MESON Chess Problem Database

Problem Display
PID: 84785 (b7/8/7N/5Bn1/5k2/1R6/6P1/Q3N2K w - - 0 1)

Hassberg, Eric Manfred

de Blasio, Francis JC

2nd Comm., Wurzburg-75 JT, 1949-1950

b7/8/7N/5Bn1/5k2/1R6/6P1/Q3N2K

#2

7 + 3

70 American Chess Problemist 1950
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg2+
      • 2.Sxg2#
  • Tries
    • 1.Sd3+?
      • 1...Kg3
        • 2.Qe1#
      • 1...Ke3!
    • 1.Qd4+?
      • 1...Be4
        • 2.Qd6#
      • 1...Se4!
    • 1.Qf6?
      • threat
        • 2.Bb1#
        • 2.Bc2#
        • 2.Bg6#
        • 2.Bh7#
        • 2.Qd6#
      • 1...Bxg2+
        • 2.Sxg2#
      • 1...Bf3
        • 2.Qd6#
      • 1...Be4
        • 2.Qd6#
      • 1...Sh3
        • 2.Bb1#
        • 2.Bc2#
        • 2.Bg6#
        • 2.Bh7#
      • 1...Se4
        • 2.Rf3#
      • 1...Se6
        • 2.Bb1#
        • 2.Bc2#
        • 2.Bg6#
        • 2.Bh7#
      • 1...Sf7
        • 2.Bb1#
        • 2.Bc2#
        • 2.Bg6#
        • 2.Bh7#
      • 1...Sh7
        • 2.Bxh7#
      • 1...Sf3!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qc7#
      • 1...Bxg2+
        • 2.Sxg2#
      • 1...Sf3
        • 2.g3#
      • 1...Sh3
        • 2.Qg3#
      • 1...Se4
        • 2.Rf3#
      • 1...Se6
        • 2.Qg3#
      • 1...Sf7
        • 2.Qg3#
      • 1...Sh7
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(c);CHECK,XP(D)::S(B),XB(c)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • B(c);P_SPINB(c)::QAB(A)
      • Refutation
        • S(b);N_PINP(D),P_SPINS(b)
    • Try
      • Q(A);
      • Threat
        • DUALS(5)
      • Vars
        • B(c);CHECK,XP(D)::S(B),XB(c)
        • B(c);::QAB(A)
        • S(b);N_GUARD,N_PINP(D),S_CUTB(c)::R1(E)
        • S(b);::QAR(A)+B(F),XS(b)
      • Refutation
        • S(b);N_PINP(D)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • B(c);CHECK,XP(D)::S(B),XB(c)
      • S(b);N_PINP(D)::P(D)
      • S(b);OGATE::QAB1(A)
      • S(b);N_GUARD,N_PINP(D),S_CUTB(c)::R1(E)
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