MESON Chess Problem Database

Problem Display
PID: 71724 (4nK2/3B4/5pb1/pRN1kp2/1bp1N1Q1/6P1/1q4n1/B2R4 w - - 0 1)

Cristoffanini, Guido

Mari, Alberto

L'Alfiere di Re, 1926

4nK2/3B4/5pb1/pRN1kp2/1bp1N1Q1/6P1/1q4n1/B2R4

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Sb3#
      • 2.Sa4#
      • 2.Sa6#
      • 2.Se6#
      • 2.Sb7#
    • 1...Bd2
      • 2.Sb3#
      • 2.Se6#
    • 1...Bc3
      • 2.Sb3#
    • 1...Bxc5+
      • 2.Rxc5#
    • 1...Bh5
      • 2.Qxf5#
    • 1...Bf7
      • 2.Qxf5#
    • 1...Se1
      • 2.Qf4#
    • 1...Se3
      • 2.Qf4#
    • 1...Sf4
      • 2.Qxf4#
      • 2.gxf4#
    • 1...Sh4
      • 2.Qf4#
    • 1...fxe4
      • 2.Qe6#
    • 1...f4
      • 2.Qe6#
  • Tries
    • 1.Bxb2+?
      • 1...Bc3
        • 2.Sb3#
        • 2.Sa4#
        • 2.Sa6#
        • 2.Se6#
        • 2.Sb7#
        • 2.Bxc3#
      • 1...c3!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sxc4#
      • 1...Bxc5
        • 2.Rxc5#
      • 1...Sxd6
        • 2.Sd3#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Bd2
        • 2.Scb7#
      • 1...Bf7
        • 2.Sxf7#
        • 2.Qxf5#
      • 1...Se3
        • 2.Qf4#
      • 1...c3
        • 2.Sc4#
        • 2.Qd4#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • B(c);N_PINS(G),N_SPINQ(a)::R(F)+S(G)
    • B(c);CHECK,OGATE,P_SPINB(c),XS(G)::R(F),XB(c)
    • B(i);N_GUARD::QAR1(E),XP(g)
    • S(b);N_GUARD::QAB1(E)
    • P(g);OGATE,XS(D)::QAR1(E)
    • P(g);OGATE::QAR1(E)
  • Tries
    • Try
      • B(A);CHECK,XQ(a)
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • S(D);N_SPINS(G)
    • Threat
      • S(D),XP(d)
    • Vars
      • B(c);OGATE,P_PINS(D),P_SPINB(c),XS(G)::R(F),XB(c)
      • S(j);SBLOCK,XS(D)::R(F)+S(G),DCHECK
      • Q(a);N_GUARD::QAB1(E),XQ(a)
      • B(c);N_GUARD::R(F)+S(G)
      • S(b);N_GUARD::QAB1(E)
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).