MESON Chess Problem Database

Problem Display
PID: 101783 (6Q1/3B4/3p4/3P3p/Npk5/1n6/1KN1P3/8 w - - 0 1)

di Scala, Pascal

diagrammes, 1990

6Q1/3B4/3p4/3P3p/Npk5/1n6/1KN1P3/8

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Se3#
    • 1...Sc5
      • 2.Sb6#
  • Tries
    • 1.Qh7?
      • threat
        • 2.Qd3#
      • 1...Sc1
        • 2.Qe4#
      • 1...Sd4
        • 2.Se3#
      • 1...Sc5
        • 2.Sb6#
      • 1...Kxd5!
    • 1.Qg1?
      • threat
        • 2.Sb6#
      • 1...Sd4
        • 2.Se3#
        • 2.Qxd4#
      • 1...Kxd5!
    • 1.Qg4+?
      • 1...Kxd5
        • 2.Qe6#
      • 1...Sd4
        • 2.Se3#
        • 2.Qxd4#
      • 1...hxg4!
    • 1.Qb8?
      • threat
        • 2.Qb5#
      • 1...Sd4
        • 2.Se3#
      • 1...Sc5
        • 2.Sb6#
      • 1...Kxd5!
    • 1.Qc8+?
      • 1...Sc5
        • 2.Sb6#
      • 1...Kxd5!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qd3#
      • 1...Kxd5
        • 2.Qe6#
      • 1...Sc1
        • 2.Qe4#
      • 1...Sd4
        • 2.Se3#
      • 1...Sc5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::S(B)
    • S(a);SBLOCK::S(D)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • S(a);N_GUARD::QAR2(G)
        • S(a);SBLOCK::S(B)
        • S(a);SBLOCK::S(D)
      • Refutation
        • K(c);S_FLIGHT,XP(E)
    • Try
      • Q(G);
      • Threat
        • S(D)
      • Refutation
        • K(c);S_FLIGHT,XP(E)
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(E)::QAB1(G)
      • Refutation
        • P(d);XQ(G)
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • S(a);SBLOCK::S(B)
        • S(a);SBLOCK::S(D)
      • Refutation
        • K(c);S_FLIGHT,XP(E)
    • Try
      • Q(G);CHECK
      • Vars
        • S(a);P_SPINS(a)::S(D)
      • Refutation
        • K(c);S_FLIGHT,XP(E)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XP(E)::QAB1(G)
      • S(a);N_GUARD::QAR2(G)
      • S(a);SBLOCK::S(B)
      • S(a);SBLOCK::S(D)
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