MESON Chess Problem Database

Problem Display
PID: 124449 (8/3p3N/2PK1p2/R1N1BkpB/5p2/3P4/r7/Qr3R2 w - - 0 1)

Belliboni, Caetano

Enroque!!, 1946

8/3p3N/2PK1p2/R1N1BkpB/5p2/3P4/r7/Qr3R2

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.Rxf3#
    • 1...g4
      • 2.Rxf4#
    • 1...fxe5
      • 2.Qxe5#
  • Tries
    • 1.Se4?
      • threat
        • 2.Sg3#
      • 1...Rf2
        • 2.Bb2#
      • 1...Rg2
        • 2.Bb2#
      • 1...Rxf1!
    • 1.Se6?
      • threat
        • 2.Sd4#
        • 2.Sg7#
      • 1...Rb4
        • 2.Sg7#
      • 1...Ra4
        • 2.Sg7#
      • 1...dxe6!
  • Keys
    • 1.Bxf4!
      • threat
        • 2.Qxf6#
      • 1...Rbxa1
        • 2.Sa4#
      • 1...Raxa1
        • 2.Bc1#
      • 1...Rbb2
        • 2.Bd2#
      • 1...Rab2
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • P(c);OGATEB::R(B),XP(c)
    • P(e);N_GUARD::R1(B),XP(c)
    • P(f);OGATE,XB(F)::QAR1(A),XP(f)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • R(b);N_GUARD,N_SPINP(c)::R(D)+B(F)
        • R(b);N_GUARD::R(D)+B(F)
      • Refutation
        • R(a);N_SPINP(c),XR(B)
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::S(E)
        • R(b);::S(E)
      • Refutation
        • P(g);XS(E)
  • Actual
    • B(F);XP(c)
    • Threat
      • QAR1(A),XP(f)
    • Vars
      • R(a);N_GUARD,XQ(A)::R(D)+S(E)
      • R(b);N_GUARD,XQ(A)::R(B)+B(F)
      • R(a);N_GUARD::R(B)+B(F)
      • R(b);N_GUARD::R(D)+S(E)
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