MESON Chess Problem Database

Problem Display
PID: 204401 (2q1Q1b1/1P2p2B/N2P2rr/3p1RPP/3k1K1R/3pN1P1/2pP1bp1/4n1B1 w - - 0 1)

Somma, Francesco

L'Alfiere di Re, 1925

2q1Q1b1/1P2p2B/N2P2rr/3p1RPP/3k1K1R/3pN1P1/2pP1bp1/4n1B1

#2

14 + 12

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5+
      • 2.Kxf5#
    • 1...Qe6
      • 2.Qa4#
    • 1...Qa8
      • 2.Qa4#
    • 1...Qb8
      • 2.Qa4#
    • 1...Qd8
      • 2.Qa4#
    • 1...Rxg5
      • 2.Kxg5#
    • 1...Re6
      • 2.Rxd5#
    • 1...Bxg3+
      • 2.Kxg3#
    • 1...Bxh7
      • 2.Rxd5#
    • 1...Sf3
      • 2.Kxf3#
    • 1...e5+
      • 2.Qxe5#
  • Keys
    • 1.Kg4!
      • threat
        • 2.Kh3#
      • 1...Qxf5+
        • 2.Kxf5#
      • 1...Rxg5+
        • 2.Kxg5#
      • 1...Ke4
        • 2.Kh3#
      • 1...Rxh5
        • 2.Kxh5#
      • 1...Bxg3
        • 2.Kxg3#
      • 1...Qe6
        • 2.Qa4#
      • 1...Re6
        • 2.Rxd5#
      • 1...Sf3
        • 2.Kxf3#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(k);CHECK,XR(G)::R(F)+K(E),XQ(k)
    • Q(k);N_GUARD::QAR(N)
    • Q(k);N_GUARD,P_PINP(K)::QAR(N)
    • R(h);XP(H)::R(F)+K(E),XR(h)
    • R(h);S_CUTB(l)::R1(G),XP(g)
    • B(c);CHECK,XP(D)::R(F)+K(E),XB(c)
    • B(l);N_GUARD,XB(M)::R1(G),XP(g)
    • S(a);::R(F)+K(E),XS(a)
    • P(j);CHECK,OGATE::QAB1(N),XP(j)
  • Actual
    • K(E);P-FLIGHT,P_SPINP(H),P_SPINR(G)
    • Threat
      • R(F)+K(E)
    • Vars
      • Q(k);CHECK,XR(G)::R(F)+K(E),XQ(k)
      • R(h);CHECK,XP(H)::R(F)+K(E),XR(h)
      • K(f);P-FLIGHT,P_SPINP(j)::R(F)+K(E)
      • R(i);XP(I)::R(F)+K(E),XR(i)
      • B(c);XP(D)::R(F)+K(E),XB(c)
      • Q(k);N_GUARD::QAR(N)
      • R(h);N_PINP(H),N_PINR(G)::R1(G),XP(g)
      • S(a);::R(F)+K(E),XS(a)
      • P(j);OGATE::QAB1(N),XP(j)
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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).