MESON Chess Problem Database

Problem Display
PID: 96945 (7Q/8/8/4p2R/1N6/Np1P4/qk1B3K/b7 w - - 0 1)

Belliboni, Caetano

Introducao ao Problema Ortodoxo, 1981

7Q/8/8/4p2R/1N6/Np1P4/qk1B3K/b7

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Sc4#
  • Tries
    • 1.Qc8?
      • threat
        • 2.Bc1#
        • 2.Qc1#
      • 1...Qxa3
        • 2.Qc1#
      • 1...Qb1
        • 2.Sc4#
      • 1...Kxa3!
  • Keys
    • 1.Rxe5!
      • threat
        • 2.Ra5#
      • 1...Kxa3
        • 2.Ra5#
      • 1...Qxa3
        • 2.Re1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(b);SBLOCK::S(C)
  • Tries
    • Try
      • Q(G);N_PINP(e)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);SBLOCK,XS(C)::QAB1(G)
        • Q(b);SBLOCK::S(C)
      • Refutation
        • K(c);P_PINB(A),S_FLIGHT,XS(C)
  • Actual
    • R(F);XP(e)
    • Threat
      • QAB(G)+R(F)
    • Vars
      • K(c);P_PINB(A),S_FLIGHT,XS(C)::R(F)
      • Q(b);SBLOCK,XS(C)::QAB(G)+R(F)
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