MESON Chess Problem Database

Problem Display
PID: 18053 (B7/4p3/2nprpK1/pN2pR2/Rn1Pk1N1/8/p2PP3/Q3b3 w - - 0 1)

Hassberg, Eric Manfred

HM., American Chess Bulletin, 1953

B7/4p3/2nprpK1/pN2pR2/Rn1Pk1N1/8/p2PP3/Q3b3

#2

10 + 11

3105 FIDE Album (1945-1955) 1964

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd2
      • 2.Qh1#
    • 1...Bf2
      • 2.Qh1#
    • 1...Bg3
      • 2.Qh1#
    • 1...Bh4
      • 2.Qh1#
    • 1...Sc2
      • 2.Sc3#
    • 1...Sd3
      • 2.Sc3#
    • 1...Sd5
      • 2.d3#
    • 1...Sa6
      • 2.Sc3#
    • 1...exd4
      • 2.Qxd4#
  • Tries
    • 1.Sf2+?
      • 1...Bxf2
        • 2.Qh1#
      • 1...Kd5!
    • 1.Bxc6+?
      • 1...Sd5
        • 2.Sc3#
        • 2.d3#
        • 2.dxe5#
      • 1...Sxc6
        • 2.Sc3#
      • 1...d5!
    • 1.Rxb4?
      • threat
        • 2.Sc3#
      • 1...Kd5
        • 2.Sc3#
      • 1...Bxd2
        • 2.Qh1#
      • 1...axb4!
    • 1.d3+?
      • 1...Kd5
        • 2.Se3#
        • 2.Sc7#
        • 2.e4#
      • 1...Sxd3!
  • Keys
    • 1.d5!
      • 1...Kxd5
        • 2.Qd4#
      • 1...Bxd2
        • 2.Qh1#
      • 1...Bf2
        • 2.Qh1#
      • 1...Bg3
        • 2.Qh1#
      • 1...Bh4
        • 2.Qh1#
      • 1...Sd4
        • 2.Sc3#
      • 1...Sa7
        • 2.d3#
      • 1...Sb8
        • 2.d3#
      • 1...Sd8
        • 2.d3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • B(a);OGATE,XP(B)::QAB(A)
    • B(a);OGATE::QAB(A)
    • S(c);::S(G)
    • S(c);N_GUARD,N_SPINS(g),SBLOCK::P(B)
    • P(f);OGATE,XP(E)::QAR1(A),XP(f)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • B(a);OGATE,XS(F)::QAB(A)
      • Refutation
        • K(d);P_SPINP(f),S_FLIGHT
    • Try
      • B(J);CHECK,XS(g)
      • Vars
        • S(c);XB(J)::S(G)
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • R(D);XS(c)
      • Threat
        • S(G)
      • Vars
        • K(d);P_SPINP(f),S_FLIGHT::S(G)
        • B(a);OGATE,XP(B)::QAB(A)
      • Refutation
        • P(e);XR(D)
    • Try
      • P(B);CHECK
      • Refutation
        • S(c);XP(B)
  • Actual
    • P(E);N_PINS(g),P_PINS(c)
    • Vars
      • K(d);N_SPINS(c),P_SPINP(f),P_SPINS(g),S_FLIGHT,XP(E)::QAR1(A)
      • B(a);OGATE,XP(B)::QAB(A)
      • B(a);OGATE::QAB(A)
      • S(g);N_SPINS(c),SBLOCK::S(G)
      • S(g);::P(B)
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