MESON Chess Problem Database

Problem Display
PID: 110020 (4Q1b1/2N2p2/5BN1/2p2pRp/1pk3nK/n1Pp4/P7/8 w - - 0 1)

Carra, Arturo

Il Littorale, 1929-1931

4Q1b1/2N2p2/5BN1/2p2pRp/1pk3nK/n1Pp4/P7/8

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bh7
      • 2.Qxf7#
    • 1...Sb1
      • 2.Qb5#
    • 1...Sc2
      • 2.Qb5#
    • 1...Sb5
      • 2.Qxb5#
    • 1...d2
      • 2.Qe2#
    • 1...bxc3
      • 2.Qa4#
    • 1...b3
      • 2.Qa4#
    • 1...f4
      • 2.Qe4#
    • 1...fxg6
      • 2.Qxg8#
  • Tries
    • 1.Rxg4+?
      • 1...fxg4
        • 2.Qe4#
      • 1...f4
        • 2.Rxf4#
        • 2.Qe4#
      • 1...hxg4!
  • Keys
    • 1.Bd4!
      • 1...bxc3
        • 2.Qa4#
      • 1...cxd4
        • 2.Qc6#
      • 1...fxg6
        • 2.Qxg8#
      • 1...d2
        • 2.Qe2#
      • 1...Bh7
        • 2.Qxf7#
      • 1...Sb1
        • 2.Qb5#
      • 1...Sc2
        • 2.Qb5#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sf2
        • 2.Se5#
      • 1...Sh2
        • 2.Se5#
      • 1...Se3
        • 2.Se5#
      • 1...Se5
        • 2.Sxe5#
      • 1...Sf6
        • 2.Se5#
      • 1...Sh6
        • 2.Se5#
      • 1...b3
        • 2.Qa4#
      • 1...f4
        • 2.Rxc5#
      • 1...f6
        • 2.Qxg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • B(j);N_GUARD::QAB(H),XP(i)
    • S(a);N_GUARD::QAB1(H)
    • S(a);N_GUARD::QAB1(H),XS(a)
    • P(b);OGATEB::QAB(H)
    • P(c);OGATEB,XP(B)::QAR2(H)
    • P(c);OGATEB::QAR2(H)
    • P(g);N_GUARD::QAR2(H)
    • P(i);OGATEB,XS(F)::QAB(H),XB(j)
  • Tries
    • Try
      • R(D);CHECK,XS(e)
      • Vars
        • P(g);N_GUARD,XR(D)::QAR2(H)
      • Refutation
        • P(h);XR(D)
  • Actual
    • B(E);
    • Vars
      • P(c);OGATEB,XP(B)::QAR2(H)
      • P(f);OGATEB,XB(E)::QAR2(H)
      • P(i);OGATEB,XS(F)::QAB(H),XB(j)
      • P(b);OGATEB::QAB(H)
      • B(j);N_GUARD::QAB(H),XP(i)
      • S(a);N_GUARD::QAB1(H)
      • S(a);N_GUARD::QAB1(H),XS(a)
      • S(e);N_GUARD::S(F)
      • S(e);N_GUARD::S(F),XS(e)
      • P(c);OGATEB::QAR2(H)
      • P(g);OGATE::R1(D),XP(f)
      • P(i);OGATEB::QAB(H),XB(j)
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