MESON Chess Problem Database

Problem Display
PID: 108928 (1K4b1/B1Q5/3Np3/1p3p1r/R6p/2pk2b1/3p1rn1/3Bn3 w - - 0 1)

Mendes de Moraes Filho, Feliciano

2nd Prize, Western Daily Mercury, 1913

1K4b1/B1Q5/3Np3/1p3p1r/R6p/2pk2b1/3p1rn1/3Bn3

#2

6 + 13

35 L'Italia Scacchistica 1930
6490 yacpdb 2009
14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd6
      • 2.Qxd6#
    • 1...Se3
      • 2.Rd4#
    • 1...c2
      • 2.Ra3#
    • 1...bxa4
      • 2.Qc4#
    • 1...b4
      • 2.Qc4#
  • Tries
    • 1.Bd4?
      • threat
        • 2.Qxc3#
      • 1...b4
        • 2.Qc4#
      • 1...c2
        • 2.Qc3#
      • 1...Bxd6!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxb5#
      • 1...Bxd6+
        • 2.Qxd6#
      • 1...bxa4
        • 2.Qb5#
      • 1...c2
        • 2.Ra3#
      • 1...Rf4
        • 2.Se4#
      • 1...Se3
        • 2.Rd4#
      • 1...b4
        • 2.Qb5#
      • 1...f4
        • 2.Sf5#
      • 1...e5
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(g);OGATE,P_PINQ(E),XS(C)::QAR(E),XB(g)
    • S(d);SBLOCK::R1(B)
    • P(e);OGATEB::R(B)
    • P(i);N_GUARD,XR(B)::QAB1(E)
    • P(i);N_GUARD::QAB1(E)
  • Tries
    • Try
      • B(D);
      • Threat
        • QAR1(E),XP(e)
      • Vars
        • P(i);N_GUARD::QAB1(E)
        • P(e);::QAR1(E)
      • Refutation
        • B(g);P_PINQ(E),XS(C)
  • Actual
    • Q(E);P_SPINS(C)
    • Threat
      • QAB(E),XP(i)
    • Vars
      • B(g);CHECK,OGATE,P_SPINB(g),XS(C)::QAR(E),XB(g)
      • P(i);XR(B)::QAB(E)
      • P(e);OGATEB::R(B)
      • R(c);N_PINS(C)::QAR(E)+S(C)
      • S(d);SBLOCK::R1(B)
      • P(i);::QAB(E)
      • P(j);N_PINS(C)::QAR(E)+S(C)
      • P(l);N_PINS(C)::QAR(E)+S(C)
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