MESON Chess Problem Database

Problem Display
PID: 263749 (3QNb2/p6r/1P6/2kB3R/Kn6/1P2n3/2N5/2R5 w - - 0 1)

Cristoffanini, Guido

3rd HM., Tijdschrift vd NSB, 1931

3QNb2/p6r/1P6/2kB3R/Kn6/1P2n3/2N5/2R5

#2

9 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Re7
      • 2.Qd6#
    • 1...Bd6
      • 2.Qxd6#
    • 1...Bh6
      • 2.Qd6#
    • 1...Bg7
      • 2.Qd6#
  • Tries
    • 1.Sxb4+?
      • 1...Kd4
        • 2.Qf6#
      • 1...Sc4
        • 2.Rxc4#
      • 1...Sc2!
    • 1.Sd4+?
      • 1...Sec2
        • 2.Se6#
      • 1...Sc4
        • 2.Se6#
        • 2.Rxc4#
      • 1...Sbc2
        • 2.Se6#
      • 1...Kxd4!
    • 1.Qc7+?
      • 1...Sc6
        • 2.Qxc6#
        • 2.b4#
      • 1...Rxc7!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qd4#
      • 1...Sexc2
        • 2.Qf2#
      • 1...Sexd5
        • 2.Sxb4#
      • 1...Sbxc2
        • 2.b4#
      • 1...Sbxd5
        • 2.Sxe3#
      • 1...Sf5
        • 2.Sxb4#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Bg7
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • R(e);S_CUTB(f)::QAB1(H)
    • B(f);N_GUARD::QAB1(H),XB(f)
    • B(f);N_GUARD::QAB1(H)
  • Tries
    • Try
      • S(B);CHECK,XS(b)
      • Vars
        • K(c);S_CUTS(a),S_CUTS(a),S_FLIGHT::QAB(H)
        • S(a);N_GUARD,P_SPINS(a)::R1(A),XS(a)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • S(B);CHECK
      • Vars
        • S(a);P_SPINS(a)::S(B)
        • S(b);P_SPINS(b)::S(B)
      • Refutation
        • K(c);S_FLIGHT,XS(B)
    • Try
      • Q(H);CHECK
      • Refutation
        • R(e);XQ(H)
  • Actual
    • Q(H);
    • Threat
      • QAB1(H)
    • Vars
      • S(a);OGATEB,P_SPINS(a),XS(B)::QAB(H)
      • S(a);N_GUARD,P_SPINS(a),XB(E)::R(A)+S(B),XS(b)
      • S(b);OGATE,P_SPINS(b),XS(B)::P(C)
      • S(b);N_GUARD,P_SPINS(b),XB(E)::R(A)+S(B),XS(a)
      • S(a);N_GUARD::R(A)+S(B),XS(b)
      • S(b);N_GUARD::QAR1(H),XS(b)
      • B(f);N_GUARD::QAB1(H)
HTML5 logo

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).