MESON Chess Problem Database

Problem Display
PID: 267263 (2r4q/b1B1P3/3N1Q2/1p3Np1/1Rnn1kpp/2K3R1/2PPp1P1/4r3 w - - 0 1)

Bottacchi, Antonio

7th Prize, La Settimana Enigmistica 07. TT, 1935

2r4q/b1B1P3/3N1Q2/1p3Np1/1Rnn1kpp/2K3R1/2PPp1P1/4r3

#2

11 + 12

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.dxe3#
    • 1...Sb6
      • 2.Rxd4#
  • Tries
    • 1.Se3+?
      • 1...Kxg3
        • 2.Se4#
      • 1...Sf5
        • 2.Rxg4#
      • 1...Qxf6!
    • 1.Qxg5+?
      • 1...Ke5
        • 2.Sxd4#
      • 1...Kxg5!
  • Keys
    • 1.Re3!
      • threat
        • 2.Re4#
      • 1...Sxd2
        • 2.Sxc8#
      • 1...Sxe3
        • 2.dxe3#
      • 1...Sxd6
        • 2.Sg7#
      • 1...Sxf5
        • 2.Sxc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(c);OGATE,P_PINB(J),P_SPINS(d)::P(B),XS(c)
    • S(c);OGATE,P_PINB(J),P_SPINS(d)::R(F),XS(d)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(e);N_GUARD,S_FLIGHT,XR(E)::B(J)+S(H),DCHECK
        • S(d);P_PINQ(I),P_SPINS(c)::R1(E),XP(f)
      • Refutation
        • Q(l);XQ(I)
    • Try
      • Q(I);CHECK,XP(i)
      • Vars
        • K(e);N_GUARD,S_FLIGHT::QAR(I)+S(G),XS(d)
      • Refutation
        • K(e);P_SPINP(f),S_FLIGHT,XQ(I)
  • Actual
    • R(E);
    • Threat
      • R1(E)
    • Vars
      • S(c);N_GUARD,P_PINB(J),P_SPINS(d),XP(B)::B(J)+S(H),XR(k)
      • S(c);OGATE,P_PINB(J),P_SPINS(d),XR(E)::P(B),XS(c)
      • S(c);P_PINB(J),P_SPINS(d),XS(H)::QAR(I)+S(G)
      • S(d);P_PINQ(I),P_SPINS(c),XS(G)::B(J)+S(H),XR(k)
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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).