MESON Chess Problem Database

Problem Display
PID: 260164 (7k/4N3/4pKP1/2p5/6p1/1B3b2/3prpP1/Q3n3 w - - 0 1)

Somma, Francesco

L'Italia Scacchistica, 1929

7k/4N3/4pKP1/2p5/6p1/1B3b2/3prpP1/Q3n3

#2

6 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qa8#
    • 1...Be4
      • 2.Kxe6#
    • 1...Ba8
      • 2.Qxa8#
    • 1...Sc2
      • 2.Qh1#
    • 1...Sd3
      • 2.Qh1#
  • Tries
    • 1.Kg5+?
      • 1...Re5+
        • 2.Qxe5#
      • 1...e5!
    • 1.Kf7+?
      • 1...Re5
        • 2.Qxe5#
      • 1...e5!
    • 1.Qe5?
      • threat
        • 2.Qh2#
        • 2.Qb8#
        • 2.Qh5#
      • 1...Bxg2
        • 2.Qb8#
        • 2.Qh5#
      • 1...Sxg2
        • 2.Qb8#
        • 2.Qh5#
      • 1...d1Q
        • 2.Qh2#
        • 2.Qh5#
      • 1...d1R
        • 2.Qh2#
        • 2.Qh5#
      • 1...f1S
        • 2.Qb8#
        • 2.Qh5#
      • 1...Bc6
        • 2.Qh2#
        • 2.Qh5#
      • 1...Bb7
        • 2.Qh2#
        • 2.Qh5#
      • 1...g3
        • 2.Qb8#
      • 1...Rxe5!
  • Keys
    • 1.Bc2!
      • threat
        • 2.g7#
      • 1...Sxc2
        • 2.Qh1#
      • 1...Re4
        • 2.Qa8#
      • 1...Be4
        • 2.Kxe6#
      • 1...Sd3
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • R(c);S_CUTB(e)::QAB1(A)
    • B(e);::QAB(A)+K(D),XP(h)
    • B(e);N_GUARD::QAB1(A),XB(e)
    • S(a);OGATE::QAB(A)
  • Tries
    • Try
      • K(D);CHECK,S_FLIGHT
      • Vars
        • R(c);CHECK,N_GUARD,P_SPINR(c)::QAB(A),XR(c)
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • K(D);CHECK,P-FLIGHT
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB(A),XR(c)
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(f);::QAR(A)
      • Refutation
        • R(c);XQ(A)
  • Actual
    • B(C);
    • Threat
      • P(E)
    • Vars
      • S(a);OGATE,XB(C)::QAB(A)
      • R(c);S_CUTB(e)::QAB1(A)
      • B(e);::QAB(A)+K(D),XP(h)
      • S(a);OGATE::QAB(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).