MESON Chess Problem Database

Problem Display
PID: 202340 (3R1b2/1KNpq3/1PR2p2/NQ6/3k2n1/1P6/2BPp3/1r5b w - - 0 1)

Mari, Alberto

L'Alfiere di Re, 1923

3R1b2/1KNpq3/1PR2p2/NQ6/3k2n1/1P6/2BPp3/1r5b

#2

10 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Se6#
    • 1...Qb4
      • 2.Se6#
    • 1...Qe5
      • 2.Qd3#
      • 2.Qc4#
    • 1...Qe6
      • 2.Sxe6#
    • 1...Qg7
      • 2.Se6#
    • 1...Qh7
      • 2.Se6#
    • 1...Rxb3
      • 2.Sxb3#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Bxc6+
      • 2.Sxc6#
    • 1...d6
      • 2.Qc5#
  • Tries
    • 1.Rxd7+?
      • 1...Qd6
        • 2.Se6#
        • 2.Qc5#
      • 1...Bd5
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Qxd7!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Sb5#
      • 1...Bxc6+
        • 2.Sxc6#
      • 1...Rxb3
        • 2.Sxb3#
      • 1...Qb4
        • 2.Se6#
      • 1...Qc5
        • 2.Se6#
      • 1...Qe5
        • 2.Qd3#
      • 1...Se5
        • 2.Qf2#
      • 1...d5
        • 2.Rc4#
      • 1...d6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(h);N_GUARD::S(I)
    • Q(h);N_GUARD::S(I),XQ(h)
    • R(a);XP(C)::S(D),XR(a)
    • B(b);N_GUARD,N_SPINP(g)::QAR1(E),XB(b)
    • B(b);CHECK,XR(G)::S(D),XB(b)
    • P(g);P_PINS(I),S_CUTQ(h)::QAB1(E)
  • Tries
    • Try
      • R(J);CHECK,XP(g)
      • Refutation
        • Q(h);P_PINS(I),XR(J)
  • Actual
    • Q(E);
    • Threat
      • S(I)
    • Vars
      • B(b);CHECK,XR(G)::S(D),XB(b)
      • R(a);P_PINP(F),XP(C)::S(D),XR(a)
      • Q(h);N_GUARD,P_PINP(F)::S(I)
      • Q(h);N_GUARD::S(I)
      • Q(h);SBLOCK::QAR1(E)
      • S(e);N_GUARD,SBLOCK,S_CUTQ(h)::QAB(E)
      • P(g);N_PINR(G),P_PINS(I)::R1(G)
      • P(g);P_PINS(I),S_CUTQ(h)::QAB1(E)
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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).