MESON Chess Problem Database

Problem Display
PID: 52425 (1bb1Q1B1/1p4N1/1P2r3/K4n2/R2PkN1R/3p1p2/3P4/7r w - - 0 1)

de Blasio, Francis JC

American Chess Bulletin, 1952

1bb1Q1B1/1p4N1/1P2r3/K4n2/R2PkN1R/3p1p2/3P4/7r

#2

10 + 9

5064 100 Years of the American Two-move Chess Problem 1962

SOLUTION

  • SOUND
  • Sets
    • 1...Re5+
      • 2.Bd5#
    • 1...Re7
      • 2.Bd5#
    • 1...Rxe8
      • 2.Bd5#
  • Tries
    • 1.Qc6+?
      • 1...Rxc6
        • 2.Bd5#
      • 1...bxc6!
    • 1.Qxe6+?
      • 1...Be5
        • 2.Qd5#
        • 2.Qxe5#
      • 1...Bxe6!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qxf5#
      • 1...Re5+
        • 2.d5#
      • 1...Rxb6
        • 2.Bd5#
      • 1...Rxg6
        • 2.Bd5#
      • 1...f2
        • 2.Qg2#
      • 1...Rc6
        • 2.Bd5#
      • 1...Rd6
        • 2.Sh3#
      • 1...Rf6
        • 2.Bd5#
      • 1...Re7
        • 2.Bd5#
      • 1...Re8
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(f);CHECK,OGATE::B(J)
    • R(f);OGATE::B(J)
    • R(f);N_SPINR(f),OGATE,XQ(I)::B(J)
  • Tries
    • Try
      • Q(I);CHECK,N_PINR(f)
      • Vars
        • R(f);OGATE,XQ(I)::B(J)
      • Refutation
        • P(g);XQ(I)
    • Try
      • Q(I);CHECK,XR(f)
      • Refutation
        • B(i);XQ(I)
  • Actual
    • Q(I);N_PINR(f),P_PINS(e)
    • Threat
      • QAB1(I),XS(e)
    • Vars
      • R(f);CHECK,SBLOCK::R(B)+P(C)
      • R(f);OGATE,XP(G)::B(J)
      • R(f);N_SPINS(e),OGATE,XQ(I)::B(J)
      • P(c);OGATEB::QAB(I)
      • R(f);OGATE::B(J)
      • R(f);S_CUTB(h)::R(E)+S(D)
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