MESON Chess Problem Database

Problem Display
PID: 263216 (1Q3N1K/3B2RP/5k1p/2n5/6nP/6r1/2p1r2p/5qb1 w - - 0 1)

Somma, Francesco

L'Echiquier, 1928

1Q3N1K/3B2RP/5k1p/2n5/6nP/6r1/2p1r2p/5qb1

#2

7 + 10

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Qf4#
    • 1...Qh3
      • 2.Qf4#
    • 1...Qa1
      • 2.Qf4#
    • 1...Qb1
      • 2.Qf4#
    • 1...Qd1
      • 2.Qf4#
    • 1...Qe1
      • 2.Qf4#
    • 1...Qf4
      • 2.Qxf4#
    • 1...Bf2
      • 2.Qf4#
    • 1...Sf2
      • 2.Qf4#
    • 1...Se3
      • 2.Qb2#
    • 1...Se5
      • 2.Qd8#
  • Tries
    • 1.Rg6+?
      • 1...Ke7
        • 2.Qe8#
      • 1...Kf7!
    • 1.Qd8+?
      • 1...Re7
        • 2.Qxe7#
      • 1...Ke5!
  • Keys
    • 1.Kg8!
      • threat
        • 2.Rf7#
      • 1...Re7
        • 2.Rg6#
      • 1...Sf2
        • 2.Qf4#
      • 1...Se3
        • 2.Qb2#
      • 1...Se5
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::QAR2(E)
    • Q(a);N_GUARD::QAR2(E),XQ(a)
    • B(b);S_CUTQ(a)::QAR2(E)
    • S(g);S_CUTQ(a)::QAR2(E)
    • S(g);N_GUARD,S_CUTB(b),S_CUTR(d),S_CUTR(f)::QAB(E)
    • S(g);SBLOCK,S_CUTR(d)::QAB(E)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(i);S_FLIGHT::QAR1(E)
      • Refutation
        • K(i);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • R(d);N_GUARD,P_SPINR(d)::QAB1(E),XR(d)
      • Refutation
        • K(i);S_FLIGHT
  • Actual
    • K(G);P-FLIGHT
    • Threat
      • R1(C)
    • Vars
      • R(d);SBLOCK::R1(C)
      • S(g);P_PINR(C),S_CUTQ(a)::QAR2(E)
      • S(g);N_GUARD,P_PINR(C),S_CUTB(b),S_CUTR(d),S_CUTR(f)::QAB(E)
      • S(g);P_PINR(C),SBLOCK,S_CUTR(d)::QAB(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).