 2.Qe4#
    • 1...Rd8
      • 2.Qe4#
    • 1...Rxf8
      • 2.Qe4#
    • 1...Sf1
      • 2.Qxf3#
    • 1...Sxg4
      • 2.Qxf3#
    • 1...Se5
      • 2.Qe4#
  • Tries
    • 1.Bxc7+?
      • 1...Re5
        • 2.Qe4#
      • 1...Se5
        • 2.Qe4#
      • 1...Kxg4!
    • 1.Qe6?
      • threat
        • 2.Qf5#
        • 2.e3#
      • 1...Sxg4
        • 2.Qf5#
      • 1...fxe2
        • 2.Qf5#
      • 1...Sf1
        • 2.Qf5#
      • 1...Rxe6!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sdxf3#
      • 1...Qxc6+
        • 2.Sdxc6#
      • 1...Kxe5
        • 2.Bxc7#
      • 1...Qxe5
        • 2.Qe4#
      • 1...Rxe5
        • 2.Se6#
      • 1...Sxg4
        • 2.Sg6#
      • 1...Sxe5
        • 2.Se6#
      • 1...fxe2
        • 2.Sdf3#
      • 1...Qd6
        • 2.Qe4#
      • 1...Sc5
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • Q(g);S_CUTR(i)::QAR1(I)
    • R(i);N_GUARD::QAR1(I),XR(i)
    • R(i);N_GUARD,N_SPINQ(g),XB(J)::QAR1(I)
    • R(i);N_GUARD::QAR1(I)
    • R(i);N_GUARD,N_SPINB(f),XR(K)::QAR1(I)
    • S(a);N_GUARD::QAR1(I),XP(b)
    • S(a);N_GUARD,XP(H)::QAR1(I),XP(b)
    • S(h);N_PINS(G),N_SPINQ(g),S_CUTR(i)::QAR1(I)
  • Tries
    • Try
      • B(J);CHECK,XQ(g)
      • Vars
        • R(i);N_PINS(G),P_SPINR(i)::QAR1(I)
        • S(h);N_PINS(G),P_SPINS(h)::QAR1(I)
      • Refutation
        • K(c);N_SPINB(f),P-FLIGHT,XP(H)
    • Try
      • Q(I);N_SPINS(G),P_SPINS(F)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);XP(H)::QAR1(I)
        • P(b);XP(A)::QAR1(I)
        • S(a);::QAR1(I)
      • Refutation
        • R(i);XQ(I)
  • Actual
    • S(F);N_PINQ(g),N_SPINS(G),P_SPINQ(I)
    • Threat
      • R(E)+S(G),XP(b)
    • Vars
      • Q(g);CHECK,XQ(I)::R(E)+S(G),XQ(g)
      • K(c);N_SPINB(f),OGATEB,P_SPINQ(g),S_FLIGHT,XS(F)::B(J),XQ(g)
      • Q(g);N_PINQ(I),P_PINS(G),P_SPINQ(g),XS(F)::QAR1(I)
      • R(i);SBLOCK,XS(F)::R(E)+S(G),DCHECK
      • S(a);SBLOCK,XP(H)::S(F)
      • S(h);SBLOCK,XS(F)::R(E)+S(G),DCHECK
      • P(b);XP(A)::R(E)+S(G)
      • Q(g);N_PINQ(I)::QAR1(I)
      • S(h);N_PINQ(I)::QAR2(I),XB(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).