MESON Chess Problem Database

Problem Display
PID: 261681 (1Q6/2pr4/5p2/3PPK1p/N1k5/3Rp1R1/2p5/n3N1b1 w - - 0 1)

Somma, Francesco

Xadrez Brasileiro, 1933

1Q6/2pr4/5p2/3PPK1p/N1k5/3Rp1R1/2p5/n3N1b1

#2

8 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Qxb3#
    • 1...h4
      • 2.Rg4#
    • 1...c5
      • 2.Sb2#
  • Tries
    • 1.Ke4?
      • threat
        • 2.Rc3#
        • 2.Rd4#
      • 1...Rxd5
        • 2.Rc3#
      • 1...fxe5
        • 2.Rc3#
      • 1...c1Q
        • 2.Rd4#
      • 1...c1R
        • 2.Rd4#
      • 1...Sb3
        • 2.Rc3#
        • 2.Qxb3#
      • 1...e2
        • 2.Rc3#
      • 1...c5
        • 2.Sb2#
        • 2.Rc3#
      • 1...f5+!
    • 1.Qb6?
      • threat
        • 2.Sb2#
        • 2.Rd4#
        • 2.Qc5#
      • 1...Rxd5
        • 2.Sb2#
        • 2.Rc3#
      • 1...fxe5
        • 2.Sb2#
        • 2.Qc5#
      • 1...c1Q
        • 2.Rd4#
        • 2.Qc5#
      • 1...c1B
        • 2.Rd4#
        • 2.Qc5#
      • 1...Sb3
        • 2.Sb2#
        • 2.Qxb3#
      • 1...e2
        • 2.Sb2#
      • 1...c5
        • 2.Sb2#
        • 2.Qxc5#
      • 1...cxb6!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Rd4#
      • 1...Kxd3
        • 2.Qb5#
      • 1...Rxd5
        • 2.Rc3#
      • 1...fxe5
        • 2.Sxe5#
      • 1...Sb3
        • 2.Qxb3#
      • 1...e2
        • 2.Sd2#
      • 1...c5
        • 2.Sb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAB1(H),XS(a)
    • P(f);N_GUARD::R(C)
    • P(h);SBLOCK::S(D)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(i);XP(E)::R1(B)
        • P(g);XP(F)::R1(B)
        • P(c);::R1(B)
        • P(d);::R1(B)
      • Refutation
        • P(g);CHECK
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Vars
        • P(d);::S(D)
      • Refutation
        • P(h);XQ(H)
  • Actual
    • S(A);
    • Threat
      • R1(B)
    • Vars
      • K(e);N_GUARD,S_FLIGHT,XR(B)::QAB(H)
      • R(i);P_PINP(F),SBLOCK,XP(E)::R1(B)
      • P(g);XP(F)::S(A),XP(g)
      • S(a);N_GUARD::QAB1(H),XS(a)
      • P(d);N_GUARD::S(A)
      • P(h);SBLOCK::S(D)
HTML5 logo

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).