MESON Chess Problem Database

Problem Display
PID: 16681 (7K/6R1/B4Q1B/n1p1bb2/3k1NR1/2p2P2/7n/4N3 w - - 0 1)

Hassberg, Eric Manfred

2nd Prize, Chess Correspondent, 1942

7K/6R1/B4Q1B/n1p1bb2/3k1NR1/2p2P2/7n/4N3

#2

9 + 7

70 American Chess Problemist 1950
133 The Problemist Supplement 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Bc2
      • 2.Sxc2#
    • 1...Bxg4
      • 2.Sc2#
    • 1...Be6
      • 2.Sc2#
    • 1...Bd7
      • 2.Sc2#
    • 1...Bc8
      • 2.Sc2#
    • 1...c4
      • 2.Qb6#
  • Tries
    • 1.Sg6+?
      • 1...Kd5
        • 2.Se7#
      • 1...Be4
        • 2.Rd7#
        • 2.Qxe5#
      • 1...Bxg4
        • 2.Qxe5#
      • 1...Sxg4!
    • 1.Rd7+?
      • 1...Bxd7
        • 2.Sc2#
      • 1...Ke3!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Se2#
      • 1...Bxg7+
        • 2.Bxg7#
      • 1...Ke3
        • 2.Sh3#
      • 1...Bxf4
        • 2.Rd7#
      • 1...Bxe6
        • 2.Sc2#
      • 1...c4
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(g);N_GUARD::S(A),XB(g)
    • B(g);N_GUARD,XR(D)::S(A)
    • B(g);N_GUARD::S(A)
    • P(e);OGATEB::QAB(F)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);N_SPINB(f),P-FLIGHT::S(C)
        • B(g);XR(D)::QAB1(F),XB(f)
      • Refutation
        • S(a);XR(D)
    • Try
      • R(H);CHECK,P_SPINQ(F)
      • Vars
        • B(g);XR(H)::S(A)
      • Refutation
        • K(c);N_SPINB(f),S_FLIGHT
  • Actual
    • Q(F);N_PINB(f),P_SPINR(H)
    • Threat
      • R(D)+S(C),DCHECK
    • Vars
      • B(f);CHECK,OGATE,XR(H)::B(G),XB(f)
      • K(c);P_SPINB(f),S_FLIGHT::B(G)+S(C)
      • B(f);N_PINR(H),P_SPINB(f),XS(C)::R(H)
      • B(g);N_GUARD,XQ(F)::S(A)
      • P(e);OGATEB::QAB(F)
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