MESON Chess Problem Database

Problem Display
PID: 124447 (7k/1b4pN/R4p1p/8/3B3P/8/B1Q4R/4K3 w - - 0 1)

Belliboni, Caetano

Diario de Sao Paulo, 1945

7k/1b4pN/R4p1p/8/3B3P/8/B1Q4R/4K3

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ba8
      • 2.Rxa8#
    • 1...g5
      • 2.Bxf6#
  • Tries
    • 1.Sxf6?
      • threat
        • 2.Qh7#
      • 1...gxf6
        • 2.Bxf6#
      • 1...Be4
        • 2.Qc8#
      • 1...g6!
    • 1.Sf8?
      • threat
        • 2.Qh7#
      • 1...g6
        • 2.Bxf6#
      • 1...f5
        • 2.Rxh6#
      • 1...Be4!
    • 1.Ra8+?
      • 1...Bc8
        • 2.Rxc8#
      • 1...Bxa8!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Qh7#
      • 1...fxg5
        • 2.Rxh6#
      • 1...hxg5
        • 2.hxg5#
      • 1...g6
        • 2.Bxf6#
      • 1...Be4
        • 2.Qc8#
      • 1...f5
        • 2.Rxh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • B(c);N_GUARD::R(G),XB(c)
    • P(d);OGATEB,P_SPINP(a)::B(E),XP(a)
  • Tries
    • Try
      • S(H);XP(a)
      • Threat
        • QAR1(C)
      • Vars
        • P(d);OGATE,P_SPINP(d),XS(H)::B(E),XP(d)
        • B(c);N_GUARD::QAR(C)
      • Refutation
        • P(d);
    • Try
      • S(H);
      • Threat
        • QAR1(C)
      • Vars
        • P(d);OGATEB,P_SPINP(a)::B(E),XP(a)
        • P(a);OGATE,P_SPINP(d)::R(G),XP(b)
      • Refutation
        • B(c);
    • Try
      • R(G);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::R(G),XB(c)
      • Refutation
        • B(c);XR(G)
  • Actual
    • S(H);
    • Threat
      • QAR1(C)
    • Vars
      • P(a);OGATE,P_SPINP(d),XS(H)::R(G),XP(b)
      • P(b);OGATE,XS(H)::R(D)+P(F),XP(b)
      • P(d);OGATEB,P_SPINP(a)::B(E),XP(a)
      • B(c);N_GUARD::QAR(C)
      • P(a);OGATE,P_SPINP(d)::R(G),XP(b)
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