MESON Chess Problem Database

Problem Display
PID: 204400 (2b3B1/K1p2NpP/1Qr1nkN1/7P/4p1P1/8/1b3q2/2B2R2 w - - 0 1)

Simkhovich, Froim Markovich

L'Alfiere di Re, 1925

2b3B1/K1p2NpP/1Qr1nkN1/7P/4p1P1/8/1b3q2/2B2R2

#2

10 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Rxf5#
    • 1...Rxc1
      • 2.Rxf2#
    • 1...Rc2
      • 2.Bg5#
    • 1...Rc3
      • 2.Bg5#
    • 1...Rc4
      • 2.Bg5#
      • 2.Rxf2#
  • Tries
    • 1.Bxb2+?
      • 1...Rc3
        • 2.Bxc3#
        • 2.Rxf2#
      • 1...Sd4!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Sxe4#
      • 1...Sxg5
        • 2.Bxb2#
      • 1...e3
        • 2.Se4#
      • 1...Rc4
        • 2.Rxf2#
      • 1...Sc5
        • 2.Qxb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_PINQ(E),OGATE::R1(B),XQ(b)
    • R(d);P_SPINS(e),XB(A)::R(B),XQ(b)
    • R(d);P_SPINS(e)::B(A)
  • Tries
    • Try
      • B(A);CHECK,XB(a)
      • Refutation
        • S(e);N_PINQ(E),P_SPINR(d),P_SPINS(e)
  • Actual
    • S(H);
    • Threat
      • S(H),XP(c)
    • Vars
      • S(e);N_GUARD,P_SPINR(d),SBLOCK,XS(H)::B(A),XB(a)
      • P(c);N_PINQ(E)::S(H)
      • R(d);P_SPINS(e)::R(B),XQ(b)
      • S(e);N_PINQ(E),P_SPINR(d)::QAB(E),XB(a)
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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).