MESON Chess Problem Database

Problem Display
PID: 107960 (2b2K2/4R3/R2n3B/4N2k/5Q1p/b4r2/8/3B1r2 w - - 0 1)

de Blasio, Francis JC

5th HM., Enroque!!, 1948

2b2K2/4R3/R2n3B/4N2k/5Q1p/b4r2/8/3B1r2

#2

7 + 7

70 American Chess Problemist 1949
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Qg5#
    • 1...Sc4
      • 2.Qf7#
    • 1...Se4
      • 2.Qf7#
    • 1...Sb5
      • 2.Qf7#
    • 1...Sf5
      • 2.Qg5#
      • 2.Qg4#
    • 1...Sb7
      • 2.Qf7#
    • 1...Sf7
      • 2.Qxf7#
    • 1...Se8
      • 2.Qf7#
  • Tries
    • 1.Bxf3+?
      • 1...Bg4
        • 2.Bxg4#
        • 2.Qg5#
      • 1...Rxf3!
  • Keys
    • 1.Bg5!
      • threat
        • 2.Rh7#
      • 1...Bf5
        • 2.Qxh4#
      • 1...Sc4
        • 2.Rh6#
      • 1...Se4
        • 2.Rh6#
      • 1...Sb5
        • 2.Rh6#
      • 1...Sf5
        • 2.Qg4#
      • 1...Sb7
        • 2.Rh6#
      • 1...Sf7
        • 2.Qxh4#
      • 1...Se8
        • 2.Rh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 7
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(g);N_PINQ(B)::QAR1(B)
    • S(f);N_GUARD,P_PINR(F)::QAB(B)
    • S(f);N_GUARD,N_PINQ(B),P_PINR(F)::QAB(B),XS(f)
  • Tries
    • Try
      • B(A);CHECK,N_SPINQ(B),XR(c)
      • Refutation
        • R(a);P_PINQ(B),XB(A)
  • Actual
    • B(E);
    • Threat
      • R(F)
    • Vars
      • B(g);N_PINQ(B)::QAR1(B),XP(d)
      • S(f);OGATE,P_PINR(F)::R1(D)
      • S(f);N_PINQ(B),P_PINR(F)::QAB1(B)
      • S(f);N_PINQ(B),P_PINR(F)::QAR1(B),XP(d)
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