MESON Chess Problem Database

Problem Display
PID: 262166 (4R3/1p6/3p2Kp/5p1P/nq1P1kbQ/br4N1/4BP1n/4B3 w - - 0 1)

Somma, Francesco

L'Italia Scacchistica, 1927

4R3/1p6/3p2Kp/5p1P/nq1P1kbQ/br4N1/4BP1n/4B3

#2

9 + 11

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.fxe3#
    • 1...Rxg3
      • 2.Qxg3#
      • 2.fxg3#
    • 1...Sc3
      • 2.Bd2#
  • Tries
    • 1.Bd2+?
      • 1...Re3
        • 2.Bxe3#
        • 2.fxe3#
      • 1...Qxd2!
    • 1.Qxg4+?
      • 1...fxg4
        • 2.Re4#
        • 2.Rf8#
      • 1...Sxg4!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Re4#
      • 1...Bxh5+
        • 2.Sxh5#
      • 1...Qxd4
        • 2.Qxd4#
      • 1...Rxg3
        • 2.fxg3#
      • 1...Bxe2
        • 2.Qxf5#
      • 1...Bf3
        • 2.Qxf5#
      • 1...Re3
        • 2.fxe3#
      • 1...Sc3
        • 2.Bd2#
      • 1...Sc5
        • 2.Qxd6#
      • 1...d5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE::P(C),XR(c)
    • S(d);S_CUTQ(e),S_CUTR(c)::B(A)
  • Tries
    • Try
      • B(A);CHECK
      • Refutation
        • Q(e);XB(A)
    • Try
      • Q(F);CHECK,XB(g)
      • Refutation
        • S(a);XQ(F)
  • Actual
    • Q(F);N_PINB(g),P_PINP(h)
    • Threat
      • R1(I)
    • Vars
      • B(g);CHECK,XP(G)::S(D),XB(g)
      • Q(e);OGATE,XP(E)::QAR2(F),XQ(e)
      • R(c);OGATE,XS(D)::P(C),XR(c)
      • B(g);N_GUARD,XB(B)::QAR1(F),XP(h)
      • B(g);N_GUARD::QAR1(F),XP(h)
      • R(c);OGATE::P(C),XR(c)
      • S(d);S_CUTQ(e),S_CUTR(c)::B(A)
      • S(d);S_CUTQ(e)::QAB(F),XP(i)
      • P(i);N_GUARD::QAB1(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).