MESON Chess Problem Database

Problem Display
PID: 173974 (3R3n/4P1p1/3B2n1/p4KQ1/1N1kP2p/1Pr1rp2/3P4/8 w - - 0 1)

Bottacchi, Antonio

L'Italia Scacchistica, 1927

3R3n/4P1p1/3B2n1/p4KQ1/1N1kP2p/1Pr1rp2/3P4/8

#2

9 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qxe3#
    • 1...Rc2
      • 2.Qxe3#
    • 1...Rcd3
      • 2.Sc2#
      • 2.Sc6#
    • 1...Rc4
      • 2.Qxe3#
    • 1...Rc5+
      • 2.Be5#
    • 1...Rc6
      • 2.Qxe3#
    • 1...Rc7
      • 2.Qxe3#
    • 1...Rc8
      • 2.Qxe3#
    • 1...Sf4
      • 2.Qxg7#
    • 1...Sxe7+
      • 2.Bxe7#
    • 1...Sf8
      • 2.Qxg7#
    • 1...axb4
      • 2.Bxb4#
  • Tries
    • 1.Sc2+?
      • 1...Rxc2
        • 2.Ba3#
        • 2.Bb4#
        • 2.Qxe3#
      • 1...Kd3!
    • 1.Sc6+?
      • 1...Rxc6
        • 2.Qxe3#
      • 1...Kd3!
    • 1.Qf6+?
      • 1...Se5
        • 2.Qxe5#
      • 1...gxf6!
  • Keys
    • 1.Kg4!
      • threat
        • 2.Qd5#
      • 1...Rxe4+
        • 2.Bf4#
      • 1...Se5+
        • 2.Qxe5#
      • 1...Kxe4
        • 2.Qd5#
      • 1...Sxe7
        • 2.Qe5#
      • 1...Rc5
        • 2.Qxe3#
      • 1...Sf4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(a);N_GUARD::QAB1(F),XR(b)
    • R(a);CHECK,SBLOCK::R(I)+B(G),DCHECK
    • S(g);OGATE::QAB(F),XP(h)
    • S(g);CHECK,OGATE,XP(H)::R(I)+B(G),XS(g)
    • P(f);OGATE,XS(C)::R(I)+B(G),XP(f)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • R(a);XS(C)::QAB1(F),XR(b)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAB1(F),XS(g)
      • Refutation
        • P(h);XQ(F)
  • Actual
    • K(E);S_FLIGHT
    • Threat
      • QAR1(F)
    • Vars
      • R(b);CHECK,SBLOCK,XP(D)::R(I)+B(G)
      • S(g);CHECK,N_GUARD::QAB1(F),XS(g)
      • K(d);P-FLIGHT,XP(D)::QAB1(F)
      • S(g);N_GUARD,XP(H)::QAB1(F)
      • R(a);N_GUARD::QAB1(F),XR(b)
      • S(g);N_GUARD::QAB1(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).