MESON Chess Problem Database

Problem Display
PID: 103316 (bB2R3/4p3/3q2Qr/1Rp4r/3nPkNP/4pP2/4p1K1/4b2n w - - 0 1)

Somma, Francesco

Bollettino Ufficiale FSI, 1923-1926

bB2R3/4p3/3q2Qr/1Rp4r/3nPkNP/4pP2/4p1K1/4b2n

#2

9 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rg5
      • 2.Qxg5#
    • 1...Bxe4
      • 2.Qxe4#
  • Tries
    • 1.Rf8+?
      • 1...Rf5
        • 2.Qg5#
        • 2.Qxh6#
      • 1...Sf5!
    • 1.Qxh6+?
      • 1...Rg5
        • 2.Qxg5#
      • 1...Rxh6!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sd3#
      • 1...Qxg6+
        • 2.Sxg6#
      • 1...Rg5+
        • 2.Qxg5#
      • 1...Rxg6+
        • 2.Sxg6#
      • 1...Kxe5
        • 2.Bxd6#
      • 1...Qxe5
        • 2.Qg4#
      • 1...Rxe5
        • 2.Qg4#
      • 1...Bxe4
        • 2.Qxe4#
      • 1...Sf2
        • 2.Qg3#
      • 1...c4
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(h);N_GUARD,P_PINS(D)::QAB1(G),XR(h)
    • B(l);OGATE,P_PINP(B),XP(C)::QAR1(G),XB(l)
  • Tries
    • Try
      • R(I);CHECK
      • Refutation
        • S(e);P_SPINS(e)
    • Try
      • Q(G);CHECK,XR(j)
      • Vars
        • R(h);N_GUARD,P_PINS(D),P_SPINR(h)::QAB1(G),XR(h)
      • Refutation
        • R(h);XQ(G)
  • Actual
    • S(D);N_PINQ(i)
    • Threat
      • S(D)
    • Vars
      • Q(i);CHECK,XQ(G)::B(H)+S(D),DCHECK,XQ(i)
      • R(h);CHECK,N_GUARD::QAB1(G),XR(h)
      • R(j);CHECK,XQ(G)::S(D),XR(j)
      • K(f);OGATEB,P_SPINP(g),P_SPINQ(i),S_FLIGHT,XS(D)::B(H),XQ(i)
      • Q(i);P_SPINQ(i),XS(D)::QAR1(G)
      • R(h);SBLOCK,XS(D)::QAR1(G)
      • B(l);OGATE,P_PINP(B),XP(C)::QAR1(G),XB(l)
      • S(b);N_GUARD,S_CUTB(a)::QAB1(G)
      • P(g);::QAR1(G)
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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).