MESON Chess Problem Database

Problem Display
PID: 198719 (bn6/brp5/q7/p1B2p2/1p1P4/5N1p/1R2Pk2/1R3N1K w - - 0 1)

Guidelli, Giorgio

Il Secolo, 1921

bn6/brp5/q7/p1B2p2/1p1P4/5N1p/1R2Pk2/1R3N1K

#2

8 + 11

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.d5#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Sxh3#
      • 1...Qc6+
        • 2.e4#
      • 1...Rb5+
        • 2.e4#
      • 1...Rb6+
        • 2.d5#
      • 1...Qd3
        • 2.exd3#
      • 1...Qh6
        • 2.e3#
        • 2.e4#
      • 1...h2
        • 2.Sh3#
      • 1...Qxe2!
  • Keys
    • 1.Sg1!
      • threat
        • 2.Sxh3#
      • 1...Qc6+
        • 2.e4#
      • 1...Rb5+
        • 2.e4#
      • 1...Rb6+
        • 2.d5#
      • 1...Qxe2
        • 2.Rxe2#
      • 1...Qd3
        • 2.exd3#
      • 1...Qh6
        • 2.e3#
      • 1...h2
        • 2.Sh3#

This anticipates 184466(1928)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(h);P_PINS(F),S_CUTB(g)::B(H)+P(G)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F),XP(b)
      • Vars
        • Q(f);CHECK,N_GUARD::R(D)+P(E)
        • R(h);CHECK,S_CUTQ(f)::R(D)+P(E)
        • R(h);CHECK,S_CUTB(g)::B(H)+P(G)
        • Q(f);OGATE::R(D)+P(E),XQ(f)
        • P(b);::S(F)
      • Refutation
        • Q(f);P_SPINQ(f),XP(E)
  • Actual
    • S(F);
    • Threat
      • S(F),XP(b)
    • Vars
      • Q(f);CHECK,N_GUARD::R(D)+P(E)
      • R(h);CHECK,S_CUTQ(f)::R(D)+P(E)
      • R(h);CHECK,S_CUTB(g)::B(H)+P(G)
      • Q(f);OGATE,P_SPINQ(f),XP(E)::R1(D),XQ(f)
      • Q(f);OGATE::R(D)+P(E),XQ(f)
      • Q(f);N_GUARD::R(D)+P(E)
      • P(b);::S(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).