MESON Chess Problem Database

Problem Display
PID: 17400 (4B2q/7p/2bp4/2p1nQ2/P1k1pN2/2B1n2R/P7/1K1N2b1 w - - 0 1)

Hassberg, Eric Manfred

4th Prize, New York Post, 1946-1948

4B2q/7p/2bp4/2p1nQ2/P1k1pN2/2B1n2R/P7/1K1N2b1

#2

9 + 10

70 American Chess Problemist 1949
5064 100 Years of the American Two-move Chess Problem 1962

SOLUTION

  • SOUND
  • Sets
    • 1...Bxa4
      • 2.Qxe4#
    • 1...Bb5
      • 2.Bxb5#
      • 2.Qxe4#
    • 1...Bd5
      • 2.Bb5#
    • 1...Bb7
      • 2.Bb5#
    • 1...Bd7
      • 2.Qxe4#
    • 1...Ba8
      • 2.Bb5#
    • 1...Bxe8
      • 2.Qxe4#
    • 1...Sf1
      • 2.Sb2#
    • 1...Sc2
      • 2.Sb2#
    • 1...Sg2
      • 2.Sb2#
    • 1...S3g4
      • 2.Sb2#
    • 1...Sd5
      • 2.Sb2#
    • 1...Sxf5
      • 2.Sb2#
  • Tries
    • 1.Bf7+?
      • 1...Bd5
        • 2.Qxe4#
      • 1...Sd5
        • 2.Sb2#
      • 1...d5
        • 2.Qxe4#
      • 1...Sxf7!
    • 1.Qe6+?
      • 1...Bd5
        • 2.Bb5#
      • 1...Sd5
        • 2.Sb2#
      • 1...d5!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Qxe4#
      • 1...Kd3
        • 2.Qf1#
      • 1...Kxd5
        • 2.Bf7#
      • 1...Bxd5
        • 2.Bb5#
      • 1...Sxd1
        • 2.Sb6#
      • 1...Sxd5
        • 2.Sb2#
      • 1...Sxf5
        • 2.Sb6#
      • 1...Sf1
        • 2.Sb6#
      • 1...Sc2
        • 2.Sb6#
      • 1...Sg2
        • 2.Sb6#
      • 1...S3g4
        • 2.Sb6#
      • 1...Sd3
        • 2.Sb6#
      • 1...Sf3
        • 2.Sb2#
      • 1...S5g4
        • 2.Sb2#
      • 1...Sg6
        • 2.Sb2#
      • 1...Sd7
        • 2.Sb2#
      • 1...Sf7
        • 2.Sb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 9
    • REMOVED MATES = 5
  • Sets
    • B(g);N_GUARD,XP(F)::QAR2(H),XP(d)
    • B(g);OGATE::B(I)
    • B(g);N_GUARD::QAR2(H),XP(d)
    • B(g);N_GUARD,XB(I)::QAR2(H),XP(d)
    • S(b);::S(B)
    • S(b);XQ(H)::S(B)
  • Tries
    • Try
      • B(I);CHECK
      • Vars
        • B(g);P_SPINB(g)::QAR2(H),XP(d)
        • S(b);P_SPINS(b)::S(B)
        • P(h);P_SPINP(h)::QAR2(H),XP(d)
      • Refutation
        • S(f);XB(I)
    • Try
      • Q(H);CHECK
      • Vars
        • B(g);OGATE,P_SPINB(g)::B(I)
        • S(b);P_SPINS(b)::S(B)
      • Refutation
        • P(h);P_SPINP(h)
  • Actual
    • S(G);
    • Threat
      • QAR2(H),XP(d)
    • Vars
      • K(c);P_SPINP(d),P_SPINS(b),S_FLIGHT::QAB(H)
      • K(c);OGATEB,P_SPINS(f),S_FLIGHT,XS(G)::B(I)
      • B(g);OGATE,SBLOCK,XS(G)::B(I)
      • S(b);XS(B)::S(G)
      • S(b);SBLOCK,XS(G)::S(B)
      • S(b);XQ(H)::S(G)
      • S(b);::S(G)
      • S(f);SBLOCK::S(G)
      • S(f);::S(B)
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