MESON Chess Problem Database

Problem Display
PID: 117810 (3BK3/8/2pNQ3/2kP1N2/2p1p3/2P5/8/1q6 w - - 0 1)

Novis Filho, Mario

Boletim da UBP, 1962

3BK3/8/2pNQ3/2kP1N2/2p1p3/2P5/8/1q6

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Sxe4#
    • 1...cxd5
      • 2.Qc8#
  • Tries
    • 1.Sxe4+?
      • 1...Kb5
        • 2.Qxc6#
      • 1...Qxe4!
    • 1.Sb7+?
      • 1...Kb5
        • 2.Qxc6#
      • 1...Qxb7!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Qxc6#
      • 1...Kxb5
        • 2.Qxc6#
      • 1...Qxb5
        • 2.Qd6#
      • 1...cxb5
        • 2.Bb6#
        • 2.Be7#
        • 2.Qc6#
        • 2.Qd6#
      • 1...cxd5
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_GUARD,SBLOCK::S(D),XP(c)
    • P(e);OGATEB,SBLOCK,XP(B)::QAR(E)
  • Tries
    • Try
      • S(D);CHECK,XP(c)
      • Vars
        • K(d);P-FLIGHT::QAB1(E),XP(e)
      • Refutation
        • Q(a);P_PINQ(E),XS(D)
    • Try
      • S(D);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB1(E),XP(e)
      • Refutation
        • Q(a);XS(D)
  • Actual
    • S(D);
    • Threat
      • QAR1(E),XP(e)
    • Vars
      • K(d);P-FLIGHT,XS(D)::QAB1(E),XP(e)
      • Q(a);SBLOCK,XS(D)::QAB1(E)
      • P(e);OGATE,SBLOCK,XP(B)::QAB1(E)
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