MESON Chess Problem Database

Problem Display
PID: 248187 (8/3KpN1R/Q1NP1k2/5B2/1p4P1/1r3R2/1p3rp1/2b2b2 w - - 0 1)

de Blasio, Francis JC

1st HM., Allen TT, 1953

8/3KpN1R/Q1NP1k2/5B2/1p4P1/1r3R2/1p3rp1/2b2b2

#2

9 + 9

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2
      • 2.Bd3#
      • 2.g5#
    • 1...Re3
      • 2.g5#
  • Tries
    • 1.Sxe7?
      • threat
        • 2.Sd5#
        • 2.Sg8#
      • 1...Rd2
        • 2.Sg8#
        • 2.Bd3#
        • 2.g5#
      • 1...Rd3
        • 2.Sg8#
      • 1...Bc4
        • 2.Sg8#
      • 1...Bb5+!
    • 1.Bd3+?
      • 1...Bf4
        • 2.g5#
      • 1...Rxf3!
  • Keys
    • 1.dxe7!
      • threat
        • 2.e8S#
      • 1...Rd2+
        • 2.Bd3#
      • 1...Rd3+
        • 2.Sd4#
      • 1...Re2
        • 2.Sce5#
      • 1...Re3
        • 2.g5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(f);S_CUTB(a)::P(B)
  • Tries
    • Try
      • S(E);XP(i)
      • Threat
        • DUALS(2)
      • Vars
        • R(f);P_PINP(F)::S(E)
        • B(b);::S(E)
      • Refutation
        • B(b);CHECK
    • Try
      • B(C);CHECK
      • Vars
        • B(a);P_SPINB(a)::P(B)
      • Refutation
        • R(d);XR(A)
  • Actual
    • P(F);XP(i)
    • Threat
      • P=S
    • Vars
      • R(d);CHECK,N_GUARD,S_CUTB(a)::R(A)+B(C)
      • R(f);CHECK,S_CUTB(b)::QAR(D)+S(E)
      • R(d);S_CUTB(b)::QAR(D)+S(E)
      • R(f);S_CUTB(a)::P(B)
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